add onFirstExecBegin for actions, performed only once when a Screen is executed for...

time

diff --git a/lib/python/Screens/Screen.py b/lib/python/Screens/Screen.py
index 78a88ad841c6c54815ad1d794cced8f62885c0da..989f90a9e6a5d9dfc6185ecf91955090bee06e2b 100644 (file)
--- a/lib/python/Screens/Screen.py
+++ b/lib/python/Screens/Screen.py
@@ -14,6 +14,7 @@ class Screen(dict, HTMLSkin, GUISkin):
                GUISkin.__init__(self)
                
                self.onClose = [ ]
+               self.onFirstExecBegin = [ ]
                self.onExecBegin = [ ]
                self.onShown = [ ]
                
@@ -31,7 +32,10 @@ class Screen(dict, HTMLSkin, GUISkin):
                
        def execBegin(self):
                self.active_components = [ ]
-               for x in self.onExecBegin:
+
+               single = self.onFirstExecBegin
+               self.onFirstExecBegin = []
+               for x in self.onExecBegin + single:
                        x()
                        if self.session.current_dialog != self:
                                return