EZY GUI Forms

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EZY Prolog stores GUI declarations together with associated GUI code in EZY FORMS.

EZY Forms can be dialog or window:

EZY_FORM_TYPE  =
        ezy_form_window(RCT);
        ezy_form_dialog(RCT)
 

EZY Prolog forms has items, which describe GUI layout and Program code:

EZY_GUI_ITEM =
        src_gui(STRING DCL_FILE,EZY_WINDOW_LIST);
        src_pro(STRING PRO_FILE,STRING SOURCE);
        ezy_no_file
 

as well as information about program author, company name, copyright statement:

EZY_FORM = ezy_form(
        EZY_FORM_TYPE FORM_TYPE,
        STRING FORM_NAME,
        EZY_GUI_ITEM PROGRAM, 
        EZY_GUI_ITEM GUI_DECLARATIONS,
        STRING CREATED_BY, STRING COMPANY_NAME, STRING COPYRIGHT,
        INTEGER CRC_GUI, INTEGER CRC_PROGRAM)

EZY Prolog forms can be loaded by the following way:

predicates
    initialize_gui: EZY_INITIALIZE_GUI
    initialize_event_handlers(WINDOW)
clauses
initialize_gui(WINDOW):-
    write("GUI initialization started\n"),
    initialize_event_handlers(WINDOW),
% END OF GUI INITIALIZE
    write("GUI Initialization completed\n"),
    !.
initialize_event_handlers(WINDOW):-
    % code to initialize GUI elements
    !.
goal :-
    syspath(EXEPATH,_),
    concat(EXEPATH,"ezy_sample.ezy",FORMNAME),
    ezy_form_open(FORMNAME,initialize_gui,EZY_GUI_RESULT),
    write(EZY_GUI_RESULT),nl,
    !.