allow two different behaviours when going into resume: SUSPEND_STOPS (default as...
[enigma2.git] / lib / python / Screens / Screen.py
index 5349291..7ac7841 100644 (file)
@@ -1,50 +1,64 @@
-from Components.HTMLSkin import *
-from Components.GUISkin import *
-from Components.Sources.Source import Source
+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):
+class Screen(dict, GUISkin):
 
+       False, SUSPEND_STOPS, SUSPEND_PAUSES = range(3)
        ALLOW_SUSPEND = False
 
-       def __init__(self, session):
+       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 = 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):
                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)
+                       self.close(*tmp)
                else:
                        single = self.onFirstExecBegin
                        self.onFirstExecBegin = []
                        for x in self.onExecBegin + single:
                                x()
-                               if self.session.current_dialog != self:
+                               if not self.stand_alone and self.session.current_dialog != self:
                                        return
 
 #                      assert self.session == None, "a screen can only exec once per time"
@@ -52,7 +66,7 @@ class Screen(dict, HTMLSkin, GUISkin):
 
                        for val in self.values() + self.renderer:
                                val.execBegin()
-                               if self.session.current_dialog != self:
+                               if not self.stand_alone and self.session.current_dialog != self:
                                        return
                                self.active_components.append(val)
 
@@ -62,10 +76,11 @@ class Screen(dict, HTMLSkin, GUISkin):
                                x()
        
        def execEnd(self):
+               active_components = self.active_components
 #              for (name, val) in self.items():
-               for val in self.active_components:
+               self.active_components = None
+               for val in active_components:
                        val.execEnd()
-               del self.active_components
 #              assert self.session != None, "execEnd on non-execing screen!"
 #              self.session = None
                self.execing = False
@@ -85,18 +100,15 @@ class Screen(dict, HTMLSkin, GUISkin):
                # but currently we destroy the screen afterwards
                # anyway.
                for val in self.renderer:
-                       val.disconnectAll()  # disconnected converter/sources and probably destroy them
-               
+                       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]
-               
-               for val in self.renderer:
-                       val.destroy()
-               
+
                self.renderer = [ ]
-               
+
                # really delete all elements now
                self.__dict__.clear()
        
@@ -110,9 +122,10 @@ class Screen(dict, HTMLSkin, GUISkin):
                self.instance.setFocus(o.instance)
 
        def show(self):
-               if self.shown:
+               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()
@@ -121,7 +134,7 @@ class Screen(dict, HTMLSkin, GUISkin):
                                val.onShow()
 
        def hide(self):
-               if not self.shown:
+               if not self.shown or not self.instance:
                        return
                self.shown = False
                self.instance.hide()
@@ -133,3 +146,13 @@ class Screen(dict, HTMLSkin, GUISkin):
 
        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