forked from IPKM/nmreval
46 lines
1.1 KiB
Python
46 lines
1.1 KiB
Python
from math import inf
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from ..Qt import QtWidgets, QtGui
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class SciSpinBox(QtWidgets.QDoubleSpinBox):
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def __init__(self, parent=None):
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super().__init__(parent=parent)
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self.validator = QtGui.QDoubleValidator(self)
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self.setMinimum(-inf)
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self.setMaximum(inf)
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self.setDecimals(1000)
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self.precision = 0.001
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self._prev_value = float(self.lineEdit().text())
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def valueFromText(self, text: str) -> float:
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try:
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self._prev_value = float(self.cleanText())
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except ValueError:
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pass
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return self._prev_value
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def textFromValue(self, value: float) -> str:
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if value == 0:
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return '0'
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else:
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return f'{value:.3e}'
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def stepBy(self, step: int):
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self._prev_value = self.value()
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new_value = self._prev_value
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if new_value != 0.0:
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new_value *= 10**(step/19.)
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else:
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new_value = 0.001
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self.setValue(new_value)
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self.lineEdit().setText(f'{new_value:.3e}')
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def validate(self, text, pos):
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return self.validator.validate(text, pos)
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