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import string
import wx
#----------------------------------------------------------------------
ALPHA_ONLY = 1
DIGIT_ONLY = 2
class MyValidator(wx.PyValidator):
def __init__(self, flag=None, pyVar=None):
wx.PyValidator.__init__(self)
self.flag = flag
self.Bind(wx.EVT_CHAR, self.OnChar)
def Clone(self):
return MyValidator(self.flag)
def Validate(self, win):
tc = self.GetWindow()
val = tc.GetValue()
if self.flag == ALPHA_ONLY:
for x in val:
if x not in string.letters:
return False
elif self.flag == DIGIT_ONLY:
for x in val:
if x not in string.digits:
return False
return True
def OnChar(self, event):
key = event.GetKeyCode()
if key < wx.WXK_SPACE or key == wx.WXK_DELETE or key > 255:
event.Skip()
return
if self.flag == ALPHA_ONLY and chr(key) in string.letters:
event.Skip()
return
if self.flag == DIGIT_ONLY and chr(key) in string.digits:
event.Skip()
return
if not wx.Validator_IsSilent():
wx.Bell()
# Returning without calling even.Skip eats the event before it
# gets to the text control
return
#----------------------------------------------------------------------
class TestValidatorPanel(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent, -1)
self.SetAutoLayout(True)
VSPACE = 10
fgs = wx.FlexGridSizer(cols=2)
fgs.Add((1,1))
fgs.Add(wx.StaticText(self, -1, "These controls have validators that limit\n"
"the type of characters that can be entered."))
fgs.Add((1,VSPACE)); fgs.Add((1,VSPACE))
label = wx.StaticText(self, -1, "Alpha Only: ")
fgs.Add(label, 0, wx.ALIGN_RIGHT|wx.CENTER)
fgs.Add(wx.TextCtrl(self, -1, "", validator = MyValidator(ALPHA_ONLY)))
fgs.Add((1,VSPACE)); fgs.Add((1,VSPACE))
label = wx.StaticText(self, -1, "Digits Only: ")
fgs.Add(label, 0, wx.ALIGN_RIGHT|wx.CENTER)
fgs.Add(wx.TextCtrl(self, -1, "", validator = MyValidator(DIGIT_ONLY)))
fgs.Add((1,VSPACE)); fgs.Add((1,VSPACE))
fgs.Add((1,VSPACE)); fgs.Add((1,VSPACE))
fgs.Add((0,0))
b = wx.Button(self, -1, "Test Dialog Validation")
self.Bind(wx.EVT_BUTTON, self.OnDoDialog, b)
fgs.Add(b)
border = wx.BoxSizer()
border.Add(fgs, 1, wx.GROW|wx.ALL, 25)
self.SetSizer(border)
self.Layout()
def OnDoDialog(self, evt):
dlg = TestValidateDialog(self)
dlg.ShowModal()
dlg.Destroy()
#----------------------------------------------------------------------
class TextObjectValidator(wx.PyValidator):
""" This validator is used to ensure that the user has entered something
into the text object editor dialog's text field.
"""
def __init__(self):
""" Standard constructor.
"""
wx.PyValidator.__init__(self)
def Clone(self):
""" Standard cloner.
Note that every validator must implement the Clone() method.
"""
return TextObjectValidator()
def Validate(self, win):
""" Validate the contents of the given text control.
"""
textCtrl = self.GetWindow()
text = textCtrl.GetValue()
if len(text) == 0:
wx.MessageBox("A text object 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):
""" Transfer data from validator to window.
The default implementation returns False, indicating that an error
occurred. We simply return True, as we don't do any data transfer.
"""
return True # Prevent wxDialog from complaining.
def TransferFromWindow(self):
""" Transfer data from window to validator.
The default implementation returns False, indicating that an error
occurred. We simply return True, as we don't do any data transfer.
"""
return True # Prevent wxDialog from complaining.
#----------------------------------------------------------------------
class TestValidateDialog(wx.Dialog):
def __init__(self, parent):
wx.Dialog.__init__(self, parent, -1, "Validated Dialog")
self.SetAutoLayout(True)
VSPACE = 10
fgs = wx.FlexGridSizer(cols=2)
fgs.Add((1,1));
fgs.Add(wx.StaticText(self, -1,
"These controls must have text entered into them. Each\n"
"one has a validator that is checked when the Ok\n"
"button is clicked."))
fgs.Add((1,VSPACE)); fgs.Add((1,VSPACE))
label = wx.StaticText(self, -1, "First: ")
fgs.Add(label, 0, wx.ALIGN_RIGHT|wx.CENTER)
fgs.Add(wx.TextCtrl(self, -1, "", validator = TextObjectValidator()))
fgs.Add((1,VSPACE)); fgs.Add((1,VSPACE))
label = wx.StaticText(self, -1, "Second: ")
fgs.Add(label, 0, wx.ALIGN_RIGHT|wx.CENTER)
fgs.Add(wx.TextCtrl(self, -1, "", validator = TextObjectValidator()))
buttons = wx.StdDialogButtonSizer() #wx.BoxSizer(wx.HORIZONTAL)
b = wx.Button(self, wx.ID_OK, "OK")
b.SetDefault()
buttons.AddButton(b)
buttons.AddButton(wx.Button(self, wx.ID_CANCEL, "Cancel"))
buttons.Realize()
border = wx.BoxSizer(wx.VERTICAL)
border.Add(fgs, 1, wx.GROW|wx.ALL, 25)
border.Add(buttons, 0, wx.GROW|wx.BOTTOM, 5)
self.SetSizer(border)
border.Fit(self)
self.Layout()
#----------------------------------------------------------------------
def runTest(frame, nb, log):
win = TestValidatorPanel(nb)
return win
#----------------------------------------------------------------------
overview = """\
<html>
<body>
wx.Validator is the base class for a family of validator classes that mediate
between a class of control, and application data.
<p>A validator has three major roles:
<p><ol>
<li>to transfer data from a C++ variable or own storage to and from a control;
<li>to validate data in a control, and show an appropriate error message;
<li>to filter events (such as keystrokes), thereby changing the behaviour of the associated control.
</ol>
<p>Validators can be plugged into controls dynamically.
</body>
</html>
"""
if __name__ == '__main__':
import sys,os
import run
run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
|
