myapp :-
    new(Frame, frame('Reporter demo')),
    new(B, browser),
    send(new(picture), right, B),
    send(new(MD, dialog), above, B),
    send(new(RD, dialog), below, B),
    send(Frame, append, B),

    send(MD, append, new(MB, menu_bar)),
    send(MD, gap, size(0,0)),
    send(MD, pen, 0),
    send(MB, append, new(File, popup(file))),
    send_list(File, append,
              [ menu_item(load, message(@prolog, load, Frame),
                          end_group := @on),
                menu_item(quit, message(Frame, destroy))
              ]),

    send(RD, append, label(reporter)),
    send(RD, gap, size(5, 0)),
    send(Frame, open).

:- pce_autoload(finder, library(find_file)).
:- pce_global(@finder, new(finder)).

load(Frame) :-
    get(@finder, file, exists := @on, FileName),
    send(Frame, report, progress, 'Loading %s ...', FileName),
    get(Frame, member, browser, Browser),
    new(File, file(FileName)),
    send(File, open, read),
    (   repeat,
            (   get(File, read_line, Line)
            ->  send(Line, strip),
                send(Browser, append, Line),
                fail
            ;   !,
                send(File, close)
            )
    ),
    send(Frame, report, done).