allow two different behaviours when going into resume: SUSPEND_STOPS (default as...
[enigma2.git] / lib / python / Screens / Screen.py
index a95c765..7ac7841 100644 (file)
-from Components.HTMLSkin import *
-from Components.GUISkin import *
+from Tools.Profile import profile
 
-import sys
+profile("LOAD:GUISkin")
+from Components.GUISkin import GUISkin
+profile("LOAD:Source")
+from Components.Sources.Source import Source
+profile("LOAD:GUIComponent")
+from Components.GUIComponent import GUIComponent
 
-class Screen(dict, HTMLSkin, GUISkin):
-       """ bla """
+class Screen(dict, GUISkin):
 
-       def __init__(self, session):
+       False, SUSPEND_STOPS, SUSPEND_PAUSES = range(3)
+       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
+
+               # 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():
+               active_components = self.active_components
+#              for (name, val) in self.items():
+               self.active_components = None
+               for val in active_components:
                        val.execEnd()
 #              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):
-               GUISkin.close(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. Sources will not be destroyed.
+
                del self.session
                for (name, val) in self.items():
+                       val.destroy()
                        del self[name]
+
+               self.renderer = [ ]
+
+               # really delete all elements now
+               self.__dict__.clear()
        
        def close(self, *retval):
-               self.session.close(*retval)
+               if not self.execing:
+                       self.close_on_next_exec = retval
+               else:
+                       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