From 9cfeaf4c0ad47ab3b127550490c3d8971babbb80 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Peter=20K=C3=BCmmel?= <syntheticpp@gmx.net>
Date: Thu, 21 Oct 2010 08:02:09 +0000
Subject: [PATCH] only connect when needed

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@35743 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/frontends/qt4/InGuiThread.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/frontends/qt4/InGuiThread.cpp b/src/frontends/qt4/InGuiThread.cpp
index bd47e50e4b..b9332997f1 100644
--- a/src/frontends/qt4/InGuiThread.cpp
+++ b/src/frontends/qt4/InGuiThread.cpp
@@ -22,17 +22,19 @@ namespace frontend {
 
 IntoGuiThreadMover::IntoGuiThreadMover()
 {
-	moveToThread(QApplication::instance()->thread());
-	connect(this, SIGNAL(triggerCall()), this, SLOT(doFunctionCall()),
-	        Qt::QueuedConnection);
 }
 
 
 void IntoGuiThreadMover::callInGuiThread()
 {
-	if (QThread::currentThread() == QApplication::instance()->thread()) {
+	QThread* gui_thread = QApplication::instance()->thread();
+	if (QThread::currentThread() == gui_thread) {
 		synchronousFunctionCall();
 	} else {
+		moveToThread(gui_thread);
+		connect(this, SIGNAL(triggerCall()), this, SLOT(doFunctionCall()),
+		        Qt::QueuedConnection);
+		// TODO try with condition, it's maybe cheaper
 		QEventLoop loop;
 		connect(this, SIGNAL(called()), &loop, SLOT(quit()));
 		Q_EMIT triggerCall();