The Tab Header Widget

View Class: TabView
Spec Class: TabViewSpec

The Tab Header Widget is used to provide a simple tab header control. Each tab header item may define its label, image, and color. The tab items can also be defined by using the Tab List Editor.

The Basics Section:

ID	Unique symbolic name (ID) of the tab header. This ID can be used by the application to access the widget via `"builder>>componentAt:#ID"`.
Model	Aspect selector or binding for the selected label (and list of the labels) of the tab header. It should return a `- String` instance (only for static behavior) `- ValueModel`* instance with a `String` instance `- SelectionInList` instance with a `Array` instance (and optional with an initial selection index) whereby `String` can also be replaced by a `Text` instance. The last model also provides the tab header with a list. In this case, it is not necessary to define an extra aspect for the list.
List	Aspect selector or binding for holding the list of the labels of the tab header. It should return a `- Array` instance (only for static behavior) `- List` instance `- ValueModel`* instance with a `Array` instance whereby the `Array` instance can also be replaced by an `OrderedCollection` instance or by a `SortedCollection` instance. They contain the items of the tab header as `String` instances, `Text` instances, `LabelAndIcon` instances, or as `TabItem` instances (The Tab List Editor is able to create a resource method returning a list of `TabItem` instances).
Index	Turns on/off that the value holder of the selection (model) is provided by the current list index of the item. If not turned on, the item itself is set in the value holder.
Tab List Editor	Opens a Tab List Editor on the application class and the defined selector.

The Details Section:

Font	Defines the font style of the tab header. After selecting the check toggle the font style can be chosen by selecting one of the Family/Face/Style/Size buttons. If no font style is selected, the tab header takes its default font style from the style sheet.
BG-Color	Defines the background color of the tab header. After selecting the check toggle the background color can be chosen by selecting the desired colored button. If no color is selected, the tab header takes its default background color from the style sheet.
Style	Defines the type of the border style of the tab item (Windows or Mac).
Orientation	Defines the side for the arrangement of the tab item (top, bottom, left, or right).
Level	Defines the width of the 3D-border. Positive values provide a raising, negative values provide a lowering of the tab header.
One Tab Per Row	Turns on/off that only one tab item is drawn per row.
Fit Tabs To View	Turns on/off that the tab items are fitted to the width of the widget's view.
Can Tab	Turns on/off that the tab header can be reached by tabbing.
Move Selected Row Down To View	Turns on/off that the row of the selected tab item is always moved down to the widget's view.

The Channels Section:

Enable

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

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

A value model is used to provide a dynamically changing of the ability of the tab header.

Select Condition Name of the selector sent to the application before a selection is performed.
It should return a Boolean instance.
If the selector ends with ':', the selector is performed with the index of the currently selected tab item as the passed argument.

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

The Help Section:

see document "Using the Help Tool"

The Layout Section:

see document "The Layout of the Widgets"