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July 9, 2014 16:19
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IntRangeWidget with tuple and scalar traits
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| """IntWidget class. | |
| Represents an unbounded int using a widget. | |
| """ | |
| #----------------------------------------------------------------------------- | |
| # Copyright (c) 2013, the IPython Development Team. | |
| # | |
| # Distributed under the terms of the Modified BSD License. | |
| # | |
| # The full license is in the file COPYING.txt, distributed with this software. | |
| #----------------------------------------------------------------------------- | |
| #----------------------------------------------------------------------------- | |
| # Imports | |
| #----------------------------------------------------------------------------- | |
| from .widget import DOMWidget | |
| from IPython.utils.traitlets import Unicode, CInt, Bool, Enum, Tuple, link | |
| #----------------------------------------------------------------------------- | |
| # Classes | |
| #----------------------------------------------------------------------------- | |
| class _IntWidget(DOMWidget): | |
| value = CInt(0, help="Int value", sync=True) | |
| disabled = Bool(False, help="Enable or disable user changes", sync=True) | |
| description = Unicode(help="Description of the value this widget represents", sync=True) | |
| class _BoundedIntWidget(_IntWidget): | |
| step = CInt(1, help="Minimum step that the value can take (ignored by some views)", sync=True) | |
| max = CInt(100, help="Max value", sync=True) | |
| min = CInt(0, help="Min value", sync=True) | |
| def __init__(self, *pargs, **kwargs): | |
| """Constructor""" | |
| DOMWidget.__init__(self, *pargs, **kwargs) | |
| self.on_trait_change(self._validate, ['value', 'min', 'max']) | |
| def _validate(self, name, old, new): | |
| """Validate value, max, min.""" | |
| if self.min > new or new > self.max: | |
| self.value = min(max(new, self.min), self.max) | |
| class IntTextWidget(_IntWidget): | |
| _view_name = Unicode('IntTextView', sync=True) | |
| class BoundedIntTextWidget(_BoundedIntWidget): | |
| _view_name = Unicode('IntTextView', sync=True) | |
| class IntSliderWidget(_BoundedIntWidget): | |
| _view_name = Unicode('IntSliderView', sync=True) | |
| orientation = Enum([u'horizontal', u'vertical'], u'horizontal', | |
| help="Vertical or horizontal.", sync=True) | |
| range = Bool(False, help="Display a range selector", sync=True) | |
| readout = Bool(True, help="Display the current value of the slider next to it.", sync=True) | |
| class IntProgressWidget(_BoundedIntWidget): | |
| _view_name = Unicode('ProgressView', sync=True) | |
| class _IntRangeWidget(_IntWidget): | |
| value = Tuple(CInt, CInt, default_value=(0, 1), help="Low and high int values", sync=True) | |
| lower = CInt(0, help="Lower bound") | |
| upper = CInt(1, help="Upper bound") | |
| def __init__(self, *pargs, **kwargs): | |
| if set(['value', 'lower']) <= set(kwargs) or set(['value', 'upper']) <= set(kwargs): | |
| raise ValueError("Cannot specify both value and (lower, upper) for IntRange") | |
| DOMWidget.__init__(self, *pargs, **kwargs) | |
| def make_closure(targetobj, targetattr, src_pos=None, dest_pos=None): | |
| def update(name, old, new): | |
| if src_pos is None: | |
| value = new | |
| else: | |
| value = new[src_pos] | |
| if dest_pos is None: | |
| setattr(targetobj, targetattr, value) | |
| else: | |
| targetvalue = list(getattr(targetobj, targetattr)) | |
| targetvalue[dest_pos] = value | |
| setattr(targetobj, targetattr, tuple(targetvalue)) | |
| return update | |
| if 'value' in kwargs: | |
| self.lower, self.upper = self.value | |
| elif 'lower' in kwargs or 'upper' in kwargs: | |
| self.value = self.lower, self.upper | |
| self.on_trait_change(make_closure(self, 'value', dest_pos=0), 'lower') | |
| self.on_trait_change(make_closure(self, 'value', dest_pos=1), 'upper') | |
| self.on_trait_change(make_closure(self, 'lower', src_pos=0), 'value') | |
| self.on_trait_change(make_closure(self, 'upper', src_pos=1), 'value') | |
| class _BoundedIntRangeWidget(_IntRangeWidget): | |
| step = CInt(1, help="Minimum step that the value can take (ignored by some views)", sync=True) | |
| max = CInt(100, help="Max value", sync=True) | |
| min = CInt(0, help="Min value", sync=True) | |
| def __init__(self, *pargs, **kwargs): | |
| """Constructor""" | |
| _IntRangeWidget.__init__(self, *pargs, **kwargs) | |
| self.on_trait_change(self._validate, ['value', 'min', 'max']) | |
| def _validate(self, name, old, new): | |
| """Validate min <= low <= high <= max""" | |
| if name == "value": | |
| low, high = new | |
| else: | |
| low, high = self.value | |
| low = max(low, self.min) | |
| high = min(high, self.max) | |
| self.value = (min(low, high), max(low, high)) | |
| class IntRangeSliderWidget(_BoundedIntRangeWidget): | |
| _view_name = Unicode('IntSliderView', sync=True) | |
| orientation = Enum([u'horizontal', u'vertical'], u'horizontal', | |
| help="Vertical or horizontal.", sync=True) | |
| range = Bool(True, help="Display a range selector", sync=True) | |
| readout = Bool(True, help="Display the current value of the slider next to it.", sync=True) |
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