From 9e2c4bc67f30eb1e8d776afe3a092d5994aaab38 Mon Sep 17 00:00:00 2001
From: Friedemann Kleint <Friedemann.Kleint@digia.com>
Date: Mon, 5 May 2014 14:11:30 +0200
Subject: QMdiArea: Ignore events of other instances in the event filter.

This caused for example the variable QMdiAreaPrivate::isSubWindowsTiled
being cleared from another instance, which resulted in odd
resizing behavior.

Task-number: QTBUG-31448
Change-Id: I880f7e415d6654e52499df1bfaf99f2c55d86320
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Reviewed-by: Andy Shaw <andy.shaw@digia.com>
---
 src/widgets/widgets/qmdiarea.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/widgets/widgets/qmdiarea.cpp b/src/widgets/widgets/qmdiarea.cpp
index 600d9b536f..17f73b2809 100644
--- a/src/widgets/widgets/qmdiarea.cpp
+++ b/src/widgets/widgets/qmdiarea.cpp
@@ -2591,6 +2591,9 @@ bool QMdiArea::eventFilter(QObject *object, QEvent *event)
         return QAbstractScrollArea::eventFilter(object, event);
     }
 
+    if (subWindow->mdiArea() != this)
+        return QAbstractScrollArea::eventFilter(object, event);
+
     // QMdiSubWindow events:
     switch (event->type()) {
     case QEvent::Move:
-- 
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