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QPaintEvent Class Reference


The QPaintEvent class contains event parameters for paint events. More...

#include <qevent.h>

Inherits QEvent.

List of all member functions.

Public Members


Detailed Description

The QPaintEvent class contains event parameters for paint events.

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

The event handler QWidget::paintEvent() receives paint events.

See also: QPainter, QWidget::update() and QWidget::repaint().

Examples: qtimage/qtimage.cpp grapher/grapher.cpp drawlines/connect.cpp xform/xform.cpp drawdemo/drawdemo.cpp progress/progress.cpp qmag/qmag.cpp splitter/splitter.cpp forever/forever.cpp desktop/desktop.cpp trivial/trivial.cpp picture/picture.cpp


Member Function Documentation

QPaintEvent::QPaintEvent(constQRect&paintRect, boolerased=TRUE=TRUE)

Constructs a paint event object with the rectangle that should be updated.

QPaintEvent::QPaintEvent(constQRegion&paintRegion, boolerased=TRUE=TRUE)

Constructs a paint event object with the region that should be updated.

boolQPaintEvent::erased()const

Returns whether the paint event region (or rectangle) has been erased with the widget's background.

constQRect&QPaintEvent::rect()const

Returns the rectangle that should be updated.

See also: region() and QPainter::setClipRect().

Examples: qtimage/qtimage.cpp grapher/grapher.cpp progress/progress.cpp splitter/splitter.cpp trivial/trivial.cpp

constQRegion&QPaintEvent::region()const

Returns the region that should be updated.

See also: rect() and QPainter::setClipRegion().


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Qt version 2.0.2