Compatibility Members for QPaintEvent
The following members of class QPaintEventare part of the Qt compatibility layer. We advise against using them in new code.
Member Function Documentation
Constructs a paint event object with both a paintRegion and a paintRect, both of which represent the area of the widget that needs to be updated.
Returns true if the paint event region (or rectangle) has been erased with the widget's background; otherwise returns false.
Qt 4 always erases regions that require painting. The exception to this rule is if the widget sets the Qt::WA_OpaquePaintEvent or Qt::WA_NoSystemBackground attributes. If either one of those attributes is set and the window system does not make use of subwidget alpha composition (currently X11 and Windows, but this may change), then the region is not erased.
© 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.