Container visibility (EXPAND, COLLAPSE)

Container expansion and collapse operators control whether the contents of a collapsible container are shown on a form. A collapsible container can be collapsed to hide its contents, and expanded to show them again; this state is part of the user's interactive view of the form.

As input, these operators take a single container of a form. The container must be collapsible. The resulting action expands or collapses that container for the user working with the form, and expects a form context.

Language

To declare actions that expand or collapse a container, use the EXPAND and COLLAPSE operators.

Examples

CLASS Store;
name = DATA ISTRING[100] (Store);

FORM dashboard
    OBJECTS s = Store
    PROPERTIES(s) name
;

DESIGN dashboard {
    NEW detailsBox {
        collapsible = TRUE;
        caption = 'Details';
        MOVE BOX(s);
    }
}

expandDetails {
    EXPAND CONTAINER dashboard.detailsBox;
}

collapseDetails {
    COLLAPSE CONTAINER dashboard.detailsBox;
}

EXTEND FORM dashboard
    PROPERTIES() expandDetails, collapseDetails
;