wxPython/samples/wxPIA_book/Chapter-09/validator3.py

   1 import wx
   2 import string
   3
   4 about_txt = """\
   5 The validator used in this example will validate the input on the fly
   6 instead of waiting until the okay button is pressed.  The first field
   7 will not allow digits to be typed, the second will allow anything
   8 and the third will not allow alphabetic characters to be entered.
   9 """
  10
  11
  12 class CharValidator(wx.PyValidator):
  13     def __init__(self, flag):
  14          wx.PyValidator.__init__(self)
  15          self.flag = flag
  16          self.Bind(wx.EVT_CHAR, self.OnChar)
  17
  18     def Clone(self):
  19          """
  20          Note that every validator must implement the Clone() method.
  21          """
  22          return CharValidator(self.flag)
  23
  24     def Validate(self, win):
  25          return True
  26
  27     def TransferToWindow(self):
  28          return True
  29
  30     def TransferFromWindow(self):
  31          return True
  32
  33     def OnChar(self, evt):
  34          key = chr(evt.GetKeyCode())
  35          if self.flag == "no-alpha" and key in string.letters:
  36               return
  37          if self.flag == "no-digit" and key in string.digits:
  38               return
  39          evt.Skip()
  40
  41
  42 class MyDialog(wx.Dialog):
  43     def __init__(self):
  44         wx.Dialog.__init__(self, None, -1, "Validators: behavior modification")
  45
  46         # Create the text controls
  47         about   = wx.StaticText(self, -1, about_txt)
  48         name_l  = wx.StaticText(self, -1, "Name:")
  49         email_l = wx.StaticText(self, -1, "Email:")
  50         phone_l = wx.StaticText(self, -1, "Phone:")
  51
  52         name_t  = wx.TextCtrl(self, validator=CharValidator("no-digit"))
  53         email_t = wx.TextCtrl(self, validator=CharValidator("any"))
  54         phone_t = wx.TextCtrl(self, validator=CharValidator("no-alpha"))
  55
  56         # Use standard button IDs
  57         okay   = wx.Button(self, wx.ID_OK)
  58         okay.SetDefault()
  59         cancel = wx.Button(self, wx.ID_CANCEL)
  60
  61         # Layout with sizers
  62         sizer = wx.BoxSizer(wx.VERTICAL)
  63         sizer.Add(about, 0, wx.ALL, 5)
  64         sizer.Add(wx.StaticLine(self), 0, wx.EXPAND|wx.ALL, 5)
  65
  66         fgs = wx.FlexGridSizer(3, 2, 5, 5)
  67         fgs.Add(name_l, 0, wx.ALIGN_RIGHT)
  68         fgs.Add(name_t, 0, wx.EXPAND)
  69         fgs.Add(email_l, 0, wx.ALIGN_RIGHT)
  70         fgs.Add(email_t, 0, wx.EXPAND)
  71         fgs.Add(phone_l, 0, wx.ALIGN_RIGHT)
  72         fgs.Add(phone_t, 0, wx.EXPAND)
  73         fgs.AddGrowableCol(1)
  74         sizer.Add(fgs, 0, wx.EXPAND|wx.ALL, 5)
  75
  76         btns = wx.StdDialogButtonSizer()
  77         btns.AddButton(okay)
  78         btns.AddButton(cancel)
  79         btns.Realize()
  80         sizer.Add(btns, 0, wx.EXPAND|wx.ALL, 5)
  81
  82         self.SetSizer(sizer)
  83         sizer.Fit(self)
  84
  85
  86 app = wx.PySimpleApp()
  87
  88 dlg = MyDialog()
  89 dlg.ShowModal()
  90 dlg.Destroy()
  91
  92 app.MainLoop()