Added the sample code from wxPython In Action to the samples dir

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42925 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/samples/wxPIA_book/Chapter-10/sub_menu.py

@@ -0,0 +1,34 @@
+import wx
+
+class MyFrame(wx.Frame):
+    def __init__(self):
+        wx.Frame.__init__(self, None, -1,
+                          "Sub-menu Example")
+        p = wx.Panel(self)
+        menu = wx.Menu()
+
+        submenu = wx.Menu()
+        submenu.Append(-1, "Sub-item 1")
+        submenu.Append(-1, "Sub-item 2")
+        menu.AppendMenu(-1, "Sub-menu", submenu)
+        
+        menu.AppendSeparator()
+        exit = menu.Append(-1, "Exit")
+        self.Bind(wx.EVT_MENU, self.OnExit, exit)
+                  
+        menuBar = wx.MenuBar()
+        menuBar.Append(menu, "Menu")
+        self.SetMenuBar(menuBar)
+        
+
+    def OnExit(self, event):
+        self.Close()
+        
+
+if __name__ == "__main__":
+    app = wx.PySimpleApp()
+    frame = MyFrame()
+    frame.Show()
+    app.MainLoop()
+
+