From 276776f50369580f33ec01b22aa928e48358a0f7 Mon Sep 17 00:00:00 2001
From: Morten Johan Sorvig <morten.sorvig@nokia.com>
Date: Fri, 4 May 2012 12:28:26 +0200
Subject: Don't flush WA_DontShowOnScreen widgets.
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QBackingStore::flush expects that windows have gotten expose
events before flush is called. Not on screen -> no expose events ->
don't call flush.

Change-Id: Id868888566fe672939f3c5775f9f371fb3240ee8
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
---
 src/widgets/kernel/qwidgetbackingstore.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/widgets')

diff --git a/src/widgets/kernel/qwidgetbackingstore.cpp b/src/widgets/kernel/qwidgetbackingstore.cpp
index 2c9ad14bcf..a697578bc7 100644
--- a/src/widgets/kernel/qwidgetbackingstore.cpp
+++ b/src/widgets/kernel/qwidgetbackingstore.cpp
@@ -104,6 +104,10 @@ static inline void qt_flush(QWidget *widget, const QRegion &region, QBackingStor
             frames = 0;
         }
     }
+
+    if (tlw->testAttribute(Qt::WA_DontShowOnScreen) || widget->testAttribute(Qt::WA_DontShowOnScreen))
+        return;
+
     if (widget != tlw)
         backingStore->flush(region, widget->windowHandle(), tlwOffset + widget->mapTo(tlw, QPoint()));
     else
-- 
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