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39 lines
1.6 KiB
39 lines
1.6 KiB
qt-bugs@ issue : N45716
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applied: no
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author: Enrico Ros <eros.kde@email.it>
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QScrollView unwanted repaint fix.
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This fixes the 'flashing' konqueror window on activation / deactivation by
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saving 1 unwanted repaint (when konqueror window has background).
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I tracked down to the problem to the internal QViewportWidget of the
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QScrollView class.
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When a window is activated the activation event is recursively propagated
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to all childs triggering the windowActivationChange() functions in the
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widget it passes by.
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What happens when the event gets to the Viewport?
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At this point the event has already been handled by windowActivationChange()
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of the parent widget (a QIconView for example) and has then been propagated
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to the Viewport that will handle it with the default
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QWidget::windowActivationChange implementation, maybe raising an unwanted
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update(); so here we stop the event.
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As an addition: if the parent reimplements the windowActivationChange()
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function, mainly to block the update, it won't be happy if the child will
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trigger the update. If the parent do not reimplement the function il will
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inherits the default implementation and there is no need for the viewport's
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one.
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--- work/qt-x11-free-3.3.8/src/widgets/qscrollview.cpp.orig 2004-03-29 10:17:04.000000000 +0000
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+++ work/qt-x11-free-3.3.8/src/widgets/qscrollview.cpp 2004-03-30 16:40:07.599978320 +0000
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@@ -1551,6 +1551,9 @@
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case QEvent::LayoutHint:
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d->autoResizeHint(this);
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break;
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+ case QEvent::WindowActivate:
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+ case QEvent::WindowDeactivate:
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+ return TRUE;
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default:
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break;
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}
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