frame-modal

A modal frame must be completed before its context can be used again. By default (@nil) the user may operate on any frame. transient blocks just the frame in frame<-transient_for; application blocks every frame in the same frame<-application.

Typical pattern:

display_for(Owner, Result) :-
        new(D, dialog('Enter information')),
        send(D, transient_for, Owner),
        send(D, modal, transient),
        <fill the dialog>
        get(D, confirm_centered,
            Owner?area?center, Return),
        send(D, destroy),
        Return \== @nil.

See also frame<-confirm, frame->transient_for and class application.