wxPython/samples/wxPIA_book/Chapter-09/validator1.py

   1 import wx
   2
   3 about_txt = """\
   4 The validator used in this example will ensure that the text
   5 controls are not empty when you press the Ok button, and
   6 will not let you leave if any of the Validations fail."""
   7
   8
   9 class NotEmptyValidator(wx.PyValidator):
  10      def __init__(self):
  11          wx.PyValidator.__init__(self)
  12
  13      def Clone(self):
  14          """
  15          Note that every validator must implement the Clone() method.
  16          """
  17          return NotEmptyValidator()
  18
  19      def Validate(self, win):
  20          textCtrl = self.GetWindow()
  21          text = textCtrl.GetValue()
  22
  23          if len(text) == 0:
  24              wx.MessageBox("This field must contain some text!", "Error")
  25              textCtrl.SetBackgroundColour("pink")
  26              textCtrl.SetFocus()
  27              textCtrl.Refresh()
  28              return False
  29          else:
  30              textCtrl.SetBackgroundColour(
  31                  wx.SystemSettings_GetColour(wx.SYS_COLOUR_WINDOW))
  32              textCtrl.Refresh()
  33              return True
  34
  35      def TransferToWindow(self):
  36          return True
  37
  38      def TransferFromWindow(self):
  39          return True
  40
  41
  42
  43 class MyDialog(wx.Dialog):
  44     def __init__(self):
  45         wx.Dialog.__init__(self, None, -1, "Validators: validating")
  46
  47         # Create the text controls
  48         about   = wx.StaticText(self, -1, about_txt)
  49         name_l  = wx.StaticText(self, -1, "Name:")
  50         email_l = wx.StaticText(self, -1, "Email:")
  51         phone_l = wx.StaticText(self, -1, "Phone:")
  52
  53         name_t  = wx.TextCtrl(self, validator=NotEmptyValidator())
  54         email_t = wx.TextCtrl(self, validator=NotEmptyValidator())
  55         phone_t = wx.TextCtrl(self, validator=NotEmptyValidator())
  56
  57         # Use standard button IDs
  58         okay   = wx.Button(self, wx.ID_OK)
  59         okay.SetDefault()
  60         cancel = wx.Button(self, wx.ID_CANCEL)
  61
  62         # Layout with sizers
  63         sizer = wx.BoxSizer(wx.VERTICAL)
  64         sizer.Add(about, 0, wx.ALL, 5)
  65         sizer.Add(wx.StaticLine(self), 0, wx.EXPAND|wx.ALL, 5)
  66
  67         fgs = wx.FlexGridSizer(3, 2, 5, 5)
  68         fgs.Add(name_l, 0, wx.ALIGN_RIGHT)
  69         fgs.Add(name_t, 0, wx.EXPAND)
  70         fgs.Add(email_l, 0, wx.ALIGN_RIGHT)
  71         fgs.Add(email_t, 0, wx.EXPAND)
  72         fgs.Add(phone_l, 0, wx.ALIGN_RIGHT)
  73         fgs.Add(phone_t, 0, wx.EXPAND)
  74         fgs.AddGrowableCol(1)
  75         sizer.Add(fgs, 0, wx.EXPAND|wx.ALL, 5)
  76
  77         btns = wx.StdDialogButtonSizer()
  78         btns.AddButton(okay)
  79         btns.AddButton(cancel)
  80         btns.Realize()
  81         sizer.Add(btns, 0, wx.EXPAND|wx.ALL, 5)
  82
  83         self.SetSizer(sizer)
  84         sizer.Fit(self)
  85
  86
  87 app = wx.PySimpleApp()
  88
  89 dlg = MyDialog()
  90 dlg.ShowModal()
  91 dlg.Destroy()
  92
  93 app.MainLoop()