#589: avoid races when sending focus changes: delay sending the "lost…

… focus" (focus=0) so that a new window can gain focus, which allows us to avoid doing a "reset_focus" on the server side

git-svn-id: https://xpra.org/svn/Xpra/trunk@6688 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/client/ui_client_base.py

@@ -738,7 +738,13 @@ def update_focus(self, wid, gotit):
             if self.keyboard_helper:
                 self.keyboard_helper.clear_repeat()
             if self._focused:
-                self.send_focus(0)
+                #send the lost-focus via a timer and re-check it
+                #(this allows a new window to gain focus without having to do a reset_focus)
+                def send_lost_focus():
+                    #check that a new window has not gained focus since:
+                    if self._focused is None:
+                        self.send_focus(0)
+                self.timeout_add(20, send_lost_focus)
                 self._focused = None
 
     def do_force_ungrab(self, wid):