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39
40#ifndef QPAINTDEVICEWINDOW_H
41#define QPAINTDEVICEWINDOW_H
42
43#include <QtGui/qtguiglobal.h>
44#include <QtGui/QWindow>
45#include <QtGui/QPaintDevice>
46
47QT_BEGIN_NAMESPACE
48
49class QPaintDeviceWindowPrivate;
50class QPaintEvent;
51
52class Q_GUI_EXPORT QPaintDeviceWindow : public QWindow, public QPaintDevice
53{
54 Q_OBJECT
55 Q_DECLARE_PRIVATE(QPaintDeviceWindow)
56
57public:
58 void update(const QRect &rect);
59 void update(const QRegion &region);
60
61 using QWindow::width;
62 using QWindow::height;
63 using QWindow::devicePixelRatio;
64
65public Q_SLOTS:
66 void update();
67
68protected:
69 virtual void paintEvent(QPaintEvent *event);
70
71 int metric(PaintDeviceMetric metric) const override;
72 void exposeEvent(QExposeEvent *) override;
73 bool event(QEvent *event) override;
74
75 QPaintDeviceWindow(QPaintDeviceWindowPrivate &dd, QWindow *parent);
76
77private:
78 QPaintEngine *paintEngine() const override;
79 Q_DISABLE_COPY(QPaintDeviceWindow)
80};
81
82QT_END_NAMESPACE
83
84#endif
85

source code of qtbase/src/gui/kernel/qpaintdevicewindow.h