From 8fe1d9fb136786986fa2f9e23e4212dba5647836 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Samuel=20R=C3=B8dal?= Date: Thu, 30 Aug 2012 12:43:45 +0200 Subject: Improved the QBackingStore documentation. Added links to the example and added some explanation of when QBackingStore might be useful. Change-Id: Iee19c4fdfc5c27ac9b559c9df428d83d302f3928 Reviewed-by: Paul Olav Tvete --- src/gui/painting/qbackingstore.cpp | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'src/gui/painting') diff --git a/src/gui/painting/qbackingstore.cpp b/src/gui/painting/qbackingstore.cpp index 88be97b717..ff181bac6b 100644 --- a/src/gui/painting/qbackingstore.cpp +++ b/src/gui/painting/qbackingstore.cpp @@ -70,7 +70,20 @@ public: \since 5.0 \inmodule QtGui - \brief The QBackingStore class provides the drawing area for top-level windows. + \brief The QBackingStore class provides a drawing area for QWindow. + + QBackingStore enables the use of QPainter to paint on a QWindow with type + RasterSurface. The other way of rendering to a QWindow is through the use + of OpenGL with QOpenGLContext. + + A QBackingStore contains a buffered representation of the window contents, + and thus supports partial updates by using QPainter to only update a sub + region of the window contents. + + QBackingStore might be used by an application that wants to use QPainter + without OpenGL acceleration and without the extra overhead of using the + QWidget or QGraphicsView UI stacks. For an example of how to use + QBackingStore see the \l{gui/rasterwindow}{Raster Window} example. */ /*! -- cgit v1.2.3