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/*
* SPDX-FileCopyrightText: 2006 Peter Penz <[email protected]>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef PIXMAPVIEWER_H
#define PIXMAPVIEWER_H
#include <QPixmap>
#include <QQueue>
#include <QTimeLine>
#include <QWidget>
class QPaintEvent;
class QMovie;
/**
* @brief Widget which shows a pixmap centered inside the boundaries.
*
* When the pixmap is changed, a smooth transition is done from the old pixmap
* to the new pixmap.
*/
class PixmapViewer : public QWidget
{
Q_OBJECT
public:
enum Transition {
/** No transition is done when the pixmap is changed. */
NoTransition,
/**
* The old pixmap is replaced by the new pixmap and the size is
* adjusted smoothly to the size of the new pixmap.
*/
DefaultTransition,
/**
* If the old pixmap and the new pixmap have the same content, but
* a different size it is recommended to use Transition::SizeTransition
* instead of Transition::DefaultTransition. In this case it is assured
* that the larger pixmap is used for downscaling, which leads
* to an improved scaling output.
*/
SizeTransition
};
explicit PixmapViewer(QWidget *parent, Transition transition = DefaultTransition);
~PixmapViewer() override;
void setPixmap(const QPixmap &pixmap);
QPixmap pixmap() const;
/**
* Sets the size hint to \a size and triggers a relayout
* of the parent widget. Per default no size hint is given.
*/
void setSizeHint(const QSize &size);
QSize sizeHint() const override;
void setAnimatedImageFileName(const QString &fileName);
QString animatedImageFileName() const;
void stopAnimatedImage();
/**
* Checks if \a mimeType has a format supported by QMovie.
*/
static bool isAnimatedMimeType(const QString &mimeType);
protected:
void paintEvent(QPaintEvent *event) override;
private Q_SLOTS:
void checkPendingPixmaps();
void updateAnimatedImageFrame();
private:
QPixmap m_pixmap;
QPixmap m_oldPixmap;
QMovie *m_animatedImage;
QQueue<QPixmap> m_pendingPixmaps;
QTimeLine m_animation;
Transition m_transition;
int m_animationStep;
QSize m_sizeHint;
bool m_hasAnimatedImage;
};
inline QPixmap PixmapViewer::pixmap() const
{
return m_pixmap;
}
#endif
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