This is a specialized type of tabGroup that implements a "lookout" menu: a set of buttons stacked atop one another, one for each tab. Clicking on a button makes the contents of the tab visible beneath the button.
Subclasses can set this to change default cellVAlign for a group. parameter DEFAULTENCLOSINGCLASS = "lookoutMenu";
Subclasses can set this to change default enclosingClass used for this component.
Indicates whether this menu supports the ability to expand and contract. property expanded as %ZEN.Datatype.boolean [ InitialExpression = 1 ];
Indicates whether this menu is expanded (children visible) or contracted (children not visible). property oncontract as %ZEN.Datatype.eventHandler;
oncontract event handler: If defined and this menu is expandable, this event is fired just before the children of this menu are hidden. property onexpand as %ZEN.Datatype.eventHandler;
onexpand event handler: If defined and this menu is expandable, this event is fired just before the children of this menu are made visible.
Subclasses implement this in order to render the static HTML contents of a component.
Called by tabs of this group to notify that they have become disabled.