wxPython/demo/wxValidator.py

   1
   2 from wxPython.wx        import *
   3 from wxPython.lib.grids import wxFlexGridSizer
   4
   5 import string
   6
   7 #----------------------------------------------------------------------
   8
   9 ALPHA_ONLY = 1
  10 DIGIT_ONLY = 2
  11
  12 class MyValidator(wxPyValidator):
  13     def __init__(self, flag=None, pyVar=None):
  14         wxPyValidator.__init__(self)
  15         self.flag = flag
  16         EVT_CHAR(self, self.OnChar)
  17
  18     def Clone(self):
  19         return MyValidator(self.flag)
  20
  21     def Validate(self, win):
  22         print 'validate'
  23         tc = wxPyTypeCast(win, "wxTextCtrl")
  24         val = tc.GetValue()
  25         if self.flag == ALPHA_ONLY:
  26             for x in val:
  27                 if x not in string.letters:
  28                     return false
  29
  30         elif self.flag == DIGIT_ONLY:
  31             for x in val:
  32                 if x not in string.digits:
  33                     return false
  34
  35         return true
  36
  37
  38     def OnChar(self, event):
  39         key = event.KeyCode()
  40         if key < WXK_SPACE or key == WXK_DELETE or key > 255:
  41             event.Skip()
  42             return
  43         if self.flag == ALPHA_ONLY and chr(key) in string.letters:
  44             event.Skip()
  45             return
  46         if self.flag == DIGIT_ONLY and chr(key) in string.digits:
  47             event.Skip()
  48             return
  49
  50         if not wxValidator_IsSilent():
  51             wxBell()
  52
  53         # Returning without calling even.Skip eats the event before it
  54         # gets to the text control
  55         return
  56
  57 #----------------------------------------------------------------------
  58
  59 class TestValidatorPanel(wxPanel):
  60     def __init__(self, parent):
  61         wxPanel.__init__(self, parent, -1)
  62         self.SetAutoLayout(true)
  63         VSPACE = 10
  64
  65         fgs = wxFlexGridSizer(0, 2)
  66
  67         fgs.Add(1,1);
  68         fgs.Add(wxStaticText(self, -1, "These controls have validators that limit\n"
  69                              "the type of characters that can be entered."))
  70
  71         fgs.Add(1,VSPACE); fgs.Add(1,VSPACE)
  72
  73         label = wxStaticText(self, -1, "Alpha Only: ")
  74         fgs.Add(label, 0, wxALIGN_RIGHT|wxCENTER)
  75
  76         fgs.Add(wxTextCtrl(self, -1, "", validator = MyValidator(ALPHA_ONLY)))
  77
  78         fgs.Add(1,VSPACE); fgs.Add(1,VSPACE)
  79
  80         label = wxStaticText(self, -1, "Digits Only: ")
  81         fgs.Add(label, 0, wxALIGN_RIGHT|wxCENTER)
  82         fgs.Add(wxTextCtrl(self, -1, "", validator = MyValidator(DIGIT_ONLY)))
  83
  84         border = wxBoxSizer()
  85         border.Add(fgs, 1, wxGROW|wxALL, 25)
  86         self.SetSizer(border)
  87         self.Layout()
  88
  89
  90 #----------------------------------------------------------------------
  91
  92 def runTest(frame, nb, log):
  93     win = TestValidatorPanel(nb)
  94     return win
  95
  96 #----------------------------------------------------------------------
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106 overview = """\
 107 wxValidator is the base class for a family of validator classes that mediate between a class of control, and application data.
 108
 109 A validator has three major roles:
 110
 111 1. to transfer data from a C++ variable or own storage to and from a control;
 112
 113 2. to validate data in a control, and show an appropriate error message;
 114
 115 3. to filter events (such as keystrokes), thereby changing the behaviour of the associated control.
 116
 117 Validators can be plugged into controls dynamically.
 118
 119 """