lib/python/Components/ActionMap.py

   1 from enigma import eActionMap
   2
   3 class ActionMap:
   4         def __init__(self, contexts = [ ], actions = { }, prio=0):
   5                 self.actions = actions
   6                 self.contexts = contexts
   7                 self.prio = prio
   8                 self.p = eActionMap.getInstance()
   9                 self.bound = False
  10                 self.exec_active = False
  11                 self.enabled = True
  12
  13         def setEnabled(self, enabled):
  14                 self.enabled = enabled
  15                 self.checkBind()
  16
  17         def doBind(self):
  18                 if not self.bound:
  19                         for ctx in self.contexts:
  20                                 self.p.bindAction(ctx, self.prio, self.action)
  21                         self.bound = True
  22
  23         def doUnbind(self):
  24                 if self.bound:
  25                         for ctx in self.contexts:
  26                                 self.p.unbindAction(ctx, self.action)
  27                         self.bound = False
  28
  29         def checkBind(self):
  30                 if self.exec_active and self.enabled:
  31                         self.doBind()
  32                 else:
  33                         self.doUnbind()
  34
  35         def execBegin(self):
  36                 self.exec_active = True
  37                 self.checkBind()
  38
  39         def execEnd(self):
  40                 self.exec_active = False
  41                 self.checkBind()
  42
  43         def action(self, context, action):
  44                 print " ".join(("action -> ", context, action))
  45                 if self.actions.has_key(action):
  46                         res = self.actions[action]()
  47                         if res is not None:
  48                                 return res
  49                         return 1
  50                 else:
  51                         print "unknown action %s/%s! typo in keymap?" % (context, action)
  52                         return 0
  53
  54         def destroy(self):
  55                 pass
  56
  57 class NumberActionMap(ActionMap):
  58         def action(self, contexts, action):
  59                 numbers = ("0", "1", "2", "3", "4", "5", "6", "7", "8", "9")
  60                 if (action in numbers and self.actions.has_key(action)):
  61                         res = self.actions[action](int(action))
  62                         if res is not None:
  63                                 return res
  64                         return 1
  65                 else:
  66                         return ActionMap.action(self, contexts, action)
  67
  68 class HelpableActionMap(ActionMap):
  69         """An Actionmap which automatically puts the actions into the helpList.
  70
  71         Note that you can only use ONE context here!"""
  72
  73         # sorry for this complicated code.
  74         # it's not more than converting a "documented" actionmap
  75         # (where the values are possibly (function, help)-tuples)
  76         # into a "classic" actionmap, where values are just functions.
  77         # the classic actionmap is then passed to the ActionMap constructor,
  78         # the collected helpstrings (with correct context, action) is
  79         # added to the screen's "helpList", which will be picked up by
  80         # the "HelpableScreen".
  81         def __init__(self, parent, context, actions = { }, prio=0):
  82                 alist = [ ]
  83                 adict = { }
  84                 for (action, funchelp) in actions.iteritems():
  85                         # check if this is a tuple
  86                         if isinstance(funchelp, tuple):
  87                                 alist.append((action, funchelp[1]))
  88                                 adict[action] = funchelp[0]
  89                         else:
  90                                 adict[action] = funchelp
  91
  92                 ActionMap.__init__(self, [context], adict, prio)
  93
  94                 parent.helpList.append((self, context, alist))