From a3c9550d7cef969298c43276cbfe92abb8578ce5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Vr=C3=A1til?= <daniel.vratil@kdab.com>
Date: Thu, 3 Nov 2016 10:30:12 +0100
Subject: QWindow::setFlags: return early if the flags didn't change
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Prevents calling into QPlatformWindow::setWindowFlags() when
there's no change.

Change-Id: I2dccf3052b5895ee7f05623e6ed468be14bb0c0d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Sérgio Martins <sergio.martins@kdab.com>
---
 src/gui/kernel/qwindow.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src')

diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index 91b5acbd35..ca29906fad 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -825,6 +825,9 @@ QSurfaceFormat QWindow::format() const
 void QWindow::setFlags(Qt::WindowFlags flags)
 {
     Q_D(QWindow);
+    if (d->windowFlags == flags)
+        return;
+
     if (d->platformWindow)
         d->platformWindow->setWindowFlags(flags);
     d->windowFlags = flags;
-- 
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