內容

• 公共函數
• 公共槽
• 靜態公共成員
• 保護函數
• 詳細描述

QPaintDeviceWindow 類

方便子類化的 QWindow 也是 QPaintDevice . 更多...

頭：	#include <QPaintDeviceWindow>
qmake:	QT += gui
Since:	Qt 5.4
繼承：	QWindow and QPaintDevice
繼承者：	QOpenGLWindow and QRasterWindow

• 所有成員列錶，包括繼承成員
• 過時成員

公共函數

void	update (const QRect & rect )
void	update (const QRegion & region )

• 82 公共函數繼承自 QWindow
• 14 公共函數繼承自 QPaintDevice
• 31 公共函數繼承自 QObject
• 6 公共函數繼承自 QSurface

公共槽

void

update ()

• 24 公共槽繼承自 QWindow
• 1 公共槽繼承自 QObject

靜態公共成員

const QMetaObject

staticMetaObject

• 1 靜態公共成員繼承自 QWindow
• 9 靜態公共成員繼承自 QObject

保護函數

virtual void

paintEvent (QPaintEvent * event )

• 18 保護函數繼承自 QWindow
• 1 保護函數繼承自 QPaintDevice
• 9 保護函數繼承自 QObject

額外繼承成員

• 16 特性繼承自 QWindow
• 1 特性繼承自 QObject
• 18 信號繼承自 QWindow
• 2 信號繼承自 QObject

詳細描述

方便子類化的 QWindow 也是 QPaintDevice .

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： 此類不能直接被用於應用程序。它寜願充當子類的基，像 QOpenGLWindow .

另請參閱 QOpenGLWindow .

成員函數文檔編製

[virtual protected] void QPaintDeviceWindow:: paintEvent ( QPaintEvent * event )

處理描繪事件傳入的 event 參數。

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

void QPaintDeviceWindow:: update (const QRect & rect )

Marks the rect of the window as dirty and schedules a repaint.

注意： Subsequent calls to this function before the next paint event will get ignored, but rect is added to the region to update.

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

void QPaintDeviceWindow:: update (const QRegion & region )

Marks the region of the window as dirty and schedules a repaint.

注意： Subsequent calls to this function before the next paint event will get ignored, but region is added to the region to update.

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

[slot] void 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.