X-Git-Url: https://git.cweiske.de/enigma2.git/blobdiff_plain/b44c3ff96ad305e2d5c0eb87ce3aa4a9abe3cb77..198c2588d73a87f3106412467ff72af643b8f0ed:/lib/python/Screens/Screen.py

diff --git a/lib/python/Screens/Screen.py b/lib/python/Screens/Screen.py
index b1e5a51e..a8d0b048 100644
--- a/lib/python/Screens/Screen.py
+++ b/lib/python/Screens/Screen.py
@@ -12,22 +12,48 @@ class Screen(dict, HTMLSkin, GUISkin):
 		GUISkin.__init__(self)
 		
 		self.onClose = [ ]
+		self.onExecBegin = [ ]
+		self.onShown = [ ]
+		
+		self.onShow = [ ]
+		self.onHide = [ ]
+		
+		self.execing = False
+		self.shown = False
 		
 		# in order to support screens *without* a help,
 		# we need the list in every screen. how ironic.
 		self.helpList = [ ]
 		
 	def execBegin(self):
+		self.active_components = [ ]
+		for x in self.onExecBegin:
+			x()
+			if self.session.currentDialog != self:
+				return
+
 #		assert self.session == None, "a screen can only exec one per time"
 #		self.session = session
+
 		for (name, val) in self.items():
 			val.execBegin()
+			if self.session.currentDialog != self:
+				return
+			self.active_components.append(val)
+
+		self.execing = True
+	
+		for x in self.onShown:
+			x()
 	
 	def execEnd(self):
-		for (name, val) in self.items():
+#		for (name, val) in self.items():
+		for val in self.active_components:
 			val.execEnd()
+		del self.active_components
 #		assert self.session != None, "execEnd on non-execing screen!"
 #		self.session = None
+		self.execing = False
 	
 	# never call this directly - it will be called from the session!
 	def doClose(self):
@@ -41,9 +67,28 @@ class Screen(dict, HTMLSkin, GUISkin):
 		del self.session
 		for (name, val) in self.items():
 			del self[name]
+		
+		# really delete all elements now
+		self.__dict__.clear()
 	
 	def close(self, *retval):
 		self.session.close(*retval)
 
 	def setFocus(self, o):
 		self.instance.setFocus(o.instance)
+
+	def show(self):
+		if self.shown:
+			return
+		self.shown = True
+		self.instance.show()
+		for x in self.onShow:
+			x()
+
+	def hide(self):
+		if not self.shown:
+			return
+		self.shown = False
+		self.instance.hide()
+		for x in self.onHide:
+			x()