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Cocoa integration - do not invalidate backing store on move

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If window is only moving, there is no reason to reset a backing store,
otherwise with current expose/flush events machinery it's possible
to have glitches while moving a window programmatically.

Change-Id: Ia4408bd23388e529ae93617a92ae84304b707ca1
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>
This commit is contained in:
Timur Pocheptsov 2016-03-04 11:11:17 +01:00
parent fdd2ab58ae
commit 840831b611
1 changed files with 3 additions and 1 deletions
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4
src/plugins/platforms/cocoa/qnsview.mm
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@ -356,6 +356,8 @@ static NSString *_q_NSWindowDidChangeOcclusionStateNotification = nil;
if (m_platformWindow->m_nsWindow && geometry == m_platformWindow->geometry())
return;
const bool isResize = geometry.size() != m_platformWindow->geometry().size();
// It can happen that self.window is nil (if we are changing
// styleMask from/to borderless and content view is being re-parented)
// - this results in an invalid coordinates.
@ -385,7 +387,7 @@ static NSString *_q_NSWindowDidChangeOcclusionStateNotification = nil;
// calles, which Qt and Qt applications do not excpect.
if (!m_platformWindow->m_inSetGeometry)
QWindowSystemInterface::flushWindowSystemEvents();
else
else if (isResize)
m_backingStore = 0;
}
}