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-08/mdi.py

@@ -0,0 +1,29 @@
+import wx
+
+class MDIFrame(wx.MDIParentFrame):
+    def __init__(self):
+        wx.MDIParentFrame.__init__(self, None, -1, "MDI Parent", 
+                size=(600,400))
+        menu = wx.Menu()
+        menu.Append(5000, "&New Window")
+        menu.Append(5001, "E&xit")
+        menubar = wx.MenuBar()
+        menubar.Append(menu, "&File")
+        self.SetMenuBar(menubar)
+        self.Bind(wx.EVT_MENU, self.OnNewWindow, id=5000)
+        self.Bind(wx.EVT_MENU, self.OnExit, id=5001)
+
+    def OnExit(self, evt):
+        self.Close(True)
+
+    def OnNewWindow(self, evt):
+        win = wx.MDIChildFrame(self, -1, "Child Window")
+        win.Show(True)
+
+if __name__ == '__main__':
+    app = wx.PySimpleApp()
+    frame = MDIFrame()
+    frame.Show()
+    app.MainLoop()
+        
+