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
;