1 from Components.HTMLSkin import HTMLSkin
2 from Components.GUISkin import GUISkin
3 from Components.Sources.Source import Source
4 from Components.GUIComponent import GUIComponent
6 class Screen(dict, HTMLSkin, GUISkin):
10 def __init__(self, session):
11 self.skinName = self.__class__.__name__
12 self.session = session
13 GUISkin.__init__(self)
16 self.onFirstExecBegin = [ ]
17 self.onExecBegin = [ ]
26 # already shown is false until the screen is really shown (after creation)
27 self.already_shown = False
31 # in order to support screens *without* a help,
32 # we need the list in every screen. how ironic.
35 self.close_on_next_exec = None
37 # stand alone screens (for example web screens)
38 # don't care about having or not having focus.
39 self.stand_alone = False
42 self.active_components = [ ]
43 if self.close_on_next_exec is not None:
44 tmp = self.close_on_next_exec
45 self.close_on_next_exec = None
49 single = self.onFirstExecBegin
50 self.onFirstExecBegin = []
51 for x in self.onExecBegin + single:
53 if not self.stand_alone and self.session.current_dialog != self:
56 # assert self.session == None, "a screen can only exec once per time"
57 # self.session = session
59 for val in self.values() + self.renderer:
61 if not self.stand_alone and self.session.current_dialog != self:
63 self.active_components.append(val)
67 for x in self.onShown:
71 # for (name, val) in self.items():
72 for val in self.active_components:
74 del self.active_components
75 # assert self.session != None, "execEnd on non-execing screen!"
79 # never call this directly - it will be called from the session!
82 for x in self.onClose:
85 # fixup circular references
89 # first disconnect all render from their sources.
90 # we might split this out into a "unskin"-call,
91 # but currently we destroy the screen afterwards
93 for val in self.renderer:
94 val.disconnectAll() # disconnected converter/sources and probably destroy them
97 for (name, val) in self.items():
101 for val in self.renderer:
106 # really delete all elements now
107 self.__dict__.clear()
109 def close(self, *retval):
111 self.close_on_next_exec = retval
113 self.session.close(self, *retval)
115 def setFocus(self, o):
116 self.instance.setFocus(o.instance)
119 if (self.shown and self.already_shown) or not self.instance:
122 self.already_shown = True
124 for x in self.onShow:
126 for val in self.values() + self.renderer:
127 if isinstance(val, GUIComponent) or isinstance(val, Source):
131 if not self.shown or not self.instance:
135 for x in self.onHide:
137 for val in self.values() + self.renderer:
138 if isinstance(val, GUIComponent) or isinstance(val, Source):
142 return str(type(self))