Replace the temporary hack used by ksmserver to detect whether

the compositing manager provides logout effect with another
temporary hack that is not specific to KWin.
CCMAIL: Dennis Kasprzyk <onestone@opencompositing.org>


svn path=/trunk/KDE/kdebase/workspace/; revision=766848

effects/logout.cpp

@@ -33,6 +33,13 @@ LogoutEffect::LogoutEffect()
     : progress( 0 )
     , logout_window( NULL )
     {
+    char net_wm_cm_name[ 100 ];
+    sprintf( net_wm_cm_name, "_NET_WM_CM_S%d", DefaultScreen( display()));
+    Atom net_wm_cm = XInternAtom( display(), net_wm_cm_name, False );
+    Window sel = XGetSelectionOwner( display(), net_wm_cm );
+    Atom hack = XInternAtom( display(), "_KWIN_LOGOUT_EFFECT", False );
+    XChangeProperty( display(), sel, hack, hack, 8, PropModeReplace, (unsigned char*)&hack, 1 );
+    // the atom is not removed when effect is destroyed, this is temporary anyway
     }
 
 void LogoutEffect::prePaintScreen( ScreenPrePaintData& data, int time )