The Variable Horizontal Panel Widget

View Class: VariableHorizontalPanel
Spec Class: VariableHorizontalPanelSpec

The Variable Horizontal Panel Widget arranges other widgets horizontally,
and provides a resizing bar in between.

By default, a variablePanel as built by the GUI painter will divide its area evenly among its subviews.
In order to change this default, switch the GUI painter to "Geometry Test Mode", resize the subviews as required, go back into editing mode, and save the window specification.
I.e. the windowSpec will include the size ratios as present at saving time, and the panel will use those size ratios initially when the application is started.

The Basics Section:

ID	Unique symbolic name (ID) of the box. This ID can be used by the application to access the widget via `"builder>>componentAt:#ID"`.

The Details Section:

BG-Color	Defines the background color of the widget. After selecting the check toggle the background color can be chosen by selecting the desired colored button. If no color is selected, the widget takes its default background color from the style sheet.
Border	Defines the width of the border.
Level	Defines the width of the 3D-border. Positive values provide a raising, negative values provide a lowering of the widget.
Bar Width	Defines the width (in pixels) of the separating handle bar (i.e. the bar which separates the panels subviews). If left blank, the default (from the viewStyle setting) is used.
Handles	Controls if a resize-handle is drawn in the bar If 'Default', the viewStyle controls this setting.
Initially Invisible	Turns on/off that the widget is initially invisible.

The Help Section:

see document "Using the Help Tool"

The Layout Section:

see document "The Layout of the Widgets"