The ThumbWheel Widget

View Class: ThumbWheel
Spec Class: ThumbWheelSpec

ID	Unique symbolic name (ID) of the widget. This ID can be used by the application to access the widget via `"builder>>componentAt:ID"`.
Model	Aspect selector or binding for the model, holding the thumbs value. Usually a `ValueModel`* instance.
Min	The thumbs minimum value.
Max	The thumbs maximum value.
Step	The thumbs stepping value.
KbdStep	The thumbs keyboard stepping value. This value will be used when the cursorUp/cursorDown key is pressed in the widget.
Orientation	Horizontal or vertical.

BG-Color	Defines the background color of the thumb. If the check toggle is marked, the widgets background color can be chosen by selecting the desired colored button. If the check toggle is not marked, the widget will use its default background color (from the style sheet).
Initially Disabled	Turns on/off that the widget is initially disabled.
Initially Invisible	Turns on/off that the widget is initially invisible.
Can Tab	Turns on/off that the widget can be reached by tabbing.

Enable

Aspect selector or binding for en-/disabling the widget.
It should return a

- Boolean instance** (only for static behavior)
- ValueModel* instance with a Boolean instance**

If a value holder is returned by the application,
the widgets can be dynamically enabled/disabled simply
by changing the valueHolders contents.

Start Move	Message selector of a method which is invoked when a motion action is started.
End Move	Message selector of a method which is invoked when a motion action is finished.

* = ValueHolder, AspectAdaptor, BufferedValueHolder, RangeAdaptor, TriggerValue
** = true, false

see document "Using the Help Tool"