diff options
Diffstat (limited to 'src/gui/kernel/qwindow.cpp')
| -rw-r--r-- | src/gui/kernel/qwindow.cpp | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp index 1fbb67fb8a..4a88988322 100644 --- a/src/gui/kernel/qwindow.cpp +++ b/src/gui/kernel/qwindow.cpp @@ -2078,11 +2078,16 @@ void QWindowPrivate::deliverUpdateRequest() Calling this function multiple times will result in a single event being delivered to the window. - Subclasses of QWindow should reimplement QWindow::event(), intercept - the event and call the application's rendering code, then call the - base class implementation. -*/ + Subclasses of QWindow should reimplement event(), intercept the event and + call the application's rendering code, then call the base class + implementation. + \note The subclass' reimplementation of event() must invoke the base class + implementation, unless it is absolutely sure that the event does not need to + be handled by the base class. For example, the default implementation of + this function relies on QEvent::Timer events. Filtering them away would + therefore break the delivery of the update events. +*/ void QWindow::requestUpdate() { Q_D(QWindow); |