QRasterWindow Class
QRasterWindow is a convenience class for using QPainter on a QWindow. More...
Header: | #include <QRasterWindow> |
Inherits: | QPaintDeviceWindow |
Public Functions
QRasterWindow(QWindow *parent = nullptr) |
Reimplemented Protected Functions
virtual int | metric(PaintDeviceMetric metric) const override |
virtual QPaintDevice * | redirected(QPoint *) const override |
Detailed Description
\inmodule
QtGui \since
5.4
QRasterWindow is a QWindow with a raster-based, non-OpenGL surface. On top of the functionality offered by QWindow, QRasterWindow adds a virtual paintEvent() function and the possibility to open a QPainter on itself. The underlying paint engine will be the raster one, meaning that all drawing will happen on the CPU. For performing accelerated, OpenGL-based drawing, use QOpenGLWindow instead.
Internally the class is thin wrapper for QWindow and QBackingStore and is very similar to the Raster Window Example that uses these classes directly.
See also QPaintDeviceWindow::paintEvent() and QPaintDeviceWindow::update().
Member Function Documentation
[explicit]
QRasterWindow::QRasterWindow(QWindow *parent = nullptr)
Constructs a new QRasterWindow with parent.
[override virtual protected]
int QRasterWindow::metric(PaintDeviceMetric metric) const
Reimplements: QPaintDeviceWindow::metric(PaintDeviceMetric metric) const.
\internal
[override virtual protected]
QPaintDevice *QRasterWindow::redirected(QPoint *) const
Reimplements: QPaintDevice::redirected(QPoint *offset) const.
\internal