wxPython/demo/PythonEvents.py

   1
   2 import  sys
   3
   4 import  wx
   5
   6 #----------------------------------------------------------------------
   7
   8 # This shows the new 'official' way to do custom events as derived
   9 # from the wxPython 2.5 migration guide.
  10
  11 #######################################################\
  12 #  *** Old and busted ***                              |
  13 #                                                      |
  14 # myEVT_BUTTON_CLICKPOS = wx.NewEventType()            |
  15 #                                                      |
  16 # def EVT_BUTTON_CLICKPOS(win, id, func):              |
  17 #     win.Connect(id, -1, myEVT_BUTTON_CLICKPOS, func) |
  18 #######################################################/
  19
  20 #############################\
  21 #   *** The new Hottness *** |
  22 #############################/
  23 myEVT_BUTTON_CLICKPOS = wx.NewEventType()
  24 EVT_BUTTON_CLICKPOS = wx.PyEventBinder(myEVT_BUTTON_CLICKPOS, 1)
  25
  26 #----------------------------------------------------------------------
  27
  28
  29 class MyEvent(wx.PyCommandEvent):
  30     def __init__(self, evtType, id):
  31         wx.PyCommandEvent.__init__(self, evtType, id)
  32         self.myVal = None
  33
  34     #def __del__(self):
  35     #    print '__del__'
  36     #    wx.PyCommandEvent.__del__(self)
  37
  38     def SetMyVal(self, val):
  39         self.myVal = val
  40
  41     def GetMyVal(self):
  42         return self.myVal
  43
  44
  45 class MyButton(wx.Button):
  46     def __init__(self, parent, id, txt, pos):
  47         wx.Button.__init__(self, parent, id, txt, pos)
  48         self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
  49
  50     def OnLeftDown(self, event):
  51         pt = event.GetPosition()
  52         evt = MyEvent(myEVT_BUTTON_CLICKPOS, self.GetId())
  53         evt.SetMyVal(pt)
  54         #print id(evt), sys.getrefcount(evt)
  55         self.GetEventHandler().ProcessEvent(evt)
  56         #print id(evt), sys.getrefcount(evt)
  57         event.Skip()
  58
  59
  60
  61 class TestPanel(wx.Panel):
  62     def __init__(self, parent, log):
  63         wx.Panel.__init__(self, parent, -1)
  64         self.log = log
  65
  66         b = MyButton(self, -1, " Click me ", (30,30))
  67         self.Bind(wx.EVT_BUTTON, self.OnClick, id=b.GetId())
  68
  69         # This is our custom event binder created above.
  70         self.Bind(EVT_BUTTON_CLICKPOS, self.OnMyEvent, id=b.GetId())
  71
  72         wx.StaticText(
  73             self, -1, "Please see the Overview and Demo Code for details...",
  74             (30, 80)
  75             )
  76
  77
  78     def OnClick(self, event):
  79         self.log.WriteText("OnClick\n")
  80
  81     def OnMyEvent(self, event):
  82         #print id(event), sys.getrefcount(event)
  83         self.log.WriteText("MyEvent: %s\n" % (event.GetMyVal(), ) )
  84
  85
  86 #----------------------------------------------------------------------
  87
  88 def runTest(frame, nb, log):
  89     win = TestPanel(nb, log)
  90     return win
  91
  92 #----------------------------------------------------------------------
  93
  94
  95 overview = """\
  96 This demo is a contrived example of defining an event class in wxPython and
  97 sending it up the containment hierarchy for processing.
  98
  99 V2.5 note: this demo also shows the new style of creating event binders that
 100 is required if you used the *.Bind() method of setting up event handlers.
 101 """
 102
 103
 104 if __name__ == '__main__':
 105     import sys,os
 106     import run
 107     run.main(['', os.path.basename(sys.argv[0])])
 108