Qt 4.8: slidersgroup.cpp Example File (widgets/sliders/slidersgroup.cpp)

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# slidersgroup.cpp Example File

widgets/sliders/slidersgroup.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
     **     of its contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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     #include <QtGui>

     #include "slidersgroup.h"

     SlidersGroup::SlidersGroup(Qt::Orientation orientation, const QString &title,
                                QWidget *parent)
         : QGroupBox(title, parent)
     {
         slider = new QSlider(orientation);
         slider->setFocusPolicy(Qt::StrongFocus);
         slider->setTickPosition(QSlider::TicksBothSides);
         slider->setTickInterval(10);
         slider->setSingleStep(1);

         scrollBar = new QScrollBar(orientation);
         scrollBar->setFocusPolicy(Qt::StrongFocus);

         dial = new QDial;
         dial->setFocusPolicy(Qt::StrongFocus);

         connect(slider, SIGNAL(valueChanged(int)), scrollBar, SLOT(setValue(int)));
         connect(scrollBar, SIGNAL(valueChanged(int)), dial, SLOT(setValue(int)));
         connect(dial, SIGNAL(valueChanged(int)), slider, SLOT(setValue(int)));
         connect(dial, SIGNAL(valueChanged(int)), this, SIGNAL(valueChanged(int)));

         QBoxLayout::Direction direction;

         if (orientation == Qt::Horizontal)
             direction = QBoxLayout::TopToBottom;
         else
             direction = QBoxLayout::LeftToRight;

         QBoxLayout *slidersLayout = new QBoxLayout(direction);
         slidersLayout->addWidget(slider);
         slidersLayout->addWidget(scrollBar);
         slidersLayout->addWidget(dial);
         setLayout(slidersLayout);
     }

     void SlidersGroup::setValue(int value)
     {
         slider->setValue(value);
     }

     void SlidersGroup::setMinimum(int value)
     {
         slider->setMinimum(value);
         scrollBar->setMinimum(value);
         dial->setMinimum(value);
     }

     void SlidersGroup::setMaximum(int value)
     {
         slider->setMaximum(value);
         scrollBar->setMaximum(value);
         dial->setMaximum(value);
     }

     void SlidersGroup::invertAppearance(bool invert)
     {
         slider->setInvertedAppearance(invert);
         scrollBar->setInvertedAppearance(invert);
         dial->setInvertedAppearance(invert);
     }

     void SlidersGroup::invertKeyBindings(bool invert)
     {
         slider->setInvertedControls(invert);
         scrollBar->setInvertedControls(invert);
         dial->setInvertedControls(invert);
     }