#!/usr/bin/env python3

#    Gscreen a GUI for linuxcnc cnc controller
#    Chris Morley copyright 2012
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

"""
# Gscreen is made for running linuxcnc CNC machines
# Gscreen was built with touchscreens in mind though a mouse works too.
# a keyboard is necessary for editing gcode
# Gscreen is, at it's heart, a gladevcp program though loaded in a non standard way.
# one can also use a second monitor to display a second glade panel
# this would probably be most useful for user's custom status widgets.
# you would need to calibrate your touchscreen to just work on a single screen
"""
import sys,os,subprocess
def _print_help():
            print(""" Gscreen a customizable operator screen for linuxcnc based on pyGTK / GLADE.\n
        It is usually loaded from linuxcnc's INI file under the [DISPLAY] HEADER
        eg. DISPLAY = gscreen\n
        Options:
        --INI.................Designates the configuration file path for linuxcnc
        -c....................Loads an optional skin for Gscreen
        -d....................Debug mode
        -v....................Verbose debug mode
        -F....................Prints documentation of internal functions to standard output
        """)
            sys.exit(0)

for num,temp in enumerate(sys.argv):
        if temp == '-h' or temp == '--help' or len(sys.argv) == 1:
            _print_help()

# Set up the base logger
#   We have do do this before importing other modules because on import
#   they set up their own loggers as children of the base logger.
from qtvcp import logger
LOG = logger.initBaseLogger('GScreen', log_file=None, log_level=logger.INFO)

import gi
gi.require_version("Gtk","3.0")
gi.require_version("Gdk","3.0")
gi.require_version('PangoCairo', '1.0')
from gi.repository import Gtk,Gdk,GObject,Pango,PangoCairo,cairo,GLib
from gi.repository import Pango as pango
try:
    from gi.repository import Vte as vte
except:
    LOG.error("**** WARNING GSCREEN: could not import vte terminal - is package installed?")

import hal
import errno
import gladevcp.makepins
from gladevcp.gladebuilder import GladeBuilder
#import pango
import traceback
import atexit

import time
from time import strftime,localtime
import hal_glib

#--------------------------------------------------------
# limit number of times err msgs are displayed
excepthook_msg_ct = 0
excepthook_msg_ct_max = 10

update_spindle_bar_error_ct = 0
update_spindle_bar_error_ct_max = 3
#--------------------------------------------------------

# try to add a notify system so messages use the
# nice integrated pop-ups
# Ubuntu kinda wrecks this be not following the
# standard - you can't set how long the message stays up for.
# I suggest fixing this with a PPA off the net
# https://launchpad.net/~leolik/+archive/leolik?field.series_filter=lucid
NOTIFY_AVAILABLE = False
try:
    import pynotify
    if not pynotify.init("Gscreen"):
        print("**** GSCREEN INFO: There was a problem initializing the pynotify module")
    else:
        NOTIFY_AVAILABLE = True
except:
    print("**** GSCREEN INFO: You don't seem to have pynotify installed")

_AUDIO_AVAILABLE = False
# try to add ability for audio feedback to user.
try:
    import pygst
    pygst.require("0.10")
    import gst
    _AUDIO_AVAILABLE = True
    print("**** GSCREEN INFO: audio available!")
except:
    print("**** GSCREEN WARNING: no audio alerts available - Is python-gst0.10 library installed?")

# BASE is the absolute path to linuxcnc base
# libdir is the path to Gscreen python files
# datadir is where the standard GLADE files are
# imagedir is for icons
# themedir is path to system's GTK2 theme folder
BASE = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), ".."))
libdir = os.path.join(BASE, "lib", "python")
datadir = os.path.join(BASE, "share", "linuxcnc")
imagedir = os.path.join(BASE, "share","gscreen","images")
SKINPATH = os.path.join(BASE, "share","gscreen","skins")
sys.path.insert(0, libdir)
themedir = "/usr/share/themes"
userthemedir = os.path.join(os.path.expanduser("~"), ".themes")

xmlname = os.path.join(datadir,"gscreen.glade")
xmlname2 = os.path.join(datadir,"gscreen2.glade")
ALERT_ICON = os.path.join(imagedir,"applet-critical.png")
INFO_ICON = os.path.join(imagedir,"std_info.gif")

# internationalization and localization
import locale, gettext


# path to TCL for external programs eg. halshow
try:
    TCLPATH = os.environ['LINUXCNC_TCL_DIR']
except:
    pass
# path to the configuration the user requested
# used to see if the is local GLADE files to use
try:
    CONFIGPATH = os.environ['CONFIG_DIR']
except:
    pass
import linuxcnc
from gscreen import emc_interface
from gscreen import mdi
from gscreen import preferences
from gscreen import keybindings

# this is for hiding the pointer when using a touch screen
#pixmap = gdk.Pixmap(None, 1, 1, 1)
#color = gdk.Color()
#INVISABLE = gdk.Cursor(pixmap, pixmap, color, color, 0, 0)
INVISIBLE = Gdk.Cursor(Gdk.CursorType.BLANK_CURSOR)

# to help with debugging new screens
verbose_debug = False
# print debug messages if debug is true
gscreen_debug = False

def dbg(str):
    global gscreen_debug
    if not gscreen_debug: return
    print(str)

# Throws up a dialog with debug info when an error is encountered 
def excepthook(exc_type, exc_obj, exc_tb):
    try:
        w = app.widgets.window1
    except KeyboardInterrupt:
        sys.exit(0)
    except NameError:
        w = None
    lines = traceback.format_exception(exc_type, exc_obj, exc_tb)
    global excepthook_msg_ct,excepthook_msg_ct_max
    excepthook_msg_ct += 1
    if excepthook_msg_ct < excepthook_msg_ct_max:
        print("*******************************************************\n",excepthook_msg_ct)
        print("".join(lines))
        print("*******************************************************\n",excepthook_msg_ct)
    if excepthook_msg_ct < 1:
        m = Gtk.MessageDialog(
                parent = w,
                message_type = Gtk.MessageType.ERROR, 
                buttons = Gtk.ButtonsType.OK, 
                text = ("Gscreen encountered an error.  The following "
                "information may be useful in troubleshooting:\n\n")
                + "".join(lines),
                modal=True, 
                destroy_with_parent=True
            )
        m.show()
        m.run()
        m.destroy()
sys.excepthook = excepthook

# constants
_X = 0;_Y = 1;_Z = 2;_A = 3;_B = 4;_C = 5;_U = 6;_V = 7;_W = 8
_ABS = 0;_REL = 1;_DTG = 2
_SPINDLE_INPUT = 1;_PERCENT_INPUT = 2;_VELOCITY_INPUT = 3;_DEGREE_INPUT = 4

# the player class does the work of playing the audio hints
# http://pygstdocs.berlios.de/pygst-tutorial/introduction.html
class Player:
    def __init__(self):
        #Element playbin automatic plays any file
        self.player = gst.element_factory_make("playbin", "player")
        #Enable message bus to check for errors in the pipeline
        bus = self.player.get_bus()
        bus.add_signal_watch()
        bus.connect("message", self.on_message)
        self.loop = gobject.MainLoop()

    def run(self):
        self.player.set_state(gst.STATE_PLAYING)
        self.loop.run()

    def set_sound(self,file):
        #Set the uri to the file
        self.player.set_property("uri", "file://" + file)

    def on_message(self, bus, message):
        t = message.type
        if t == gst.MESSAGE_EOS:
            #file ended, stop
            self.player.set_state(gst.STATE_NULL)
            self.loop.quit()
        elif t == gst.MESSAGE_ERROR:
            #Error occurred, print and stop
            self.player.set_state(gst.STATE_NULL)
            err, debug = message.parse_error()
            print( "Error: %s" % err, debug)
            self.loop.quit()

# a class for holding the glade widgets rather then searching for them each time
class Widgets:
    def __init__(self, xml):
        self._xml = xml
    def __getattr__(self, attr):
        r = self._xml.get_object(attr)
        if r is None: raise AttributeError( "No widget %r" % attr)
        return r
    def __getitem__(self, attr):
        r = self._xml.get_object(attr)
        if r is None: raise IndexError( "No widget %r" % attr)
        return r

# a class for holding data
# here we initialize the data
class Data:
    def __init__(self):
        # constants for mode idenity
        self._MAN = 0
        self._MDI = 1
        self._AUTO = 2
        self._JOG = 3
        self._MM = 1
        self._IMPERIAL = 0
        # paths included to give access to handler files
        self.SKINPATH = SKINPATH
        self.CONFIGPATH = CONFIGPATH
        self.BASEPATH = BASE

        self.audio_available = False
        self.use_screen2 = False
        self.theme_name = "Follow System Theme"
        self.abs_textcolor = ""
        self.rel_textcolor = ""
        self.dtg_textcolor = ""
        self.err_textcolor = ""
        self.window_geometry = ""
        self.window_max = ""
        self.axis_list = []
        self.rotary_joints = False
        self.active_axis_buttons = [(None,None)] # axis letter,axis number
        self.abs_color = (0, 65535, 0)
        self.rel_color = (65535, 0, 0)
        self.dtg_color = (0, 0, 65535)
        self.highlight_color = (65535,65535,65535)
        self.highlight_major = False
        self.display_order = (_REL,_DTG,_ABS)
        self.mode_order = (self._MAN,self._MDI,self._AUTO)
        self.mode_labels = [_("Manual Mode"),_("MDI Mode"),_("Auto Mode")]
        self.IPR_mode = False
        self.plot_view = ("p","x","y","y2","z","z2")
        self.task_mode = 0
        self.active_gcodes = []
        self.active_mcodes = []
        for letter in ('x','y','z','a','b','c','u','v','w'):
            self['%s_abs'%letter] = 0.0
            self['%s_rel'%letter] = 0.0
            self['%s_dtg'%letter] = 0.0
            self['%s_is_homed'%letter] = False
        self.spindle_request_rpm = 0
        self.spindle_dir = 0
        self.spindle_speed = 0
        self.spindle_start_rpm = 300
        self.spindle_preset = 300
        self.active_spindle_command = "" # spindle command setting
        self.active_feed_command = "" # feed command setting
        self.system = 1
        self.estopped = True
        self.dro_units = self._IMPERIAL
        self.machine_units = self._IMPERIAL
        self.tool_in_spindle = 0
        self.flood = False
        self.mist = False
        self.machine_on = False
        self.or_limits = False
        self.op_stop = False
        self.block_del = False
        self.all_homed = False

        self.jog_rate = 15
        self.jog_rate_inc = 1
        self.jog_rate_max = 60
        self.jog_increments = []
        self.current_jogincr_index = 0
        self.angular_jog_adjustment_flag = False
        self.angular_jog_increments = []
        self.angular_jog_rate = 1800
        self.angular_jog_rate_inc = 60
        self.angular_jog_rate_max = 7200
        self.current_angular_jogincr_index = 0
        self.feed_override = 1.0
        self.feed_override_inc = .05
        self.feed_override_max = 2.0
        self.rapid_override = 1.0
        self.rapid_override_inc = .05
        self.rapid_override_max = 1.0
        self.spindle_override = 1.0
        self.spindle_override_inc = .05
        self.spindle_override_max = 1.2
        self.spindle_override_min = .50
        self.maxvelocity = 1
        self.velocity_override = 1.0
        self.velocity_override_inc = .05
        self.edit_mode = False
        self.full_graphics = False
        self.graphic_move_inc = 20
        self.plot_hidden = False
        self.file = ""
        self.file_lines = 0
        self.line = 0
        self.last_line = 0
        self.motion_line = 0
        self.id = 0
        self.dtg = 0.0
        self.show_dtg = False
        self.velocity = 0.0
        self.delay = 0.0
        self.preppedtool = None
        self.lathe_mode = False
        self.diameter_mode = True
        self.tooleditor = ""
        self.tooltable = ""
        self.alert_sound = "/usr/share/sounds/ubuntu/stereo/bell.ogg"         
        self.error_sound  = "/usr/share/sounds/ubuntu/stereo/dialog-question.ogg"
        self.ob = None
        self.index_tool_dialog = None
        self.keyboard_dialog = None
        self.preset_spindle_dialog = None
        self.spindle_control_dialog = None
        self.entry_dialog = None
        self.restart_dialog = None
        self.key_event_last = None,0


    def __getitem__(self, item):
        return getattr(self, item)
    def __setitem__(self, item, value):
        return setattr(self, item, value)

# trampoline and load_handlers are used for custom displays
class Trampoline(object):
    def __init__(self,methods):
        self.methods = methods

    def __call__(self, *a, **kw):
        for m in self.methods:
            m(*a, **kw)

def load_handlers(usermod,halcomp,builder,useropts,gscreen):
    hdl_func = 'get_handlers'
    mod = object = None
    def add_handler(method, f):
        if method in handlers:
            handlers[method].append(f)
        else:
            handlers[method] = [f]
    handlers = {}
    for u in usermod:
        (directory,filename) = os.path.split(u)
        (basename,extension) = os.path.splitext(filename)
        if directory == '':
            directory = '.'
        if directory not in sys.path:
            sys.path.insert(0,directory)
            print(_('adding import dir %s' % directory))
        try:
            mod = __import__(basename)
        except ImportError as msg:
            print("module '%s' skipped - import error: %s" %(basename,msg))
            continue
        print(_("module '%s' imported OK" % mod.__name__))
        try:
            # look for functions
            for temp in ("periodic","connect_signals","initialize_widgets"):
                h = getattr(mod,temp,None)
                if h and callable(h):
                    print( ("module '%s' : '%s' function found" % (mod.__name__,temp)))

            # look for 'get_handlers' function
            h = getattr(mod,hdl_func,None)
            if h and callable(h):
                print( ("module '%s' : '%s' function found" % (mod.__name__,hdl_func)))
                objlist = h(halcomp,builder,useropts,gscreen)
            else:
                # the module has no get_handlers() callable.
                # in this case we permit any callable except class Objects in the module to register as handler
                dbg("module '%s': no '%s' function - registering only functions as callbacks" % (mod.__name__,hdl_func))
                objlist =  [mod]
            # extract callback candidates
            for object in objlist:
                dbg("Registering handlers in module %s object %s" % (mod.__name__, object))
                if isinstance(object, dict):
                    methods = list(dict.items())
                else:
                    methods = [(n, getattr(object, n, None)) for n in dir(object)]
                for method,f in methods:
                    if method.startswith('_'):
                        continue
                    if callable(f):
                        dbg("Register callback '%s' in %s" % (method, basename))
                        add_handler(method, f)
        except Exception as e:
            print ("**** GSCREEN ERROR: trouble looking for handlers in '%s': %s" %(basename, e))
            traceback.print_exc()

    # Wrap lists in Trampoline, unwrap single functions
    for n,v in list(handlers.items()):
        if len(v) == 1:
            handlers[n] = v[0]
        else:
            handlers[n] = Trampoline(v)

    return handlers,mod,object

# ok here is the Gscreen class
# there are also three other files:
# mdi.py for mdi commands (which include non-obvious mdi commands done in maual mode)
# preference.py for keeping track of stored user preferences
# emc_interface.py which does most of the commands and status of linuxcnc
# keep in mind some of the gladeVCP widgets send-commands-to/monitor linuxcnc also

class Gscreen: 

    def __init__(self):
        global xmlname
        global xmlname2
        global gscreen_debug
        global verbose_debug
        self.skinname = "gscreen"

        (progdir, progname) = os.path.split(sys.argv[0])

        # linuxcnc adds -ini to display name and optparse
        # can't understand that, so we do it manually 
        for num,temp in enumerate(sys.argv):
            if temp == '-c':
                try:
                    print (("**** GSCREEN INFO: Skin name ="),sys.argv[num+1])
                    self.skinname = sys.argv[num+1]
                except:
                    pass
            if temp == '-d': gscreen_debug = True
            if temp == '-v': verbose_debug = True
            if temp == '-F':
                self._print_functions()
                sys.exit(0)
        try:
            self.inipath = sys.argv[2]
        except:
            print(_("**** GSCREEN ERROR: INI file path missing from Gscreen launch command ****\n"))
            _print_help()
            sys.exit(0)
        # check for a local translation folder
        locallocale = os.path.join(CONFIGPATH,"locale")
        if os.path.exists(locallocale):
            LOCALEDIR = locallocale
            domain = self.skinname
            print(_("**** GSCREEN INFO: CUSTOM locale name =",LOCALEDIR,self.skinname))
        else:
            locallocale = os.path.join(SKINPATH,"%s/locale"%self.skinname)
            if os.path.exists(locallocale):
                LOCALEDIR = locallocale
                domain = self.skinname
                print(_("**** GSCREEN INFO: SKIN locale name =",LOCALEDIR,self.skinname))
            else:
                LOCALEDIR = os.path.join(BASE, "share", "locale")
                domain = "linuxcnc"
        locale.setlocale(locale.LC_ALL, '')
        locale.bindtextdomain(domain, LOCALEDIR)
        gettext.install(domain, localedir=LOCALEDIR)
        gettext.bindtextdomain(domain, LOCALEDIR)

        # main screen
        localglade = os.path.join(CONFIGPATH,"%s.glade"%self.skinname)
        if os.path.exists(localglade):
            print(_("\n**** GSCREEN INFO:  Using CUSTOM glade file from %s ****"% localglade))
            xmlname = localglade
        else:
            localglade = os.path.join(SKINPATH,"%s/%s.glade"%(self.skinname,self.skinname))
            if os.path.exists(localglade):
                print(_("\n**** GSCREEN INFO:  Using SKIN glade file from %s ****"% localglade))
                xmlname = localglade
            else:
                print(_("\n**** GSCREEN INFO:  using STOCK glade file from: %s ****"% xmlname2))
        try:
            self.xml = Gtk.Builder()
            self.xml.set_translation_domain(domain) # for locale translations
            self.xml.add_from_file(xmlname)
            # this is a fix for themeing - it sets the widgets style name to 
            # the widget id name. You can over ride it later with:
            # self.widgets.<OBJECT NAME>.set_name('<STYLE NAME>')
            for o in self.xml.get_objects():
                if isinstance(o, Gtk.Widget):
                    name = Gtk.Buildable.get_name(o)
                    if name: o.set_name(name)
        except Exception as e:
            print(e)
            print(_("**** Gscreen GLADE ERROR:    With main screen xml file: %s"% xmlname))
            sys.exit(0)
        # second screen
        localglade = os.path.join(CONFIGPATH,"%s2.glade"%self.skinname)
        if os.path.exists(localglade):
            print(_("\n**** GSCREEN INFO:  Screen 2 -Using CUSTOM glade file from %s ****"% localglade))
            xmlname2 = localglade
            try:
                self.xml.add_from_file(xmlname2)
                self.screen2 = True
            except:
                print(_("**** Gscreen GLADE ERROR:    With screen 2's xml file: %s"% xmlname))
        else:
            print(_("\n**** GSCREEN INFO:  No Screen 2 glade file present"))
        self.screen2 = False
        self.widgets = Widgets(self.xml)
        self.data = Data()
        self.keylookup = keybindings.Keylookup()

        if _AUDIO_AVAILABLE:
            try:
                self.audio = Player()
                self.data.audio_available = True
            except:
                print("**** GSCREEN WARNING: Audio test failed - Is gstreamer0.10-plugins-base installed?")
                self.data.audio_available = False

        # access to EMC control
        self.emc = emc_interface.emc_control(linuxcnc)
        # access to EMC status
        self.status = emc_interface.emc_status( self.data, linuxcnc)
        # access to MDI
        mdi_labels = mdi_eventboxes = []
        self.mdi_control = mdi.mdi_control(Gtk, linuxcnc, mdi_labels, mdi_eventboxes)
        # pull info from the INI file
        self.inifile = self.emc.emc.ini(self.inipath)
        # change the display based on the requested axis
        temp = self.inifile.find("TRAJ","COORDINATES")
        if temp == None:
            self.add_alarm_entry("No coordinates entry found in [TRAJ] of INI file")
        self.data.axis_list = []
        for letter in temp:
            if letter.lower() in self.data.axis_list: continue
            if not letter.lower() in ["x","y","z","a","b","c","u","v","w"]: continue
            self.data.axis_list.append(letter.lower())
        # check for rotary joints
        for i in("a","b","c"):
            if i in self.data.axis_list:
                self.data.rotary_joints = True
                break
        # check the INI file if UNITS are set to mm"
        # first check the global settings
        units=self.inifile.find("TRAJ","LINEAR_UNITS")
        if units==None:
            # else then the X axis units
            units=self.inifile.find("AXIS_X","UNITS")
            if units==None:
                self.add_alarm_entry(_("No UNITS entry found in [TRAJ] or [AXIS_X] of INI file"))
        if units=="mm" or units=="metric" or units == "1.0":
            self.machine_units_mm=1
            conversion=[1.0/25.4]*3+[1]*3+[1.0/25.4]*3
        else:
            self.machine_units_mm=0
            conversion=[25.4]*3+[1]*3+[25.4]*3
        self.status.set_machine_units(self.machine_units_mm,conversion)

        # set-up HAL component
        try:
            self.halcomp = hal.component("gscreen")
        except:
            print(_("*** Gscreen ERROR:    Asking for a HAL component using a name that already exists."))
            sys.exit(0)
        panel = gladevcp.makepins.GladePanel( self.halcomp, xmlname, self.xml, None)
        # at this point, any glade HAL widgets and their pins are set up.

        # look for custom handler files:
        HANDLER_FN = "%s_handler.py"%self.skinname
        local_handler_path = os.path.join(CONFIGPATH,HANDLER_FN)
        skin_handler_path = os.path.join(SKINPATH,"%s/%s"%(self.skinname,HANDLER_FN))
        if os.path.exists(local_handler_path):
            temp = [local_handler_path]
        elif os.path.exists(skin_handler_path):
            temp = [skin_handler_path]
        else:
            temp = []
        dbg("**** GSCREEN INFO: handler file path: %s"%temp)
        handlers,self.handler_module,self.handler_instance = load_handlers(temp,self.halcomp,self.xml,[],self)
        self.xml.connect_signals(handlers)

        # Look for an optional preferece file path otherwise it uses ~/.gscreen_preferences
        # then initiate access to saved preferences
        temp = self.inifile.find("DISPLAY","PREFERENCE_FILE_PATH")
        dbg("**** GSCREEN INFO: Preference file path: %s"%temp)
        self.prefs = preferences.preferences(temp)

        # Initialize prefereces either from the handler file or from Gscreen
        if "initialize_preferences" in dir(self.handler_instance):
            self.handler_instance.initialize_preferences()
        else:
            self.initialize_preferences()

        # check for ladder loaded
        self.data.is_ladder = hal.component_exists('classicladder_rt')

        # get the system wide theme
        settings = Gtk.Settings.get_default()
        settings.props.gtk_button_images = True
        self.data.system_theme = settings.get_property("gtk-theme-name")
        # check for a local theme gtkrc file
        localtheme = os.path.join(CONFIGPATH,'%s_theme'%self.skinname)
        if os.path.exists(localtheme):
            print('local theme path found')
            self.data.local_theme = 'Link to %s_theme'% self.skinname
            # make ~/.themes - quietly ignore the error if it exists
            try:
                os.makedirs(userthemedir)
            except OSError as exception:
                if exception.errno != errno.EEXIST:
                    raise
            # create systemlink because one can't store themes in an arbitrary folder.
            if not os.path.exists(userthemedir+'/%s'%self.data.local_theme):
                os.symlink(localtheme,userthemedir+'/%s'%self.data.local_theme)
            settings = Gtk.Settings.get_default()
            settings.set_string_property("gtk-theme-name", self.data.local_theme, "")
        else:
            self.data.local_theme = None

        # jogging increments
        increments = self.inifile.find("DISPLAY", "INCREMENTS")
        if increments:
            if "," in increments:
                self.data.jog_increments = [i.strip() for i in increments.split(",")]
            else:
                self.data.jog_increments = increments.split()
            if not "continuous" in increments.lower():
                self.data.jog_increments += ["continuous"]
        else:
            if self.machine_units_mm ==self.data._MM:
                self.data.jog_increments = [".001 mm",".01 mm",".1 mm","1 mm","continuous"]
            else:
                self.data.jog_increments = [".0001 in",".001 in",".01 in",".1 in","continuous"]
            self.add_alarm_entry(_("No default jog increments entry found in [DISPLAY] of INI file"))

        # angular jogging increments
        increments = self.inifile.find("DISPLAY", "ANGULAR_INCREMENTS")
        if increments:
            if "," in increments:
                self.data.angular_jog_increments = [i.strip() for i in increments.split(",")]
            else:
                self.data.angular_jog_increments = increments.split()
            if not "continuous" in increments.lower():
                self.data.angular_jog_increments += ["continuous"]
        else:
            self.data.angular_jog_increments = ["1","45","180","360","continuous"]
            self.add_alarm_entry(_("No default angular jog increments entry found in [DISPLAY] of INI file"))

        # set default jog rate
        # must convert from INI's units per second to gscreen's units per minute
        temp = self.inifile.find("DISPLAY","DEFAULT_LINEAR_VELOCITY")
        if temp:
            temp = float(temp)*60
        else:
            temp = self.data.jog_rate
            self.add_alarm_entry(_("No DEFAULT_LINEAR_VELOCITY entry found in [DISPLAY] of INI file: using internal default of %s"%temp))
        self.data.jog_rate = float(temp)
        self.emc.continuous_jog_velocity(float(temp),None)

        # set max jog rate
        # must convert from INI's units per second to gscreen's units per minute
        temp = self.inifile.find("DISPLAY","MAX_LINEAR_VELOCITY")
        if temp:
            temp = float(temp)*60
        else:
            temp = self.data.jog_rate_max
            self.add_alarm_entry(_("No MAX_LINEAR_VELOCITY entry found in [DISPLAY] of INI file: using internal default of %s"%temp))
        self.data.jog_rate_max = float(temp)

        # max velocity settings: more then one place to check
        # This is the maximum velocity of the machine
        temp = self.inifile.find("TRAJ","MAX_LINEAR_VELOCITY")
        if temp == None:
            self.add_alarm_entry(_("No MAX_LINEAR_VELOCITY found in [TRAJ] of the INI file"))
            temp = 1.0
        self.data._maxvelocity = float(temp)

        # look for angular defaults if there is angular axis
        if "a" in self.data.axis_list or "b" in self.data.axis_list or "c" in self.data.axis_list:
            # set default angular jog rate
            # must convert from INI's units per second to gscreen's units per minute
            temp = self.inifile.find("DISPLAY","DEFAULT_ANGULAR_VELOCITY")
            if temp:
                temp = float(temp)*60
            else:
                temp = self.data.angular_jog_rate
                self.add_alarm_entry(_("No DEFAULT_ANGULAR_VELOCITY entry found in [DISPLAY] of INI file: using internal default of %s"%temp))
            self.data.angular_jog_rate = float(temp)
            self.emc.continuous_jog_velocity(None,float(temp))

            # set default angular jog rate
            # must convert from INI's units per second to gscreen's units per minute
            temp = self.inifile.find("DISPLAY","MAX_ANGULAR_VELOCITY")
            if temp:
                temp = float(temp)*60
            else:
                temp = self.data.angular_jog_rate_max
                self.add_alarm_entry(_("No MAX_ANGULAR_VELOCITY entry found in [DISPLAY] of INI file: using internal default of %s"%temp))
            self.data.angular_jog_rate_max = float(temp)

        # check for override settings
        temp = self.inifile.find("DISPLAY","MAX_SPINDLE_OVERRIDE")
        if temp:
            self.data.spindle_override_max = float(temp)
        else:
            self.add_alarm_entry(_("No MAX_SPINDLE_OVERRIDE entry found in [DISPLAY] of INI file"))

        temp = self.inifile.find("DISPLAY","MIN_SPINDLE_OVERRIDE")
        if temp:
            self.data.spindle_override_min = float(temp)
        else:
            self.add_alarm_entry(_("No MIN_SPINDLE_OVERRIDE entry found in [DISPLAY] of INI file"))

        temp = self.inifile.find("DISPLAY","MAX_FEED_OVERRIDE")
        if temp:
            self.data.feed_override_max = float(temp)
        else:
            self.add_alarm_entry(_("No MAX_FEED_OVERRIDE entry found in [DISPLAY] of INI file"))

        # if it's a lathe config, set the tooleditor style 
        self.data.lathe_mode = bool(self.inifile.find("DISPLAY", "LATHE"))
        if self.data.lathe_mode:
            self.add_alarm_entry(_("This screen will be orientated for Lathe options"))

        # get the path to the tool table
        self.data.tooltable = self.inifile.find("EMCIO","TOOL_TABLE")

        # see if the user specified a tool editor
        self.data.tooleditor = self.inifile.find("DISPLAY","TOOL_EDITOR")

        # see if the user specified a tool editor
        self.data.varfile = self.inifile.find("RS274NGC","PARAMETER_FILE")

        if "initialize_keybindings" in dir(self.handler_instance):
            self.handler_instance.initialize_keybindings()
        else:
            self.initialize_keybindings()

        # TODO the user should be able to invoke this so they know what methods are available
        # and what handlers are registered
        #print handlers
        if "initialize_pins" in dir(self.handler_instance):
            self.handler_instance.initialize_pins()
        else:
            self.initialize_pins()

        if "initialize_manual_toolchange" in dir(self.handler_instance):
            self.handler_instance.initialize_manual_toolchange()
        else:
            self.initialize_manual_toolchange()

        if "connect_signals" in dir(self.handler_instance):
            self.handler_instance.connect_signals(handlers)
        else:
            self.connect_signals(handlers)

        # Set up the widgets
        if "initialize_widgets" in dir(self.handler_instance):
            self.handler_instance.initialize_widgets()
        else:
            self.initialize_widgets()

        # see if there are user messages in the INI file 
        self.message_setup()

        # ok everything that might make HAL pins should be done now - let HAL know that
        self.halcomp.ready()
        try:
            self.widgets._terminal.feed_child('halcmd show pin gscreen\n') 
        except Exception as e:
            print("Exception feeding terminal", e)
            pass

        # timers for display updates
        temp = self.inifile.find("DISPLAY","CYCLE_TIME")
        if not temp:
            self.add_alarm_entry(_("CYCLE_TIME in [DISPLAY] of INI file is missing: defaulting to 100ms"))
            temp = 100
        elif float(temp) < 50:
            self.add_alarm_entry(_("CYCLE_TIME in [DISPLAY] of INI file is too small: defaulting to 100ms"))
            temp = 100
        print(_("timeout %d" % int(temp)))
        if "timer_interrupt" in dir(self.handler_instance):
            GLib.timeout_add(int(temp), self.handler_instance.timer_interrupt)
        else:
            GLib.timeout_add(int(temp), self.timer_interrupt)


        # print out gscreen functions and docstrings so users know
        # what is available to them
    def _print_functions(self):
            members = dir(Gscreen)
            #print [(member, getattr(Gscreen, member).__doc__) for member in members],'\n'
            for method in dir( Gscreen ):
                if method[:2] == '__':  # A protected function
                    continue
                if method[:1] == '_':  # A private function
                    continue
                try:
                    meth = getattr( Gscreen, method )
                except:
                    continue
                if not hasattr( meth , '__doc__' )== None:
                    #print help(meth)
                    print(self._get_method_sig(meth))
                    doc = getattr( meth , '__doc__' )

                    if not doc == None:
                        print(doc)
                    print('\n')

    def _get_method_sig(self,method):
        import inspect
        from collections import namedtuple
        DefaultArgSpec = namedtuple('DefaultArgSpec', 'has_default default_value')
    
        def _get_default_arg(args, defaults, arg_index):
            """ Method that determines if an argument has default value or not,
            and if yes what is the default value for the argument
        
            :param args: array of arguments, eg: ['first_arg', 'second_arg', 'third_arg']
            :param defaults: array of default values, eg: (42, 'something')
            :param arg_index: index of the argument in the argument array for which,
            this function checks if a default value exists or not. And if default value
            exists it would return the default value. Example argument: 1
            :return: Tuple of whether there is a default or not, and if yes the default
            value, eg: for index 2 i.e. for "second_arg" this function returns (True, 42)
            """
            if not defaults:
                return DefaultArgSpec(False, None)
        
            args_with_no_defaults = len(args) - len(defaults)
        
            if arg_index < args_with_no_defaults:
                return DefaultArgSpec(False, None)
            else:
                value = defaults[arg_index - args_with_no_defaults]
                if (type(value) is str):
                    value = '"%s"' % value
                return DefaultArgSpec(True, value)
    
    
    
    
        """ Given a function, it returns a string that pretty much looks how the
        function signature would be written in python.
    
        :param method: a python method
        :return: A string similar describing the pythong method signature.
        eg: "my_method(first_argArg, second_arg=42, third_arg='something')"
        """
    
        # The return value of ArgSpec is a bit weird, as the list of arguments and
        # list of defaults are returned in separate array.
        # eg: ArgSpec(args=['first_arg', 'second_arg', 'third_arg'],
        # varargs=None, keywords=None, defaults=(42, 'something'))
        argspec = inspect.getargspec(method)
        arg_index=0
        args = []
    
        # Use the args and defaults array returned by argspec and find out
        # which arguments has default
        for arg in argspec.args:
            default_arg = _get_default_arg(argspec.args, argspec.defaults, arg_index)
            if default_arg.has_default:
                args.append("%s=%s" % (arg, default_arg.default_value))
            else:
                args.append(arg)
            arg_index += 1
        return "%s(%s)" % (method.__name__, ", ".join(args))
    
    def a_dummy_function_for_documentation(self):
        """This is to explain some required defaults.
            Gscreen requires the main window to be called 'window1' in the GLADE editor.
            An optional second main window must be called 'window2' in the GLADE editor.
            A graphics display should be called 'gremlin' in the GLADE editor.
            A MDI window should be called 'hal_mdi_history'
            A gcode display should be called 'gcode_view'
            a statusbar should be called statusbar1
        """
        pass

    def initialize_keybindings(self):
        """ add key press and release events to window1, \n
        call: self.on_key_event(data)
        data is 1 for press
        0 for release
        """
        self.widgets.window1.connect('key_press_event', self.on_key_event,1)
        self.widgets.window1.connect('key_release_event', self.on_key_event,0)
        self.widgets.window1.connect('focus-out-event', self.on_focus_out)


    def initialize_preferences(self):
        """Convenience function, calls separate functions\n
        calls:
        self.init_dro_pref()
        self.init_theme_pref()
        self.init_window_geometry_pref()
        self.init_keybinding_pref()
        self.init_general_pref()
        """
        self.init_dro_pref()
        self.init_theme_pref()
        self.init_window_geometry_pref()
        self.init_keybinding_pref()
        self.init_general_pref()

    def init_dro_pref(self):
        """ Gets DRO colors and show flag from preference file
            it adds them to the self.data class
        """
        self.data.abs_textcolor = self.prefs.getpref('abs_textcolor', '#0000FFFF0000', str)
        self.data.dtg_textcolor = self.prefs.getpref('dtg_textcolor', '#00000000FFFF', str)
        self.data.rel_textcolor = self.prefs.getpref('rel_textcolor', '#FFFF00000000', str)
        self.data.show_dtg = self.prefs.getpref('show_dtg', False, bool)

    def init_theme_pref(self):
        """ assigns the theme name from preference file to self.data.theme_name
        """
        self.data.theme_name = self.prefs.getpref('gtk_theme', 'Redmond', str)

    def init_window_geometry_pref(self):
        """ assigns the window options from preference file to self.data class
        assigns to:
        self.data.fullscreen1
        self.data.use_screen2
        self.data.window_geometry
        self.data.window_max
        self.data.window2_geometry
        self.data.window2_max
        """
        self.data.fullscreen1 = self.prefs.getpref('fullscreen1', False, bool)
        self.data.use_screen2 = self.prefs.getpref('use_screen2', False, bool)
        self.data.window_geometry = self.prefs.getpref('window_geometry', 'default', str)
        self.data.window_max = self.prefs.getpref('window_force_max', False, bool)
        self.data.window2_geometry = self.prefs.getpref('window2_geometry', 'default', str)
        self.data.window2_max = self.prefs.getpref('window2_force_max', False, bool)

    def init_keybinding_pref(self):
        """ adds the default keyboard bindings from the preference file
        This covers jogging, increments, estop,power and abort
        A user can change the preference file entries to change keys
        Right
        Left
        Up
        Down
        Page_Up
        Page_Down
        bracketleft
        bracketright
        i
        I
        F1
        F2
        Escape
        """
        self.keylookup.add_binding('Right', self.prefs.getpref('Key_Right', 'XPOS', str,"KEYCODES"))
        self.keylookup.add_binding('Left', self.prefs.getpref('Key_Left', 'XNEG', str,"KEYCODES"))
        self.keylookup.add_binding('Up', self.prefs.getpref('Key_Up', 'YPOS', str,"KEYCODES"))
        self.keylookup.add_binding('Down', self.prefs.getpref('Key_Down', 'YNEG', str,"KEYCODES"))
        self.keylookup.add_binding('Page_Up', self.prefs.getpref('Key_Page_Up', 'ZPOS', str,"KEYCODES"))
        self.keylookup.add_binding('Page_Down', self.prefs.getpref('Key_Page_Down', 'ZNEG', str,"KEYCODES"))
        self.keylookup.add_binding('bracketleft', self.prefs.getpref('Key_bracketleft', 'APOS', str,"KEYCODES"))
        self.keylookup.add_binding('bracketright', self.prefs.getpref('Key_bracketright', 'ANEG', str,"KEYCODES"))
        self.keylookup.add_binding('i', self.prefs.getpref('Key_i', 'INCREMENTS', str,"KEYCODES"))
        self.keylookup.add_binding('I', self.prefs.getpref('Key_I', 'INCREMENTS', str,"KEYCODES"))
        self.keylookup.add_binding('F1', self.prefs.getpref('Key_F1', 'ESTOP', str,"KEYCODES"))
        self.keylookup.add_binding('F2', self.prefs.getpref('Key_F2', 'POWER', str,"KEYCODES"))
        self.keylookup.add_binding('Escape', self.prefs.getpref('Key_Escape', 'ABORT', str,"KEYCODES"))

    def init_general_pref(self):
        """assigns general options from the preference file
        assigns to:
        self.data.alert_sound
        self.data.desktop_notify
        self.data.diameter_mode
        self.data.display_order
        self.data.dro_units 
        self.data.error_sound
        self.data.error_font_name
        self.data.err_textcolor
        self.data.grid_size
        self.data.hide_cursor
        self.data.plot_view
        self.data.show_offsets
        self.data.spindle_start_rpm
        self.data.unlock_code
        self.data.embedded_keyboard
        """
        self.data.alert_sound = self.prefs.getpref('audio_alert', self.data.alert_sound, str)
        self.data.desktop_notify = self.prefs.getpref('desktop_notify', True, bool)
        self.data.diameter_mode = self.prefs.getpref('diameter_mode', False, bool)
        self.data.display_order = self.prefs.getpref('display_order', (0,1,2), repr)
        self.data.dro_units = self.prefs.getpref('dro_is_metric', False, bool)
        if self.data.dro_units: # set linuxcnc as well
            self.status.dro_mm(0)
        else:
            self.status.dro_inch(0)
        self.data.error_sound = self.prefs.getpref('audio_error', self.data.error_sound, str)
        self.data.error_font_name = self.prefs.getpref('error_font', 'Sans Bold 10', str)
        self.data.err_textcolor = self.prefs.getpref('err_textcolor', 'default', str)
        self.data.grid_size = self.prefs.getpref('grid_size', 1.0 , float)
        self.data.hide_cursor = self.prefs.getpref('hide_cursor', False, bool)
        self.data.plot_view = self.prefs.getpref('view', ("p","x","y","y2","z","z2"), repr)
        self.data.show_offsets = self.prefs.getpref('show_offsets', True, bool)
        self.data.spindle_start_rpm = self.prefs.getpref('spindle_start_rpm', 300 , float)
        self.data.unlock_code = self.prefs.getpref('unlock_code', '123', str)
        self.data.embedded_keyboard = self.prefs.getpref('embedded_keyboard', True, bool)
        if self.prefs.getpref('dro_actual', False, bool):
           self.status.dro_actual(0)
        else:
           self.status.dro_commanded(0)
        # toolsetting reference type
        if self.prefs.getpref('toolsetting_fixture', False, bool):
            self.g10l11 = 1
        else:
            self.g10l11 = 0





    # initialize default widgets
    def initialize_widgets(self):
        """Convenience function, calls separate functions\n
        calls:
        self.init_show_windows()
        self.init_dynamic_tabs()
        self.init_axis_frames()
        self.init_dro_colors()
        self.init_screen2()
        self.init_fullscreen1()
        self.init_gremlin()
        self.init_manual_spindle_controls()
        self.init_dro()
        self.init_audio()
        self.init_desktop_notify()
        self.init_statusbar()
        self.init_entry()
        self.init_tooleditor()
        self.init_offsetpage()
        self.init_embeded_terminal()
        self.init_themes()
        self.init_screen1_geometry()
        self.init_running_options()
        self.init_mode()
        self.init_sensitive_on_off()
        self.init_sensitive_run_idle()
        self.init_sensitive_all_homed()
        self.init_sensitive_edit_mode()
        self.init_sensitive_override_mode()
        self.init_sensitive_graphics_mode()
        self.init_sensitive_origin_mode()
        self.init_hide_cursor()
        self.init_state()
        """
        self.init_show_windows()
        self.init_dynamic_tabs()
        self.init_axis_frames()
        self.init_dro_colors()
        self.init_screen2()
        self.init_fullscreen1()
        self.init_gremlin()
        self.init_manual_spindle_controls()
        self.init_dro()
        self.init_audio()
        self.init_desktop_notify()
        self.init_statusbar()
        self.init_entry()
        self.init_tooleditor()
        self.init_offsetpage()
        self.init_embeded_terminal()
        self.init_themes()
        self.init_screen1_geometry()
        self.init_running_options()
        self.init_mode()
        self.init_sensitive_on_off()
        self.init_sensitive_run_idle()
        self.init_sensitive_all_homed()
        self.init_sensitive_edit_mode()
        self.init_sensitive_override_mode()
        self.init_sensitive_graphics_mode()
        self.init_sensitive_origin_mode()
        self.init_hide_cursor()

        self.init_state()


    def show_try_errors(self):
        """ Gscreen uses try/except a lot to not show errors if a user deletes/renames a widget
        But this makes it hard to see real errors,
        so in debug mode
        we print all those errors.
        use:
        try:
            your function
        except:
            self.gscreen.show_try_errors()
        """
        global verbose_debug
        if verbose_debug:
            exc_type, exc_value, exc_traceback = sys.exc_info()
            formatted_lines = traceback.format_exc().splitlines()
            print()
            print("****Gscreen verbose debugging:",formatted_lines[0])
            traceback.print_tb(exc_traceback, limit=1, file=sys.stdout)
            print(formatted_lines[-1])

    def verbosely_print(self,data):
        """Used to print info only if in verbose mode
        """
        global verbose_debug
        if verbose_debug:
            print(data)

    def init_axis_frames(self):
        """ This show/hides axis DRO frames for used/unused axes
            axes frames must be called (eg) 'frame_x' in glade file.
            It also will try to show angular axes controls if there
            are rotary axes selected.
            it will try to show these widgets:
            self.widgets.button_select_rotary_adjust.show()
            self.widgets.angular_jog_increments.show()
            self.widgets.angular_jog_rate.show()
            if there are not available it will not error.
        """
        for letter in ('x','y','z','a','b','c','u','v','w'):
            try:
                frame_for_letter = eval("self.widgets." + 'frame_' + letter)
            except:
                self.show_try_errors()
                continue
            if letter in self.data.axis_list:
                frame_for_letter.show()
                # don't show image6 when axes other than xyz are present
                if letter in ('a','b','c','u','v','w'):
                    self.widgets.image6.hide() ;# make more room for axis display
            else:
                # hide unneeded frames for axes not in use
                frame_for_letter.hide() ;# frame not relevant
        if self.data.rotary_joints:
            try:
                self.widgets.button_select_rotary_adjust.show()
                self.widgets.angular_jog_increments.show()
                self.widgets.angular_jog_rate.show()
            except:
                self.show_try_errors()

    def init_dynamic_tabs(self):
        """ add external programs to tabs as per INI file settings
        """
        # dynamic tabs setup
        self._dynamic_childs = {}
        atexit.register(self.kill_dynamic_childs)
        self.set_dynamic_tabs()

    def init_dro_colors(self):
        """sets the widgets DRO color selection button from the data class
            for each DRO type.
            self.widgets.abs_colorbutton
            self.widgets.rel_colorbutton
            self.widgets.dtg_colorbutton
            then sets the DRO widgets to those colors.
            calls:
            self.set_abs_color()
            self.set_rel_color()
            self.set_dtg_color()
            Not all screens use these widgets
        """


        self.widgets.abs_colorbutton.set_color(Gdk.color_parse(self.data.abs_textcolor))
        self.set_abs_color()
        self.widgets.rel_colorbutton.set_color(Gdk.color_parse(self.data.rel_textcolor))
        self.set_rel_color()
        self.widgets.dtg_colorbutton.set_color(Gdk.color_parse(self.data.dtg_textcolor))
        self.set_dtg_color()

    def init_screen2(self):
        """Sets the button that selects the optional second window visibility
            the second window is meant to be placed on a second monitor
        """
        self.widgets.use_screen2.set_active(self.data.use_screen2)

    def init_fullscreen1(self):
        """ Sets the button that selects the screen to use whole screen with no border panels
        """
        self.widgets.fullscreen1.set_active(self.data.fullscreen1)

    def init_gremlin(self):
        """ initializes the plot screen options from the data class
            expects the plot widget to be called gremlin
        """ 
        self.widgets.show_offsets.set_active( self.data.show_offsets )
        self.widgets.gremlin.show_offsets = self.data.show_offsets
        self.widgets.grid_size.set_value(self.data.grid_size)
        self.widgets.gremlin.grid_size = self.data.grid_size
        self.widgets.gremlin.set_property('view',self.data.plot_view[0])
        self.widgets.gremlin.set_property('metric_units',(self.data.dro_units == self.data._MM))

    def init_manual_spindle_controls(self):
        """ set spindle default start rpm
            set spindle control widgets to correspond to data class 
        """
        self.widgets.spindle_start_rpm.set_value(self.data.spindle_start_rpm)
        self.block("s_display_fwd")
        self.widgets.s_display_fwd.set_active(True)
        self.unblock("s_display_fwd")
        self.preset_spindle_speed(self.data.spindle_start_rpm)

    def init_dro(self):
        """ set dro widgets diameter_mode and dro_units as pe data class
        """
        self.widgets.diameter_mode.set_active(self.data.diameter_mode)
        self.widgets.dro_units.set_active(self.data.dro_units)

    def init_audio(self):
        """preselect ausio alert and error sounds as per data class
        """
        self.widgets.audio_alert_chooser.set_filename(self.data.alert_sound)
        self.widgets.audio_error_chooser.set_filename(self.data.error_sound)

    def init_desktop_notify(self):
        """set desktop_notify widget active as per data class
        """
        self.widgets.desktop_notify.set_active(self.data.desktop_notify)

    def init_statusbar(self):
        """ Preset statusbar with homing message
            expects widget to be named statusbar1
        """
        self.statusbar_id = self.widgets.statusbar1.get_context_id("Statusbar1")
        self.homed_status_message = self.widgets.statusbar1.push(1,_("Ready For Homing"))

    def init_entry(self):
        return

    # first we hide all the axis columns the unhide the ones we want
    # if it's a lathe config we show lathe related columns
    # and we load the tooltable data
    def init_tooleditor(self):
        """hide all the unused axes from tool editor
           set path to tooltable as per data class
           expects widget to be named tooledit1
        """
        self.widgets.tooledit1.set_visible("abcxyzuvwijq",False)
        for axis in self.data.axis_list:
            self.widgets.tooledit1.set_visible("%s"%axis,True)
        if self.data.lathe_mode:
            self.widgets.tooledit1.set_visible("ijq",True)
        path = os.path.join(CONFIGPATH,self.data.tooltable)
        self.widgets.tooledit1.set_filename(path)

    # Only show the rows of the axes we use
    # set the var path so offsetpage can fill in all the user system offsets
    def init_offsetpage(self):
        """hide all unused axes from offset page
           set path to the variable file
           expects widgets to be named offsetpage1
        """
        self.widgets.offsetpage1.set_col_visible('xyzabcuvw',False)
        temp =""
        for axis in self.data.axis_list:
            temp=temp+axis
        self.widgets.offsetpage1.set_col_visible(temp,True)
        path = os.path.join(CONFIGPATH,self.data.varfile)
        self.widgets.offsetpage1.set_filename(path)

    def init_embeded_terminal(self):
        """add a terminal window
           expects widget to be called terminal_window
           widget usually is a scrolled window widget
        """
        # add terminal window
        try:
            self.widgets._terminal = vte.Terminal ()
            self.widgets._terminal.connect ("child-exited", lambda term: Gtk.main_quit())
            self.widgets._terminal.fork_command()
            self.widgets._terminal.show()
            window = self.widgets.terminal_window.add(self.widgets._terminal)
            self.widgets.terminal_window.connect('delete-event', lambda window, event: Gtk.main_quit())
            self.widgets.terminal_window.show()
        except:
            print (_("**** WARNING GSCREEN: could not initialize vte terminal - is package vte installed? Is widget: terminal_window in GLADE file?"))

    def init_themes(self):
        """adds theme names to comdo box
           expects combo widget to be named 'theme_choice'
           sets theme to either local theme (theme in config file) or
           to theme set in data class
           otherwise it follows the system theme
        """
        # If there are themes then add them to combo box
        model = self.widgets.theme_choice.get_model()
        model.clear()
        # add the default system theme
        model.append((_("Follow System Theme"),))
        # if there is a local custom theme add it
        if self.data.local_theme:
            model.append((_("Local Config Theme"),))
        themes = []
        # add user themes
        if os.path.exists(userthemedir):
            names = os.listdir(userthemedir)
            names.sort()
            for dirs in names:
                try:
                    sbdirs = os.listdir(os.path.join(userthemedir, dirs))
                    if 'gtk-2.0' in sbdirs:
                        themes.append(dirs)
                except:
                    pass
        # add system themes
        if os.path.exists(themedir):
            names = os.listdir(themedir)
            names.sort()
            for dirs in names:
                try:
                    sbdirs = os.listdir(os.path.join(themedir, dirs))
                    if 'gtk-2.0' in sbdirs:
                        themes.append(dirs)
                except:
                    pass
        # add names to the combobox model
        temp = 0
        for index,theme in enumerate(themes):
            model.append((theme,))
            if theme == self.data.theme_name:
                temp = index+1
        self.widgets.theme_choice.set_active(temp)

        # set combobox selection and use new theme
        if self.data.local_theme is not None:
            self.widgets.theme_choice.set_active(1)
            self.data.theme_name = self.data.local_theme
        else:
            self.data.theme_name = "Follow System Theme"
        settings = Gtk.Settings.get_default()
        if not self.data.theme_name == "Follow System Theme":
            settings.set_string_property("gtk-theme-name", self.data.theme_name, "")

    def init_screen1_geometry(self):
        """set geometry of window as per data class
           expecta window widget to be called window1
        """
        # maximize window or set geometry and optionally maximize 
        if "max" in self.data.window_geometry:
            self.widgets.window1.maximize()
        elif self.data.window_geometry == "default":
            self.show_try_errors()
        else:
            good = self.widgets.window1.parse_geometry(self.data.window_geometry)
            if self.data.window_max:
               self.widgets.window1.maximize()
            if not good:
                print(_("**** WARNING GSCREEN: could not understand the window geometry info in hidden preference file"))
        if self.widgets.fullscreen1.get_active():
            self.widgets.window1.fullscreen()

    def init_running_options(self):
        """set button widgets and linuxcnc for block delete and optional stop
           expects buttons widgets to be called button_block_delete and button_optional_stop
        """
        self.widgets.button_block_delete.set_active(self.prefs.getpref('blockdel', False))
        self.emc.blockdel(self.data.block_del)
        self.widgets.button_option_stop.set_active(self.prefs.getpref('opstop', False))
        self.emc.opstop(self.data.op_stop)

    def init_hide_cursor(self):
        """set hide cursor button as per data class
           set pointer on window to correspond
           set plotter to use touch screen type controls
           expects window to be called window1
           expects plot to be called gremlin
        """
        self.widgets.hide_cursor.set_active(self.data.hide_cursor)
        # hide cursor if requested
        # that also sets the graphics to use touchscreen controls
        if self.data.hide_cursor:
            #self.widgets.window1.window.set_cursor(INVISABLE)
            self.widgets.window1.get_window().set_cursor(INVISABLE)
            self.widgets.gremlin.set_property('use_default_controls',False)
        else:
            #self.widgets.window1.window.set_cursor(None)
            self.widgets.window1.get_window().set_cursor(None)
            self.widgets.gremlin.set_property('use_default_controls',True)

    def init_mode(self):
        """set label of mode button to manual mode
           set linuxcnc to manual mode
           expects button wodget to be called button_mode
        """
        label = self.data.mode_labels
        self.widgets.button_mode.set_label(label[self.data.mode_order[0]])
        # set to 'manual mode' 
        self.mode_changed(self.data.mode_order[0])

    # buttons that need to be sensitive based on the machine being on or off
    def init_sensitive_on_off(self):
        """creates a list of widgets that need to be sensitive to machine on/off
           list is held in data.sensitive_on_off
        """
        self.data.sensitive_on_off = ["vmode0","mode0","mode1","button_homing","button_override","button_graphics","frame_s","button_mode","button_restart"]
        for axis in self.data.axis_list:
            self.data.sensitive_on_off.append("axis_%s"% axis)

    # buttons that need to be sensitive based on the interpreter running or being idle
    def init_sensitive_run_idle(self):
        """creates a list of widgets that need to be sensitive to interpreter run/idle
           list is held in data.sensitive_run/idle
        """
        self.data.sensitive_run_idle = ["button_edit","button_load","button_mode","button_restart"]
        for axis in self.data.axis_list:
            self.data.sensitive_run_idle.append("axis_%s"% axis)

    def init_sensitive_all_homed(self):
        """creates a list of widgets that need to be sensitive to all homed
           list is held in data.sensitive_all_homed
        """
        self.data.sensitive_all_homed = ["button_zero_origin","button_offset_origin","button_select_system","button_tool_set"]

    def init_sensitive_edit_mode(self):
        """creates a list of widgets that need to be sensitive to edit mode
           list is held in data.sensitive_edit_mode
        """
        self.data.sensitive_edit_mode = ["button_mode","button_menu","button_graphics","button_override","button_restart",
            "button_single_step","button_run","ignore_limits"]

    def init_sensitive_override_mode(self):
        """creates a list of widgets that need to be sensitive to override mode
           list is held in data.sensitive_override_mode
        """
        self.data.sensitive_override_mode = ["spindle_preset","spindle_control","spindle_increase","spindle_decrease","s_display_fwd",
            "s_display_rev","button_graphics","button_homing","button_mode","button_jog_mode","button_flood_coolant",
                "button_mist_coolant","button_tool_editor","button_tool_set"]
        for axis in self.data.axis_list:
            self.data.sensitive_override_mode.append("axis_%s"% axis)

    def init_sensitive_graphics_mode(self):
        """creates a list of widgets that need to be sensitive to graphics mode
           list is held in data.sensitive_graphics_mode
        """
        self.data.sensitive_graphics_mode = ["button_override","button_homing","button_mode",
              "button_zero_origin","button_offset_origin","button_plus","button_minus","vmode0","button_tool_set"]
        for axis in self.data.axis_list:
            self.data.sensitive_graphics_mode.append("axis_%s"% axis)

    def init_sensitive_origin_mode(self):
        """creates a list of widgets that need to be sensitive to origin mode
           list is held in data.sensitive_origin_mode
        """
        self.data.sensitive_origin_mode = ["button_override","button_graphics","button_homing","button_mode",
                "button_zero_origin","button_offset_origin","button_jog_mode","button_flood_coolant","button_mist_coolant","button_tool_editor","button_tool_set"]
        for axis in self.data.axis_list:
            self.data.sensitive_origin_mode.append("axis_%s"% axis)

    # this needs to be last as it causes methods to be called (eg to sensitize buttons)
    def init_state(self):
        """Sets the default state of:
            jog increments, 
            angular_jog increments
            calls hal_status to update it's internal state.
            hides the search box
            If any of these widgets are missing there will be no error
            adds power up message to alarm_entry
        """
        for num,i in enumerate(self.data.jog_increments):
            if i == "continuous": break
        self.data.current_jogincr_index = num
        try:
            jogincr = self.data.jog_increments[self.data.current_jogincr_index]
            self.widgets.jog_increments.set_text(jogincr)
        except:
            self.show_try_errors()
        try:
            for num,i in enumerate(self.data.angular_jog_increments):
                if i == "continuous": break
            self.data.current_angular_jogincr_index = num
            jogincr = self.data.angular_jog_increments[self.data.current_angular_jogincr_index]
            self.widgets.angular_jog_increments.set_text(jogincr)
        except:
            self.show_try_errors()
        self.on_hal_status_state_off(None)
        try:
            self.widgets.search_box.hide()
        except:
            self.show_try_errors()
        self.add_alarm_entry(_("Control powered up and initialized"))

    def init_show_windows(self):
        """set title of window to skinname
           show window1 and optional window2 (if selected to)
        """
        # set title and display everything including the second screen if requested
        if self.skinname == "gscreen":
            title = "Gscreen"
        else:
            title = "Gscreen-%s"% self.skinname
        self.widgets.window1.set_title("%s for linuxcnc"% title)
        if self.screen2:
            self.widgets.window2.show()
            self.widgets.window2.move(0,0)
            if not self.data.use_screen2:
                self.widgets.window2.hide()
        self.widgets.window1.show()

    def init_unlock_code(self):
        """set unlock code from data class
           expects widget to be called unlock_number
        """
        print("unlock code #",int(self.data.unlock_code))
        self.widgets.unlock_number.set_value(int(self.data.unlock_code))

    # general call to initialize HAL pins
    # select this if you want all the default pins or select each call for 
    # which ones you want
    def initialize_pins(self):
        """convenience function that calls all default functions for HAL pins
           calls:
        self.init_spindle_pins()
        self.init_coolant_pins()
        self.init_jog_pins()
        self.init_override_pins()
        self.init_control_pins()
        """
        self.init_spindle_pins()
        self.init_coolant_pins()
        self.init_jog_pins()
        self.init_override_pins()
        self.init_control_pins()

    def init_spindle_pins(self):
        """creates a HAL float in pin for control the spindle readout meter
        """
        self.halcomp.newpin("spindle-readout-in", hal.HAL_FLOAT, hal.HAL_IN)

    def init_coolant_pins(self):
        """create HAL BIT out pins to control coolant
        """
        self.halcomp.newpin("aux-coolant-m7-out", hal.HAL_BIT, hal.HAL_OUT)
        self.halcomp.newpin("aux-coolant-m8-out", hal.HAL_BIT, hal.HAL_OUT)
        self.halcomp.newpin("mist-coolant-out", hal.HAL_BIT, hal.HAL_OUT)
        self.halcomp.newpin("flood-coolant-out", hal.HAL_BIT, hal.HAL_OUT)

    def init_jog_pins(self):
        """create HAL BIT out pins for all axis jog enable 
           create HAL BIT out for jog mode enabled
           create HAL FLOAT out pin for current jog increment
           These could be used for MPG selecting 
        """
        for axis in self.data.axis_list:
            self.halcomp.newpin("jog-enable-%s-out"% (axis), hal.HAL_BIT, hal.HAL_OUT)
        self.halcomp.newpin("jog-enable-out", hal.HAL_BIT, hal.HAL_OUT)
        self.halcomp.newpin("jog-increment-out", hal.HAL_FLOAT, hal.HAL_OUT)
        #self.data['jog-increment-in'] = hal_glib.GPin(self.halcomp.newpin('jog-increment-in', hal.HAL_S32, hal.HAL_IN))
        #self.data['jog-increment-in'].connect('value-changed', self.on_hal_jog_increments_changed)
        #self.data['jog-rate-in'] = hal_glib.GPin(self.halcomp.newpin('jog-rate-in', hal.HAL_S32, hal.HAL_IN))
        #self.data['jog-rate-in'].connect('value-changed', self.on_hal_jog_rate_changed)

    # pins used for selecting an encoder to adjust overrides
    def init_override_pins(self):
        """creates HAL BIT pins for spindle,feed and Max velocity overrides.
           used as selection pins for an encoder to set values
        """
        self.halcomp.newpin("s-override-enable-out", hal.HAL_BIT, hal.HAL_OUT)
        self.halcomp.newpin("f-override-enable-out", hal.HAL_BIT, hal.HAL_OUT)
        self.halcomp.newpin("mv-override-enable-out", hal.HAL_BIT, hal.HAL_OUT)

    def init_control_pins(self):
        """Creates and registers function calls for start,abort and feed_hold pins
            calls self.on_cycle_start_changed, self.on_abort_changed, self.on_feed_hold_changed
        """
        self.data['cycle_start'] = hal_glib.GPin(self.halcomp.newpin('cycle-start', hal.HAL_BIT, hal.HAL_IN))
        self.data['cycle_start'].connect('value-changed', self.on_cycle_start_changed)
        self.data['abort'] = hal_glib.GPin(self.halcomp.newpin('abort', hal.HAL_BIT, hal.HAL_IN))
        self.data['abort'].connect('value-changed', self.on_abort_changed)
        self.data['feed_hold'] = hal_glib.GPin(self.halcomp.newpin('feed-hold', hal.HAL_BIT, hal.HAL_IN))
        self.data['feed_hold'].connect('value-changed', self.on_feed_hold_changed)

    def initialize_manual_toolchange(self):
        """Creates pins and registers function calls for manual tool changes:
        tool-number
        tool-changed
        change-tool 
        change_tool either calls on_tool_change from the handler file (if present)
        or the default function
        """
        # for manual tool change dialog
        self.halcomp.newpin("tool-number", hal.HAL_S32, hal.HAL_IN)
        self.halcomp.newpin("tool-changed", hal.HAL_BIT, hal.HAL_OUT)
        self.data['change-tool'] = hal_glib.GPin(self.halcomp.newpin('change-tool', hal.HAL_BIT, hal.HAL_IN))
        # you can override manual tool change
        if "on_tool_change" in dir(self.handler_instance):
            self.data['change-tool'].connect('value-changed', self.handler_instance.on_tool_change)
        else:
            self.data['change-tool'].connect('value-changed', self.on_tool_change)

# *** GLADE callbacks ****

    def on_keycall_ABORT(self,state,SHIFT,CNTRL,ALT):
        """Calls a gladevcp hal action to abort a linuxcnc run.
           action widget is assumed to be named hal_action_stop.
           The action will emit signal 'activate'
           This is part of the default key call routine
        """
        if state: # only activate when pushed not when released
            self.widgets.hal_action_stop.emit("activate")
            return True
    def on_keycall_ESTOP(self,state,SHIFT,CNTRL,ALT):
        """Calls a gladevcp toggle button to estop linuxcnc.
           button widget is assumed to be named button_estop
           The button will emit signal 'clicked'
           This is part of the default key call routine
        """
        if state:
            self.widgets.button_estop.emit('clicked')
            return True
    def on_keycall_POWER(self,state,SHIFT,CNTRL,ALT):
        """Calls a gladevcp toggle button to power linuxcnc.
           button widget is assumed to be named button_estop
           The button will emit signal 'clicked'
           This is part of the default key call routine
        """
        if state:
            self.widgets.button_machine_on.emit('clicked')
            return True
    def on_keycall_XPOS(self,state,SHIFT,CNTRL,ALT):
        """This calls check_mode() for manual mode
           if in manual mode, jogs X axis positively
           by calling do_key_jog()
           It will either start or stop the jog based on 'state'
        """
        if self.data._MAN in self.check_mode(): # manual mode required
            self.do_key_jog(_X,1,state)
            return True
    def on_keycall_XNEG(self,state,SHIFT,CNTRL,ALT):
        """This calls check_mode() for manual mode
           if in manual mode, jogs X axis negatively
           by calling do_key_jog()
           It will either start or stop the jog based on 'state'
        """
        if self.data._MAN in self.check_mode(): # manual mode required
            self.do_key_jog(_X,0,state)
            return True
    def on_keycall_YPOS(self,state,SHIFT,CNTRL,ALT):
        """This calls check_mode() for manual mode
           if in manual mode, jogs Y axis positively
           by calling do_key_jog()
           It will either start or stop the jog based on 'state'
        """
        if self.data._MAN in self.check_mode(): # manual mode required
            self.do_key_jog(_Y,1,state)
            return True
    def on_keycall_YNEG(self,state,SHIFT,CNTRL,ALT):
        """This calls check_mode() for manual mode
           if in manual mode, jogs Y axis negatively
           by calling do_key_jog()
           It will either start or stop the jog based on 'state'
        """
        if self.data._MAN in self.check_mode(): # manual mode required
            self.do_key_jog(_Y,0,state)
            return True
    def on_keycall_ZPOS(self,state,SHIFT,CNTRL,ALT):
        """This calls check_mode() for manual mode
           if in manual mode, jogs Z axis positively
           by calling do_key_jog()
           It will either start or stop the jog based on 'state'
        """
        if self.data._MAN in self.check_mode(): # manual mode required
            self.do_key_jog(_Z,1,state)
            return True
    def on_keycall_ZNEG(self,state,SHIFT,CNTRL,ALT):
        """This calls check_mode() for manual mode
           if in manual mode, jogs Z axis negatively
           by calling do_key_jog()
           It will either start or stop the jog based on 'state'
        """
        if self.data._MAN in self.check_mode(): # manual mode required
            self.do_key_jog(_Z,0,state)
            return True
    def on_keycall_APOS(self,state,SHIFT,CNTRL,ALT):
        """This calls check_mode() for manual mode
           if in manual mode, jogs A axis positively
           by calling do_key_jog()
           It will either start or stop the jog based on 'state'
        """
        if self.data._MAN in self.check_mode(): # manual mode required
            self.do_key_jog(_A,1,state)
            return True
    def on_keycall_ANEG(self,state,SHIFT,CNTRL,ALT):
        """This calls check_mode() for manual mode
           if in manual mode, jogs A axis negatively
           by calling do_key_jog()
           It will either start or stop the jog based on 'state'
        """
        if self.data._MAN in self.check_mode(): # manual mode required
            self.do_key_jog(_A,0,state)
            return True
    def on_keycall_INCREMENTS(self,state,SHIFT,CNTRL,ALT):
        """This calls check_mode() for manual mode
           if in manual mode, it will increase or decrease jog increments
           by calling set_jog_increments(index_dir = )
           It will ether increase or decrease the increments based on 'SHIFT'
        """
        if state and self.data._MAN in self.check_mode(): # manual mode required
            if SHIFT:
                self.set_jog_increments(index_dir = -1)
            else:
                self.set_jog_increments(index_dir = 1)
            return True

    def on_keycall_(self,state,SHIFT,CNTRL,ALT):
        if self.data._MAN in self.check_mode(): # manual mode required
            pass
            return True

    def on_button_spindle_controls_clicked(self,widget):
        """This calls spindle_dialog()
           Which will launch a spindle control dialog
        """
        self.spindle_dialog()

    def on_button_select_rotary_adjust_clicked(self,widget):
        """This sets the angular_jog adjustment flag
            then jog adjustment changes will adjust angular rather then linear rates.
            This is a callback function from a widget.
            The widget can be called anything but
            must have an active state such as a toggle button.
        """
        self.data.angular_jog_adjustment_flag = widget.get_active()
        print(self.data.angular_jog_adjustment_flag)

    def search_fwd(self,widget):
        """causes the Gcode view to search forward for a text string.
            The gcode view widget must be call gcode_view.
            The moxed case option is set by widget 'ignorecase_checkbutton' state
            The search text string is set by text entry widget 'search_entry'.
            This is a callback function called by any named widget
        """
        try:
            CASE = self.widgets.ignorecase_checkbutton.get_active()
        except:
            CASE = True
        self.widgets.gcode_view.text_search(direction=True,mixed_case=CASE,
                                text=self.widgets.search_entry.get_text())

    def search_bwd(self,widget):
        """causes the Gcode view to search backward for a text string.
            The gcode view widget must be call gcode_view.
            The moxed case option is set by widget 'ignorecase_checkbutton' state
            The search text string is set by text entry widget 'search_entry'.
            This is a callback function called by any named widget
        """
        try:
            CASE = self.widgets.ignorecase_checkbutton.get_active()
        except:
            CASE = True
        self.widgets.gcode_view.text_search(direction=False,mixed_case=CASE,
                                text=self.widgets.search_entry.get_text())

    def replace_text(self,widget):
        """causes the Gcode view to search forward for a text string.
            The gcode view widget must be call gcodee_view.
            The mixed case option is set by widget 'ignorecase_checkbutton' state
            The search text string is set by text entry widget 'search_entry'.
            The replace text string is set by text entry widget 'search_entry1'.
            The replace all option is set by widget 'replaceall_checkbutton' state
            This is a callback function called by any named widget
        """
        try:
            CASE = self.widgets.ignorecase_checkbutton.get_active()
        except:
            CASE = True
        try:
            RE_ALL = self.widgets.replaceall_checkbutton.get_active()
        except:
            RE_ALL = False
        self.widgets.gcode_view.replace_text_search(direction=True,mixed_case=CASE,
                                text=self.widgets.search_entry.get_text(),re_text=self.widgets.search_entry1.get_text(),
                                replace_all=RE_ALL)

    def undo_edit(self,widget):
        """This will undo one level of change in the gcode_view.
            This is a callback function, called by any named widget.
            The gcode view must be called gcode_view. 
        """
        self.widgets.gcode_view.undo()

    def redo_edit(self,widget):
        """This will redo one level of change in the gcode_view.
            This is a callback function, called by any named widget.
            The gcode view must be called gcode_view. 
        """
        self.widgets.gcode_view.redo()

    def keypress(self,accelgroup, acceleratable, accel_key, accel_mods):
        print (Gtk.accelerator_name(accel_key,accel_mods),acceleratable,accel_mods)
        return True

    def on_key_event(self,widget, event,state):
        """This catches all key events for Gscreen.
            if will ignore the initial press of shift keys.
            The last key press and its state is help in data.key_event_last.
            This will call a key lookup function that returns a function name.
            then that function is called with the key state info attached.
            If there is a function named in the handler file it will be called
            instead of the default function.
            Setting Gscreen in verbose mode will show key presses / state.
            Any errors in the key look up or function calls are trapped and ignored.
            Setting Gscreen into debug mode will show the errors.
        """
        CNTRL = SHIFT = ALT = 0
        keyname = Gdk.keyval_name(event.keyval)
        self.verbosely_print("Key %s (%d) was pressed state: %d last: %s" % (keyname, event.keyval,state, self.data.key_event_last))
        if event.state & Gdk.ModifierType.CONTROL_MASK:
            CNTRL = 1
            self.verbosely_print("Control was being held down")
        if event.state & Gdk.ModifierType.MOD1_MASK:
            ALT = 1
            self.verbosely_print("Alt was being held down")
        if event.state & Gdk.ModifierType.SHIFT_MASK:
            SHIFT = 1
            self.verbosely_print("Shift was being held down")
        if keyname in( "Shift_L","Shift_R"): return True # ignore shift key press
        if self.data.key_event_last[0] == keyname and self.data.key_event_last[1] == state : return True
        self.data.key_event_last = keyname,state
        try:
            method = self.keylookup.convert(keyname)
            if method:
                try:
                    try:
                        return self.handler_instance[method](state,SHIFT,CNTRL,ALT)
                    except:
                        self.show_try_errors()
                        return self.handler_instance.keybindings[method](state,SHIFT,CNTRL,ALT)
                except:
                    self.show_try_errors()
                    return self[method](state,SHIFT,CNTRL,ALT) 
        except:
            self.show_try_errors()

    def on_cycle_start_changed(self,hal_object):
        """This is Gscreen's cycle start HAL pin callback function.
            If Gscreen is in AUTO mode it will cycle start.
            If Gscreen is in MDI mode it will submit the MDI entry.
            GScreen mode is from data.mode_oder[0]
            Requires a run toggle action widget called hal_toogleaction_run
            Requires a MDI widget called hal_mdihistory
            adds button press entries to the alarm page
        """
        print("cycle start change")
        h = self.halcomp
        if not h["cycle-start"]: return
        if self.data.mode_order[0] == self.data._AUTO:
            self.add_alarm_entry(_("Cycle start pressed in AUTO mode"))
            self.widgets.hal_toggleaction_run.emit('activate')
        elif self.data.mode_order[0] == self.data._MDI:
            self.add_alarm_entry(_("Cycle start pressed in MDI mode"))
            self.widgets.hal_mdihistory.submit()

    def on_abort_changed(self,hal_object):
        """This is Gscreen's abort HAL pin callback function.
            Requires a action stop widget called hal_action_stop
        """
        print("abort change")
        h = self.halcomp
        if not h["abort"]: return
        self.widgets.hal_action_stop.emit("activate")

    def on_feed_hold_changed(self,hal_object):
        """This is Gscreen's feedhold HAL pin callback function.
            Requires a toggle action pause widget called hal_action_stop
        """
        print("feed-hold change")
        h = self.halcomp
        self.widgets.hal_toggleaction_pause.set_active(h["feed-hold"])

    # Here we create a manual tool change dialog
    # This can be overridden in a handler file
    def on_tool_change(self,widget):
        """This is a callback function to launch a default manual tool change dialog.
            This also manipulates the tool change pins:
            change-tool
            tool-number
            tool-changed
        """
        h = self.halcomp
        c = h['change-tool']
        n = h['tool-number']
        cd = h['tool-changed']
        print("tool change",c,cd,n)
        if c:
            message =  _("Please change to tool # %s, then click OK."% n)
            self.data.tool_message = self.notify(_("INFO:"),message,None)
            self.warning_dialog(message, True,pinname="TOOLCHANGE")
        else:
            h['tool-changed'] = False

    def on_spindle_speed_adjust(self,widget):
        """ this is a callback function for spindle increase /decrease controls.
            Checks if MDI is busy or in AUTO mode - notifies as info.
            requires calling widget to be call spindle_increase or spindle_decrease.
            calls spindle_adjustment()
        """
        if self.mdi_control.mdi_is_reading():
            self.notify(_("INFO:"),_("Can't start spindle manually while MDI busy"),INFO_ICON)
            return
        elif self.data.mode_order[0] == self.data._AUTO:
            self.notify(_("INFO:"),_("can't start spindle manually in Auto mode"),INFO_ICON)
            return
        if widget == self.widgets.spindle_increase:
            self.spindle_adjustment(True,True)
        elif widget == self.widgets.spindle_decrease:
            self.spindle_adjustment(False,True)

    # start the spindle according to preset rpm and direction buttons, unless interp is busy
    def on_spindle_control_clicked(self,*args):
        """this is a callback function that will start the spindle manually.
            Checks if MDI is busy or in AUTO mode - notifies as info.
            direction is based on state of widget s_display_fwd toggle button.
            speed is based on data.spindle_preset.
            calls adjust_spindle_rpm()
        """
        if self.mdi_control.mdi_is_reading():
            self.notify(_("INFO:"),_("Can't start spindle manually while MDI busy"),INFO_ICON)
            return
        elif self.data.mode_order[0] == self.data._AUTO:
            self.notify(_("INFO:"),_("can't start spindle manually in Auto mode"),INFO_ICON)
            return
        if not self.data.spindle_speed == 0:
            self.emc.spindle_off(1)
            return
        if not self.widgets.s_display_fwd.get_active() and not self.widgets.s_display_rev.get_active():
            self.notify(_("INFO:"),_("No direction selected for spindle"),INFO_ICON)
            return
        if self.widgets.s_display_fwd.get_active():
            self.adjust_spindle_rpm(self.data.spindle_preset,1)
        else:
            self.adjust_spindle_rpm(self.data.spindle_preset,-1)

    # dialog for setting the spindle preset speed
    def on_preset_spindle(self,*args):
        """This is a callback function to launch a spindle preset speed dialog.
        """
        if self.data.preset_spindle_dialog: return
        label = Gtk.Label(_("Spindle Speed Preset Entry"))
        label.modify_font(pango.FontDescription("sans 20"))
        self.data.preset_spindle_dialog = Gtk.Dialog(_("Spindle Speed Preset Entry"),
                   self.widgets.window1,
                   0, destroy_with_parent = True)
        calc = gladevcp.Calculator()
        self.data.preset_spindle_dialog.vbox.pack_start(label, False, False, 0)
        self.data.preset_spindle_dialog.vbox.add(calc)
        calc.set_value("")
        calc.set_property("font","sans 20")
        calc.set_editable(True)
        calc.entry.connect("activate", lambda w : self.data.preset_spindle_dialog.emit('response',Gtk.ResponseType.ACCEPT))
        self.data.preset_spindle_dialog.parse_geometry("400x400")
        self.data.preset_spindle_dialog.set_decorated(False)
        self.data.preset_spindle_dialog.show_all()
        self.data.preset_spindle_dialog.connect("response", self.on_preset_spindle_return,calc)

    def on_preset_spindle_return(self,widget,result,calc):
        """This is a callback from the spindle preset dialog box.
            It calls preset_spindle_speed() with that data from the dialog
        """
        if result == Gtk.ResponseType.ACCEPT:
            data = calc.get_value()
            if data == None:
                return
            self.preset_spindle_speed(data)
        widget.destroy()
        self.data.preset_spindle_dialog = None

    # dialog for manually calling a tool
    def on_index_tool(self,*args):
        """This is a callback to launch a manual toolchange dialog.
        """
        if self.data.index_tool_dialog: return
        self.data.index_tool_dialog = Gtk.Dialog(_("Manual Tool Index Entry"),
                   self.widgets.window1,
                   0, destroy_with_parent = True)
        label = Gtk.Label(_("Manual Tool Index Entry"))
        label.modify_font(pango.FontDescription("sans 20"))
        self.data.index_tool_dialog.vbox.pack_start(label, False, False, 0)
        calc = gladevcp.Calculator()
        self.data.index_tool_dialog.vbox.add(calc)
        calc.set_value("")
        calc.set_property("font","sans 20")
        calc.set_editable(True)
        calc.entry.connect("activate", lambda w : self.data.index_tool_dialog.emit('response',Gtk.ResponseType.ACCEPT))
        calc.integer_entry_only(True)
        calc.num_pad_only(True)
        self.data.index_tool_dialog.parse_geometry("360x400")
        self.data.index_tool_dialog.show_all()
        self.data.index_tool_dialog.connect("response", self.on_index_tool_return,calc)

    def on_index_tool_return(self,widget,result,calc):
        """This is a callback function from the maunal toolchange dialog.
        """
        if result == Gtk.ResponseType.ACCEPT:
            raw = calc.get_value()
            try:
                tool = abs(int((raw)))
                self.mdi_control.index_tool(tool)
            except:
                return
        widget.destroy()
        self.data.index_tool_dialog = None

    def set_grid_size(self,widget):
        """ This is a callback function for setting the graphics display grid size
            requires the graphics display to be called gremlin.
            requires the calling widget to return a float value
            records the preference in the preference file.
        """
        data = widget.get_value()
        self.widgets.gremlin.set_property('grid_size',data)
        self.prefs.putpref('grid_size', data,float)

    # from prefererence page
    def set_spindle_start_rpm(self,widget):
        """This is a callback function to set the preset spindle speed.
            requires the calling widget to return a float value.
            calls preset_spindle_speed() function
        """
        data = widget.get_value()
        self.data.spindle_start_rpm = data
        self.prefs.putpref('spindle_start_rpm', data,float)
        self.preset_spindle_speed(data)

    def update_preview(self,widget):
        """This is a callback function that plays the sound selected.
            Requires the widget to return a filename.
        """
        file = widget.get_filename()
        if file:
            try:
                test = Player()
                test.set_sound(file)
                test.run()
            except:pass

    def change_sound(self,widget,sound):
        """This is a callback function that changes the default sound selected.
            Requires the widget to return a filename.
            records it in the preference file.
        """
        file = widget.get_filename()
        if file:
            self.data[sound+"_sound"] = file
            temp = "audio_"+ sound
            self.prefs.putpref(temp, file, str)

    # manual spindle control
    # TODO fix direct reference just use 'widget'
    def on_s_display_fwd_toggled(self,widget):
        """This is a callback to manually set the spindle fwd.
            If the spindle is running backward it will stop.
            It also toggles the reverse button
        """
        if widget.get_active():
            if self.widgets.s_display_fwd.get_active():
                self.emc.spindle_off(1)
                self.block("s_display_rev")
                self.widgets.s_display_rev.set_active(False)
                self.unblock("s_display_rev")
        else:
            self.block("s_display_fwd")
            widget.set_active(True)
            self.unblock("s_display_fwd")
 
    # manual spindle control
    # TODO fix direct reference just use 'widget'
    def on_s_display_rev_toggled(self,widget):
        """This is a callback to manually set the spindle reverse.
            If the spindle is running forward it will stop.
            it also toggles the fwd button
        """
        if widget.get_active():
            if self.widgets.s_display_fwd.get_active():
                self.emc.spindle_off(1)
                self.block("s_display_fwd")
                self.widgets.s_display_fwd.set_active(False)
                self.unblock("s_display_fwd")
        else:
            self.block("s_display_rev")
            widget.set_active(True)
            self.unblock("s_display_rev")

    # for plot view controls with touchscreen
    def on_eventbox_gremlin_enter_notify_event(self,widget,event):
        """This is a callback function facilitate zoom and rotate with touchscreen.
            Requires graphics plot widget to be called 'gremlin'.
            Requires a graphics selection toggle button 'button_graphics'
            Requires a zoom selection toggle button 'button_zoom'
            Requires a rotate selection toggle button'button_rotate_v'
        """
        if self.widgets.button_graphics.get_active():
            if self.widgets.button_zoom.get_active():
                self.widgets.gremlin.start_continuous_zoom(event.y)
            elif self.widgets.button_rotate_v.get_active():
                self.widgets.gremlin.select_prime(event.x,event.y)
            self.widgets.gremlin.set_mouse_start(event.x,event.y)

    # for plot view controls with touchscreen
    def on_eventbox_gremlin_leave_notify_event(self,widget,event):
        """This is a callback function to facilitate touchscreen controls
        """
        self.widgets.gremlin.select_fire(event.x,event.y)

    # for plot view controls with touchscreen or mouse
    # if using mouse and when in graphics adjustment mode,
    # we don't use mouse controls when we have selected button controls
    def on_gremlin_motion(self,widget,event):
        """This is a callback function to control graphics adjustments using
            a mouse or a touchscreen, with selections from screen buttons.
            Requires graphics display to be called 'gremlin'
            Requires a graphics selection toggle button 'button_graphics'
            Requires a zoom selection toggle button 'button_zoom'
            Requires a pan vertical selection toggle button 'button_pan_v'
            Requires a pan horizontal selection toggle button 'button_pan_h'
            Requires a rotate vertical selection toggle button'button_rotate_v'
            Requires a rotate horixontal selection toggle button'button_rotate_h'
        """
        if self.widgets.button_graphics.get_active():
            self.widgets.gremlin.set_property('use_default_controls',False)
            if self.data.hide_cursor:
                if self.widgets.button_zoom.get_active():
                    self.widgets.gremlin.continuous_zoom(event.y)
                elif self.widgets.button_pan_v.get_active():
                    self.pan(event.x,event.y)
                elif self.widgets.button_pan_h.get_active():
                    self.pan(event.x,event.y)
                elif self.widgets.button_rotate_v.get_active():
                    self.rotate(event.x,event.y)
                elif self.widgets.button_rotate_h.get_active():
                    self.rotate(event.x,event.y)
            elif self.widgets.button_zoom.get_active() or self.widgets.button_pan_v.get_active():
                return
            elif self.widgets.button_pan_h.get_active() or self.widgets.button_rotate_v.get_active():
                return
            elif self.widgets.button_rotate_h.get_active():
                return
            else:
                self.widgets.gremlin.set_property('use_default_controls',True)
        else:
            self.widgets.gremlin.set_property('use_default_controls',not self.data.hide_cursor)

    # display calculator for input
    def launch_numerical_input(self,callback="on_numerical_entry_return",data=None,data2=None,title=_("Entry dialog")):
        """This is a function to launch a numerical entry/calculator dialog.
            The default callback function will be 'on_numerical_entry_return.
            It will check to see if the handler file has this function, otherwise it will use the default.
        """
        if self.data.entry_dialog: return
        label = Gtk.Label(title)
        label.modify_font(pango.FontDescription("sans 20"))
        self.data.entry_dialog = Gtk.Dialog(title,
                   self.widgets.window1,
                   0, destroy_with_parent = True)
        calc = gladevcp.Calculator()
        calc.set_editable(True)
        self.data.entry_dialog.vbox.pack_start(label, False, False, 0)
        self.data.entry_dialog.vbox.add(calc)
        calc.set_value("")
        calc.set_property("font","sans 20")
        calc.entry.connect("activate", lambda w : self.data.entry_dialog.emit('response',Gtk.ResponseType.ACCEPT))
        self.data.entry_dialog.parse_geometry("400x400")
        #self.data.entry_dialog.set_decorated(False)
        if callback in dir(self.handler_instance):
            self.data.entry_dialog.connect("response", self.handler_instance[callback],calc,data,data2)
        else:
            self.data.entry_dialog.connect("response", self[callback],calc,data,data2)
        self.data.entry_dialog.show_all()

    def on_numerical_entry_return(self,widget,result,calc,userdata,userdata2):
        """This is a default callback function from the launch_numerical_input dialog.
            Requires a status bar called 'statusbar1' to display the answer
        """
        data = calc.get_value()
        if result == Gtk.ResponseType.ACCEPT:
            print ("accept",data)
            if data == None:
                data = 0
            self.widgets.statusbar1.push(1,"Last Calculation: %f"%data)
        widget.destroy()
        self.data.entry_dialog = None

    def on_offset_origin_entry_return(self,widget,result,calc,userdata,userdata2):
        """This is a callback function from launch_numerical_input dialog when used for origin offset entry.
            it will use data.axis_list to select the axis to offset.
            if the axis is a,b,c it will assume degree input
            it will set the offset and reload the graphics display
        """
        value = calc.get_value()
        if result == Gtk.ResponseType.ACCEPT:
            if value == None:
                return
            # if an axis is selected then set it
            for axis in self.data.axis_list:
                if self.widgets["axis_%s"%axis].get_active():
                    print("set %s axis" %axis)
                    if not axis == "s":
                        if axis in('a','b','c'):
                            pos = self.get_qualified_input(value,switch=_DEGREE_INPUT)
                        else:
                            pos = self.get_qualified_input(value)
                        self.mdi_control.set_axis(axis,pos)
                        self.reload_plot()
        widget.destroy()
        self.data.entry_dialog = None

    def on_tool_offset_entry_return(self,widget,result,calc,userdata,userdata2):
        """This is a callback function from launch_numerical_input dialog when used for tool offset entry.
            it will use data.axis_list to select the axis to offset.
            if the axis is a,b,c it will assume degree input
            it will set the offset and reload the graphics display
        """
        value = calc.get_value()
        if result == Gtk.ResponseType.ACCEPT:
            if value == None:
                return
            # if an axis is selected then set it
            for axis in self.data.axis_list:
                if self.widgets["axis_%s"%axis].get_active():
                    print("tool %d, set in %s axis to- %f" %(self.data.tool_in_spindle,axis,value))
                    if axis in('a','b','c'):
                        pos = self.get_qualified_input(value,switch=_DEGREE_INPUT)
                    else:
                        pos = self.get_qualified_input(value)
                    self.mdi_control.touchoff(self.data.tool_in_spindle,axis,pos)
        widget.destroy()
        self.data.entry_dialog = None

    def on_adj_overrides_entry_return(self,widget,result,calc,userdata,userdata2):
        """This is a callback function for override entry dialog.
        """
        data = calc.get_value()
        print("accept",data)
        if data == None:
            return None
        self.adjustment_buttons(userdata,userdata2,data)
        widget.destroy()
        self.data.entry_dialog = None

    # shows the cursor and warps it to the origin before exiting
    def hack_leave(self,*args):
        """This is a function that moves the cursor to screen center,
            if the cursor is hidden.
            usually called just before closing Gscreen
        """
        if not self.data.hide_cursor: return
        w = self.widgets.window1.window
        d = w.get_display()
        s = w.get_screen()
        x, y = w.get_origin()
        d.warp_pointer(s, x, y)

    def on_hide_cursor(self,*args):
        """This is a callback for the 'hide cursor' button.
            Sets the data.hide_cursor flag.
            records the state in the preference file.
            Hides the cursor
            Requires the button to be called hide_cursor
        """
        print("hide cursor change")
        if self.widgets.hide_cursor.get_active():
            self.prefs.putpref('hide_cursor', True)
            self.data.hide_cursor = True
            self.widgets.window1.window.set_cursor(INVISABLE)
        else:
            self.prefs.putpref('hide_cursor', False)
            self.data.hide_cursor = False
            self.widgets.window1.window.set_cursor(None)

    # opens halshow
    def on_halshow(self,*args):
        """This is a callback function to launch the HALshow program.
        """
        print("halshow",TCLPATH)
        p = os.popen("tclsh %s/bin/halshow.tcl &" % (TCLPATH))

    # opens the calibration program
    def on_calibration(self,*args):
        """This is a callback function to launch a calibration program.
        """
        print("calibration --%s"% self.inipath)
        p = os.popen("tclsh %s/bin/emccalib.tcl -- -ini %s > /dev/null &" % (TCLPATH,self.inipath),"w")

    # opens the linuxcnc status program
    def on_status(self,*args):
        """This is a callback function to launch the linuxcnc status program.
        """
        p = os.popen("linuxcnctop  > /dev/null &","w")

    # opens a halmeter
    def on_halmeter(self,*args):
        """This is a callback function to launch the halmeter program.
        """
        print("halmeter")
        p = os.popen("halmeter &")

    # opens the halscope
    def on_halscope(self,*args):
        """This is a callback function to launch the halscope program.
        """
        p = os.popen("halscope  > /dev/null &","w")

    def on_ladder(self,*args):
        """This is a callback function to launch  classicladder's GUI program.
        """
        if  hal.component_exists('classicladder_rt'):
            p = os.popen("classicladder  &","w")
        else:
            self.notify(_("INFO:"),_("Classicladder realtime component not detected"),INFO_ICON)
            self.add_alarm_entry(_("ladder not available - is the realtime component loaded?"))

    # estop machine before closing
    def on_window1_destroy(self, widget, data=None):
        """This ia a callback function to estop and close the window.
        """
        print("estopping / killing gscreen")
        self.emc.machine_off(1)
        self.emc.estop(1)
        time.sleep(2)
        Gtk.main_quit()

    def on_axis_selection_clicked(self,widget):
        """This is a callback to update the axis selection data.
            It calls update_active_axis_buttons()
        """
        self.update_active_axis_buttons(widget)

    def on_mode_clicked(self,widget,event):
        """This is a callback function to change modes in Gscreen.
            Requires a button called 'button_mode' with a label
            calls mode_changed()
        """
        # only change machine modes on click
        if event.type == Gdk.EventType.BUTTON_PRESS:
            a,b,c = self.data.mode_order
            self.data.mode_order = b,c,a
            label = self.data.mode_labels
            self.widgets.button_mode.set_label(label[self.data.mode_order[0]])
            self.mode_changed(self.data.mode_order[0])

    def on_button_show_offsets_clicked(self,widget):
        """This is a callback function to show offsets in the graphics display.
            It calls toggle_offset_view()
        """
        self.toggle_offset_view()

    # Horizontal buttons
    def on_button_home_all_clicked(self,widget):
        """This is a callback function to home all axis
            It calls home_all()
        """
        self.home_all()
    def on_button_unhome_all_clicked(self,widget):
        """This is a callback function to unhome all axis
            It calls unhome_all()
        """
        self.unhome_all()
    def on_button_home_axis_clicked(self,widget):
        """This is a callback function to home selected axis
            It calls home_selected()
        """
        self.home_selected()
    def on_button_unhome_axis_clicked(self,widget):
        """This is a callback function to unhome selected axis
            It calls unhome_selected()
        """
        self.unhome_selected()
    def on_button_toggle_readout_clicked(self,widget):
        """This is a callback function to toggle the dro readout
            It calls dro_toggle()
        """
        self.dro_toggle()

    def on_button_jog_mode_clicked(self,widget):
        """This is a callback function to set jog mode
            It calls jog_mode()
        """
        self.jog_mode()
    def on_button_select_system_clicked(self,widget):
        """This is a callback function to select user origin systems
            It calls origin_system()
        """
        self.origin_system()
    def on_button_flood_coolant_clicked(self,widget):
        """This is a callback function to toggle flood cooling
            It calls toggle_flood()
        """
        self.toggle_flood()
    def on_button_mist_coolant_clicked(self,widget):
        """This is a callback function to toggle mist coolant
            It calls toggle_mist()
        """
        self.toggle_mist()
    def on_button_tool_editor_clicked(self,widget):
        """This is a callback function to reload the tooltable
            It calls reload_tooltable()
        """
        self.reload_tooltable()

    def on_button_block_delete_clicked(self,widget):
        """This is a callback function to toggle block delete
            It calls toggle_block_delete()
        """
        self.toggle_block_delete()
    def on_button_option_stop_clicked(self,widget):
        """This is a callback function to toggle optional stop
            It calls toggle_optional_stop()
        """
        self.toggle_optional_stop()
    def on_button_next_tab_clicked(self,widget):
        """This is a callback function to change viewing tabs
            It calls next_tab()
        """
        self.next_tab()
    def on_button_overrides_clicked(self,widget,button):
        """This is a callback function to toggle_overrides
            It calls toggle_overrides()
        """
        self.toggle_overrides(widget,button)

    def on_button_clear_view_clicked(self,widget):
        """This is a callback function to clear the graphics display.
            It calls clear_plot()
        """
        self.clear_plot()
    def on_graphic_overrides_clicked(self,widget,button):
        """This is a callback function to toggle override selection buttons
            It calls toggle_graphic_overrides(widget, button)
        """
        self.toggle_graphic_overrides(widget,button)

    # vertical buttons
    def on_button_plus_pressed(self,widget):
        """This is a callback function for a press of the + screen button
            It calls adjustment_buttons(widget, True)
        """
        self.adjustment_buttons(widget,True)
    def on_button_plus_released(self,widget):
        """This is a callback function for the release of the + screen button
            It calls adjustment_buttons(widget, False)
        """
        self.adjustment_buttons(widget,False)
    def on_button_minus_pressed(self,widget):
        """This is a callback function for a press of the - screen button
            It calls adjustment_buttons(widget, True)
        """
        self.adjustment_buttons(widget,True)
    def on_button_minus_released(self,widget):
        """This is a callback function for the release of the - screen button
            It calls adjustment_buttons(widget, False)
        """
        self.adjustment_buttons(widget,False)
    def on_offset_origin_clicked(self,widget):
        """This is a callback function for a press of the offset origin button
            If button_override is active then an override adjustment dialog is launched
            otherwise set_axis_checks() is called.
        """
        # adjust overrides
        if self.widgets.button_override.get_active():
            self.launch_numerical_input("on_adj_overrides_entry_return",widget,True,title=_("Override Entry"))
        # offset origin
        else:
            self.set_axis_checks()
    def on_move_to_clicked(self,widget):
        """This is a callback function for a press of the move_to button
            If in manual mode and the job mode is active the launches
            a numerical input dialog.
        """
        # Move-to button
        # manual mode and jog mode active
        if self.data.mode_order[0] == self.data._MAN and self.widgets.button_jog_mode.get_active():
            self.launch_numerical_input("on_adj_overrides_entry_return",widget,True)

    def on_tool_touchoff_clicked(self,widget):
        """This is a callback function for a press of the tool_touchoff  button
            It calls tool_touchoff_checks()
        """
        print("touch")
        self.tool_touchoff_checks()

    def on_mode_select_clicked(self,widget,event):
        """This is a callback function for a press of the mode_select button
            It cycles between the available notebook_main pages
            Requires a notebook widget called notebook_main
        """
        maxpage = self.widgets.notebook_main.get_n_pages()
        page = self.widgets.notebook_main.get_current_page()
        nextpage = page + 1
        print("mode select",maxpage,page,nextpage)
        if nextpage == maxpage:nextpage = 0
        self.widgets.notebook_main.set_current_page(nextpage)

    def on_estop_clicked(self,*args):
        """This is a callback function for a click of the estop button
            It will toggle between estop/machine off and enabled/machine on.
            Requires a button widget with a label named on_label
            Adds an alarm entry message on each toggle. 
        """
        if self.data.estopped:
            self.emc.estop_reset(1)
        elif not self.data.machine_on:
            self.emc.machine_on(1)
            self.widgets.on_label.set_text(_("Machine On"))
            self.add_alarm_entry(_("Machine powered on"))
        else:
            self.emc.machine_off(1)
            self.emc.estop(1)
            self.widgets.on_label.set_text(_("Machine Off"))
            self.add_alarm_entry(_("Machine Estopped!"))

    def on_calc_clicked(self,widget):
        """This is a callback function for a press of the calculator button
            It calls launch_numerical_input(title=_("Calculator"))
        """
        self.launch_numerical_input(title=_("Calculator"))

    def on_theme_choice_changed(self, widget):
        """This is a callback function for a press of the on_theme_choice button
            It calls change_theme(widget.get_active_text()
            Requires a calling widget that returns a text string.
        """
        active_iter = widget.get_active_iter()
        if active_iter:
            print("texst",widget.get_model()[active_iter][0])
            #self.change_theme(widget.get_active_text())
            self.change_theme(widget.get_model()[active_iter][0])

        #self.change_theme(widget.get_active_text())
    # True is fullscreen
    def on_fullscreen1_pressed(self, widget):
        """This is a callback function for a toggle of the fullscreen button
            It calls set_fullscreen(widget.get_active())
            Requires a calling widget that returns an active state.
        """
        self.set_fullscreen1(widget.get_active())

    def on_use_screen2_pressed(self,*args):
        """This is a callback function for a click of the use screen 2 button
            It calls set_toggle)screen2()
        """
        self.toggle_screen2()

    # True is metric
    def on_dro_units_pressed(self, widget):
        """This is a callback function for a toggle of the metric button
            It calls set_dro_units(widget.get_active())
            Requires a calling widget that returns an active state.
        """
        self.set_dro_units(widget.get_active())

    # True is diameter mode
    def on_diameter_mode_pressed(self, widget):
        """This is a callback function for a toggle of the diameter button
            It calls set_diameter_mode(widget.get_active())
            Requires a calling widget that returns an active state.
        """
        self.set_diameter_mode(widget.get_active())

    def on_rel_colorbutton_color_set(self,*args):
        """This is a callback function for a press of the relative color button
            It calls set_rel_color()
        """
        self.set_rel_color()

    def on_abs_colorbutton_color_set(self,*args):
        """This is a callback function for a press of the absolute color button
            It calls set_abs_color()
        """
        self.set_abs_color()

    def on_dtg_colorbutton_color_set(self,*args):
        """This is a callback function for a press of the distance to go color button
            It calls set_dtg_color()
        """
        self.set_dtg_color()

    # True for showing full offsets
    def on_show_offsets_pressed(self, widget):
        """This is a callback function for a toggle of the show offsets button
            It calls set_show_offsets(widget.get_active())
            Requires a calling widget that returns an active state.
        """
        self.set_show_offsets(widget.get_active())

    def on_unlock_number_value_changed(self,widget):
        """This is a callback function for an entry of the unlock code.
            It sets data.unlock_code from the widget value
            Requires a calling widget that returns an value.
            Calls set_unlock_code()
        """
        self.data.unlock_code = str(int(widget.get_value()))
        self.set_unlock_code()

    # True is for showing DTG
    def on_show_dtg_pressed(self, widget):
        """This is a callback function for a toggle of the show distance to go button
            It calls set_show_dtg(widget.get_active())
            Requires a calling widget that returns an active state.
        """
        self.set_show_dtg(widget.get_active())

    # True will use notify 
    def on_desktop_notify_toggled(self,widget):
        """This is a callback function for a toggle of the decktop_notify button
            It calls set_desktop_notify(widget.get_active())
            Requires a calling widget that returns an active state.
        """
        self.set_desktop_notify( widget.get_active())

    def on_pop_statusbar_clicked(self, *args):
        """This is a callback function for a press of the pop_statusbar button
            It removes the last message on the status bar.
            Requires a statusbar widget called statusbar1.
        """
        self.widgets.statusbar1.pop(self.statusbar_id)

    # This is part of the user message system
    # There is status that prints to the status bar
    # There is Okdialog that prints a dialog that the user must acknowledge
    # there is yes/no dialog where the user must choose between yes or no
    # you can combine status and dialog messages so they print to the status bar 
    # and pop a dialog
    def on_printmessage(self, pin, pinname,boldtext,text,type):
        """This is a callback function that is part of the user message system
            There is 'status' option that prints to the status bar
            There is 'okdialog' option that prints a dialog that the user must acknowledge
            there is 'yes/no' option where the user must choose between yes or no
            you can combine status and dialog messages so they print to the status bar 
            and pop a dialog
        """
        if not pin.get(): return
        if boldtext == "NONE": boldtext = None
        if "status" in type:
            if boldtext:
                statustext = boldtext
            else:
                statustext = text
            self.notify(_("INFO:"),statustext,INFO_ICON)
        if "dialog" in type or "okdialog" in type:
            if pin.get():
                self.halcomp[pinname + "-waiting"] = True
            if "okdialog" in type:
                self.warning_dialog(boldtext,True,text,pinname)
            else:
                if pin.get():
                    self.halcomp[pinname + "-response"] = 0
                self.warning_dialog(boldtext,False,text,pinname)

    def toggle_overrides(self,widget,data):
        """This is a callback function to toggle between override enable buttons.
            This is part of a function to allow a MPG to adjust overrides.
            Requires toggle buttons widgets named:
            'jog_speed'
            'jog_increments'
            'feed_override'
            'spindle_override'
            'rapid_override'
            Calls update_hal_override_pins()
        """
        print("overrides - button_h_%s"% data)
        list = ('jog_speed','jog_increments','feed_override','spindle_override','rapid_override')
        for i in (list):
            print(i,data)
            if i == data:continue
            button = "button_%s"% (i)
            print("block",button)
            self.block(button)
            self.widgets[button].set_active(False)
            self.unblock(button)
        self.update_hal_override_pins()

    def toggle_graphic_overrides(self,widget,data):
        """This is a callback function to toggle between graphic display adjustment buttons.
            Requires toggle buttons widgets named:
            'zoom'
            'pan_v'
            'pan_h'
            'rotate_v'
            'rotate_h'
        """
        print("graphic overrides - button_%s"%data)
        list = ('zoom','pan_v','pan_h','rotate_v','rotate_h')
        for i in (list):
            if i == data:continue
            button = "button_%s"% (i)
            self.block(button)
            self.widgets[button].set_active(False)
            self.unblock(button)

    def on_hal_status_interp_run(self,widget):
        """This is a callback function called when linuxcnc's interpreter is running.
            It sensitives widgets in a string list called data.sensitive_run_idle
            calls function sensitize_widgets(self.data.sensitive_run_idle,False)
        """
        print("run")
        self.sensitize_widgets(self.data.sensitive_run_idle,False)

    def on_hal_status_interp_idle(self,widget):
        """This is a callback function called when linuxcnc's interpreter is idle.
            It un-sensitives widgets in a string list called data.sensitive_run_idle
            calls function sensitize_widgets(self.data.sensitive_run_idle,True)
            It un/sensitizes widgets in a string list called self.data.sensitive_all_homed.
            It sets linuxcnc into manual mode if Gscreen is on the manual page.
        """
        print("idle")
        self.sensitize_widgets(self.data.sensitive_run_idle,True)
        state = self.data.all_homed
        self.sensitize_widgets(self.data.sensitive_all_homed,state)
        mode = self.emc.get_mode()
        print("mode",mode,self.data.mode_order[0])
        if self.data.mode_order[0] == self.data._MAN and not mode == 1:
            print("set to manual")
            self.emc.set_manual_mode()

    def on_hal_status_state_on(self,widget):
        """This is a callback function called when linuxcnc's state is on.
            It sensitives widgets in a string list called data.sensitive_on_off
            It un/sensitizes widgets in a string list called self.data.sensitive_all_homed.
            calls function sensitize_widgets(self.data.sensitive_on_off,True)
            if not homed it preselects the homing button options
        """
        print("on")
        self.sensitize_widgets(self.data.sensitive_on_off,True)
        state = self.data.all_homed
        self.sensitize_widgets(self.data.sensitive_all_homed,state)
        if not state:
            self.widgets.button_homing.emit("clicked")

    def on_hal_status_state_off(self,widget):
        """This is a callback function called when linuxcnc's state is off.
            It sensitives widgets in a string list called data.sensitive_on_off
        """
        print("off")
        self.sensitize_widgets(self.data.sensitive_on_off,False)

    def on_hal_status_axis_homed(self,widget,data):
        """This is a callback function called when linuxcnc is homed.
            It adds an alarm entry about homed axes
        """
        print("homed list",data)
        temp=[]
        for letter in(self.data.axis_list):
            count = "xyzabcuvws".index(letter)
            if str(count) in data:
                temp.append(" %s"%letter.upper())
        self.add_alarm_entry(_("Axes %s are homed"%temp))

    def on_hal_status_all_homed(self,widget):
        """This is a callback function called when linuxcnc is homed.
            It adds an alarm entry when all axes are homed.
            It removes the 'ready to home' message from the status bar.
            It deselects the homing button options panel
            Requires a statusbar widget called statusbar1
            Requires a homing options selection toggle button called button_homing
        """
        print("all-homed")
        self.data.all_homed = True
        self.widgets.button_homing.set_active(False)
        self.widgets.statusbar1.remove_message(self.statusbar_id,self.homed_status_message)
        self.add_alarm_entry(_("All the axes have been homed"))

    def on_hal_status_not_all_homed(self,widget,data):
        """This is a callback function called when linuxcnc is unhomed.
            It adds an alarm entry about unhomed axes
        """
        print("not-all-homed",data)
        self.data.all_homed = False
        temp =[]
        for letter in(self.data.axis_list):
            count = "xyzabcuvws".index(letter)
            if str(count) in data:
                temp.append(" %s"%letter.upper())
        self.add_alarm_entry(_("There are unhomed axes: %s"%temp))

    def on_hal_status_file_loaded(self,widget,filename):
        """This is a callback function called when linuxcnc loads a file.
            It adds an alarm entry about the program loaded
            requires a text displaying widget called gcode_tab
        """
        path,name = os.path.split(filename)
        self.widgets.gcode_tab.set_text(name)
        self.add_alarm_entry(_("Program loaded: %s"%filename))

    def on_toggle_keyboard(self,widget,args="",x="",y=""):
        """This is a callback function to display a virtual keyboard
            It will try to grab focus to mdi widget or gcode display widget
            Optionally requires a MDI widget called hal_mdihistroy
            Optionally requires a Gcode display widget called gcode_view
        """
        if self.data.ob:
            self.kill_keyboard()
        else:
            self.launch_keyboard()
            if self.data.mode_order[0] == self.data._MDI:
                try:
                    self.widgets.hal_mdihistory.entry.grab_focus()
                except:
                    dbg("**** GSCREEN ERROR: can't set focus to hal_mdihistory when Onboard launched - Is this widget name in glade file?")
            elif self.data.mode_order[0] == self.data._AUTO:
                try:
                    self.widgets.gcode_view.grab_focus()
                except:
                    dbg("**** GSCREEN ERROR: can't set focus to gcode_view when Onboard launched - Is this widget name in glade file?")

    def on_hal_jog_increments_changed(self,halpin):
        """This is a callback function called from a hal pin state change
            this is part of a way to externally control Gscreens jog increments
            calls set_jog_increments(vector=data)
        """
        print(halpin.get())
        data = halpin.get()
        self.set_jog_increments(vector=data)

    def on_hal_jog_rate_changed(self,halpin):
        """This is a callback function called from a hal pin state change
            this is part of a way to externally control Gscreens jog rate
            calls set_jog_rate(absolute=data)
        """
        print(halpin.get())
        data = halpin.get()
        self.set_jog_rate(absolute=data)

    # highlight the gcode down one line lower
    # used for run-at-line restart
    def restart_down(self,widget,calc):
        """This is a callback function to set restart line on line down
            Requires a gcode display widget call gcode_view
            calls update_restart_line(line)
        """
        self.widgets.gcode_view.line_down()
        line = int(self.widgets.gcode_view.get_line_number())
        calc.set_value(line)
        self.update_restart_line(line)

    # highlight the gcode down one line higher
    # used for run-at-line restart
    def restart_up(self,widget,calc):
        """This is a callback function to set restart line on line up
            Requires a gcode display widget call gcode_view
            calls update_restart_line(line)
        """
        self.widgets.gcode_view.line_up()
        line = int(self.widgets.gcode_view.get_line_number())
        calc.set_value(line)
        self.update_restart_line(line)

    # highlight the gcode line specified
    # used for run-at-line restart
    def restart_set_line(self,widget,calc):
        """This is a callback function to set the restart line.
            Requires a gcode display widget call gcode_view
            calls update_restart_line(line)
            If the line entered is invalid line is set to beginning
        """
        try:
            line = int(calc.get_value())
        except:
            calc.set_value("0.0")
            line = 0
        self.widgets.gcode_view.set_line_number(line)
        self.update_restart_line(line)

    # This is a method that toggles the DRO units
    # the preference unit button saves the state
    # for startup, This one just changes it for the session
    def on_metric_select_clicked(self,widget):
        """This is a callback function to toggle the DRO units for this session
            Calls set_dro_units(data,False)
        """
        data = (self.data.dro_units -1) * -1
        self.set_dro_units(data,False)

    def on_button_edit_clicked(self,widget):
        """This is a callback function to set state of gcode edit mode.
            Requires a calling widget that returns state
            Requires a notebook widget called notebook_main
            Requires a toggle button called button_full_view
            Requires a box widget called search_box
            if state False calls edited_gcode_check()
            Calls edit_mode(state)
            if state False and button_full_view is true calls set_full_graphics_view(True)
            shows/hides search_box
        """
        state = widget.get_active()
        if not state:
            self.edited_gcode_check()
        self.widgets.notebook_main.set_current_page(0)
        self.widgets.notebook_main.set_show_tabs(not (state))
        self.edit_mode(state)
        if not state and self.widgets.button_full_view.get_active():
            self.set_full_graphics_view(True)
        if state:
            self.widgets.search_box.show()
        else:
            self.widgets.search_box.hide()

    def on_button_change_view_clicked(self,widget):
        """This is a callback function to change the graphics display view.
            Calls toggle_view()
        """
        self.toggle_view()

    def on_button_full_view_clicked(self,widget):
        """This is a callback function to toggle the graphics full view option.
            Requires a calling widget that returns a state
            Calls set_full_graphics_view(widget.get_active())
        """
        self.set_full_graphics_view(widget.get_active())

# ****** do stuff *****

    def check_mode(self):
        """This function checks if Gscreen is in jog mode and manual mode
            Tries to call check_mode() in a handler file instead of this default function
            Requires a notebook widget called notebook_main
            Assumes page 0 is the manual page
            Requires a jog mode toggle button called button_jog_mode
            it returns a string list
        """
        try:
            return self.handler_instance.check_mode()
        except:
            pass
        string=[]
        if self.data.mode_order[0] == self.data._MAN and self.widgets.notebook_main.get_current_page() == 0:
            string.append( self.data._MAN)
            if self.widgets.button_jog_mode.get_active(): # jog mode active
                string.append(self.data._JOG)
        return string

    def spindle_dialog(self):
        """This is a function to launch a manual spindle control dialog
        """
        if not self.data.spindle_control_dialog:
            self.data.spindle_control_dialog = Gtk.Dialog(_("Manual Spindle Control"),
                   self.widgets.window1,
                   0,
                   (Gtk.STOCK_CLOSE, Gtk.ResponseType.REJECT),
                   destroy_with_parent = True)
            self.data.spindle_control_dialog.vbox.add(self.widgets.frame_s)
            self.data.spindle_control_dialog.parse_geometry("200x200")
            self.data.spindle_control_dialog.connect("delete_event", self.spindle_dialog_return)
            self.data.spindle_control_dialog.connect("response",  self.spindle_dialog_return)
        self.data.spindle_control_dialog.show_all()

    def spindle_dialog_return(self,widget,signal):
        """This is a callback function from spindle_dialog
            It hides the dialog
        """
        self.data.spindle_control_dialog.hide()
        return True

    def update_restart_line(self,line):
        """This function sets restart linenumber to line 
            calls set_restart_line(line) either from a handler file or internally
        """
        if "set_restart_line" in dir(self.handler_instance):
            self.handler_instance.set_restart_line(line)
        else:
            self.set_restart_line(line)

    def set_restart_line(self,line):
        """This function sets the restart linenumber to line
            Requires a action widget called hal_toggleaction_run
        """
        self.widgets.hal_toggleaction_run.set_restart_line(line)

    def edited_gcode_check(self):
        """This is a function to launch a edited-gcode warning dialog if it detects edits.
            Requires a action widget called hal_action_saveas
            Requires a gcode display widget called gcode_view
        """
        if self.widgets.gcode_view.buf.get_modified():
                dialog = Gtk.MessageDialog(self.widgets.window1,
                   0,
                   Gtk.MessageType.QUESTION, Gtk.ButtonsType.YES_NO,"You edited the File. save edits?\n Choosing No will erase the edits.",
                   destroy_with_parent = True)
                dialog.show_all()
                result = dialog.run()
                dialog.destroy()
                if result == Gtk.ResponseType.YES:
                    self.widgets.hal_action_saveas.emit("activate")
                else:
                    self.widgets.gcode_view.load_file()

    def set_desktop_notify(self,data):
        """This is a function to toggle a desktop message notify option
            It will record state in the preference file.
        """
        self.data.desktop_notify = data
        self.prefs.putpref('desktop_notify', data, bool)


    def launch_keyboard(self,args="",x="",y=""):
        """This is a function to show 'Onboard' or 'matchbox' virtual keyboard if available.
            check for key_box widget - if there is, and embedded flag, embed Onboard in it.
            else launch an independent Onboard inside a dialog so it works in fullscreen
            (otherwise it hides when main screen is touched)
            else error message
        """
        def load_keyboard():
            if os.path.isfile( "/usr/bin/onboard" ):
                self.data.ob = subprocess.Popen( ["onboard", "--xid", args, x, y],
                                                   stdin = subprocess.PIPE,
                                                   stdout = subprocess.PIPE,
                                                   close_fds = True )
                return True
            elif os.path.isfile( "/usr/bin/matchbox-keyboard" ):
                self.data.ob = subprocess.Popen( ["matchbox-keyboard", "--xid"],
                                                   stdin = subprocess.PIPE,
                                                   stdout = subprocess.PIPE,
                                                   close_fds = True )
                return True
            else:
                print(_("Error with launching on-screen keyboard program -can't find program."))
                self.add_alarm_entry(_("Error with launching on-screen keyboard program -can't find program."))
                return False

        def dialog_keyboard():
            if self.data.keyboard_dialog:
                self.data.keyboard_dialog.show()
                self.data.ob = True
            else:
                if load_keyboard():
                    sid = self.data.ob.stdout.readline()
                    self.data.keyboard_dialog = Gtk.Dialog(_("Keyboard"),
                               self.widgets.window1,
                               destroy_with_parent = True)
                    self.data.keyboard_dialog.set_accept_focus(False)
                    self.data.keyboard_dialog.set_deletable(False)
                    socket = Gtk.Socket()
                    socket.show()
                    self.data.keyboard_dialog.vbox.add(socket)
                    socket.add_id(int(sid))
                    self.data.keyboard_dialog.parse_geometry("800x200")
                    self.data.keyboard_dialog.show_all()
                    self.data.keyboard_dialog.connect("destroy", self.keyboard_return)

        try:
            if self.widgets.key_box and self.data.embedded_keyboard:
                try:
                    self.widgets.rightside_box.show()
                except:
                    pass
                self.widgets.key_box.show()
                if load_keyboard():
                    sid = self.data.ob.stdout.readline()
                    print("keyboard", sid) # skip header line
                    socket = Gtk.Socket()
                    socket.show()
                    self.widgets.key_box.add(socket)
                    socket.add_id(int(sid))
            else:
                dialog_keyboard()
        except Exception as e:
            try:
                dialog_keyboard()
            except:
                print(_("Error with launching 'Onboard' on-screen keyboard program %s"%e))

    # seems the only way to trap the destroy signal
    def keyboard_return(self,widget):
        self.data.keyboard_dialog = None
        self.data.ob = None

    # if keyboard in dialog just hide it
    # else kill it and if needed hide the key_box
    def kill_keyboard(self):
        if not self.data.keyboard_dialog == None:
            self.data.keyboard_dialog.destroy()
            self.data.ob = None
            return
        try:
            self.widgets.key_box.hide()
            self.data.ob.kill()
            self.data.ob.terminate()
            self.data.ob = None
        except:
            try:
                self.data.ob.kill()
                self.data.ob.terminate()
                self.data.ob = None
            except:
                self.show_try_errors()

    # this installs local signals unless overridden by custom handlers
    # HAL pin signal call-backs are covered in the HAL pin initialization functions
    def connect_signals(self, handlers):

        signal_list = [
                        ["","button_estop","clicked", "on_estop_clicked"],
                        ["","gremlin","motion-notify-event", "on_gremlin_motion"],
                        ["","button_mode","button_press_event", "on_mode_clicked"],
                        ["","button_menu","button_press_event", "on_mode_select_clicked"],
                        ["","button_plus","pressed", "on_button_plus_pressed"],
                        ["","button_plus","released", "on_button_plus_released"],
                        ["","button_minus","pressed", "on_button_minus_pressed"],
                        ["","button_minus","released", "on_button_minus_released"],
                        ["","button_zero_origin","clicked", "adjustment_buttons",True],
                        ["","button_offset_origin","clicked", "on_offset_origin_clicked"],

                        ["","button_move_to","clicked", "on_move_to_clicked"],
                        ["","button_tool_set","clicked", "on_tool_touchoff_clicked"],
                        ["","button_change_view","clicked", "on_button_change_view_clicked"],
                        ["","button_full_view","clicked", "on_button_full_view_clicked"],
                        ["","button_home_all","clicked", "on_button_home_all_clicked"],
                        ["","button_unhome_all","clicked", "on_button_unhome_all_clicked"],
                        ["","button_home_axis","clicked", "on_button_home_axis_clicked"],
                        ["","button_unhome_axis","clicked", "on_button_unhome_axis_clicked"],
                        ["","button_toggle_readout","clicked", "on_button_toggle_readout_clicked"],
                        ["","button_jog_mode","clicked", "on_button_jog_mode_clicked"],
                        ["","button_spindle_controls","clicked", "on_button_spindle_controls_clicked"],

                        ["","button_select_system","clicked", "on_button_select_system_clicked"],
                        ["","button_mist_coolant","clicked", "on_button_mist_coolant_clicked"],
                        ["","button_flood_coolant","clicked", "on_button_flood_coolant_clicked"],
                        ["","button_tool_editor","clicked", "on_button_tool_editor_clicked"],
                        ["","button_toggle_readout2","clicked", "on_button_toggle_readout_clicked"],
                        ["","button_show_offsets","clicked", "on_button_show_offsets_clicked"],
                        ["","button_block_delete","clicked", "on_button_block_delete_clicked"],
                        ["","button_option_stop","clicked", "on_button_option_stop_clicked"],
                        ["","button_next_tab","clicked", "on_button_next_tab_clicked"],
                        ["","button_calc","clicked", "on_calc_clicked"],
                ["block","button_jog_speed","clicked", "on_button_overrides_clicked","jog_speed"],
                        ["","button_select_rotary_adjust","clicked", "on_button_select_rotary_adjust_clicked"],

                ["block","button_jog_increments","clicked", "on_button_overrides_clicked","jog_increments"],
                ["block","button_feed_override","clicked", "on_button_overrides_clicked","feed_override"],
                ["block","button_spindle_override","clicked", "on_button_overrides_clicked","spindle_override"],
                ["block","button_rapid_override","clicked", "on_button_overrides_clicked","rapid_override"],
                ["block","button_zoom","clicked", "on_graphic_overrides_clicked","zoom"],
                ["block","button_pan_v","clicked", "on_graphic_overrides_clicked","pan_v"],
                ["block","button_pan_h","clicked", "on_graphic_overrides_clicked","pan_h"],
                ["block","button_rotate_v","clicked", "on_graphic_overrides_clicked","rotate_v"],
                ["block","button_rotate_h","clicked", "on_graphic_overrides_clicked","rotate_h"],
                        ["","button_clear_view","clicked", "on_button_clear_view_clicked"],

                        ["","theme_choice","changed", "on_theme_choice_changed"],
                        ["","use_screen2","clicked", "on_use_screen2_pressed"],
                        ["","dro_units","clicked", "on_dro_units_pressed"],
                        ["","diameter_mode","clicked", "on_diameter_mode_pressed"],
                        ["","button_edit","toggled", "on_button_edit_clicked"],
                        ["","show_offsets","clicked", "on_show_offsets_pressed"],
                        ["","show_dtg","clicked", "on_show_dtg_pressed"],
                        ["","fullscreen1","clicked", "on_fullscreen1_pressed"],
                        ["","shut_down","clicked", "on_window1_destroy"],
                        ["","shut_down",'released',"hack_leave"],

                        ["","run_halshow","clicked", "on_halshow"],
                        ["","run_calibration","clicked", "on_calibration"],
                        ["","run_status","clicked", "on_status"],
                        ["","run_halmeter","clicked", "on_halmeter"],
                        ["","run_halscope","clicked", "on_halscope"],
                        ["","run_ladder","clicked", "on_ladder"],
                        ["","hide_cursor","clicked", "on_hide_cursor"],
                        ["","button_homing","clicked", "homing"],
                        ["","button_override","clicked", "override"],
                        ["","button_graphics","clicked", "graphics"],

                        ["","desktop_notify","toggled", "on_desktop_notify_toggled"],
                        ["","grid_size","value_changed", "set_grid_size"],
                        ["","spindle_start_rpm","value_changed", "set_spindle_start_rpm"],
                        ["","spindle_control","clicked", "on_spindle_control_clicked"],
                        ["","spindle_preset","clicked", "on_preset_spindle"],
                        ["","spindle_increase","clicked", "on_spindle_speed_adjust"],
                        ["","spindle_decrease","clicked", "on_spindle_speed_adjust"],
                        ["","audio_error_chooser","update-preview", "update_preview"],
                        ["","audio_alert_chooser","update-preview", "update_preview"],
                        ["","hal_status","interp-idle", "on_hal_status_interp_idle"],

                        ["","hal_status","interp-run", "on_hal_status_interp_run"],
                        ["","hal_status","state-on", "on_hal_status_state_on"],
                        ["","hal_status","state-off", "on_hal_status_state_off"],
                        ["","hal_status","homed", "on_hal_status_axis_homed"],
                        ["","hal_status","all-homed", "on_hal_status_all_homed"],
                        ["","hal_status","not-all-homed", "on_hal_status_not_all_homed"],
                        ["","hal_status","file-loaded", "on_hal_status_file_loaded"],
                        ["","window1","destroy", "on_window1_destroy"],
                        ["","pop_statusbar","clicked", "on_pop_statusbar_clicked"],
                        ["","dtg_colorbutton","color-set", "on_dtg_colorbutton_color_set"],

                        ["","abs_colorbutton","color-set", "on_abs_colorbutton_color_set"],
                        ["","rel_colorbutton","color-set", "on_rel_colorbutton_color_set"],
                        ["","eventbox_gremlin","leave_notify_event", "on_eventbox_gremlin_leave_notify_event"],
                        ["","eventbox_gremlin","enter_notify_event", "on_eventbox_gremlin_enter_notify_event"],
                ["block","s_display_rev","toggled", "on_s_display_rev_toggled"],
                ["block","s_display_fwd","toggled", "on_s_display_fwd_toggled"],
                        ["","ignore_limits","clicked", "toggle_ignore_limits"],
                        ["","audio_error_chooser","selection_changed","change_sound","error"],
                        ["","audio_alert_chooser","selection_changed","change_sound","alert"],
                        ["","toggle_keyboard","clicked", "on_toggle_keyboard"],

                        ["","metric_select","clicked","on_metric_select_clicked"],
                        ["","button_restart","clicked", "launch_restart_dialog"],
                        ["","button_index_tool","clicked", "on_index_tool"],

                        ["","button_search_fwd","clicked", "search_fwd"],
                        ["","button_search_bwd","clicked", "search_bwd"],
                        ["","button_replace_text","clicked", "replace_text"],
                        ["","button_undo","clicked", "undo_edit"],
                        ["","button_redo","clicked", "redo_edit"],]

        # check to see if the calls in the signal list are in the custom handler's list of calls
        # if so skip the call in the signal list
        # else connect the signals based on how many arguments they have and if blockable
        for i in signal_list:
            if i[3] in handlers:
                print(_("**** GSCREEN INFO: Overriding internal signal call to %s"% i[3]))
                continue
            try:
                # add id # for blockable signals
                if  i[0] == "block":
                    j = "_sighandler_%s"% i[1]
                    if len(i) == 4:
                        self.data[j] = int(self.widgets[i[1]].connect(i[2], self[i[3]]))
                    if len(i) == 5:
                        self.data[j] = int(self.widgets[i[1]].connect(i[2], self[i[3]],i[4]))
                elif len(i) == 4:
                        self.widgets[i[1]].connect(i[2], self[i[3]])
                elif len(i) == 5:
                    self.widgets[i[1]].connect(i[2], self[i[3]],i[4])
            except Exception as e:
                print(e)
                print ("**** GSCREEN WARNING: could not connect %s to %s"% (i[1],i[3]))

        # setup signals that can be blocked but not overridden 
        for axis in self.data.axis_list:
            cb = "axis_%s"% axis
            i = "_sighandler_axis_%s"% axis
            try:
                self.data[i] = int(self.widgets[cb].connect("clicked", self.on_axis_selection_clicked))
            except:
                self.show_try_errors()

    def toggle_offset_view(self):
            data = self.data.plot_hidden
            data = (data * -1) +1
            self.widgets.dro_frame.set_visible(not data)
            self.widgets.gremlin.set_property('enable_dro', data)
            self.widgets.gremlin.set_property('show_program', not data)
            self.widgets.gremlin.set_property('show_limits', not data)
            self.widgets.gremlin.set_property('show_extents_option', not data)
            self.widgets.gremlin.set_property('show_live_plot', not data)
            self.widgets.gremlin.set_property('show_tool', not data)
            self.widgets.gremlin.show_offsets = data
            self.data.plot_hidden = data

    def preset_spindle_speed(self,rpm):
        self.data.spindle_preset = rpm
        self.widgets.spindle_preset.set_label(" S %d"% rpm)

    def sensitize_widgets(self, widgetlist, value):
        for name in widgetlist:
            try:
                self.widgets[name].set_sensitive(value)
            except:
                print("**** GSCREEN WARNING: No widget named: %s to sensitize"%name)

    def from_internal_linear_unit(self,v, unit=None):
        if unit is None:
            unit = self.status.get_linear_units()
        lu = (unit or 1) * 25.4
        return v*lu

    def parse_increment(self,jogincr):
        if jogincr.endswith("mm"):
            scale = self.from_internal_linear_unit(1/25.4)
        elif jogincr.endswith("cm"):
            scale = self.from_internal_linear_unit(10/25.4)
        elif jogincr.endswith("um"):
            scale = self.from_internal_linear_unit(.001/25.4)
        elif jogincr.endswith("in") or jogincr.endswith("inch"):
            scale = self.from_internal_linear_unit(1.)
        elif jogincr.endswith("mil"):
            scale = self.from_internal_linear_unit(.001)
        else:
            scale = 1
        jogincr = jogincr.rstrip(" inchmuil")
        if "/" in jogincr:
            p, q = jogincr.split("/")
            jogincr = float(p) / float(q)
        else:
            jogincr = float(jogincr)
        return jogincr * scale

    # This prints a message in the status bar, the system notifier (if available)
    # and makes a sound (if available)
    # It returns a statusbar message id reference so one can directly erase the message later.
    # Ubuntu screws with the system notification program so it does follow timeouts
    # There is a ppa on the net to fix this I suggest it.
    # https://launchpad.net/~leolik/+archive/leolik?field.series_filter=lucid
    def notify(self,title,message,icon="",timeout=2):
            messageid = None
            try:
                messageid = self.widgets.statusbar1.push(self.statusbar_id,message)
            except:
                self.show_try_errors()
            self.add_alarm_entry(message)
            if NOTIFY_AVAILABLE and self.data.desktop_notify:
                uri = ""
                if icon:
                    uri = "file://" + icon
                n = pynotify.Notification(title, message, uri)
                n.set_hint_string("x-canonical-append","True")
                n.set_urgency(pynotify.URGENCY_CRITICAL)
                n.set_timeout(int(timeout * 1000) )
                n.show()
            if self.data.audio_available:
                if icon == ALERT_ICON:
                    self.audio.set_sound(self.data.error_sound)
                else:
                    self.audio.set_sound(self.data.alert_sound)
                self.audio.run()
            return messageid

    def add_alarm_entry(self,message):
        try:
            textbuffer = self.widgets.alarm_history.get_buffer()
            textbuffer.insert_at_cursor(strftime("%a, %d %b %Y %H:%M:%S     -", localtime())+message+"\n" )
        except:
            self.show_try_errors()

    def next_tab(self):
        maxpage = self.widgets.notebook_mode.get_n_pages()
        page = self.widgets.notebook_mode.get_current_page()
        nextpage = page + 1
        print("mode select",maxpage,page,nextpage)
        if nextpage == maxpage:nextpage = 0
        self.widgets.notebook_mode.set_current_page(nextpage)

    def set_feed_override(self,percent_rate,absolute=False):
        if absolute:
            rate = percent_rate
        else:
            rate = self.data.feed_override + percent_rate
        if rate > self.data.feed_override_max: rate = self.data.feed_override_max
        self.emc.feed_override(rate)

    def set_rapid_override(self,percent_rate,absolute=False):
        if absolute:
            rate = percent_rate
        else:
            rate = self.data.rapid_override + percent_rate
        if rate > self.data.rapid_override_max: rate = self.data.rapid_override_max
        self.emc.rapid_override(rate)

    def set_spindle_override(self,percent_rate,absolute=False):
        if absolute:
            rate = percent_rate
        else:
            rate = self.data.spindle_override + percent_rate
        if rate > self.data.spindle_override_max: rate = self.data.spindle_override_max
        elif rate < self.data.spindle_override_min: rate = self.data.spindle_override_min
        self.emc.spindle_override(rate)

    def set_velocity_override(self,percent_rate,absolute=False):
        if absolute:
            rate = percent_rate
        else:
            rate = self.data.velocity_override + percent_rate
        if rate > 1.0: rate = 1.0
        self.emc.max_velocity(rate * self.data._maxvelocity)

    def set_jog_rate(self,step=None,absolute=None):
        if self.data.angular_jog_adjustment_flag:
            j_rate = "angular_jog_rate"
        else:
            j_rate = "jog_rate"
        # in units per minute
        print("jog rate =",step,absolute,self.data[j_rate])
        if not absolute == None:
            rate = absolute
        elif not step == None:
            rate = self.data[j_rate] + step
        else:return
        if rate < 0: rate = 0
        if rate > self.data[j_rate+"_max"]: rate = self.data[j_rate+"_max"]
        rate = round(rate,1)
        if self.data.angular_jog_adjustment_flag:
            self.emc.continuous_jog_velocity(None,rate)
        else:
            self.emc.continuous_jog_velocity(rate,None)
        self.data[j_rate] = rate

    # This sets the jog increments -there are three ways
    # ABSOLUTE:
    # set absolute to the absolute increment wanted
    # INDEX from INI:
    # self.data.jog_increments holds the increments from the INI file
    # do not set absolute variable
    # index_dir = 1 or -1 to set the rate higher or lower from the list
    def set_jog_increments(self,vector=None,index_dir=None,absolute=None):
        print("set jog incr")
        if self.data.angular_jog_adjustment_flag:
            incr = "angular_jog_increments"
            incr_index = "current_angular_jogincr_index"
        else:
            incr = "jog_increments"
            incr_index = "current_jogincr_index"

        if not absolute == None:
            distance = absolute
            self.widgets[incr].set_text("%f"%distance)
            self.halcomp["jog-increment-out"] = distance
            print("index jog increments",distance)
            return
        elif not index_dir == None:
            next = self.data[incr_index] + index_dir
        elif not vector == None:
            next = vector
        else: return
        end = len(self.data[incr])-1
        if next < 0: next = 0
        if next > end: next = end
        self.data[incr_index] = next
        jogincr = self.data[incr][next]
        try:
            if 'angular' in incr and not jogincr == 'continuous':
                label = jogincr + ' Degs'
            else:
                label = jogincr
            self.widgets[incr].set_text(label)
        except:
            self.show_try_errors()
        if jogincr == ("continuous"):
            distance = 0
        else:
            distance = self.parse_increment(jogincr)
        print("index jog increments",jogincr,distance)
        self.halcomp["jog-increment-out"] = distance

    def adjustment_buttons(self,widget,action,change=0):
        print("adjustment buttons")
        # is over ride adjustment selection active?
        if self.widgets.button_override.get_active():
            print("override")
            if widget == self.widgets.button_zero_origin:
                print("zero button",action)
                change = 0
                absolute = True
            elif widget == self.widgets.button_offset_origin:
                print("set at button",action)
                absolute = True
            elif widget == self.widgets.button_plus:
                print("up button",action)
                change = 1
                absolute = False
            elif widget == self.widgets.button_minus:
                print("down button",action)
                change = -1
                absolute = False
            else:return
            self.adjust_overrides(widget,action,change,absolute)

        # graphics adjustment
        elif self.widgets.button_graphics.get_active():
            inc = self.data.graphic_move_inc
            if widget == self.widgets.button_plus:
                print("up button",action)
                change = 1
            elif widget == self.widgets.button_minus:
                print("down button",action)
                change = -1
            if self.widgets.button_zoom.get_active() and action:
                print("zoom")
                if change == 1: self.zoom_in()
                else: self.zoom_out()
            elif self.widgets.button_pan_v.get_active() and action:
                print("pan vertical")
                self.widgets.gremlin.set_mouse_start(0,0)
                if change == 1: self.pan(0,-inc)
                else: self.pan(0,inc)
            elif self.widgets.button_pan_h.get_active() and action:
                print("pan horizontal")
                self.widgets.gremlin.set_mouse_start(0,0)
                if change == 1: self.pan(-inc,0)
                else: self.pan(inc,0)
            elif self.widgets.button_rotate_v.get_active() and action:
                print("rotate horiontal")
                self.widgets.gremlin.set_mouse_start(0,0)
                if change == 1: self.rotate(-inc,0)
                else: self.rotate(inc,0)
            elif self.widgets.button_rotate_h.get_active() and action:
                print("rotate horiontal")
                self.widgets.gremlin.set_mouse_start(0,0)
                if change == 1: self.rotate(0,-inc)
                else: self.rotate(0,inc)

        # user coordinate system
        elif self.widgets.button_select_system.get_active():
            if widget == self.widgets.button_plus and action:
                print("up button",action)
                change = 1
            elif widget == self.widgets.button_minus and action:
                print("down button",action)
                change = -1
            else: return
            self.change_origin_system(None,change)
        # Jogging mode (This needs to be last)
        elif self.data.mode_order[0] == self.data._MAN and self.widgets.button_jog_mode.get_active(): # manual mode and jog mode active
            # what axis is set
            if widget == self.widgets.button_zero_origin:
                print("zero button",action)
                self.zero_axis()
            elif widget == self.widgets.button_move_to:
                print("move to button",action)
                self.move_to(change)
            elif widget == self.widgets.button_plus:
                print("up button",action)
                self.do_jog(True,action)
            elif widget == self.widgets.button_minus:
                print("down button",action)
                self.do_jog(False,action)
            elif widget == self.widgets.button_offset_origin:
                self.set_axis_checks()
        elif widget == self.widgets.button_zero_origin:
            print("zero buttons")
            self.zero_axis()
        elif widget == self.widgets.button_offset_origin:
            print("set axis buttons")
            self.set_axis_checks()

    def adjust_overrides(self,widget,action,number,absolute):
            print("adjust overrides",action,number,absolute)
            # what override is selected
            if absolute:
                change = self.get_qualified_input(number,_PERCENT_INPUT)/100
            else:
                change = number
            if self.widgets.button_feed_override.get_active() and action:
                print("feed override")
                if absolute:
                    self.set_feed_override(change,absolute)
                else:
                    self.set_feed_override((change * self.data.feed_override_inc),absolute)
            elif self.widgets.button_spindle_override.get_active() and action:
                print("spindle override")
                if absolute:
                    self.set_spindle_override(change,absolute)
                else:
                    self.set_spindle_override((change * self.data.spindle_override_inc),absolute)
            elif self.widgets.button_rapid_override.get_active() and action:
                print("velocity override")
                if absolute:
                    self.set_velocity_override(change,absolute)
                else:
                    self.set_velocity_override((change * self.data.velocity_override_inc),absolute)
            elif self.widgets.button_jog_speed.get_active() and action:
                print("jog speed adjustment")
                if widget == self.widgets.button_offset_origin:
                    change = self.get_qualified_input(number)
                if absolute:
                    self.set_jog_rate(absolute = change)
                else:
                    if self.data.angular_jog_adjustment_flag:
                        self.set_jog_rate(step = (change * self.data.angular_jog_rate_inc))
                    else:
                        self.set_jog_rate(step = (change * self.data.jog_rate_inc))
            elif self.widgets.button_jog_increments.get_active() and action:
                print("jog increments adjustment")
                if widget == self.widgets.button_offset_origin:
                    change = self.get_qualified_input(number)
                if absolute:
                    self.set_jog_increments(absolute = change)
                else:
                    self.set_jog_increments(index_dir = change)

    def origin_system(self,*args):
        print("origin system button")
        value = self.widgets.button_select_system.get_active()
        self.sensitize_widgets(self.data.sensitive_origin_mode,not value)

    def change_origin_system(self,system,direction=None):
        print(system,direction)
        system_list = (0,54,55,56,57,58,59,59.1,59.2,59.3)
        current = system_list[self.data.system]
        if not system:
            if direction > 0 and not current == 59.3: self.mdi_control.set_user_system(system_list[self.data.system+1])
            elif direction < 0 and not current == 54: self.mdi_control.set_user_system(system_list[self.data.system-1])
            self.reload_plot()


    def homing(self,*args):
        print("show/hide homing buttons")
        if self.widgets.button_homing.get_active():
            if len(self.data.active_axis_buttons) > 1:
                for i in self.data.axis_list:
                    self.widgets["axis_%s"%i].set_active(False)
            for i in ('zero_origin','offset_origin','plus','minus'):
                self.widgets["button_%s"% i].set_sensitive(False)
            self.widgets.mode0.hide()
            self.widgets.mode3.show()
            #self.widgets.button_mode.set_sensitive(False)
            self.widgets.button_override.set_sensitive(False)
            self.widgets.button_graphics.set_sensitive(False)
        else:
            for i in ('zero_origin','offset_origin','plus','minus'):
                self.widgets["button_%s"% i].set_sensitive(True)
            self.widgets.mode3.hide()
            self.widgets.mode0.show()
            state = self.data.all_homed
            self.sensitize_widgets(self.data.sensitive_all_homed,state)
            self.widgets.button_override.set_sensitive(True)
            self.widgets.button_graphics.set_sensitive(True)

    def graphics(self,*args):
        print("show/hide graphics buttons")
        if self.widgets.button_graphics.get_active():
            for i in range(0,3):
                self.widgets["mode%d"% i].hide()
            self.widgets.mode5.show()
            self.widgets.vmode0.show()
            self.widgets.vmode1.hide()
            self._tempholder = []
            for name in (self.data.sensitive_graphics_mode):
                self._tempholder.append(self.widgets[name].get_sensitive())
                self.widgets[name].set_sensitive(False)
            self.widgets.vmode0.set_sensitive(True)
            self.widgets.button_plus.set_sensitive(True)
            self.widgets.button_minus.set_sensitive(True)
        else:
            self.widgets.mode5.hide()
            self.mode_changed(self.data.mode_order[0])
            for num,name in enumerate(self.data.sensitive_graphics_mode):
                if self.data.machine_on:
                    self.widgets[name].set_sensitive(True)
                else:
                    self.widgets[name].set_sensitive(self._tempholder[num])

    def override(self,*args):
        print("show/hide override buttons")
        value = self.widgets.button_override.get_active()
        self.sensitize_widgets(self.data.sensitive_override_mode,not value)
        if self.widgets.button_override.get_active():
            for i in range(0,3):
                self.widgets["mode%d"% i].hide()
            self.widgets.mode4.show()
            self.widgets.vmode0.show()
            self.widgets.vmode1.hide()
            self.widgets.button_zero_origin.set_label(_("Zero\n "))
            self.widgets.button_offset_origin.set_label(_("Set At\n "))
        else:
            self.widgets.mode4.hide()
            self.mode_changed(self.data.mode_order[0])
            self.widgets.button_zero_origin.set_label(_(" Zero Origin"))
            self.widgets.button_offset_origin.set_label(_("Offset Origin"))

    # search for and set up user requested message system.
    # status displays on the statusbat and requires no acknowledge.
    # dialog displays a GTK dialog box with yes or no buttons
    # okdialog displays a GTK dialog box with an ok button
    # dialogs require an answer before focus is sent back to main screen
    def message_setup(self):
        if not self.inifile:
            return
        m_boldtext = self.inifile.findall("DISPLAY", "MESSAGE_BOLDTEXT")
        m_text = self.inifile.findall("DISPLAY", "MESSAGE_TEXT")
        m_type = self.inifile.findall("DISPLAY", "MESSAGE_TYPE")
        m_pinname = self.inifile.findall("DISPLAY", "MESSAGE_PINNAME")
        if len(m_text) != len(m_type):
            print(_("**** Gscreen ERROR:    Invalid message configuration (missing text or type) in INI File [DISPLAY] section"))
        if len(m_text) != len(m_pinname):
            print(_("**** Gscreen ERROR:    Invalid message configuration (missing pinname) in INI File [DISPLAY] section"))
        if len(m_text) != len(m_boldtext):
            print(_("**** Gscreen ERROR:    Invalid message configuration (missing boldtext) in INI File [DISPLAY] section"))
        for bt,t,c ,name in zip(m_boldtext,m_text, m_type,m_pinname):
            #print bt,t,c,name
            if not ("status" in c) and not ("dialog" in c) and not ("okdialog" in c):
                print(_("**** Gscreen ERROR:    invalid message type (%s)in INI File [DISPLAY] section"% c))
                continue
            if not name == None:
                # this is how we make a pin that can be connected to a callback 
                self.data['name'] = hal_glib.GPin(self.halcomp.newpin(name, hal.HAL_BIT, hal.HAL_IN))
                self.data['name'].connect('value-changed', self.on_printmessage,name,bt,t,c)
                if ("dialog" in c):
                    self.halcomp.newpin(name+"-waiting", hal.HAL_BIT, hal.HAL_OUT)
                    if not ("ok" in c):
                        self.halcomp.newpin(name+"-response", hal.HAL_BIT, hal.HAL_OUT)

    # display dialog
    def warning_dialog(self,message, displaytype, secondary=None,pinname=None):
        if displaytype:
            dialog = Gtk.MessageDialog(self.widgets.window1,
                0,
                Gtk.MessageType.INFO, Gtk.ButtonsType.OK,message,
                destroy_with_parent = True)
        else:   
            dialog = Gtk.MessageDialog(self.widgets.window1,
               0,
               Gtk.MessageType.QUESTION, Gtk.ButtonsType.YES_NO,message,
               destroy_with_parent = True)
        # if there is a secondary message then the first message text is bold
        if secondary:
            dialog.format_secondary_text(secondary)
        dialog.show_all()
        try:
            if "dialog_return" in dir(self.handler_instance):
                dialog.connect("response", self.handler_instance.dialog_return,self,displaytype,pinname)
            else:
                dialog.connect("response", self.dialog_return,displaytype,pinname)
        except:
            dialog.destroy()
            raise NameError (_('Dialog error - Is the dialog handler missing from the handler file?'))
        if pinname == "TOOLCHANGE":
            dialog.set_title(_("Manual Toolchange"))
        else:
            dialog.set_title(_("Operator Message"))

    # message dialog returns a response here
    # This includes the manual tool change dialog
    # We know this by the pinname being called 'TOOLCHANGE' 
    def dialog_return(self,widget,result,dialogtype,pinname):
        if pinname == "TOOLCHANGE":
            self.halcomp["tool-changed"] = True
            widget.destroy()
            try:
                self.widgets.statusbar1.remove_message(self.statusbar_id,self.data.tool_message)
            except:
                self.show_try_errors()
            return
        if not dialogtype: # yes/no dialog
            if result == Gtk.ResponseType.YES:result = True
            else: result = False
            if pinname:
                self.halcomp[pinname + "-response"] = result
        if pinname:
            self.halcomp[pinname + "-waiting"] = False
        widget.destroy()

    # dialog is used for choosing the run-at-line position
    def launch_restart_dialog(self,widget):
        self.restart_dialog()

    # dialog for manually calling a tool
    def restart_dialog(self):
        if self.data.restart_dialog: return
        if "restart_dialog_return" in dir(self.handler_instance):
            return_method = self.handler_instance.restart_dialog_return
        else:
            return_method = self.restart_dialog_return
        self.data.restart_dialog = Gtk.Dialog(_("Restart Entry"),
                   self.widgets.window1,
                   0, destroy_with_parent = True)
        label = Gtk.Label(_("Restart Entry"))
        label.modify_font(pango.FontDescription("sans 20"))
        self.data.restart_dialog.vbox.pack_start(label, False, False, 0)
        calc = gladevcp.Calculator()
        self.data.restart_dialog.vbox.add(calc)
        calc.set_value("%d"%self.data.last_line)
        calc.set_property("font","sans 20")
        calc.set_editable(True)
        calc.integer_entry_only(True)
        calc.num_pad_only(True)
        calc.entry.connect("activate",return_method,True,calc)
        # add additional buttons
        upbutton = Gtk.Button.new_with_mnemonic(_("_Up     "))
        upbutton.set_image(Gtk.Image.new_from_icon_name("go-up", Gtk.IconSize.BUTTON))
        downbutton = Gtk.Button.new_with_mnemonic(_("_Down"))
        downbutton.set_image(Gtk.Image.new_from_icon_name("go-down", Gtk.IconSize.BUTTON))
        enterbutton = Gtk.Button.new_with_mnemonic(_("_Jump to"))
        enterbutton.set_image(Gtk.Image.new_from_icon_name("go-jump", Gtk.IconSize.BUTTON))
        calc.table.attach(upbutton,3,4,1,2)
        calc.table.attach(downbutton,3,4,2,3)
        calc.table.attach(enterbutton,3,4,3,4)
        upbutton.connect("clicked",self.restart_up,calc)
        downbutton.connect("clicked",self.restart_down,calc)
        enterbutton.connect("clicked", self.restart_set_line,calc)

        self.data.restart_dialog.parse_geometry("410x400+0+0")
        self.data.restart_dialog.show_all()
        self.data.restart_dialog.connect("response", return_method,calc)

    # either start the gcode at the line specified or cancel
    def restart_dialog_return(self,widget,result,calc):
        value = 0
        if not result == Gtk.ResponseType.REJECT:
            value = calc.get_value()
            if value == None:value = 0
        self.widgets.gcode_view.set_line_number(value)
        self.add_alarm_entry(_("Ready to Restart program from line %d"%value))
        self.update_restart_line(value)
        self.data.restart_dialog.destroy()
        self.data.restart_dialog = None

    # adds the embedded object to a notebook tab or box
    def _dynamic_tab(self, widget, text):
        s = Gtk.Socket()
        try:
            widget.append_page(s, Gtk.Label(" " + text + " "))
        except:
            try:
                widget.pack_end(s,True,True,0)
            except:
                return None
        return s.get_id()

    # Check INI file for embed commands
    # NAME is used as the tab label if a notebook is used
    # LOCATION is the widgets name from the gladefile.
    # COMMAND is the actual program command
    # if no location is specified the main notebook is used
    def set_dynamic_tabs(self):
        from subprocess import Popen

        if not self.inifile:
            return

        tab_names = self.inifile.findall("DISPLAY", "EMBED_TAB_NAME")
        tab_location = self.inifile.findall("DISPLAY", "EMBED_TAB_LOCATION")
        tab_cmd   = self.inifile.findall("DISPLAY", "EMBED_TAB_COMMAND")

        if len(tab_names) != len(tab_cmd):
            print (_("Invalid embedded tab configuration")) # Complain somehow
        if len(tab_location) != len(tab_names):
            for num,i in enumerate(tab_names):
                try:
                    if tab_location[num]:
                        continue
                except:
                    tab_location.append("notebook_mode")

        for t,c ,name in zip(tab_names, tab_cmd,tab_location):
            nb = self.widgets[name]
            xid = self._dynamic_tab(nb, t)
            if not xid: continue
            cmd = c.replace('{XID}', str(xid))
            child = Popen(cmd.split())
            self._dynamic_childs[xid] = child
            nb.show_all()

    # Gotta kill the embedded processes when gscreen closes
    def kill_dynamic_childs(self):
        for c in list(self._dynamic_childs.values()):
            c.terminate()

    # finds the postgui file name and INI file path
    def postgui(self):
        postgui_halfile = self.inifile.findall("HAL", "POSTGUI_HALFILE") or None
        return postgui_halfile,sys.argv[2]

    # zooms in a set amount (set deep in gremlin)
    def zoom_in(self,*args):
        self.widgets.gremlin.zoom_in()

    def zoom_out(self,*args):
        self.widgets.gremlin.zoom_out()

    def set_fullscreen1(self, data):
        self.prefs.putpref('fullscreen1', data, bool)
        self.data.fullscreen1 = data
        if data:
            self.widgets.window1.fullscreen()
        else:
            self.widgets.window1.unfullscreen()

    def set_show_offsets(self, data):
        self.prefs.putpref('show_offsets', data, bool)
        self.data.show_offsets = data
        try:
            self.widgets.gremlin.show_offsets = data
        except:
            self.show_try_errors()

    def set_show_dtg(self, data):
        self.prefs.putpref('show_dtg', data, bool)
        try:
            self.widgets.gremlin.set_property('show_dtg',data)
        except:
            self.show_try_errors()

    def set_diameter_mode(self, data):
        print("toggle diameter mode")
        self.data.diameter_mode = data
        self.prefs.putpref('diameter_mode', data, bool)
        try:
            self.widgets.gremlin.set_property('show_lathe_radius',not data)
        except:
            self.show_try_errors()

    # returns the separate RGB color numbers from the color widget
    def convert_to_rgb(self,spec):
        color =  spec.to_string()
        temp = color.strip("#")
        r = temp[0:4]
        g = temp[4:8]
        b = temp[8:]
        return (int(r,16),int(g,16),int(b,16))

    def set_rel_color(self):
        self.data.rel_color = self.convert_to_rgb(self.widgets.rel_colorbutton.get_color())
        self.prefs.putpref('rel_textcolor', self.widgets.rel_colorbutton.get_color().to_string(),str)

    def set_abs_color(self):
        self.data.abs_color = self.convert_to_rgb(self.widgets.abs_colorbutton.get_color())
        self.prefs.putpref('abs_textcolor', self.widgets.abs_colorbutton.get_color().to_string(),str)

    def set_dtg_color(self):
        self.data.dtg_color = self.convert_to_rgb(self.widgets.dtg_colorbutton.get_color())
        self.prefs.putpref('dtg_textcolor', self.widgets.dtg_colorbutton.get_color().to_string(),str)

    def set_unlock_code(self):
        self.prefs.putpref('unlock_code', self.data.unlock_code,str)

    # toggles gremlin's different views
    # if in lathe mode only P, Y and Y2 available
    def toggle_view(self):
        dist = self.widgets.gremlin.get_zoom_distance()
        def shift():
            a = self.data.plot_view[0]
            b = self.data.plot_view[1]
            c = self.data.plot_view[2]
            d = self.data.plot_view[3]
            e = self.data.plot_view[4]
            f = self.data.plot_view[5]
            self.data.plot_view = (b,c,d,e,f,a)
        shift()
        if self.data.lathe_mode:
            while not self.data.plot_view[0].lower() in("p","y","y2"):
                shift()
        elif self.data.plot_view[0].lower() == "y2":
                shift()
        self.widgets.gremlin.set_property('view',self.data.plot_view[0])
        self.prefs.putpref('view', self.data.plot_view, tuple)
        self.widgets.gremlin.set_zoom_distance(dist)

    # toggle a large graphics view / gcode view
    def set_full_graphics_view(self,data):
        print("full view",data)
        if data:
            print("enlarge")
            self.data.full_graphics = True
            self.widgets.notebook_mode.hide()
            self.widgets.dro_frame.hide()
            self.widgets.gremlin.set_property('enable_dro',True)
        else:
            print("shrink")
            self.data.full_graphics = False
            self.widgets.notebook_mode.show()
            self.widgets.dro_frame.show()
            self.widgets.gremlin.set_property('enable_dro',False)

    # enlargen the Gcode box while in edit mode
    def edit_mode(self,data):
        print("edit mode pressed",data)
        self.sensitize_widgets(self.data.sensitive_edit_mode,not data)
        if data:
            self.widgets.mode2.hide()
            self.widgets.mode6.show()
            self.widgets.dro_frame.hide()
            self.widgets.gcode_view.set_sensitive(1)
            self.data.edit_mode = True
            self.widgets.show_box.hide()
            self.widgets.notebook_mode.show()
        else:
            self.widgets.mode6.hide()
            self.widgets.mode2.show()
            self.widgets.dro_frame.show()
            self.widgets.gcode_view.set_sensitive(0)
            self.data.edit_mode = False
            self.widgets.show_box.show()

    def set_dro_units(self, data, save=True):
        print("toggle dro units",self.data.dro_units,data)
        if data == self.data._IMPERIAL:
            print("switch to imperial")
            self.status.dro_inch(1)
            self.widgets.gremlin.set_property('metric_units',False)
            try:
                self.widgets.offsetpage1.set_to_inch()
            except:
                self.show_try_errors()
        else:
            print("switch to mm")
            self.status.dro_mm(1)
            self.widgets.gremlin.set_property('metric_units',True)
            try:
                self.widgets.offsetpage1.set_to_mm()
            except:
                self.show_try_errors()
        self.data.dro_units = data
        if save:
            self.prefs.putpref('dro_is_metric', data, bool)

    def toggle_optional_stop(self):
        print("option stop")
        self.set_optional_stop(self.widgets.button_option_stop.get_active())

    def set_optional_stop(self,data):
        self.prefs.putpref('opstop', data, bool)
        self.data.op_stop = data
        self.emc.opstop(data)

    def toggle_block_delete(self):
        self.set_block_delete(self.widgets.button_block_delete.get_active())

    def set_block_delete(self,data):
        print("block delete")
        self.prefs.putpref('blockdel', data, bool)
        self.data.block_del = data
        self.emc.blockdel(data)

    def save_edit(self):
        print("edit")

    # helper method to block and unblock GTK widget signals
    def block(self,widget_name):
        self.widgets["%s"%(widget_name)].handler_block(self.data["_sighandler_%s"% (widget_name)])

    def unblock(self,widget_name):
         self.widgets["%s"%(widget_name)].handler_unblock(self.data["_sighandler_%s"% (widget_name)])

    # update the global variable of active axis buttons
    # if in jogging or homing mode, only one axis can be active at once
    # update the related axis HAL pins
    def update_active_axis_buttons(self,widget):
        count = 0;temp = []
        self.data.active_axis_buttons = []
        for i in self.data.axis_list:
            num = "xyzabcuvws".index(i)
            if self.widgets.button_jog_mode.get_active() or self.widgets.button_homing.get_active():
                if not self.widgets["axis_%s"%i] == widget:
                    # unselect axis / HAL pin
                    self.block("axis_%s"%i)
                    self.widgets["axis_%s"%i].set_active(False)
                    self.unblock("axis_%s"%i)
                    continue
            if self.widgets["axis_%s"%i].get_active():
                count +=1
                axisnum = num
                self.data.active_axis_buttons.append((i,num))
        if count == 0: self.data.active_axis_buttons.append((None,None))
        # check and update jogging buttons
        self.jog_mode()

    # adjust sensitivity and labels of buttons
    def jog_mode(self):
        print("jog mode:",self.widgets.button_jog_mode.get_active())
        # if multiple axes selected - unselect all of them
        if len(self.data.active_axis_buttons) > 1 and self.widgets.button_jog_mode.get_active():
            for i in self.data.axis_list:
                self.widgets["axis_%s"%i].set_active(False)
        if self.widgets.button_jog_mode.get_active():
            self.widgets.button_move_to.set_label("Goto Position")
            self.emc.set_manual_mode()
        else:
            self.widgets.button_move_to.set_label("")
        self.update_hal_jog_pins()
        self.update_hal_override_pins()

    # do some checks then jog selected axis or start spindle
    def do_jog(self,direction,action):
        # if manual mode, if jogging
        # if only one axis button pressed
        # jog positive  at selected rate
        if self.data.mode_order[0] == self.data._MAN:
            if len(self.data.active_axis_buttons) > 1:
                self.notify(_("INFO:"),_("Can't jog multiple axis"),INFO_ICON)
                print(self.data.active_axis_buttons)
            elif self.data.active_axis_buttons[0][0] == None:
                self.notify(_("INFO:"),_("No axis selected to jog"),INFO_ICON)
            else:
                print("Jog axis %s" % self.data.active_axis_buttons[0][0])
                if not self.data.active_axis_buttons[0][0] == "s":
                    if not action: cmd = 0
                    elif direction: cmd = 1
                    else: cmd = -1
                    self.emc.jogging(1)
                    if self.data.active_axis_buttons[0][0] in('a','b','c'):
                        jogincr = self.data.angular_jog_increments[self.data.current_angular_jogincr_index]
                    else:
                        jogincr = self.data.jog_increments[self.data.current_jogincr_index]
                    print(jogincr)
                    if jogincr == ("continuous"): # continuous jog
                        print("active axis jog:",self.data.active_axis_buttons[0][1])
                        self.emc.continuous_jog(self.data.active_axis_buttons[0][1],cmd)
                    else:
                        print("jog incremental")
                        if cmd == 0: return # don't want release of button to stop jog
                        distance = self.parse_increment(jogincr)
                        self.emc.incremental_jog(self.data.active_axis_buttons[0][1],cmd,distance)

    def do_key_jog(self,axis,direction,action):
        if self.data._JOG in self.check_mode(): # jog mode active:
                    if not action: cmd = 0
                    elif direction: cmd = 1
                    else: cmd = -1
                    self.emc.jogging(1)
                    print(self.data.jog_increments[self.data.current_jogincr_index])
                    if self.data.jog_increments[self.data.current_jogincr_index] == ("continuous"): # continuous jog
                        print("active axis jog:",axis)
                        self.emc.continuous_jog(axis,cmd)
                    else:
                        print("jog incremental")
                        if cmd == 0: return # don't want release of button to stop jog
                        self.mdi_control.mdi.emcstat.poll()
                        if self.mdi_control.mdi.emcstat.state != 1: return
                        jogincr = self.data.jog_increments[self.data.current_jogincr_index]
                        distance = self.parse_increment(jogincr)
                        self.emc.incremental_jog(axis,cmd,distance)

    def on_focus_out(self, widget, data=None):
        self.emcstat.poll()
        command = linuxcnc.command()
        if self.emcstat.enabled and self.emcstat.task_mode == linuxcnc.MODE_MANUAL and self.emcstat.current_vel > 0:
            # cancel any joints jogging
            for jnum in range(self.emcstat.joints):
                command.jog(linuxcnc.JOG_STOP, 0, jnum)

    # spindle control
    def spindle_adjustment(self,direction,action):
        if action and not self.widgets.s_display_fwd.get_active() and not self.widgets.s_display_rev.get_active():
            self.notify(_("INFO:"),_("No direction selected for spindle"),INFO_ICON)
            return
        if direction and action:
            if self.data.spindle_speed:
                self.emc.spindle_faster(1)
            elif self.widgets.s_display_fwd.get_active():
               self.emc.spindle_forward(1,self.data.spindle_start_rpm)
            else:
                self.emc.spindle_reverse(1,self.data.spindle_start_rpm)
            print(direction,action)
        elif not direction and action:
            if self.data.spindle_speed:
                if self.data.spindle_speed >100:
                    self.emc.spindle_slower(1)
                else:
                    self.emc.spindle_off(1)

    # feeds to a position (while in manual mode)
    def do_jog_to_position(self,data):
        if len(self.data.active_axis_buttons) > 1:
            self.notify(_("INFO:"),_("Can't jog multiple axis"),INFO_ICON)
            print(self.data.active_axis_buttons)
        elif self.data.active_axis_buttons[0][0] == None:
            self.notify(_("INFO:"),_("No axis selected to move"),INFO_ICON)
        else:
            if not self.data.active_axis_buttons[0][0] == "s":
                if self.data.active_axis_buttons[0][0] in('a','b','c'):
                    rate = self.data.angular_jog_rate
                    pos = self.get_qualified_input(data,switch=_DEGREE_INPUT)
                else:
                    rate = self.data.jog_rate
                    pos = self.get_qualified_input(data)
                self.mdi_control.go_to_position(self.data.active_axis_buttons[0][0],pos,rate)

    def adjust_spindle_rpm(self, rpm, direction=None):
            # spindle control
             if direction == None:
                direction = self.data.spindle_dir
             if direction > 0:
                print("forward")
                self.emc.spindle_forward(1, float(rpm))
             elif direction < 0:
                print("reverse")
                self.emc.spindle_reverse(1, float(rpm))
             else:
                self.emc.spindle_off(1)

    # shows the second glade file panel
    def toggle_screen2(self):
        self.data.use_screen2 = self.widgets.use_screen2.get_active()
        if self.screen2:
            if self.data.use_screen2:
                self.widgets.window2.show()
            else:
                self.widgets.window2.hide()
        self.prefs.putpref('use_screen2', self.data.use_screen2, bool)

    # This converts and qualifies the input
    # eg for diameter, metric or percentage
    def get_qualified_input(self,raw = 0,switch = None):
        print("RAW input:",raw)
        if switch in(_DEGREE_INPUT, _SPINDLE_INPUT):
            return raw
        elif switch == _PERCENT_INPUT:
            return round(raw,2)
        else:
            g21 = False
            if "G21" in self.data.active_gcodes: g21 = True

            # metric DRO - imperial mode
            if self.data.dro_units == self.data._MM:
                if not g21:
                    raw = raw / 25.4
            # imperial DRO - metric mode
            elif g21:
                raw = raw * 25.4

            if switch == "x" and self.data.diameter_mode:
                print("convert from diameter")
                raw = raw / 2.0
        print("Qualified input:",raw)
        return raw

    def unhome_all(self):
        self.emc.unhome_all(1)

    def home_all(self):
        self.emc.home_all(1)

    # do some checks first the home the selected axis
    def home_selected(self):
        print("home selected")
        if len(self.data.active_axis_buttons) > 1:
            self.notify(_("INFO:"),_("Can't home multiple axis - select HOME ALL instead"),INFO_ICON)
            print(self.data.active_axis_buttons)
        elif self.data.active_axis_buttons[0][0] == None:
            self.notify(_("INFO:"),_("No axis selected to home"),INFO_ICON)
        else:
            print("home axis %s" % self.data.active_axis_buttons[0][0])
            self.emc.home_selected(self.data.active_axis_buttons[0][1])

    def unhome_selected(self):
        if len(self.data.active_axis_buttons) > 1:
            self.notify(_("INFO:"),_("Can't unhome multiple axis"),INFO_ICON)
            print(self.data.active_axis_buttons)
        elif self.data.active_axis_buttons[0][0] == None:
            self.notify(_("INFO:"),_("No axis selected to unhome"),INFO_ICON)
        else:
            print("unhome axis %s" % self.data.active_axis_buttons[0][0])
            self.emc.unhome_selected(self.data.active_axis_buttons[0][1])

    # Touchoff the axis zeroing it
    # reload the plot to update the display
    def zero_axis(self):
        if self.data.active_axis_buttons[0][0] == None:
            self.notify(_("INFO:"),_("No axis selected for origin zeroing"),INFO_ICON)
        # if an axis is selected then set it
        for i in self.data.axis_list:
            if self.widgets["axis_%s"%i].get_active():
                print("zero %s axis" %i)
                self.mdi_control.set_axis(i,0)
                self.reload_plot()

    # touchoff - setting the axis to the input
    def set_axis_checks(self):
        if self.data.active_axis_buttons[0][0] == None:
            self.notify(_("INFO:"),_("No axis selected for origin touch-off"),INFO_ICON)
            return
        self.launch_numerical_input("on_offset_origin_entry_return")

    def tool_touchoff_checks(self):
        if len(self.data.active_axis_buttons) > 1:
            self.notify(_("INFO:"),_("Can't tool touch-off multiple axes"),INFO_ICON)
            return
        if self.data.active_axis_buttons[0][0] == None:
            self.notify(_("INFO:"),_("No axis selected for tool touch-off"),INFO_ICON)
            return
        self.launch_numerical_input("on_tool_offset_entry_return")

    # move axis to a position (while in manual mode)
    def move_to(self,data):
        if self.data.mode_order[0] == self.data._MAN:# if in manual mode
            if self.widgets.button_jog_mode.get_active(): # jog mode active
                print("jog to position")
                self.do_jog_to_position(data)

    def clear_plot(self):
        self.widgets.gremlin.clear_live_plotter()

    def pan(self,x,y):
        self.widgets.gremlin.pan(x,y)

    def rotate(self,x,y):
        self.widgets.gremlin.rotate_view(x,y)

    def reload_plot(self):
        print("reload plot")
        self.widgets.hal_action_reload.emit("activate")

    def toggle_mist(self):
        if self.data.mist:
            self.emc.mist_off(1)
        else:
            self.emc.mist_on(1)

    def toggle_flood(self):
        if self.data.flood:
            self.emc.flood_off(1)
        else:
            self.emc.flood_on(1)

    def toggle_ignore_limits(self,*args):
        print("over ride limits")
        self.emc.override_limits(1)

    # toggle the tool editor page forward
    # reload the page when doing this
    # If the user specified a tool editor spawn it. 
    def reload_tooltable(self):
        # show the tool table page or return to the main page
        if not self.widgets.notebook_main.get_current_page() == 3:
            self.widgets.notebook_main.set_current_page(3)
        else:
            self.widgets.notebook_main.set_current_page(0)
            return
        # set the tooltable path from the INI file and reload it
        path = os.path.join(CONFIGPATH,self.data.tooltable)
        print("tooltable:",path)
        self.widgets.tooledit1.set_filename(path)
        # see if user requested an external editor and spawn it 
        editor = self.data.tooleditor
        if not editor == None:
            res = os.spawnvp(os.P_WAIT, editor, [editor, path])
            if res:
                self.notify(_("Error Message"),_("Tool editor error - is the %s editor available?"% editor,ALERT_ICON,3))
        # tell linuxcnc that the tooltable may have changed
        self.emc.reload_tooltable(1)

    # toggle thru the DRO large display
    def dro_toggle(self):
        print("toggle axis display")
        a = self.data.display_order[0]
        b = self.data.display_order[1]
        c = self.data.display_order[2]
        self.data.display_order = (c,a,b)
        self.prefs.putpref('display_order', self.data.display_order, tuple)
        if self.data.display_order[2] == _ABS:
            self.widgets.gremlin.set_property('use_relative',False)
        else:
            self.widgets.gremlin.set_property('use_relative',True)

    # adjust the screen as per each mode toggled 
    def mode_changed(self,mode):

        if mode == self.data._MAN: 
            self.widgets.vmode0.show()
            self.widgets.vmode1.hide()
            self.widgets.notebook_mode.hide()
            self.widgets.hal_mdihistory.hide()
            self.widgets.button_homing.show()
            self.widgets.dro_frame.show()
            self.widgets.spare.hide()
        elif mode == self.data._MDI:
            if self.widgets.button_homing.get_active():
                self.widgets.button_homing.emit("clicked")
            if self.data.plot_hidden:
                self.toggle_offset_view()
            self.emc.set_mdi_mode()
            self.widgets.hal_mdihistory.show()
            self.widgets.vmode0.show()
            self.widgets.vmode1.hide()
            self.widgets.notebook_mode.hide()
        elif mode == self.data._AUTO:
            self.widgets.vmode0.hide()
            self.widgets.vmode1.show()
            if self.data.full_graphics:
                self.widgets.notebook_mode.hide()
            else:
                self.widgets.notebook_mode.show()
            self.widgets.hal_mdihistory.hide()
        if not mode == self.data._MAN:
            self.widgets.button_jog_mode.set_active(False)
            self.widgets.button_homing.set_active(False)
            self.widgets.button_homing.hide()
            self.widgets.spare.show()
        for i in range(0,3):
            if i == mode:
                self.widgets["mode%d"% i].show()
            else:
                self.widgets["mode%d"% i].hide()

    def change_theme(self, theme):
        self.prefs.putpref('gtk_theme', theme, str)
        if theme == 'Local Config Theme':
                theme = self.data.local_theme
        elif theme == "Follow System Theme":
            theme = self.data.system_theme
        if theme == None: return
        settings = Gtk.Settings.get_default()
        settings.set_string_property("gtk-theme-name", theme, "")

    # check linuxcnc for status, error and then update the readout
    def timer_interrupt(self):
        self.emc.mask()
        self.emcstat = linuxcnc.stat()
        self.emcerror = linuxcnc.error_channel()
        self.emcstat.poll()
        self.data.task_mode = self.emcstat.task_mode 
        self.status.periodic()
        self.data.system = self.status.get_current_system()
        e = self.emcerror.poll()
        if e:
            kind, text = e
            print(kind,text)
            if "joint" in text:
                for letter in self.data.axis_list:
                    axnum = "xyzabcuvws".index(letter)
                    text = text.replace( "joint %d"%axnum,"Axis %s"%letter.upper() )
            if kind in (linuxcnc.NML_ERROR, linuxcnc.OPERATOR_ERROR):
                self.notify(_("Error Message"),text,ALERT_ICON,3)
            elif kind in (linuxcnc.NML_TEXT, linuxcnc.OPERATOR_TEXT):
                self.notify(_("Message"),text,INFO_ICON,3)
            elif kind in (linuxcnc.NML_DISPLAY, linuxcnc.OPERATOR_DISPLAY):
                self.notify(_("Message"),text,INFO_ICON,3)
        self.emc.unmask()
        if "periodic" in dir(self.handler_instance):
            self.handler_instance.periodic()
        else:
            self.update_position()
        return True

    # update the whole display
    def update_position(self,*args):
        self.update_mdi_spindle_button()
        self.update_spindle_bar()
        self.update_dro()
        self.update_active_gcodes()
        self.update_active_mcodes()
        self.update_aux_coolant_pins()
        self.update_feed_speed_label()
        self.update_tool_label()
        self.update_coolant_leds()
        self.update_estop_led()
        self.update_machine_on_led()
        self.update_limit_override()
        self.update_override_label()
        self.update_jog_rate_label()
        self.update_mode_label()
        self.update_units_button_label()

    # spindle controls
    def update_mdi_spindle_button(self):
        try:
            self.widgets.at_speed_label.set_label(_("%d RPM"%abs(self.data.spindle_speed)))
        except Exception as e:
            pass
        label = self.widgets.spindle_control.get_label()
        speed = self.data.spindle_speed
        if speed == 0 and not label == _("Start"):
            temp = _("Start")
        elif speed and not label == _("Stop"):
            temp = _("Stop")
        else: return
        self.widgets.spindle_control.set_label(temp)

    def update_spindle_bar(self):
        self.widgets.s_display.set_value(abs(self.halcomp["spindle-readout-in"]))
        self.widgets.s_display.set_target_value(abs(self.data.spindle_speed))
        try:
            self.widgets.s_display2.set_value(abs(self.data.spindle_speed))
        except:
            global update_spindle_bar_error_ct,update_spindle_bar_error_ct_max
            if update_spindle_bar_error_ct < update_spindle_bar_error_ct_max:
                print("%2d/%2d update_spindle_bar error"%(
                       update_spindle_bar_error_ct,update_spindle_bar_error_ct_max))
                self.show_try_errors()
                update_spindle_bar_error_ct += 1

    def update_dro(self):
        # DRO
        for i in self.data.axis_list:
            for j in range (0,3):
                current = self.data.display_order[j]
                attr = pango.AttrList()
                if current == _ABS:
                    color = self.data.abs_color
                    data = self.data["%s_abs"%i]
                    #text = "%+ 10.4f"% self.data["%s_abs"%i]
                    label = "ABS"
                elif current == _REL:
                    color = self.data.rel_color
                    data = self.data["%s_rel"%i]
                    #text = "%+ 10.4f"% self.data["%s_rel"%i]
                    label= "REL"
                elif current == _DTG:
                    color = self.data.dtg_color
                    data = self.data["%s_dtg"%i]
                    #text = "%+ 10.4f"% self.data["%s_dtg"%i]
                    label = "DTG"
                #if j == 2:
                #    if self.data.highlight_major:
                #        hlcolor = self.data.highlight_color
                ##        bg_color = pango.AttrBackground(hlcolor[0],hlcolor[1],hlcolor[2], 0, -1)
                #        attr.insert(bg_color)
                #    size = pango.AttrSize(30000, 0, -1)
                #    attr.insert(size)
                #    weight = pango.AttrWeight(600, 0, -1)
                ##    attr.insert(weight)
                #fg_color = pango.AttrForeground(color[0],color[1],color[2], 0, 11)
                #attr.insert(fg_color)
                #TODO: gtk3
                self.widgets["%s_display_%d"%(i,j)].set_attributes(attr)
                h = " "
                if current == _ABS and self.data["%s_is_homed"% i]: h = "*"
                if self.data.diameter_mode and i == 'x': data = data * 2.0
                if self.data.dro_units == self.data._MM:
                    text = "%s% 10.3f"% (h,data)
                else:
                    text = "%s% 9.4f"% (h,data)
                self.widgets["%s_display_%d"%(i,j)].set_text(text)
                self.widgets["%s_display_%d"%(i,j)].set_alignment(0,.5)
                self.widgets["%s_display_%d_label"%(i,j)].set_alignment(1,.5)
                self.widgets["%s_display_%d_label"%(i,j)].set_text(label)

    def update_active_gcodes(self):
        # active codes
        active_g = " ".join(self.data.active_gcodes)
        self.widgets.active_gcodes_label.set_label("%s   "% active_g)

    def update_active_mcodes(self):
        self.widgets.active_mcodes_label.set_label(" ".join(self.data.active_mcodes))

    def update_aux_coolant_pins(self):
        # control aux_coolant  - For Dave Armstrong
        m7 = m8 = False
        self.halcomp["aux-coolant-m8-out"] = False
        self.halcomp["mist-coolant-out"] = False
        self.halcomp["aux-coolant-m7-out"] = False
        self.halcomp["flood-coolant-out"] = False
        if self.data.mist:
            if self.widgets.aux_coolant_m7.get_active():
               self.halcomp["aux-coolant-m7-out"] = True
            else:
                self.halcomp["mist-coolant-out"] = True
        if self.data.flood:
            if self.widgets.aux_coolant_m8.get_active():
                self.halcomp["aux-coolant-m8-out"] = True
            else:
                self.halcomp["flood-coolant-out"] = True

    def update_feed_speed_label(self):
        data = self.data.velocity
        if self.data.IPR_mode:
            try:
                data = data/abs(self.halcomp["spindle-readout-in"])
            except:
                data = 0
        if self.data.dro_units == self.data._MM:
            text = "%.2f"% (data)
        else:
            text = "%.3f"% (data)
        self.widgets.active_feed_speed_label.set_label("F%s    S%s   V%s"% (self.data.active_feed_command,
                            self.data.active_spindle_command,text))

    def update_tool_label(self):
        # coordinate system:
        systemlabel = (_("Machine"),"G54","G55","G56","G57","G58","G59","G59.1","G59.2","G59.3")
        tool = str(self.data.tool_in_spindle)
        if tool == None: tool = "None"
        self.widgets.system.set_text((_("Tool %(t)s     %(l)s")%
             ({'t':tool,
               'l':systemlabel[int(self.data.system)]
             })))

    def update_coolant_leds(self):
        # coolant
        self.widgets.led_mist.set_active(self.data.mist)
        self.widgets.led_flood.set_active(self.data.flood)

    def update_estop_led(self):
        # estop
        self.widgets.led_estop.set_active(self.data.estopped)

    def update_machine_on_led(self):
        self.widgets.led_on.set_active(self.data.machine_on)

    def update_limit_override(self):
        # ignore limits led
        self.widgets.led_ignore_limits.set_active(self.data.or_limits)

    def update_override_label(self):
        # overrides
        self.widgets.fo.set_text("FO: %d%%"%(round(self.data.feed_override,2)*100))
        self.widgets.so.set_text("SO: %d%%"%(round(self.data.spindle_override,2)*100))
        self.widgets.mv.set_text("VO: %d%%"%(round((self.data.velocity_override),2) *100))

    # we need to check if the current units is in the basic machine units - convert if nesassary.
    # then set the display according to the current display units.
    def update_jog_rate_label(self):
        rate = round(self.status.convert_units(self.data.jog_rate),2)
        if self.data.dro_units == self.data._MM:
            text = _("%4.2f mm/min")% (rate)
        else:
            text = _("%3.2f IPM")% (rate)
        self.widgets.jog_rate.set_text(text)
        try:
            text = _("%4.2f DPM")% (self.data.angular_jog_rate)
            self.widgets.angular_jog_rate.set_text(text)
        except:
            pass

    def update_mode_label(self):
        # Mode / view
        modenames = self.data.mode_labels
        time = strftime("%a, %d %b %Y  %I:%M:%S %P    ", localtime())
        self.widgets.mode_label.set_label( _("%(n)s   View -%(v)s               %(t)s")%
              ({'n':modenames[self.data.mode_order[0]],
                'v':self.data.plot_view[0],
                't':time
              }))

    def update_units_button_label(self):
        label = self.widgets.metric_select.get_label()
        data = self.data.dro_units
        if data and not label == _(" mm "):
            temp = _(" mm ")
        elif data == 0 and not label == _("Inch"):
            temp = _("Inch")
        else: return
        self.widgets.metric_select.set_label(temp)

    def update_hal_jog_pins(self):
         for i in self.data.axis_list:
            if self.widgets.button_jog_mode.get_active() and self.widgets["axis_%s"%i].get_active():
                self.halcomp["jog-enable-%s-out"%i] = True
            else:
                self.halcomp["jog-enable-%s-out"%i] = False
            if self.widgets.button_jog_mode.get_active():
                self.halcomp["jog-enable-out"] = True
            else:
                self.halcomp["jog-enable-out"] = False
            try:
                self.widgets.led_jog_mode.set_active(self.halcomp["jog-enable-out"])
            except:
                pass

    # These pins set and unset enable pins for override adjustment
    # only true when the screen button is true and not in jog mode 
    # (because jog mode may use the encoder for jogging)
    def update_hal_override_pins(self):
        jogmode = not(self.widgets.button_jog_mode.get_active())
        fo = self.widgets.button_feed_override.get_active() and jogmode
        so = self.widgets.button_spindle_override.get_active() and jogmode
        mv = self.widgets.button_rapid_override.get_active() and jogmode
        self.halcomp["f-override-enable-out"] = fo
        self.halcomp["s-override-enable-out"] = so
        self.halcomp["mv-override-enable-out"] = mv

    def __getitem__(self, item):
        return getattr(self, item)
    def __setitem__(self, item, value):
        return setattr(self, item, value)

# calls a postgui file if there is one.
# then starts Gscreen
if __name__ == "__main__":
    #app = Gscreen()
    try:
        app = Gscreen()
    except KeyboardInterrupt:
        sys.exit(0)
    except Exception as e:
        print(">>>>>>>>>>>>>>>>>>")
        print(e)
    postgui_halfile,inifile = Gscreen.postgui(app)
    print("**** GSCREEN INFO: postgui filename:",postgui_halfile)
    if postgui_halfile is not None:
        for f in postgui_halfile:
            if f.lower().endswith('.tcl'):
                res = os.spawnvp(os.P_WAIT, "haltcl", ["haltcl", "-i", inifile, f])
            else:
                res = os.spawnvp(os.P_WAIT, "halcmd", ["halcmd", "-i", inifile, "-f", f])
            if res: raise SystemExit(res)
    Gtk.main()

