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explain specifically how to make a transparent window

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Change-Id: I136d8d9709d4fae914f12919e513641a6e76e3f0
Task-number: QTBUG-20768
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
This commit is contained in:
Shawn Rutledge 2012-08-21 19:20:11 +02:00 committed by Qt by Nokia
parent 77e57387ac
commit dfe7bdbe9c
1 changed files with 10 additions and 2 deletions
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12
src/gui/kernel/qwindow.cpp
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@ -435,8 +435,16 @@ void QWindow::setWindowModality(Qt::WindowModality modality)
/*!
Sets the window's surface \a format.
The format determines properties such as color depth, alpha,
depth and stencil buffer size, etc.
The format determines properties such as color depth, alpha, depth and
stencil buffer size, etc. For example, to give a window a transparent
background (provided that the window system supports compositing, and
provided that other content in the window does not make it opaque again):
\code
QSurfaceFormat format;
format.setAlphaBufferSize(8);
window.setFormat(format);
\endcode
The surface format will be resolved in the create() function. Calling
this function after create() has been called will not re-resolve the