dimageviewer.h

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// SPDX-FileCopyrightText: 2022 UnionTech Software Technology Co., Ltd.
//
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#ifndef DIMAGEVIEWER_H
#define DIMAGEVIEWER_H
 
#include <dtkwidget_global.h>
#include <DGraphicsView>
#include <DObject>
 
DWIDGET_BEGIN_NAMESPACE
 
class DImageViewerPrivate;
class LIBDTKWIDGETSHARED_EXPORT DImageViewer : public DGraphicsView, public DCORE_NAMESPACE::DObject
{
    Q_OBJECT
 
    Q_PROPERTY(QImage image READ image WRITE setImage NOTIFY imageChanged)
    Q_PROPERTY(QString fileName READ fileName WRITE setFileName NOTIFY fileNameChanged)
    Q_PROPERTY(qreal scaleFactor READ scaleFactor WRITE setScaleFactor NOTIFY scaleFactorChanged)
    Q_PROPERTY(int rotateAngle READ rotateAngle NOTIFY rotateAngleChanged) 
 
public:
    explicit DImageViewer(QWidget *parent = nullptr);
    explicit DImageViewer(const QImage &image, QWidget *parent = nullptr);
    explicit DImageViewer(const QString &fileName, QWidget *parent = nullptr);
    ~DImageViewer() Q_DECL_OVERRIDE;
 
    QImage image() const;
    void setImage(const QImage &image);
    QString fileName() const;
    void setFileName(const QString &fileName);
 
    qreal scaleFactor() const;
    void setScaleFactor(qreal factor);
    void scaleImage(qreal factor);
 
    void autoFitImage();
    void fitToWidget();
    void fitNormalSize();
    void rotateClockwise();
    void rotateCounterclockwise();
    int rotateAngle() const;
    void resetRotateAngle();
    void clear();
 
    void centerOn(qreal x, qreal y);
    QRect visibleImageRect() const;
 
    Q_SLOT void scaleAtPoint(QPoint pos, qreal factor);
 
    void beginCropImage();
    void endCropImage();
    void resetCropImage();
    void setCropAspectRatio(qreal w, qreal h);
    QRect cropImageRect() const;
 
Q_SIGNALS:
    void imageChanged(const QImage &image);
    void fileNameChanged(const QString &fileName);
    void scaleFactorChanged(qreal scaleFactor);
    void rotateAngleChanged(int angle);
    void transformChanged();
    void requestPreviousImage();
    void requestNextImage();
    void cropImageChanged(const QRect &rect);
 
protected:
    void mouseMoveEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
    void wheelEvent(QWheelEvent *event) Q_DECL_OVERRIDE;
    bool event(QEvent *event) Q_DECL_OVERRIDE;
 
private:
    Q_DISABLE_COPY(DImageViewer)
    D_DECLARE_PRIVATE(DImageViewer)
 
    D_PRIVATE_SLOT(void _q_pinchAnimeFinished())
};
 
DWIDGET_END_NAMESPACE
 
#endif // DIMAGEVIEWER_H