wxPython/src/_event_ex.py

   1
   2
   3 #---------------------------------------------------------------------------
   4
   5 class PyEventBinder(object):
   6     """
   7     Instances of this class are used to bind specific events to event
   8     handlers.
   9     """
  10     def __init__(self, evtType, expectedIDs=0):
  11         if expectedIDs not in [0, 1, 2]:
  12             raise ValueError, "Invalid number of expectedIDs"
  13         self.expectedIDs = expectedIDs
  14
  15         if type(evtType) == list or type(evtType) == tuple:
  16             self.evtType = evtType
  17         else:
  18             self.evtType = [evtType]
  19
  20
  21     def Bind(self, target, id1, id2, function):
  22         """Bind this set of event types to target."""
  23         for et in self.evtType:
  24             target.Connect(id1, id2, et, function)
  25
  26
  27     def Unbind(self, target, id1, id2):
  28         """Remove an event binding."""
  29         success = 0
  30         for et in self.evtType:
  31             success += target.Disconnect(id1, id2, et)
  32         return success != 0
  33
  34     def _getEvtType(self):
  35         """
  36         Make it easy to get to the default wxEventType typeID for this
  37         event binder.
  38         """
  39         return self.evtType[0]
  40
  41     typeId = property(_getEvtType)
  42
  43
  44     def __call__(self, *args):
  45         """
  46         For backwards compatibility with the old EVT_* functions.
  47         Should be called with either (window, func), (window, ID,
  48         func) or (window, ID1, ID2, func) parameters depending on the
  49         type of the event.
  50         """
  51         assert len(args) == 2 + self.expectedIDs
  52         id1 = wx.ID_ANY
  53         id2 = wx.ID_ANY
  54         target = args[0]
  55         if self.expectedIDs == 0:
  56             func = args[1]
  57         elif self.expectedIDs == 1:
  58             id1 = args[1]
  59             func = args[2]
  60         elif self.expectedIDs == 2:
  61             id1 = args[1]
  62             id2 = args[2]
  63             func = args[3]
  64         else:
  65             raise ValueError, "Unexpected number of IDs"
  66
  67         self.Bind(target, id1, id2, func)
  68
  69
  70 # These two are square pegs that don't fit the PyEventBinder hole...
  71 def EVT_COMMAND(win, id, cmd, func):
  72     win.Connect(id, -1, cmd, func)
  73 def EVT_COMMAND_RANGE(win, id1, id2, cmd, func):
  74     win.Connect(id1, id2, cmd, func)
  75
  76
  77 #---------------------------------------------------------------------------