Python论坛的帖子：

Sat Apr 9 07:29:31 HKT 2005

class Main_Window(wx.Dialog):
    def __init__(self, parent, id, title):
        wx.Dialog.__init__(self, parent, -1,
style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER)
        self.init_ctrl()

    def init_ctrl(self):
parent=self, pos=wx.Point(88, 32),size=wx.Size(440, 22))
        self.Button = wx.Button(parent=self, id=wx.ID_OK, name="Ok",
pos = wx.Point(2, 250))
        self.Button.Bind(wx.EVT_BUTTON, self.OnClick)
        self.Tree = wx.TreeCtrl(id=103, parent = self, size=wx.Size(150, 200))
        self.Tree.Bind(wx.EVT_TREE_SEL_CHANGING, self.TreeSelChanging)
        self.Tree.Bind(wx.EVT_TREE_SEL_CHANGED, self.TreeSelChanged)
        ItemId = self.Tree.AddRoot('Root')
        self.Item1 = self.Tree.AppendItem(ItemId, 'Item 1')
    def TreeSelChanging(self, event):
        print 1
    def TreeSelChanged(self, event):
        print 2
    def OnClick(self, event):
        self.Tree.SelectItem(self.Item1)

class MyApp(wx.App):
    def OnInit(self):
        frame = Main_Window(None, -1, 'Noname')
        self.SetTopWindow(frame)
        frame.ShowModal()
        frame.Destroy()
        return True

app = MyApp(0)
app.MainLoop()

结果是
1
1
2
2

TreeSelChanging()和TreeSelChanged()被调用了两次。BUG吗？

标题：[python-chinese] BUG? 在wxPython中wx.TreeCtrl的SelectItem()会产生两次EVT_TREE_SEL_CHANGING和EVT_TREE_SEL_CHANGED事件