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/validator3.py

@@ -0,0 +1,92 @@
+import wx
+import string
+
+about_txt = """\
+The validator used in this example will validate the input on the fly
+instead of waiting until the okay button is pressed.  The first field
+will not allow digits to be typed, the second will allow anything
+and the third will not allow alphabetic characters to be entered.
+"""
+
+
+class CharValidator(wx.PyValidator):
+    def __init__(self, flag):
+         wx.PyValidator.__init__(self)
+         self.flag = flag
+         self.Bind(wx.EVT_CHAR, self.OnChar)
+
+    def Clone(self):
+         """
+         Note that every validator must implement the Clone() method.
+         """
+         return CharValidator(self.flag)
+
+    def Validate(self, win):
+         return True
+
+    def TransferToWindow(self):
+         return True 
+
+    def TransferFromWindow(self):
+         return True
+
+    def OnChar(self, evt):
+         key = chr(evt.GetKeyCode())
+         if self.flag == "no-alpha" and key in string.letters:
+              return
+         if self.flag == "no-digit" and key in string.digits:
+              return
+         evt.Skip()
+
+
+class MyDialog(wx.Dialog):
+    def __init__(self):
+        wx.Dialog.__init__(self, None, -1, "Validators: behavior modification")
+
+        # 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=CharValidator("no-digit"))
+        email_t = wx.TextCtrl(self, validator=CharValidator("any"))
+        phone_t = wx.TextCtrl(self, validator=CharValidator("no-alpha"))
+
+        # 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()