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-07/button.py

@@ -0,0 +1,21 @@
+import wx
+
+class ButtonFrame(wx.Frame):
+    def __init__(self):
+        wx.Frame.__init__(self, None, -1, 'Button Example', 
+                size=(300, 100))
+        panel = wx.Panel(self, -1)
+        self.button = wx.Button(panel, -1, "Hello", pos=(50, 20))
+        self.Bind(wx.EVT_BUTTON, self.OnClick, self.button)
+        self.button.SetDefault()
+
+    def OnClick(self, event):
+        self.button.SetLabel("Clicked")
+        
+if __name__ == '__main__':
+    app = wx.PySimpleApp()
+    frame = ButtonFrame()
+    frame.Show()
+    app.MainLoop()
+
+