/* Part of XPCE --- The SWI-Prolog GUI toolkit Author: Jan Wielemaker and Anjo Anjewierden E-mail: jan@swi.psy.uva.nl WWW: http://www.swi.psy.uva.nl/projects/xpce/ Copyright (c) 1996-2013, University of Amsterdam All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ :- module(pce_colour_browser, [ colour_browser/0 ]). :- use_module(library(pce)). :- require([ absolute_file_name/3 , send_list/3 ]). :- multifile user:file_search_path/2. :- dynamic user:file_search_path/2. user:file_search_path(x11, OpenWin) :- get(@pce, environment_variable, 'OPENWINHOME', OpenWin). user:file_search_path(x11, '/usr/lib/X11'). user:file_search_path(x11, '/usr/share/X11'). user:file_search_path(x11, PceLib) :- get(@pce, window_system, windows), get(@pce, home, PceHome), atom_concat(PceHome, '/lib', PceLib). /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - This demo implements a browser for the X11 predefined colours. The colour browser assumes the X11 colour database is located in x11('lib/rgb.txt'). - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ colour_browser :- make_colour_browser(CB), send(CB, open). make_colour_browser(CB) :- absolute_file_name(x11(rgb), [ extensions([txt]), access(read), file_errors(fail) ], DataBase), !, make_colour_browser(CB, DataBase). make_colour_browser(CB) :- make_colour_browser(CB, @colour_names). make_colour_browser(CB, DataBase) :- new(D, dialog), send(D, append, new(M, menu(which, choice))), send_list(M, append, [foreground, background]), send(M, selection, background), send(new(CB, browser('XPCE (X11) named colours')), below, D), send(CB, width, 40), send(CB, font, fixed), send(CB?key_binding, function, % pretend arrow up/down not only cursor_down, % do the preview, but also show and(message(CB, next_line),% the colour immediately message(CB, enter))), send(CB?key_binding, function, cursor_up, and(message(CB, previous_line), message(CB, enter))), % Make a picture with some different % graphicals for preview send(new(P, picture(size := size(100, 25))), below, CB), send(P, ver_stretch, 0), send(P, ver_shrink, 0), send(P, format, new(Fmt, format(vertical, 1, @on))), send(Fmt, adjustment, vector(center)), send(P, display, graphical(0, 0, 0, 25)), send(P, display, text(hello, left, normal)), send(P, display, text(hello, left, bold)), send(P, display, new(Box, box(30, 12))), send(P, display, line(0, 0, 30, 0)), send(Box, fill_pattern, @black_image), % A colour is selected; call % selected_colour/3, using the % picture, fore/back ground and % the description of the colour send(CB, select_message, message(@prolog, selected_colour, P, M?selection, @arg1?label)), % set tab-stops for nice alignment send(CB?image, tab_stops, vector(170)), % scan de database ( send(DataBase, instance_of, hash_table) -> send(DataBase, for_all, message(@prolog, append_colour, CB, @arg1, @arg2)), send(CB, sort) ; new(F, file(DataBase)), ( send(F, open, read) -> repeat, ( get(F, read_line, String) -> get(String, scan, '%d%d%d%*[ \t]%[a-zA-Z0-9_ ]', vector(R, G, B, Name)), format(atom(HexName), '#~|~`0t~16r~2+~`0t~16r~2+~`0t~16r~2+', [R,G,B]), send(Name, translate, ' ', '_'), send(Name, downcase), get(Name, value, Atom), ( get(CB, member, Atom, _) -> true ; send(CB, append, dict_item(Name, string('%s\t%3d %3d %3d %s', Name, R, G, B, HexName))) ), fail ; !, send(F, close) ) ) ). append_colour(CB, Name, RGB) :- B is RGB >> 16, G is (RGB >> 8) /\ 255, R is (RGB /\ 255), format(atom(HexName), '#~|~`0t~16r~2+~`0t~16r~2+~`0t~16r~2+', [R,G,B]), send(CB, append, string('%s\t%3d %3d %3d %s', Name, R, G, B, HexName)). /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A colour was selected. Change the colour attribute of the picture window. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ selected_colour(P, Which, Label) :- get(Label, scan, '%s%d%d%d', vector(NameStr, R, G, B)), send(@display, cut_buffer, 0, NameStr), XR is R * 257, XG is G * 257, XB is B * 257, send(P, Which, colour(@default, XR, XG, XB)).