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50
51#include <QWindow>
52
53#include <QtGui/qopengl.h>
54#include <QtGui/qopenglshaderprogram.h>
55#include <QtGui/qopenglframebufferobject.h>
56
57#include <QPropertyAnimation>
58
59#include <QColor>
60#include <QImage>
61#include <QTime>
62
63QT_BEGIN_NAMESPACE
64class QOpenGLContext;
65QT_END_NAMESPACE
66
67class PaintedWindow : public QWindow
68{
69 Q_OBJECT
70 Q_PROPERTY(qreal rotation READ rotation WRITE setRotation NOTIFY rotationChanged)
71
72public:
73 PaintedWindow();
74
75 qreal rotation() const { return m_rotation; }
76
77signals:
78 void rotationChanged(qreal rotation);
79
80private slots:
81 void paint();
82 void setRotation(qreal r);
83 void orientationChanged(Qt::ScreenOrientation newOrientation);
84 void rotationDone();
85
86private:
87 void exposeEvent(QExposeEvent *) override;
88 void mousePressEvent(QMouseEvent *) override;
89
90 void paint(QPainter *painter, const QRect &rect);
91
92 QOpenGLContext *m_context;
93 qreal m_rotation;
94
95 QImage m_prevImage;
96 QImage m_nextImage;
97 qreal m_deltaRotation;
98
99 Qt::ScreenOrientation m_targetOrientation;
100 Qt::ScreenOrientation m_nextTargetOrientation;
101
102 QPropertyAnimation *m_animation;
103 QTimer *m_paintTimer;
104};
105

source code of qtbase/examples/opengl/paintedwindow/paintedwindow.h