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docs: clarify usage of css 'qproperty' in stylesheets

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Clarify that the qproperty properties will only be
evaluated once.

Fixes: QTBUG-2982
Change-Id: Ie294ced118f740c7378c62c0b5a4924d5628e118
Reviewed-by: Venugopal Shivashankar <Venugopal.Shivashankar@qt.io>
This commit is contained in:
Richard Moe Gustavsen 2019-10-11 09:52:24 +02:00
parent 5205510524
commit d71dbe3e93
1 changed files with 4 additions and 0 deletions
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4
src/widgets/doc/src/widgets-and-layouts/stylesheet.qdoc
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@ -549,6 +549,10 @@
If the property references an enum declared with Q_ENUMS, you should If the property references an enum declared with Q_ENUMS, you should
reference its constants by name, i.e., not their numeric value. reference its constants by name, i.e., not their numeric value.
\note Use the qproperty syntax with care, as it modifies the
widget that is being painted. Also, the qproperty syntax is evaluated only
once, which is when the widget is polished by the style. This means that any
attempt to use them in pseudo-states such as QPushButton:hover, will not work.
*/ */
/*! /*!