src/practice/imagewidget.h

0001 /*
0002     SPDX-FileCopyrightText: 2009 Daniel Laidig <d.laidig@gmx.de>
0003     SPDX-License-Identifier: GPL-2.0-or-later
0004 */
0005
0006 #ifndef PRACTICE_IMAGEWIDGET_H
0007 #define PRACTICE_IMAGEWIDGET_H
0008
0009 #include <QWidget>
0010
0011 class QTimeLine;
0012
0013 namespace Practice
0014 {
0015 class ImageWidget : public QWidget
0016 {
0017     Q_OBJECT
0018
0019 public:
0020     explicit ImageWidget(QWidget *parent = nullptr);
0021
0022     void setPixmap(const QPixmap &pixmap);
0023     void setScalingEnabled(bool scaling, bool onlyDownscaling = true);
0024     void setKeepAspectRatio(Qt::AspectRatioMode mode);
0025     void setFadingEnabled(bool fading);
0026     void setAlignment(Qt::Alignment alignment);
0027
0028 protected:
0029     void paintEvent(QPaintEvent *e) override;
0030     void resizeEvent(QResizeEvent *e) override;
0031
0032 Q_SIGNALS:
0033     void sizeChanged();
0034
0035 private Q_SLOTS:
0036     void scalePixmap(bool smooth = true);
0037     void animationFinished();
0038
0039 private:
0040     bool m_fading{true};
0041     bool m_scaling{true};
0042     bool m_onlyDownscaling{true};
0043     Qt::AspectRatioMode m_keepAspectRatio{Qt::KeepAspectRatio};
0044     Qt::Alignment m_alignment{Qt::AlignCenter};
0045     QPixmap m_originalPixmap;
0046     QPixmap m_scaledPixmap;
0047     QPixmap m_scaledBackupPixmap;
0048     QPixmap m_animationPixmap;
0049     bool m_scaledPixmapOutOfDate;
0050     /// Timer used to delay the smooth scaling
0051     QTimer *m_scaleTimer{nullptr};
0052     QTimeLine *m_animation{nullptr};
0053 };
0054
0055 }
0056
0057 #endif // PRACTICE_IMAGEWIDGET_H