QRasterWindow 類

QRasterWindow is a convenience class for using QPainter 在 QWindow . 更多...

頭：	#include <QRasterWindow>
qmake:	QT += gui
Since:	Qt 5.4
繼承：	QPaintDeviceWindow

公共函數

	QRasterWindow (QWindow * parent = nullptr)
virtual	~QRasterWindow ()

2 公共函數繼承自 QPaintDeviceWindow
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

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

額外繼承成員

16 特性繼承自 QWindow
1 特性繼承自 QObject
1 公共槽繼承自 QPaintDeviceWindow
24 公共槽繼承自 QWindow
1 公共槽繼承自 QObject
18 信號繼承自 QWindow
2 信號繼承自 QObject
1 保護函數繼承自 QPaintDeviceWindow
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

詳細描述

QRasterWindow is a convenience class for using QPainter 在 QWindow .

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 光柵窗口範例 that uses these classes directly.

另請參閱 QPaintDeviceWindow::paintEvent () 和 QPaintDeviceWindow::update ().

成員函數文檔編製

QRasterWindow:: QRasterWindow ( QWindow * parent = nullptr)

構造新的 QRasterWindow with parent .

`[虛擬]` QRasterWindow:: ~QRasterWindow ()

Destroys the instance of QRasterWindow. The destructor is virtual.

內容