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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #ifndef IMAGEWIDGET_H
++ #define IMAGEWIDGET_H
++
++ #include <QFileInfo>
++ #include <QImage>
++ #include <QLoggingCategory>
++ #include <QWidget>
++
++ QT_BEGIN_NAMESPACE
++ class QGestureEvent;
++ class QPanGesture;
++ class QPinchGesture;
++ class QSwipeGesture;
++ QT_END_NAMESPACE
++
++ Q_DECLARE_LOGGING_CATEGORY(lcExample)
++
++ //! [class definition begin]
++ class ImageWidget : public QWidget
++ {
++ Q_OBJECT
++
++ public:
++ ImageWidget(QWidget *parent = nullptr);
++ void openDirectory(const QString &url);
++ 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*);
++ //! [class definition begin]
++
++ QImage loadImage(const QFileInfo &fileInfo) const;
++ void loadImage();
++ void goNextImage();
++ void goPrevImage();
++ void goToImage(int index);
++
++ QString path;
++ QFileInfoList files;
++ int position;
++
++ QImage prevImage, nextImage;
++ QImage currentImage;
++
++ qreal horizontalOffset;
++ qreal verticalOffset;
++ qreal rotationAngle;
++ qreal scaleFactor;
++ qreal currentStepScaleFactor;
++ //! [class definition end]
++ };
++ //! [class definition end]
++
++ #endif