code.vuplus.com Git - vuplus_dvbapp/blob - lib/python/Screens/Screen.py

   1 from Tools.Profile import profile
   2
   3 profile("LOAD:GUISkin")
   4 from Components.GUISkin import GUISkin
   5 profile("LOAD:Source")
   6 from Components.Sources.Source import Source
   7 profile("LOAD:GUIComponent")
   8 from Components.GUIComponent import GUIComponent
   9 profile("LOAD:eRCInput")
  10 from enigma import eRCInput
  11
  12 class Screen(dict, GUISkin):
  13
  14         False, SUSPEND_STOPS, SUSPEND_PAUSES = range(3)
  15         ALLOW_SUSPEND = False
  16
  17         global_screen = None
  18
  19         def __init__(self, session, parent = None):
  20                 dict.__init__(self)
  21                 self.skinName = self.__class__.__name__
  22                 self.session = session
  23                 self.parent = parent
  24                 GUISkin.__init__(self)
  25
  26                 self.onClose = [ ]
  27                 self.onFirstExecBegin = [ ]
  28                 self.onExecBegin = [ ]
  29                 self.onShown = [ ]
  30
  31                 self.onShow = [ ]
  32                 self.onHide = [ ]
  33
  34                 self.execing = False
  35
  36                 self.shown = True
  37                 # already shown is false until the screen is really shown (after creation)
  38                 self.already_shown = False
  39
  40                 self.renderer = [ ]
  41
  42                 # in order to support screens *without* a help,
  43                 # we need the list in every screen. how ironic.
  44                 self.helpList = [ ]
  45
  46                 self.close_on_next_exec = None
  47
  48                 # stand alone screens (for example web screens)
  49                 # don't care about having or not having focus.
  50                 self.stand_alone = False
  51                 self.keyboardMode = None
  52
  53         def saveKeyboardMode(self):
  54                 rcinput = eRCInput.getInstance()
  55                 self.keyboardMode = rcinput.getKeyboardMode()
  56
  57         def setKeyboardModeAscii(self):
  58                 rcinput = eRCInput.getInstance()
  59                 rcinput.setKeyboardMode(rcinput.kmAscii)
  60
  61         def setKeyboardModeNone(self):
  62                 rcinput = eRCInput.getInstance()
  63                 rcinput.setKeyboardMode(rcinput.kmNone)
  64
  65         def restoreKeyboardMode(self):
  66                 rcinput = eRCInput.getInstance()
  67                 if self.keyboardMode is not None:
  68                         rcinput.setKeyboardMode(self.keyboardMode)
  69
  70         def execBegin(self):
  71                 self.active_components = [ ]
  72                 if self.close_on_next_exec is not None:
  73                         tmp = self.close_on_next_exec
  74                         self.close_on_next_exec = None
  75                         self.execing = True
  76                         self.close(*tmp)
  77                 else:
  78                         single = self.onFirstExecBegin
  79                         self.onFirstExecBegin = []
  80                         for x in self.onExecBegin + single:
  81                                 x()
  82                                 if not self.stand_alone and self.session.current_dialog != self:
  83                                         return
  84
  85 #                       assert self.session == None, "a screen can only exec once per time"
  86 #                       self.session = session
  87
  88                         for val in self.values() + self.renderer:
  89                                 val.execBegin()
  90                                 if not self.stand_alone and self.session.current_dialog != self:
  91                                         return
  92                                 self.active_components.append(val)
  93
  94                         self.execing = True
  95
  96                         for x in self.onShown:
  97                                 x()
  98
  99         def execEnd(self):
 100                 active_components = self.active_components
 101 #               for (name, val) in self.items():
 102                 self.active_components = None
 103                 for val in active_components:
 104                         val.execEnd()
 105 #               assert self.session != None, "execEnd on non-execing screen!"
 106 #               self.session = None
 107                 self.execing = False
 108
 109         # never call this directly - it will be called from the session!
 110         def doClose(self):
 111                 self.hide()
 112                 for x in self.onClose:
 113                         x()
 114
 115                 # fixup circular references
 116                 del self.helpList
 117                 GUISkin.close(self)
 118
 119                 # first disconnect all render from their sources.
 120                 # we might split this out into a "unskin"-call,
 121                 # but currently we destroy the screen afterwards
 122                 # anyway.
 123                 for val in self.renderer:
 124                         val.disconnectAll()  # disconnected converter/sources and probably destroy them. Sources will not be destroyed.
 125
 126                 del self.session
 127                 for (name, val) in self.items():
 128                         val.destroy()
 129                         del self[name]
 130
 131                 self.renderer = [ ]
 132
 133                 # really delete all elements now
 134                 self.__dict__.clear()
 135
 136         def close(self, *retval):
 137                 if not self.execing:
 138                         self.close_on_next_exec = retval
 139                 else:
 140                         self.session.close(self, *retval)
 141
 142         def setFocus(self, o):
 143                 self.instance.setFocus(o.instance)
 144
 145         def show(self):
 146                 if (self.shown and self.already_shown) or not self.instance:
 147                         return
 148                 self.shown = True
 149                 self.already_shown = True
 150                 self.instance.show()
 151                 for x in self.onShow:
 152                         x()
 153                 for val in self.values() + self.renderer:
 154                         if isinstance(val, GUIComponent) or isinstance(val, Source):
 155                                 val.onShow()
 156
 157         def hide(self):
 158                 if not self.shown or not self.instance:
 159                         return
 160                 self.shown = False
 161                 self.instance.hide()
 162                 for x in self.onHide:
 163                         x()
 164                 for val in self.values() + self.renderer:
 165                         if isinstance(val, GUIComponent) or isinstance(val, Source):
 166                                 val.onHide()
 167
 168         def __repr__(self):
 169                 return str(type(self))
 170
 171         def getRelatedScreen(self, name):
 172                 if name == "session":
 173                         return self.session.screen
 174                 elif name == "parent":
 175                         return self.parent
 176                 elif name == "global":
 177                         return self.global_screen
 178                 else:
 179                         return None