lib/python/Screens/Screen.py

   1 from Components.HTMLSkin import *
   2 from Components.GUISkin import *
   3
   4 import sys
   5
   6 class Screen(dict, HTMLSkin, GUISkin):
   7         """ bla """
   8
   9         def __init__(self, session):
  10                 self.skinName = self.__class__.__name__
  11                 self.session = session
  12                 GUISkin.__init__(self)
  13
  14                 self.onClose = [ ]
  15                 self.onExecBegin = [ ]
  16                 self.onShown = [ ]
  17
  18                 # in order to support screens *without* a help,
  19                 # we need the list in every screen. how ironic.
  20                 self.helpList = [ ]
  21
  22         def execBegin(self):
  23                 for x in self.onExecBegin:
  24                         x()
  25 #               assert self.session == None, "a screen can only exec one per time"
  26 #               self.session = session
  27                 for (name, val) in self.items():
  28                         val.execBegin()
  29
  30                 for x in self.onShown:
  31                         x()
  32
  33         def execEnd(self):
  34                 for (name, val) in self.items():
  35                         val.execEnd()
  36 #               assert self.session != None, "execEnd on non-execing screen!"
  37 #               self.session = None
  38
  39         # never call this directly - it will be called from the session!
  40         def doClose(self):
  41                 for x in self.onClose:
  42                         x()
  43
  44                 # fixup circular references
  45                 del self.helpList
  46                 GUISkin.close(self)
  47
  48                 del self.session
  49                 for (name, val) in self.items():
  50                         del self[name]
  51
  52         def close(self, *retval):
  53                 self.session.close(*retval)
  54
  55         def setFocus(self, o):
  56                 self.instance.setFocus(o.instance)