2 from wxPython
.wx
import *
3 from wxPython
.lib
.grids
import wxFlexGridSizer
7 #----------------------------------------------------------------------
12 class MyValidator(wxPyValidator
):
13 def __init__(self
, flag
=None, pyVar
=None):
14 wxPyValidator
.__init
__(self
)
16 EVT_CHAR(self
, self
.OnChar
)
19 return MyValidator(self
.flag
)
21 def Validate(self
, win
):
24 if self
.flag
== ALPHA_ONLY
:
26 if x
not in string
.letters
:
29 elif self
.flag
== DIGIT_ONLY
:
31 if x
not in string
.digits
:
37 def OnChar(self
, event
):
39 if key
< WXK_SPACE
or key
== WXK_DELETE
or key
> 255:
42 if self
.flag
== ALPHA_ONLY
and chr(key
) in string
.letters
:
45 if self
.flag
== DIGIT_ONLY
and chr(key
) in string
.digits
:
49 if not wxValidator_IsSilent():
52 # Returning without calling even.Skip eats the event before it
53 # gets to the text control
56 #----------------------------------------------------------------------
58 class TestValidatorPanel(wxPanel
):
59 def __init__(self
, parent
):
60 wxPanel
.__init
__(self
, parent
, -1)
61 self
.SetAutoLayout(true
)
64 fgs
= wxFlexGridSizer(0, 2)
67 fgs
.Add(wxStaticText(self
, -1, "These controls have validators that limit\n"
68 "the type of characters that can be entered."))
70 fgs
.Add(1,VSPACE
); fgs
.Add(1,VSPACE
)
72 label
= wxStaticText(self
, -1, "Alpha Only: ")
73 fgs
.Add(label
, 0, wxALIGN_RIGHT|wxCENTER
)
75 fgs
.Add(wxTextCtrl(self
, -1, "", validator
= MyValidator(ALPHA_ONLY
)))
77 fgs
.Add(1,VSPACE
); fgs
.Add(1,VSPACE
)
79 label
= wxStaticText(self
, -1, "Digits Only: ")
80 fgs
.Add(label
, 0, wxALIGN_RIGHT|wxCENTER
)
81 fgs
.Add(wxTextCtrl(self
, -1, "", validator
= MyValidator(DIGIT_ONLY
)))
83 fgs
.Add(1,VSPACE
); fgs
.Add(1,VSPACE
)
84 fgs
.Add(1,VSPACE
); fgs
.Add(1,VSPACE
)
86 b
= wxButton(self
, -1, "Test Dialog Validation")
87 EVT_BUTTON(self
, b
.GetId(), self
.OnDoDialog
)
91 border
.Add(fgs
, 1, wxGROW|wxALL
, 25)
95 def OnDoDialog(self
, evt
):
96 dlg
= TestValidateDialog(self
)
101 #----------------------------------------------------------------------
103 class TextObjectValidator(wxPyValidator
):
104 """ This validator is used to ensure that the user has entered something
105 into the text object editor dialog's text field.
108 """ Standard constructor.
110 wxPyValidator
.__init
__(self
)
117 Note that every validator must implement the Clone() method.
119 return TextObjectValidator()
122 def Validate(self
, win
):
123 """ Validate the contents of the given text control.
125 textCtrl
= self
.GetWindow()
126 text
= textCtrl
.GetValue()
129 wxMessageBox("A text object must contain some text!", "Error")
136 def TransferToWindow(self
):
137 """ Transfer data from validator to window.
139 The default implementation returns false, indicating that an error
140 occurred. We simply return true, as we don't do any data transfer.
142 return true
# Prevent wxDialog from complaining.
145 def TransferFromWindow(self
):
146 """ Transfer data from window to validator.
148 The default implementation returns false, indicating that an error
149 occurred. We simply return true, as we don't do any data transfer.
151 return true
# Prevent wxDialog from complaining.
153 #----------------------------------------------------------------------
155 class TestValidateDialog(wxDialog
):
156 def __init__(self
, parent
):
157 wxDialog
.__init
__(self
, parent
, -1, "Validated Dialog")
159 self
.SetAutoLayout(true
)
162 fgs
= wxFlexGridSizer(0, 2)
165 fgs
.Add(wxStaticText(self
, -1,
166 "These controls must have text entered into them. Each\n"
167 "one has a validator that is checked when the Okay\n"
168 "button is clicked."))
170 fgs
.Add(1,VSPACE
); fgs
.Add(1,VSPACE
)
172 label
= wxStaticText(self
, -1, "First: ")
173 fgs
.Add(label
, 0, wxALIGN_RIGHT|wxCENTER
)
175 fgs
.Add(wxTextCtrl(self
, -1, "", validator
= TextObjectValidator()))
177 fgs
.Add(1,VSPACE
); fgs
.Add(1,VSPACE
)
179 label
= wxStaticText(self
, -1, "Second: ")
180 fgs
.Add(label
, 0, wxALIGN_RIGHT|wxCENTER
)
181 fgs
.Add(wxTextCtrl(self
, -1, "", validator
= TextObjectValidator()))
184 buttons
= wxBoxSizer(wxHORIZONTAL
)
185 buttons
.Add(wxButton(self
, wxID_OK
, "Okay"), 0, wxALL
, 10)
186 buttons
.Add(wxButton(self
, wxID_CANCEL
, "Cancel"), 0, wxALL
, 10)
188 border
= wxBoxSizer(wxVERTICAL
)
189 border
.Add(fgs
, 1, wxGROW|wxALL
, 25)
191 self
.SetSizer(border
)
196 #----------------------------------------------------------------------
198 def runTest(frame
, nb
, log
):
199 win
= TestValidatorPanel(nb
)
202 #----------------------------------------------------------------------
213 wxValidator is the base class for a family of validator classes that mediate between a class of control, and application data.
215 A validator has three major roles:
217 1. to transfer data from a C++ variable or own storage to and from a control;
219 2. to validate data in a control, and show an appropriate error message;
221 3. to filter events (such as keystrokes), thereby changing the behaviour of the associated control.
223 Validators can be plugged into controls dynamically.