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-09/validator1.py

@@ -0,0 +1,93 @@
+import wx
+
+about_txt = """\
+The validator used in this example will ensure that the text
+controls are not empty when you press the Ok button, and
+will not let you leave if any of the Validations fail."""
+
+
+class NotEmptyValidator(wx.PyValidator):
+     def __init__(self):
+         wx.PyValidator.__init__(self)
+
+     def Clone(self):
+         """
+         Note that every validator must implement the Clone() method.
+         """
+         return NotEmptyValidator()
+
+     def Validate(self, win):
+         textCtrl = self.GetWindow()
+         text = textCtrl.GetValue()
+
+         if len(text) == 0:
+             wx.MessageBox("This field must contain some text!", "Error")
+             textCtrl.SetBackgroundColour("pink")
+             textCtrl.SetFocus()
+             textCtrl.Refresh()
+             return False
+         else:
+             textCtrl.SetBackgroundColour(
+                 wx.SystemSettings_GetColour(wx.SYS_COLOUR_WINDOW))
+             textCtrl.Refresh()
+             return True
+
+     def TransferToWindow(self):
+         return True 
+
+     def TransferFromWindow(self):
+         return True
+
+
+
+class MyDialog(wx.Dialog):
+    def __init__(self):
+        wx.Dialog.__init__(self, None, -1, "Validators: validating")
+
+        # Create the text controls
+        about   = wx.StaticText(self, -1, about_txt)
+        name_l  = wx.StaticText(self, -1, "Name:")
+        email_l = wx.StaticText(self, -1, "Email:")
+        phone_l = wx.StaticText(self, -1, "Phone:")
+        
+        name_t  = wx.TextCtrl(self, validator=NotEmptyValidator())
+        email_t = wx.TextCtrl(self, validator=NotEmptyValidator())
+        phone_t = wx.TextCtrl(self, validator=NotEmptyValidator())
+
+        # Use standard button IDs
+        okay   = wx.Button(self, wx.ID_OK)
+        okay.SetDefault()
+        cancel = wx.Button(self, wx.ID_CANCEL)
+
+        # Layout with sizers
+        sizer = wx.BoxSizer(wx.VERTICAL)
+        sizer.Add(about, 0, wx.ALL, 5)
+        sizer.Add(wx.StaticLine(self), 0, wx.EXPAND|wx.ALL, 5)
+        
+        fgs = wx.FlexGridSizer(3, 2, 5, 5)
+        fgs.Add(name_l, 0, wx.ALIGN_RIGHT)
+        fgs.Add(name_t, 0, wx.EXPAND)
+        fgs.Add(email_l, 0, wx.ALIGN_RIGHT)
+        fgs.Add(email_t, 0, wx.EXPAND)
+        fgs.Add(phone_l, 0, wx.ALIGN_RIGHT)
+        fgs.Add(phone_t, 0, wx.EXPAND)
+        fgs.AddGrowableCol(1)
+        sizer.Add(fgs, 0, wx.EXPAND|wx.ALL, 5)
+
+        btns = wx.StdDialogButtonSizer()
+        btns.AddButton(okay)
+        btns.AddButton(cancel)
+        btns.Realize()
+        sizer.Add(btns, 0, wx.EXPAND|wx.ALL, 5)
+
+        self.SetSizer(sizer)
+        sizer.Fit(self)
+        
+
+app = wx.PySimpleApp()
+
+dlg = MyDialog()
+dlg.ShowModal()
+dlg.Destroy()
+
+app.MainLoop()