/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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
** met:
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**     notice, this list of conditions and the following disclaimer.
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**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
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****************************************************************************/

#ifndef IMAGEWIDGET_H
#define IMAGEWIDGET_H

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

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 = 0);
    void openDirectory(const QString &path);
    void grabGestures(const QList<Qt::GestureType> &gestures);

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

private:
    bool gestureEvent(QGestureEvent *event);
    void panTriggered(QPanGesture*);
    void pinchTriggered(QPinchGesture*);
    void swipeTriggered(QSwipeGesture*);
//! [class definition begin]

    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;
//! [class definition end]
};
//! [class definition end]

#endif
