QPaintEvent

Synopsis

Functions

• def rect ()
• def region ()

Detailed Description

The PySide.QtGui.QPaintEvent class contains event parameters for paint events.

Paint events are sent to widgets that need to update themselves, for instance when part of a widget is exposed because a covering widget was moved.

The event contains a PySide.QtGui.QPaintEvent.region() that needs to be updated, and a PySide.QtGui.QPaintEvent.rect() that is the bounding rectangle of that region. Both are provided because many widgets can’t make much use of PySide.QtGui.QPaintEvent.region() , and PySide.QtGui.QPaintEvent.rect() can be much faster than PySide.QtGui.QPaintEvent.region() . boundingRect() .

Automatic Clipping

Painting is clipped to PySide.QtGui.QPaintEvent.region() during the processing of a paint event. This clipping is performed by Qt’s paint system and is independent of any clipping that may be applied to a PySide.QtGui.QPainter used to draw on the paint device.

As a result, the value returned by QPainter.clipRegion() on a newly-constructed PySide.QtGui.QPainter will not reflect the clip region that is used by the paint system.

See also

PySide.QtGui.QPainter QWidget.update() QWidget.repaint() QWidget.paintEvent()

class PySide.QtGui.QPaintEvent(paintRect)

class PySide.QtGui.QPaintEvent(paintRegion)

Parameters:

• paintRegion – PySide.QtGui.QRegion
• paintRect – PySide.QtCore.QRect

Constructs a paint event object with the rectangle that needs to be updated. The region is specified by paintRect .

Constructs a paint event object with the region that needs to be updated. The region is specified by paintRegion .

PySide.QtGui.QPaintEvent.rect()

Return type:PySide.QtCore.QRect

Returns the rectangle that needs to be updated.

See also

PySide.QtGui.QPaintEvent.region() QPainter.setClipRect()

PySide.QtGui.QPaintEvent.region()

Return type:PySide.QtGui.QRegion

Returns the region that needs to be updated.

See also

PySide.QtGui.QPaintEvent.rect() QPainter.setClipRegion()