Don't use the gl lists when a new window is added. This prevents the added window becoming black.

svn path=/trunk/KDE/kdebase/workspace/; revision=941274

effects/cube/cube.cpp

@@ -2068,4 +2068,12 @@ void CubeEffect::tabBoxClosed()
         }
     }
 
+void CubeEffect::windowAdded( EffectWindow* )
+    {
+    // when there is a new window we have to paint it once without using GL List
+    // to prevent that the window is black
+    if( activated )
+        useList = false;
+    }
+
 } // namespace

effects/cube/cube.h

@@ -51,6 +51,7 @@ class CubeEffect
         virtual void tabBoxAdded( int mode );
         virtual void tabBoxUpdated();
         virtual void tabBoxClosed();
+        virtual void windowAdded( EffectWindow* );
 
         static bool supported();
     private slots: