QRasterWindow 是方便类为使用 QPainter 在 QWindow . 更多...
| 头： | #include <QRasterWindow> |
| qmake: | QT += gui |
| Since: | Qt 5.4 |
| 继承： | QPaintDeviceWindow |
该类在 Qt 5.4 引入。
| QRasterWindow (QWindow * parent = nullptr) |
QRasterWindow 是 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 代替。
Internally the class is thin wrapper for QWindow and QBackingStore and is very similar to the 光栅窗口范例 that uses these classes directly.
另请参阅 QPaintDeviceWindow::paintEvent () 和 QPaintDeviceWindow::update ().
构造新的 QRasterWindow 采用 parent .
