SliderMapper¶

class spectacoular.factory.SliderMapper(obj, traitname)¶

Bases: TraitWidgetMapper

Factory that creates Slider widget from a class trait attribute.

create_widget(**kwargs)¶

creates a Bokeh Slider widget instance from class trait attribute.

Currently, only attributes of type Range are supported.

Parameters:

**kwargsargs of Slider

additional arguments of Slider widget. :attr:´value´, :attr:´start´ and :attr:´end´ are of type float

Returns:

instance(Slider).

set_widget(widget)¶

connects a Bokeh Slider widget instance to a class trait attribute

Parameters:

widgetinstance(Slider)

instance of a Slider widget.

Returns:

None.

create_trait_setter_func()¶

creates a function that casts the type of a widget value into the type of the class trait attribute.

the function is evoked every time the widget value changes. The value of a Select, :class: TextInput, …, widget is always type str. However, traitvalues can be of arbitrary type. Thus, widgetvalues need to be casted.

Returns:

callable.