def setSingleStep(self, stepSize):
        self.floatStepSize = float(stepSize)
        self.numSteps = int((self.floatMaxVal - self.floatMinVal)/self.floatStepSize)
        QtGui.QSlider.setRange(self, 0, self.numSteps)

        
###############################################################################
stepSize tells the step between values. We need to calculate the
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/gui/mashups/mashups_widgets.py/QSliderWidget.setSingleStep