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
  35     def __call__(self, *args):
  36         """
  37         For backwards compatibility with the old EVT_* functions.
  38         Should be called with either (window, func), (window, ID,
  39         func) or (window, ID1, ID2, func) parameters depending on the
  40         type of the event.
  41         """
  42         assert len(args) == 2 + self.expectedIDs
  43         id1 = wx.ID_ANY
  44         id2 = wx.ID_ANY
  45         target = args[0]
  46         if self.expectedIDs == 0:
  47             func = args[1]
  48         elif self.expectedIDs == 1:
  49             id1 = args[1]
  50             func = args[2]
  51         elif self.expectedIDs == 2:
  52             id1 = args[1]
  53             id2 = args[2]
  54             func = args[3]
  55         else:
  56             raise ValueError, "Unexpected number of IDs"
  57
  58         self.Bind(target, id1, id2, func)
  59
  60
  61 # These two are square pegs that don't fit the PyEventBinder hole...
  62 def EVT_COMMAND(win, id, cmd, func):
  63     win.Connect(id, -1, cmd, func)
  64 def EVT_COMMAND_RANGE(win, id1, id2, cmd, func):
  65     win.Connect(id1, id2, cmd, func)
  66
  67
  68 #---------------------------------------------------------------------------