import wx

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1,
                          "Add Menu Items")
        p = wx.Panel(self)
        self.txt = wx.TextCtrl(p, -1, "new item")
        btn = wx.Button(p, -1, "Add Menu Item")
        self.Bind(wx.EVT_BUTTON, self.OnAddItem, btn)

        sizer = wx.BoxSizer(wx.HORIZONTAL)
        sizer.Add(self.txt, 0, wx.ALL, 20)
        sizer.Add(btn, 0, wx.TOP|wx.RIGHT, 20)
        p.SetSizer(sizer)
        
        self.menu = menu = wx.Menu()
        simple = menu.Append(-1, "Simple menu item")
        menu.AppendSeparator()
        exit = menu.Append(-1, "Exit")
        self.Bind(wx.EVT_MENU, self.OnSimple, simple)
        self.Bind(wx.EVT_MENU, self.OnExit, exit)
                   
        menuBar = wx.MenuBar()
        menuBar.Append(menu, "Menu")
        self.SetMenuBar(menuBar)

       
    def OnSimple(self, event):
        wx.MessageBox("You selected the simple menu item")

    def OnExit(self, event):
        self.Close()

    def OnAddItem(self, event):
        item = self.menu.Append(-1, self.txt.GetValue())
        self.Bind(wx.EVT_MENU, self.OnNewItemSelected, item)

    def OnNewItemSelected(self, event):
        wx.MessageBox("You selected a new item")
        
    

if __name__ == "__main__":
    app = wx.PySimpleApp()
    frame = MyFrame()
    frame.Show()
    app.MainLoop()