[PyQt] QDoubleSpinBox & it's precision

[Hans-Peter Jansen]

Am Freitag 09 Oktober 2009 schrieb Prashant Saxena:
> Hi,
>
> This is regarding the precision in "QDoubleSpinBox". With out sub
> classing things were not working as I expected.
>
>
> class QxDoubleSpinBox(QtGui.QDoubleSpinBox):
>     def __init__(self, parent=None, value=0.):
>         QtGui.QDoubleSpinBox.__init__(self, parent)
>         self.setRange(0., 1.)
>         self.setValue(0.421)
>         self.setSingleStep(0.001)
>         self.setFixedWidth(70)
>         self.setWrapping(True)
>         self.setDecimals(3)
>
>     def valueFromText(self, str):
>         return FixedPoint(str, 3)
>
>     def textFromValue(self, value):
>         print "textFromValue = ", value
>         return str(value)
>
>
> As soon as I start the application, here are the results printed:
>
>
> textFromValue =  0.42
> textFromValue =  0.42
> textFromValue =  0.42
> textFromValue =  0.0
> textFromValue =  1.0
> textFromValue =  0.42
> textFromValue =  0.42
>
>
> I have no idea what's going on here and why "textFromValue" is getting
> called so many times with values getting changed each time. I was hoping
> that sub classing will solve the problem of precision.
>
> How do I solve this?
>
> Prashant
>
> qt-sdk-win-opensource-2009.03.1.exe
> Python 2.6.3
> PyQt-Py2.6-gpl-4.6-1
> Win XP, 32 Bit
>

Prashant, both issues are missing an self-contained example, and while at 
it, is it possible for you to send plain text mails? 

Pete