Stub of a simple wxpython clipboard manager

gistfile1.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
import wx

TASKBAR_ICON = "icon.png"

class ClipmanIcon(wx.TaskBarIcon):
    def __init__(self):
        wx.TaskBarIcon.__init__(self)
        self.icon = wx.IconFromBitmap( wx.Bitmap(TASKBAR_ICON) )
        self.UpdateIcon()
        self.Bind(wx.EVT_TASKBAR_LEFT_DOWN, self.OnLMBDown)

        self.Timer = wx.Timer(self)
        self.Timer.Start(100)
        self.Bind(wx.EVT_TIMER, self.OnTimer, self.Timer)

        self.RecentHistory = [ ]

    def CreatePopupMenu(self):
        menu = wx.Menu()
        item_exit  = menu.Append(wx.ID_EXIT, 'Exit', 'Exit!')
        menu.Bind(wx.EVT_MENU, self.OnExit, item_exit)
        return menu

    def OnTimer(self, event):
        wx.TheClipboard.Open()
        data_object = wx.TextDataObject()
        success = wx.TheClipboard.GetData(data_object)
        wx.TheClipboard.Close()

        if not success: return None

        text = data_object.Text

        if text not in self.RecentHistory:
            self.RecentHistory += [text]
        elif text != self.RecentHistory[-1]:
            index = self.RecentHistory.index(text)
            del self.RecentHistory[ index ]
            self.RecentHistory += [text]

    def ChooseItem(self, index):
        print index

    def CreateHistoryMenu(self):
        menu = wx.Menu()

        for i, h_item in enumerate(self.RecentHistory):
            if i == 0: item_id = wx.ID_FORWARD
            else:      item_id = wx.ID_ANY

            item = menu.Append(item_id, h_item)
            func = lambda e: self.ChooseItem(i)

            menu.Bind(wx.EVT_MENU, func, item)

        menu.AppendSeparator()
        clear = menu.Append(wx.ID_CLEAR, "Clear")
        menu.Bind(wx.EVT_MENU, self.ClearRecent, clear)

        return menu

    def ClearRecent(self, event):
        self.RecentHistory = []
        self.OnTimer(None)

    def OnExit(self, event):
        self.Timer.Destroy()
        wx.CallAfter(self.Destroy)

    def UpdateIcon(self):
        self.SetIcon(self.icon, "Derpo derpo")

    def OnLMBDown(self, event):
        self.PopupMenu(self.CreateHistoryMenu())

class ClipmanApp(wx.App):
    def __init__(self):
        wx.App.__init__(self, False)
        icon = ClipmanIcon()

try:
    app = ClipmanApp()
    app.MainLoop()
except KeyboardInterrupt:
    app.Destroy()