An element, a symbol, a geometry object or a string.
An element or a geometry object.
The generic function
parse-layout-descriptor takes a description of a layout's child, and returns the object that the layout is actually going to use. The returned object is an element (simple-pane or pinboard-object) or a geometry object (the result of call to the default method of
parse-layout-descriptor is called by interpret-description to parse individual children in a layout.
Note that when
parse-layout-descriptor is passed an element, it does not necessarily return that element. For example, it may wrap it with some layout that adds functionality. It may also return a completely separate element.
CAPI User Guide and Reference Manual (Windows version) - 3 Aug 2017