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# imagewidget.h Example File

gestures/imagegestures/imagewidget.h

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** 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:
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     ** modification, are permitted provided that the following conditions are
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     #ifndef IMAGEWIDGET_H
     #define IMAGEWIDGET_H

     #include <QWidget>
     #include <QImage>
     #include <QtGui>

     class QGestureEvent;
     class QPanGesture;
     class QPinchGesture;
     class QSwipeGesture;

     class ImageWidget : public QWidget
     {
         Q_OBJECT

     public:
         ImageWidget(QWidget *parent = 0);
         void openDirectory(const QString &path);
         void grabGestures(const QList<Qt::GestureType> &gestures);
         static void setVerbose(bool v) { ImageWidget::verbose = v; }

     protected:
         bool event(QEvent *event);
         void paintEvent(QPaintEvent *event);
         void resizeEvent(QResizeEvent *event);
         void mouseDoubleClickEvent(QMouseEvent *event);

     private:
         bool gestureEvent(QGestureEvent *event);
         void panTriggered(QPanGesture*);
         void pinchTriggered(QPinchGesture*);
         void swipeTriggered(QSwipeGesture*);

         void updateImage();
         QImage loadImage(const QString &fileName);
         void loadImage();
         void goNextImage();
         void goPrevImage();
         void goToImage(int index);

         QString path;
         QStringList files;
         int position;

         QImage prevImage, nextImage;
         QImage currentImage;

         qreal horizontalOffset;
         qreal verticalOffset;
         qreal rotationAngle;
         qreal scaleFactor;
         qreal currentStepScaleFactor;
         static bool verbose;
     };

     #endif