MODULE window;

(* One window with text and a Close button. *)

FROM InOut IMPORT WriteString, WriteLn;
IMPORT tv;

VAR e : tv.Event; quit : BOOLEAN; w, t, b, st : tv.ViewPtr; cmd : INTEGER;

BEGIN
    IF NOT tv.Init() THEN WriteString("not a tty"); WriteLn; HALT END;

    st := tv.NewView(tv.VText, 0, tv.Rows() - 1, tv.Cols(), 1);
    tv.SetText(st, " Drag the title bar, click Close or press Esc");
    tv.AddView(tv.Desk(), st);

    w := tv.NewView(tv.VWindow, 6, 3, 46, 10);
    tv.SetText(w, "Hello");
    t := tv.NewView(tv.VText, 8, 5, 42, 1);
    tv.SetText(t, "This is a TVision-style window.");
    tv.AddView(w, t);
    t := tv.NewView(tv.VText, 8, 6, 42, 1);
    tv.SetText(t, "Move it with the mouse.");
    tv.AddView(w, t);
    b := tv.NewView(tv.VButton, 8, 9, 10, 1);
    tv.SetText(b, "Close"); tv.SetTag(b, tv.cmClose); tv.AddView(w, b);
    tv.AddView(tv.Desk(), w);
    tv.FocusView(b);

    tv.Finish;
    quit := FALSE;
    WHILE NOT quit DO
        IF tv.Resized() THEN tv.Finish END;
        IF tv.ReadEvent(e) THEN
            IF (e.kind = tv.evKey) AND (e.key = tv.kEsc) THEN quit := TRUE
            ELSE
                cmd := tv.HandleEvent(e);
                IF (cmd = tv.cmClose) OR (cmd = tv.cmOK) THEN quit := TRUE END
            END;
            IF NOT quit THEN tv.Finish END
        END
    END;
    tv.Done
END window.