imagewidget.h Example File | Qt Widgets 5.12.11

- Qt 5.12
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- Image Gestures Example
- imagewidget.h Example File
- Qt 5.12.11 Reference Documentation

# imagewidget.h Example File

gestures/imagegestures/imagewidget.h

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     #ifndef IMAGEWIDGET_H
     #define IMAGEWIDGET_H

     #include <QWidget>
     #include <QImage>
     #include <QtWidgets>

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

     Q_DECLARE_LOGGING_CATEGORY(lcExample)

     class ImageWidget : public QWidget
     {
         Q_OBJECT

     public:
         ImageWidget(QWidget *parent = 0);
         void openDirectory(const QString &path);
         void grabGestures(const QList<Qt::GestureType> &gestures);

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

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

         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;
     };

     #endif