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| author | David Boddie <dboddie@trolltech.com> | 2009-08-28 13:01:10 (GMT) |
|---|---|---|
| committer | David Boddie <dboddie@trolltech.com> | 2009-08-28 13:01:10 (GMT) |
| commit | 9725ab222ffceb34b93af01631b273404ab784a9 (patch) | |
| tree | 91765bf18be03e52b860c0b56f1c8fd242ea4d81 | |
| parent | 81fc91183fd12cff512ac20ed265b6c0b44b2f30 (diff) | |
| download | Qt-9725ab222ffceb34b93af01631b273404ab784a9.zip Qt-9725ab222ffceb34b93af01631b273404ab784a9.tar.gz Qt-9725ab222ffceb34b93af01631b273404ab784a9.tar.bz2 | |
Doc: Added some information about the clipping applied in paint events.
Task-number: 203483
Reviewed-by: Trust Me
| -rw-r--r-- | src/gui/kernel/qevent.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/gui/kernel/qevent.cpp b/src/gui/kernel/qevent.cpp index 9626193..8d98223 100644 --- a/src/gui/kernel/qevent.cpp +++ b/src/gui/kernel/qevent.cpp @@ -1080,8 +1080,17 @@ Qt::FocusReason QFocusEvent::reason() const rect() that is the bounding rectangle of that region. Both are provided because many widgets can't make much use of region(), and rect() can be much faster than region().boundingRect(). + + \section1 Automatic Clipping + Painting is clipped to region() during the processing of a paint - event. + event. This clipping is performed by Qt's paint system and is + independent of any clipping that may be applied to a QPainter used to + draw on the paint device. + + As a result, the value returned by QPainter::clipRegion() on + a newly-constructed QPainter will not reflect the clip region that is + used by the paint system. \sa QPainter, QWidget::update(), QWidget::repaint(), QWidget::paintEvent() |