Qt 4.8: pathdeform.h Example File (demos/deform/pathdeform.h)

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# pathdeform.h Example File

demos/deform/pathdeform.h

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
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     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
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     ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
     ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
     ** following information to ensure the GNU Lesser General Public License
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     ** 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 PATHDEFORM_H
     #define PATHDEFORM_H

     #include "arthurwidgets.h"

     #include <QPainterPath>
     #include <QBasicTimer>
     #include <QDateTime>

     class PathDeformRenderer : public ArthurFrame
     {
         Q_OBJECT
         Q_PROPERTY(bool animated READ animated WRITE setAnimated)
         Q_PROPERTY(int radius READ radius WRITE setRadius)
         Q_PROPERTY(int fontSize READ fontSize WRITE setFontSize)
         Q_PROPERTY(int intensity READ intensity WRITE setIntensity)
         Q_PROPERTY(QString text READ text WRITE setText)

     public:
         PathDeformRenderer(QWidget *widget, bool smallScreen = false);

         void paint(QPainter *painter);

         void mousePressEvent(QMouseEvent *e);
         void mouseReleaseEvent(QMouseEvent *e);
         void mouseMoveEvent(QMouseEvent *e);
         void timerEvent(QTimerEvent *e);

         QSize sizeHint() const { return QSize(600, 500); }

         bool animated() const { return m_animated; }
         int radius() const { return int(m_radius); }
         int fontSize() const { return m_fontSize; }
         int intensity() const { return int(m_intensity); }
         QString text() const { return m_text; }

     public slots:
         void setRadius(int radius);
         void setFontSize(int fontSize) { m_fontSize = fontSize; setText(m_text); }
         void setText(const QString &text);
         void setIntensity(int intensity);

         void setAnimated(bool animated);

     signals:
         void clicked();
     //     void frameRate(double fps);

     private:
         void generateLensPixmap();
         QPainterPath lensDeform(const QPainterPath &source, const QPointF &offset);

         QBasicTimer m_repaintTimer;
     //     QBasicTimer m_fpsTimer;
     //     int m_fpsCounter;
         QTime m_repaintTracker;

         QVector<QPainterPath> m_paths;
         QVector<QPointF> m_advances;
         QRectF m_pathBounds;
         QString m_text;

         QPixmap m_lens_pixmap;
         QImage m_lens_image;

         int m_fontSize;
         bool m_animated;

         qreal m_intensity;
         qreal m_radius;
         QPointF m_pos;
         QPointF m_offset;
         QPointF m_direction;
         QPointF m_mousePress;
         bool    m_mouseDrag;
         bool    m_smallScreen;
     };

     class PathDeformControls : public QWidget
     {
         Q_OBJECT
     public:
         PathDeformControls(QWidget *parent, PathDeformRenderer* renderer, bool smallScreen);
     signals:
         void okPressed();
         void quitPressed();
     private:
         PathDeformRenderer* m_renderer;
         void layoutForDesktop();
         void layoutForSmallScreen();
     private slots:
         void emitQuitSignal();
         void emitOkSignal();
     };

     class PathDeformWidget : public QWidget
     {
         Q_OBJECT
     public:
         PathDeformWidget(QWidget *parent, bool smallScreen);
         void setStyle ( QStyle * style );

     private:
         PathDeformRenderer *m_renderer;
         PathDeformControls *m_controls;

     private slots:
         void showControls();
         void hideControls();
     };

     #endif // PATHDEFORM_H