[PyQt] QValidator fixup issue

[Kerri Reno]

Got a response to this on stackoverflow - thanks!

http://stackoverflow.com/questions/34055174/qvalidator-fixup-issue

On Wed, Dec 2, 2015 at 4:27 PM, Kerri Reno <kreno at yumaed.org> wrote:

> Good afternoon,
>
> Following is my code to validate an account code, and add dashes at
> certain intervals.  An example account code is 140-100-1000-6610-543.
>  The code takes the regex: \d{3}-\d{3}-\d{4}-\d{4}-\d{3] and allows the
> user to type in numbers, and where there is a dash in the regex, it places
> the dash for the user.  Or rather, it should.  On our production server
> (('Qt version:', '4.8.1'), ('SIP version:', '4.13.2'), ('PyQt version:',
> '4.9.1')) it does work. Our dev server is upgraded to ('Qt version:',
> '4.8.6'),  ('SIP version:', '4.15.5'), ('PyQt version:', '4.10.4') and it
> doesn't work there.
>
> On each server, I type in 140.  On the production (older version), the
> line edit value changes to 140-.  On the newer version development server,
> it does not add the dash.
>
> Please let me know if you see my issue, and let me know if this is a PyQT
> issue, or a QT issue.
>
> Thanks in advance!
> Kerri
>
> CODE:
>
> #!/usr/bin/env python
> # vim:set ts=4:set ff=unix
> import sys
> from PyQt4 import QtGui, QtCore
>
> DEBUG = True
>
> class acValidator(QtGui.QRegExpValidator):
>
>         def __init__(self, regexp, widget):
>                 QtGui.QRegExpValidator.__init__(self, regexp, widget)
>                 self.widget = widget
>
>         def validate(self, text, pos):
>                 '''function to decide if this account code is valid'''
>                 valid, _npos = QtGui.QRegExpValidator.validate(self, text,
> pos)
>
>                 if valid != QtGui.QValidator.Acceptable:
>                         self.fixup(text)
>                         print 'acWidget.validate result of fixup', text
>
>                         # move position to the end, if fixup just added a
> dash
>                         # to the end
>                         newstr = self.widget.text()
>                         newpos = len(str(newstr))
>                         if pos + 1 == newpos and newstr[pos:newpos] == '-':
>                                 pos = newpos
>
>                 # return the valid variable, and the current position
>                 return (valid, pos)
>
>         def fixup(self, text):
>                 '''place dashes, if we can'''
>                 # pylint: disable=no-member
>                 if DEBUG:
>                         print 'acWidget.py fixup'
>                 reParts = self.regExp().pattern().split('-')
>                 if DEBUG:
>                         print list(reParts)
>                 newreg = ''
>                 for i in range(len(reParts)):
>                         newreg += reParts[i]
>                         if DEBUG:
>                                 print i, reParts[i]
>
>                         nr = QtCore.QRegExp(newreg)
>                         # pylint: disable=no-member
>                         if nr.exactMatch(text) and not
> self.regExp().exactMatch(text):
>                                 if DEBUG:
>                                         print 'adding dash'
>                                 text += '-'
>                                 return
>
>                         newreg += '-'
>
>         def isValid(self):
>                 '''return a true or false for the validity based on
> whether the
>                 widget is a lineEdit or a comboBox (acCB).  true only if
> the
>                 validator returns QtGui.QValidator.Acceptable
>                 '''
>                 valid, _npos = QtGui.QRegExpValidator.validate(self,
>                                                 self.widget.text(),
>
> self.widget.cursorPosition())
>                 if valid == QtGui.QValidator.Acceptable:
>                         return True
>
>                 return False
>
>
> class acWidget(QtGui.QLineEdit):
>
>         def __init__(self, parent=None):
>                 QtGui.QLineEdit.__init__(self, parent)
>
>                 self.regex = r'\d{3}-\d{3}-\d{4}-\d{4}-\d{3}'
>                 self.setMinimumWidth(200)
>                 self.setValidator(acValidator(QtCore.QRegExp(self.regex),
>                                         self))
>
> if __name__ == '__main__':
>
>         app = QtGui.QApplication(sys.argv)
>         form = QtGui.QDialog()
>         layout = QtGui.QVBoxLayout(form)
>         a = acWidget(form)
>         layout.addWidget(a)
>         form.setLayout(layout)
>         form.setMinimumWidth(400)
>         form.setMinimumHeight(200)
>         form.show()
>         app.exec_()
>
>
>
> --
> .·:*¨¨*:·.   .·:*¨¨*:·.   .·:*¨¨*:·.
> Yuma Educational Computer Consortium
> Compass Development Team
> Kerri Reno
> kreno at yumaed.org      (928) 502-4240
> .·:*¨¨*:·.   .·:*¨¨*:·.   .·:*¨¨*:·.
> I'm so busy I don't know if I found a rope or lost a horse!
>



-- 
Please send problems and questions to compass at yumaed.org
<cases at yuhsd.fogbugz.com>
If you have an emergency, and can't reach me, please call the help desk at
928-502-4202.
.·:*¨¨*:·.   .·:*¨¨*:·.   .·:*¨¨*:·.
Yuma Educational Computer Consortium
Compass Development Team
Kerri Reno
kreno at yumaed.org      (928) 502-4240
.·:*¨¨*:·.   .·:*¨¨*:·.   .·:*¨¨*:·.
I'm so busy I don't know if I found a rope or lost a horse!
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