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pathdeform.h Example File
demos/deform/pathdeform.h

 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the demonstration applications of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 ** 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, Nokia gives you certain additional
 ** rights.  These rights are described in the Nokia Qt LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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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
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 ** packaging of this file.  Please review the following information to
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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

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