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):
12 def __init__(self, session, parent = None):
13 self.skinName = self.__class__.__name__
14 self.session = session
16 GUISkin.__init__(self)
19 self.onFirstExecBegin = [ ]
20 self.onExecBegin = [ ]
29 # already shown is false until the screen is really shown (after creation)
30 self.already_shown = False
34 # in order to support screens *without* a help,
35 # we need the list in every screen. how ironic.
38 self.close_on_next_exec = None
42 # stand alone screens (for example web screens)
43 # don't care about having or not having focus.
44 self.stand_alone = False
47 self.active_components = [ ]
48 if self.close_on_next_exec is not None:
49 tmp = self.close_on_next_exec
50 self.close_on_next_exec = None
54 single = self.onFirstExecBegin
55 self.onFirstExecBegin = []
56 for x in self.onExecBegin + single:
58 if not self.stand_alone and self.session.current_dialog != self:
61 # assert self.session == None, "a screen can only exec once per time"
62 # self.session = session
64 for val in self.values() + self.renderer:
66 if not self.stand_alone and self.session.current_dialog != self:
68 self.active_components.append(val)
72 for x in self.onShown:
76 # for (name, val) in self.items():
77 for val in self.active_components:
79 del self.active_components
80 # assert self.session != None, "execEnd on non-execing screen!"
84 # never call this directly - it will be called from the session!
87 for x in self.onClose:
90 # fixup circular references
94 # first disconnect all render from their sources.
95 # we might split this out into a "unskin"-call,
96 # but currently we destroy the screen afterwards
98 for val in self.renderer:
99 val.disconnectAll() # disconnected converter/sources and probably destroy them
102 for (name, val) in self.items():
106 for val in self.renderer:
111 # really delete all elements now
112 self.__dict__.clear()
114 def close(self, *retval):
115 if not self.in_close:
117 self.close_on_next_exec = retval
120 self.session.close(self, *retval)
122 def setFocus(self, o):
123 self.instance.setFocus(o.instance)
126 if (self.shown and self.already_shown) or not self.instance:
129 self.already_shown = True
131 for x in self.onShow:
133 for val in self.values() + self.renderer:
134 if isinstance(val, GUIComponent) or isinstance(val, Source):
138 if not self.shown or not self.instance:
142 for x in self.onHide:
144 for val in self.values() + self.renderer:
145 if isinstance(val, GUIComponent) or isinstance(val, Source):
149 return str(type(self))
151 def getRelatedScreen(self, name):
152 if name == "session":
153 return self.session.screen
154 elif name == "parent":
156 elif name == "global":
157 return self.global_screen