82 lines
2.0 KiB
Python
82 lines
2.0 KiB
Python
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import wx
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# This class is just an experiment to see how easy it would be to
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# handle simulating transfer of ownership of object to a 'parent'
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# object, and then automatically calling Destroy on those when the
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# parent is destroyed. Conclusion: It's not too hard at all. Now,
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# what should I do with it...
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class DestroyWrapper(object):
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def __init__(self):
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import weakref
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self.items = weakref.WeakValueDictionary()
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def AddItem(self, obj):
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self.items[len(self.items)+1] = obj
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def __del__(self):
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for item in self.items.values():
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item.Destroy()
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class MyEvtHandler(wx.EvtHandler):
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instCount = 0
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def __init__(self):
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wx.EvtHandler.__init__(self)
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MyEvtHandler.instCount += 1
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self.cnt = MyEvtHandler.instCount
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self.Bind(wx.EVT_CHECKBOX, self.OnCheckBox)
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def __del__(self):
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print "%02d: deleted" % self.cnt
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def OnCheckBox(self, evt):
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print "%02d: %s" % (self.cnt, evt.IsChecked())
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evt.Skip()
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class MyFrame(wx.Frame):
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def __init__(self):
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wx.Frame.__init__(self, None, title="wx.EvtHandler Test")
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p = wx.Panel(self)
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pushBtn = wx.Button(p, -1, "Push EvtHandler", (20,20))
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popBtn = wx.Button(p, -1, "Pop EvtHandler", (20,60))
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checkBox = wx.CheckBox(p, -1, "Test EvtHandler", (200, 25))
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self.Bind(wx.EVT_BUTTON, self.OnPushBtn, pushBtn)
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self.Bind(wx.EVT_BUTTON, self.OnPopBtn, popBtn)
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## self.dw = DestroyWrapper()
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def OnPushBtn(self, evt):
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eh = MyEvtHandler()
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self.PushEventHandler(eh)
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## self.dw.AddItem(eh)
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print "%02d: pushed" % eh.cnt
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def OnPopBtn(self, evt):
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eh = self.GetEventHandler()
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if eh.this == self.this:
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print "All already popped!"
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else:
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eh = self.PopEventHandler()
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print "%02d: popped( %s )" % (eh.cnt, eh.__class__)
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eh.Destroy()
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app = wx.App(False)
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frm = MyFrame()
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frm.Show()
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app.MainLoop()
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