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/* $Id: learner.pl,v 1.1.1.1 1994/06/27 13:17:20 jan Exp $
Part of XPCE
Designed and implemented by Anjo Anjewierden and Jan Wielemaker
E-mail: jan@swi.psy.uva.nl
Copyright (C) 1994 University of Amsterdam. All rights reserved.
*/
:- discontiguous
send_event_text_box/2.
:- pce_begin_class(text_box, device, "Box with centered text").
resource(size, size, '100x50', "Default size").
resource(label_font, font, '@helvetica_bold_12', "Font for text").
initialise(TB, Label:[name]) :->
"Create a box with centered editable text"::
send(TB, send_super, initialise),
get(TB, resource_value, size, size(W, H)),
get(TB, resource_value, label_font, Font),
send(TB, display, box(W, H)),
send(TB, display, text(Label, center, Font)),
send(TB, recenter).
recenter(TB) :->
"Center text in box"::
get(TB, member, box, Box),
get(TB, member, text, Text),
send(Text, center, Box?center).
geometry(TB, X:[int], Y:[int], W:[int], H:[int]) :->
"Handle geometry-changes"::
get(TB, member, box, Box),
send(Box, set, 0, 0, W, H),
send(TB, recenter),
send(TB, send_super, geometry, X, Y).
fill_pattern(TB, Pattern:image*) :->
"Specify fill-pattern of the box"::
get(TB, member, box, Box),
send(Box, fill_pattern, Pattern).
fill_pattern(TB, Pattern:image*) :<-
"Read fill-pattern of the box"::
get(TB, member, box, Box),
get(Box, fill_pattern, Pattern).
string(TB, String:char_array) :->
"Specify string of the text"::
get(TB, member, text, Text),
send(Text, string, String).
string(TB, String:char_array) :<-
"Read string of the text"::
get(TB, member, text, Text),
get(Text, string, String).
:- pce_end_class.
/*******************************
* GRAPH EDITOR *
*******************************/
:- use_module(library(prompt)).
make_graph_editor(E) :-
new(E, picture('Graph Editor')),
send(E, popup, new(P, popup(options))),
send_list(P, append,
[ menu_item(add_new_box,
message(@prolog, add_new_box,
E, E?focus_event?position)),
menu_item(clear,
and(message(@display, confirm,
'Clear entire drawing?'),
message(E, clear)))
]),
send(E, open).
add_new_box(E, Pos) :-
prompt('Name of box',
[ name:name = Name
]),
send(E, display, text_box(Name), Pos).
/*******************************
* EDITING *
*******************************/
:- pce_extend_class(text_box).
:- pce_global(@move_resize_recogniser,
make_move_resize_recogniser).
make_move_resize_recogniser(R) :-
new(R, handler_group(new(resize_gesture),
new(move_gesture),
popup_gesture(new(P, popup(options))))),
TB = @arg1,
send_list(P, append,
[ menu_item(rename,
message(TB, rename),
end_group := @on),
menu_item(delete,
message(TB, free))
]).
event(TB, Ev:event) :->
( send(TB, send_super, event, Ev)
-> true
; send(@move_resize_recogniser, event, Ev)
).
rename(TB) :->
"Prompt for new name"::
prompt('Rename text box',
[ name:name = Name/TB?string
]),
send(TB, string, Name).
:- pce_end_class.
/*******************************
* LINKING *
*******************************/
:- pce_extend_class(text_box).
handle(0, h/2, link, west).
handle(w, h/2, link, east).
handle(w/2, 0, link, north).
handle(w/2, h, link, sourth).
:- pce_global(@link_recogniser, new(connect_gesture)).
event(TB, Ev:event) :->
( send(TB, send_super, event, Ev)
; send(@move_resize_recogniser, event, Ev)
; send(@link_recogniser, event, Ev)
).
:- pce_end_class.
/*******************************
* DUMP TO PROLOG *
*******************************/
assert_graph(E, Predicate) :-
functor(Term, Predicate, 2),
retractall(Term),
send(E?graphicals, for_all,
if(message(@arg1, instance_of, connection),
send(@prolog, assert_link,
Predicate,
@arg1?from?string?value,
@arg2?from?string?value))).
assert_link(Predicate, From, To) :-
Term =.. [Predicate, From, To],
assert(Term).
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