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34 lines
1.0 KiB
Python
34 lines
1.0 KiB
Python
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from __future__ import division
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from future.builtins import super
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from PyQt5.QtWidgets import QSlider
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class QDoubleSlider(QSlider):
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def __init__(self, parent, min_value, max_value, step, init_value=None):
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super().__init__(parent)
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self.min_value = min_value
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self.max_value = max_value
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self.step = step
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self.init_value = init_value
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self.nvalues = int((max_value - min_value)/step)
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true_max_value = min_value + step*self.nvalues
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if true_max_value != max_value:
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self.max_value = true_max_value
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self.setMinimum(self.float_2_int(min_value))
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self.setMaximum(self.float_2_int(max_value))
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if init_value is not None:
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self.setValue(self.float_2_int(init_value))
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def int_2_float(self, value):
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return (self.max_value - self.min_value)*value/self.nvalues + \
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self.min_value
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def float_2_int(self, value):
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return int(
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self.nvalues*(value - self.min_value) /
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(self.max_value - self.min_value))
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