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"""FloatWidget class.
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Represents an unbounded float using a widget.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (c) 2013, the IPython Development Team.
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#
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# Distributed under the terms of the Modified BSD License.
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#
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# The full license is in the file COPYING.txt, distributed with this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from .widget import DOMWidget
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from IPython.utils.traitlets import Unicode, CFloat, Bool, Enum
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#-----------------------------------------------------------------------------
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# Classes
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#-----------------------------------------------------------------------------
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class _FloatWidget(DOMWidget):
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value = CFloat(0.0, help="Float value", sync=True)
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disabled = Bool(False, help="Enable or disable user changes", sync=True)
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description = Unicode(help="Description of the value this widget represents", sync=True)
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class _BoundedFloatWidget(_FloatWidget):
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max = CFloat(100.0, help="Max value", sync=True)
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min = CFloat(0.0, help="Min value", sync=True)
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step = CFloat(0.1, help="Minimum step that the value can take (ignored by some views)", sync=True)
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def __init__(self, *pargs, **kwargs):
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"""Constructor"""
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DOMWidget.__init__(self, *pargs, **kwargs)
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self._validate('value', None, self.value)
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self.on_trait_change(self._validate, ['value', 'min', 'max'])
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def _validate(self, name, old, new):
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"""Validate value, max, min."""
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if self.min > new or new > self.max:
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self.value = min(max(new, self.min), self.max)
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class FloatTextWidget(_FloatWidget):
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_view_name = Unicode('FloatTextView', sync=True)
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class BoundedFloatTextWidget(_BoundedFloatWidget):
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_view_name = Unicode('FloatTextView', sync=True)
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class FloatSliderWidget(_BoundedFloatWidget):
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_view_name = Unicode('FloatSliderView', sync=True)
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orientation = Enum([u'horizontal', u'vertical'], u'horizontal',
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help="Vertical or horizontal.", sync=True)
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readout = Bool(True, help="Display the current value of the slider next to it.", sync=True)
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class FloatProgressWidget(_BoundedFloatWidget):
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_view_name = Unicode('ProgressView', sync=True)
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