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ensure range widgets get value that is on a step

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This commit is contained in:
MinRK 2014-02-06 12:43:59 -08:00
parent a58ca8a0a0
commit ad6109692d
1 changed files with 10 additions and 6 deletions
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16
IPython/html/widgets/interaction.py
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@ -40,7 +40,7 @@ def _matches(o, pattern):
return all(isinstance(obj,kind) for obj,kind in comps)
def _get_min_max_value(min, max, value):
def _get_min_max_value(min, max, value=None, step=None):
"""Return min, max, value given input values with possible None."""
if value is None:
if not max > min:
@ -60,6 +60,10 @@ def _get_min_max_value(min, max, value):
raise TypeError('expected a number, got: %r' % value)
else:
raise ValueError('unable to infer range, value from: ({0}, {1}, {2})'.format(min, max, value))
if step:
# ensure value is on a step
r = (value - min) % step
value = value - r
return min, max, value
def _widget_abbrev_single_value(o):
@ -85,19 +89,19 @@ def _widget_abbrev(o):
"""Make widgets from abbreviations: single values, lists or tuples."""
if isinstance(o, (list, tuple)):
if _matches(o, (int, int)):
min, max, value = _get_min_max_value(o[0], o[1], None)
min, max, value = _get_min_max_value(o[0], o[1])
return IntSliderWidget(value=value, min=min, max=max)
elif _matches(o, (int, int, int)):
min, max, value = _get_min_max_value(o[0], o[1], None)
min, max, value = _get_min_max_value(o[0], o[1], step=o[2])
return IntSliderWidget(value=value, min=min, max=max, step=o[2])
elif _matches(o, (float, float)):
min, max, value = _get_min_max_value(o[0], o[1], None)
min, max, value = _get_min_max_value(o[0], o[1])
return FloatSliderWidget(value=value, min=min, max=max)
elif _matches(o, (float, float, float)):
min, max, value = _get_min_max_value(o[0], o[1], None)
min, max, value = _get_min_max_value(o[0], o[1], step=o[2])
return FloatSliderWidget(value=value, min=min, max=max, step=o[2])
elif _matches(o, (float, float, int)):
min, max, value = _get_min_max_value(o[0], o[1], None)
min, max, value = _get_min_max_value(o[0], o[1], step=o[2])
return FloatSliderWidget(value=value, min=min, max=max, step=float(o[2]))
elif all(isinstance(x, string_types) for x in o):
return DropdownWidget(value=unicode_type(o[0]),