X-Git-Url: http://code.vuplus.com/gitweb/?p=vuplus_dvbapp;a=blobdiff_plain;f=lib%2Fpython%2FScreens%2FScreen.py;h=92efb7053b7e209e7fc5c4b92af9174c7e5ae51b;hp=ef9b2bb003452c4cd9141ff4d6bc67255d3861ca;hb=b3b1977dd9ef8a27d2b313d0c5934718ef682665;hpb=a4da9cccc2575c4bf299bde9594dad3e049ddf6a

diff --git a/lib/python/Screens/Screen.py b/lib/python/Screens/Screen.py
index ef9b2bb..92efb70 100644
--- a/lib/python/Screens/Screen.py
+++ b/lib/python/Screens/Screen.py
@@ -1,37 +1,159 @@
-from Components.HTMLSkin import *
-from Components.GUISkin import *
-
-import sys
+from Components.HTMLSkin import HTMLSkin
+from Components.GUISkin import GUISkin
+from Components.Sources.Source import Source
+from Components.GUIComponent import GUIComponent
 
 class Screen(dict, HTMLSkin, GUISkin):
-	""" bla """
 
-	def __init__(self, session):
+	ALLOW_SUSPEND = False
+
+	global_screen = None
+
+	def __init__(self, session, parent = None):
 		self.skinName = self.__class__.__name__
 		self.session = session
+		self.parent = parent
 		GUISkin.__init__(self)
+
+		self.onClose = [ ]
+		self.onFirstExecBegin = [ ]
+		self.onExecBegin = [ ]
+		self.onShown = [ ]
+
+		self.onShow = [ ]
+		self.onHide = [ ]
+
+		self.execing = False
 		
+		self.shown = True
+		# already shown is false until the screen is really shown (after creation)
+		self.already_shown = False
+
+		self.renderer = [ ]
+
+		# in order to support screens *without* a help,
+		# we need the list in every screen. how ironic.
+		self.helpList = [ ]
+
+		self.close_on_next_exec = None
+
+		self.in_close = False
+
+		# stand alone screens (for example web screens)
+		# don't care about having or not having focus.
+		self.stand_alone = False
+
 	def execBegin(self):
-#		assert self.session == None, "a screen can only exec one per time"
-#		self.session = session
-		for (name, val) in self.items():
-			val.execBegin()
+		self.active_components = [ ]
+		if self.close_on_next_exec is not None:
+			tmp = self.close_on_next_exec
+			self.close_on_next_exec = None
+			self.execing = True
+			self.close(*tmp)
+		else:
+			single = self.onFirstExecBegin
+			self.onFirstExecBegin = []
+			for x in self.onExecBegin + single:
+				x()
+				if not self.stand_alone and self.session.current_dialog != self:
+					return
+
+#			assert self.session == None, "a screen can only exec once per time"
+#			self.session = session
+
+			for val in self.values() + self.renderer:
+				val.execBegin()
+				if not self.stand_alone and self.session.current_dialog != 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):
+		self.hide()
+		for x in self.onClose:
+			x()
+		
+		# fixup circular references
+		del self.helpList
 		GUISkin.close(self)
+
+		# first disconnect all render from their sources.
+		# we might split this out into a "unskin"-call,
+		# but currently we destroy the screen afterwards
+		# anyway.
+		for val in self.renderer:
+			val.disconnectAll()  # disconnected converter/sources and probably destroy them
 		
 		del self.session
 		for (name, val) in self.items():
-			print "%s -> %d" % (name, sys.getrefcount(val))
+			val.destroy()
 			del self[name]
+		
+		for val in self.renderer:
+			val.destroy()
+		
+		self.renderer = [ ]
+		
+		# really delete all elements now
+		self.__dict__.clear()
 	
-	def close(self, retval=None):
-		self.session.close()
+	def close(self, *retval):
+		if not self.in_close:
+			if not self.execing:
+				self.close_on_next_exec = retval
+			else:
+				self.in_close = True
+				self.session.close(self, *retval)
+
+	def setFocus(self, o):
+		self.instance.setFocus(o.instance)
+
+	def show(self):
+		if (self.shown and self.already_shown) or not self.instance:
+			return
+		self.shown = True
+		self.already_shown = True
+		self.instance.show()
+		for x in self.onShow:
+			x()
+		for val in self.values() + self.renderer:
+			if isinstance(val, GUIComponent) or isinstance(val, Source):
+				val.onShow()
+
+	def hide(self):
+		if not self.shown or not self.instance:
+			return
+		self.shown = False
+		self.instance.hide()
+		for x in self.onHide:
+			x()
+		for val in self.values() + self.renderer:
+			if isinstance(val, GUIComponent) or isinstance(val, Source):
+				val.onHide()
+
+	def __repr__(self):
+		return str(type(self))
 
+	def getRelatedScreen(self, name):
+		if name == "session":
+			return self.session.screen
+		elif name == "parent":
+			return self.parent
+		elif name == "global":
+			return self.global_screen
+		else:
+			return None