[PyQt] QDoubleSpinBox & it's precision

[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 



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