From d26e3a64c49773b78146c7c79e4c7a7cc0fc53bd Mon Sep 17 00:00:00 2001
From: Hugo Pereira Da Costa <hugo@oxygen-icons.org>
Date: Fri, 26 Jun 2009 03:19:22 +0000
Subject: [PATCH] Backport r987422: Added dbus call to get whether kwin
 compositing is enabled or not, rather than systematically returning false.
 This enables nicer painting of decoration previews.

svn path=/branches/KDE/4.3/kdebase/workspace/; revision=987424
---
 kcmkwin/kwindecoration/preview.cpp | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/kcmkwin/kwindecoration/preview.cpp b/kcmkwin/kwindecoration/preview.cpp
index 8284127a53..e52ba37dbb 100644
--- a/kcmkwin/kwindecoration/preview.cpp
+++ b/kcmkwin/kwindecoration/preview.cpp
@@ -23,6 +23,8 @@
 #include <klocale.h>
 #include <kconfig.h>
 #include <kglobal.h>
+#include <QDBusMessage>
+#include <QDBusConnection>
 #include <QLabel>
 #include <QStyle>
 //Added by qt3to4:
@@ -440,7 +442,20 @@ void KDecorationPreviewBridge::grabXServer( bool )
 
 bool KDecorationPreviewBridge::compositingActive() const
     {
-    return false;
+        
+        QDBusMessage message = QDBusMessage::createMethodCall( "org.kde.kwin", "/KWin", "org.kde.KWin", "compositingActive" );
+        QDBusMessage reply = QDBusConnection::sessionBus().call( message );
+        if( reply.type() != QDBusMessage::ReplyMessage ) 
+        {
+            return false;
+        }
+        
+        if( reply.arguments().empty() ) {
+            return false;
+        }
+        
+        return reply.arguments()[0].toBool();
+
     }
 
 KDecorationPreviewOptions::KDecorationPreviewOptions()