X-Git-Url: https://git.cweiske.de/enigma2.git/blobdiff_plain/dd5eb76b9fe3fdc9e31e405176c0de47c310adb3..7b0d371a7bbfb9e8d624eec9ed97e9a835f75ca7:/lib/python/Components/GUIComponent.py

diff --git a/lib/python/Components/GUIComponent.py b/lib/python/Components/GUIComponent.py
index 401a004d..deb8b34a 100644
--- a/lib/python/Components/GUIComponent.py
+++ b/lib/python/Components/GUIComponent.py
@@ -7,6 +7,8 @@ class GUIComponent(object):
 	
 	def __init__(self):
 		self.instance = None
+		self.onVisibilityChange = [ ]
+		self.__visible = 0
 		self.visible = 1
 		self.skinAttributes = None
 	
@@ -31,10 +33,10 @@ class GUIComponent(object):
 			self.instance.hide()
 		
 		if self.skinAttributes is None:
-			print "warning, skin is missing some elements."
-			return
+			return False
 
 		skin.applyAllAttributes(self.instance, desktop, self.skinAttributes)
+		return True
 
 	def move(self, x, y = None):
 		# we assume, that x is already an ePoint
@@ -50,14 +52,22 @@ class GUIComponent(object):
 		self.instance.setZPosition(z)
 
 	def show(self):
+		old = self.__visible
 		self.__visible = 1
 		if self.instance is not None:
 			self.instance.show()
+		if old != self.__visible:
+			for fnc in self.onVisibilityChange:
+				fnc(True)
 
 	def hide(self):
+		old = self.__visible
 		self.__visible = 0
 		if self.instance is not None:
 			self.instance.hide()
+		if old != self.__visible:
+			for fnc in self.onVisibilityChange:
+				fnc(False)
 
 	def getVisible(self):
 		return self.__visible