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                 self.execing = False
  19
  20                 # in order to support screens *without* a help,
  21                 # we need the list in every screen. how ironic.
  22                 self.helpList = [ ]
  23
  24         def execBegin(self):
  25                 self.active_components = [ ]
  26                 for x in self.onExecBegin:
  27                         x()
  28                         if self.session.currentDialog != self:
  29                                 return
  30
  31 #               assert self.session == None, "a screen can only exec one per time"
  32 #               self.session = session
  33
  34                 for (name, val) in self.items():
  35                         val.execBegin()
  36                         if self.session.currentDialog != self:
  37                                 return
  38                         self.active_components.append(val)
  39
  40                 self.execing = True
  41
  42                 for x in self.onShown:
  43                         x()
  44
  45         def execEnd(self):
  46 #               for (name, val) in self.items():
  47                 for val in self.active_components:
  48                         val.execEnd()
  49                 del self.active_components
  50 #               assert self.session != None, "execEnd on non-execing screen!"
  51 #               self.session = None
  52                 self.execing = False
  53
  54         # never call this directly - it will be called from the session!
  55         def doClose(self):
  56                 for x in self.onClose:
  57                         x()
  58
  59                 # fixup circular references
  60                 del self.helpList
  61                 GUISkin.close(self)
  62
  63                 del self.session
  64                 for (name, val) in self.items():
  65                         del self[name]
  66
  67         def close(self, *retval):
  68                 self.session.close(*retval)
  69
  70         def setFocus(self, o):
  71                 self.instance.setFocus(o.instance)