def _widget_abbrev(o):
"""Make widgets from abbreviations: single values, lists or tuples."""
float_or_int = (float, int)
if isinstance(o, (list, tuple)):
if o and all(isinstance(x, string_types) for x in o):
return DropdownWidget(values=[unicode_type(k) for k in o])
elif _matches(o, (float_or_int, float_or_int)):
min, max, value = _get_min_max_value(o[0], o[1])
if all(isinstance(_, int) for _ in o):
cls = IntSliderWidget
else:
cls = FloatSliderWidget
return cls(value=value, min=min, max=max)
elif _matches(o, (float_or_int, float_or_int, float_or_int)):
step = o[2]
if step <= 0:
raise ValueError("step must be >= 0, not %r" % step)
min, max, value = _get_min_max_value(o[0], o[1], step=step)
if all(isinstance(_, int) for _ in o):
cls = IntSliderWidget
else:
cls = FloatSliderWidget
return cls(value=value, min=min, max=max, step=step)
else:
return _widget_abbrev_single_value(o)
def _widget_abbrev_single_value(o):
"""Make widgets from single values, which can be used as parameter defaults."""
if isinstance(o, string_types):
return TextWidget(value=unicode_type(o))
elif isinstance(o, dict):
return DropdownWidget(values=o)
elif isinstance(o, bool):
return CheckboxWidget(value=o)
elif isinstance(o, float):
min, max, value = _get_min_max_value(None, None, o)
return FloatSliderWidget(value=o, min=min, max=max)
elif isinstance(o, int):
min, max, value = _get_min_max_value(None, None, o)
return IntSliderWidget(value=o, min=min, max=max)
else:
return None
