QPaintDeviceWindow ¶

概要 ¶

详细描述 ¶

QPaintDeviceWindow is like a regular QWindow , with the added functionality of being a paint device too. Whenever the content needs to be updated, the virtual paintEvent() function is called. Subclasses, that reimplement this function, can then simply open a QPainter on the window.

注意

此类不能直接被用于应用程序。它宁愿充当子类的基，像 QOpenGLWindow .

另请参阅

QOpenGLWindow

PySide2.QtGui.QPaintDeviceWindow. paintEvent ( event ) ¶

参数

event – QPaintEvent

Handles paint events passed in the event 参数。

The default implementation does nothing. Reimplement this function to perform painting. If necessary, the dirty area is retrievable from the event .

PySide2.QtGui.QPaintDeviceWindow. update ( ) ¶

Marks the entire window as dirty and schedules a repaint.

注意

Subsequent calls to this function before the next paint event will get ignored.

注意

For non-exposed windows the update is deferred until the window becomes exposed again.

PySide2.QtGui.QPaintDeviceWindow. update ( rect ) ¶

参数

rect – QRect

PySide2.QtGui.QPaintDeviceWindow. update ( region ) ¶

参数

region – QRegion