File indexing completed on 2024-05-19 16:49:21

 /*
  * SPDX-FileCopyrightText: 2006 Peter Penz <peter.penz19@gmail.com>
  *
  * 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