Qt 4.8: xform.h Example File (demos/affine/xform.h)

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# xform.h Example File

demos/affine/xform.h

     /****************************************************************************
     **
     ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** Commercial License Usage
     ** Licensees holding valid commercial Qt licenses may use this file in
     ** accordance with the commercial license agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and Digia.  For licensing terms and
     ** conditions see http://qt.digia.com/licensing.  For further information
     ** use the contact form at http://qt.digia.com/contact-us.
     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
     ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
     **
     ** In addition, as a special exception, Digia gives you certain additional
     ** rights.  These rights are described in the Digia Qt LGPL Exception
     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU General Public License version 3.0 requirements will be
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     #ifndef XFORM_H
     #define XFORM_H

     #include "arthurwidgets.h"

     #include <QBasicTimer>
     #include <QPolygonF>

     class HoverPoints;
     QT_FORWARD_DECLARE_CLASS(QLineEdit)

     class XFormView : public ArthurFrame
     {
     public:
         Q_OBJECT

         Q_PROPERTY(XFormType type READ type WRITE setType)
         Q_PROPERTY(bool animation READ animation WRITE setAnimation)
         Q_PROPERTY(qreal shear READ shear WRITE setShear)
         Q_PROPERTY(qreal rotation READ rotation WRITE setRotation)
         Q_PROPERTY(qreal scale READ scale WRITE setScale)
         Q_PROPERTY(QString text READ text WRITE setText)
         Q_PROPERTY(QPixmap pixmap READ pixmap WRITE setPixmap)
         Q_ENUMS(XFormType)

     public:
         enum XFormType { VectorType, PixmapType, TextType };

         XFormView(QWidget *parent);
         void paint(QPainter *);
         void drawVectorType(QPainter *painter);
         void drawPixmapType(QPainter *painter);
         void drawTextType(QPainter *painter);
         QSize sizeHint() const { return QSize(500, 500); }

         void mousePressEvent(QMouseEvent *e);
         void resizeEvent(QResizeEvent *e);
         HoverPoints *hoverPoints() { return pts; }

         bool animation() const { return timer.isActive(); }
         qreal shear() const { return m_shear; }
         qreal scale() const { return m_scale; }
         qreal rotation() const { return m_rotation; }
         void setShear(qreal s);
         void setScale(qreal s);
         void setRotation(qreal r);

         XFormType type() const;
         QPixmap pixmap() const;
         QString text() const;

     public slots:
         void setAnimation(bool animate);
         void updateCtrlPoints(const QPolygonF &);
         void changeRotation(int rotation);
         void changeScale(int scale);
         void changeShear(int shear);

         void setText(const QString &);
         void setPixmap(const QPixmap &);
         void setType(XFormType t);

         void setVectorType();
         void setPixmapType();
         void setTextType();
         void reset();

     signals:
         void rotationChanged(int rotation);
         void scaleChanged(int scale);
         void shearChanged(int shear);

     protected:
         void timerEvent(QTimerEvent *e);
         void wheelEvent(QWheelEvent *);

     private:
         QPolygonF ctrlPoints;
         HoverPoints *pts;
         qreal m_rotation;
         qreal m_scale;
         qreal m_shear;
         XFormType m_type;
         QPixmap m_pixmap;
         QString m_text;
         QBasicTimer timer;
     };

     class XFormWidget : public QWidget
     {
         Q_OBJECT
     public:
         XFormWidget(QWidget *parent);

     private:
         XFormView *view;
         QLineEdit *textEditor;
     };

     #endif // XFORM_H