Qt Toolkit - QPaintEvent Class

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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

- QPaintEvent ( const QRegion & paintRegion, bool erased = TRUE )
- QPaintEvent ( const QRect & paintRect, bool erased = TRUE )
- const QRect& rect () const
- const QRegion& region () const
- bool erased () const

## 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 ( const QRect & paintRect, bool erased=TRUE = TRUE )

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

### QPaintEvent::QPaintEvent ( const QRegion & paintRegion, bool erased=TRUE = TRUE )

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

### bool QPaintEvent::erased () const

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

### const QRect & 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

### const QRegion & QPaintEvent::region () const

Returns the region that should be updated.

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

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