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- //
- // "$Id: colbrowser.cxx,v 1.5 1999/01/07 19:17:51 mike Exp $"
- //
- // Forms test program for the Fast Light Tool Kit (FLTK).
- //
- // This is an XForms program from the 0.86 distribution of XForms.
- // It has been modified as little as possible to work under fltk by
- // using fltk's Forms emulation. Search for "fltk" to find all the
- // changes
- //
- // Copyright 1998-1999 by Bill Spitzak and others.
- //
- // This library is free software; you can redistribute it and/or
- // modify it under the terms of the GNU Library General Public
- // License as published by the Free Software Foundation; either
- // version 2 of the License, or (at your option) any later version.
- //
- // This library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- // Library General Public License for more details.
- //
- // You should have received a copy of the GNU Library General Public
- // License along with this library; if not, write to the Free Software
- // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- // USA.
- //
- // Please report all bugs and problems to "fltk-bugs@easysw.com".
- //
-
- #include <FL/forms.H> // changed for fltk
- #include <stdlib.h>
- #include <stdio.h> // added for fltk
- #include <string.h> // added for fltk
-
- #define MAX_RGB 3000
-
- static FL_FORM *cl;
- static Fl_Widget *rescol, *dbobj, *colbr, *rs, *gs, *bs;
- char dbname[FL_PATH_MAX];
- static void create_form_cl(void);
- static int load_browser(char *);
-
- /* the RGB data file does not have a standard location on unix. */
-
- #ifdef __VMS
- static char *rgbfile = "SYS$MANAGER:DECW$RGB.DAT";
- #else
- #ifdef __EMX__ /* OS2 */
- static char *rgbfile = "/XFree86/lib/X11/rgb.txt";
- #else
- #ifdef __FreeBSD__
- static char *rgbfile = "/usr/X11R6/lib/X11/rgb.txt";
- #else
- static char *rgbfile = "/usr/lib/X11/rgb.txt";
- #endif
- #endif
- #endif
-
- typedef struct { int r, g, b; } RGBdb;
-
- static RGBdb rgbdb[MAX_RGB];
-
- int
- main(int argc, char *argv[])
- {
-
- fl_initialize(&argc, argv, "FormDemo", 0, 0);
-
- create_form_cl();
- strcpy(dbname, rgbfile);
-
- if (load_browser(dbname))
- fl_set_object_label(dbobj, dbname);
- else
- fl_set_object_label(dbobj, "None");
-
- // fl_set_form_minsize(cl, cl->w , cl->h); // removed for fltk
- // fl_set_form_maxsize(cl, 2*cl->w , 2*cl->h); // removed for fltk
- cl->size_range(cl->w(),cl->h(),2*cl->w(),2*cl->h()); // added for fltk
- // border changed from FL_TRANSIENT for fltk:
- // This is so Esc & the close box will close the window.
- // (on transient windows attempting to close it just calls the callback)
- fl_show_form(cl, FL_PLACE_FREE, 1/*FL_TRANSIENT*/, "RGB Browser");
-
-
- while (fl_do_forms())
- ;
- return 0;
- }
-
- static void
- set_entry(int i)
- {
- RGBdb *db = rgbdb + i;
-
- fl_freeze_form(cl);
- // unclear why demo is doing this. This messes up FL:
- // fl_mapcolor(FL_FREE_COL4+i, db->r, db->g, db->b);
- fl_mapcolor(FL_FREE_COL4, db->r, db->g, db->b);
- fl_set_slider_value(rs, db->r);
- fl_set_slider_value(gs, db->g);
- fl_set_slider_value(bs, db->b);
- fl_redraw_object(rescol);
- fl_unfreeze_form(cl);
- }
-
- static void
- br_cb(Fl_Widget * ob, long)
- {
- int r = fl_get_browser(ob);
-
- if (r <= 0)
- return;
- set_entry(r - 1);
- }
-
- static int
- read_entry(FILE * fp, int *r, int *g, int *b, char *name)
- {
- int n;
- char buf[512], *p;
-
- if (!fgets(buf, sizeof(buf) - 1, fp))
- return 0;
-
- if(buf[0] == '!')
- fgets(buf,sizeof(buf)-1,fp);
-
- if(sscanf(buf, " %d %d %d %n", r, g, b, &n) < 3)
- return 0;
-
- p = buf + n;
-
- /* squeeze out all spaces */
- while (*p)
- {
- if (*p != ' ' && *p != '\n')
- *name++ = *p;
- p++;
- }
- *name = 0;
-
- return (feof(fp) || ferror(fp)) ? 0 : 1;
- }
-
-
- static int
- load_browser(char *fname)
- {
- FILE *fp;
- RGBdb *db = rgbdb, *dbs = db + MAX_RGB;
- int r, g, b, lr = -1 , lg = -1, lb = -1;
- char name[256], buf[256];
- #ifdef __EMX__
- if (!(fp = fopen(__XOS2RedirRoot(fname), "r")))
- #else
- if (!(fp = fopen(fname, "r")))
- #endif
- {
- fl_show_alert("Load", fname, "Can't open", 0);
- return 0;
- }
-
- /* read the items */
-
- fl_freeze_form(cl);
-
- for (; db < dbs && read_entry(fp, &r, &g, &b, name);)
- {
- db->r = r;
- db->g = g;
- db->b = b;
-
- /* unique the entries on the fly */
- if (lr != r || lg != g || lb != b)
- {
- db++;
- lr = r;
- lg = g;
- lb = b;
- sprintf(buf, "(%3d %3d %3d) %s", r, g, b, name);
- fl_addto_browser(colbr, buf);
- }
- }
- fclose(fp);
-
- if (db < dbs)
- db->r = 1000; /* sentinel */
- else
- {
- db--;
- db->r = 1000;
- }
-
- fl_set_browser_topline(colbr, 1);
- fl_select_browser_line(colbr, 1);
- set_entry(0);
- fl_unfreeze_form(cl);
- return 1;
- }
-
- static int
- search_entry(int r, int g, int b)
- {
- register RGBdb *db = rgbdb;
- int i, j, diffr, diffg, diffb;
- unsigned int diff, mindiff;
-
- mindiff = ~0;
- for (i = j = 0; db->r < 256; db++, i++)
- {
- diffr = r - db->r;
- diffg = g - db->g;
- diffb = b - db->b;
-
- #ifdef FL_LINEAR
- diff = unsigned(3.0 * (FL_abs(r - db->r)) +
- (5.9 * FL_abs(g - db->g)) +
- (1.1 * (FL_abs(b - db->b)));
- #else
- diff = unsigned(3.0 * (diffr *diffr) +
- 5.9 * (diffg *diffg) +
- 1.1 * (diffb *diffb));
- #endif
-
- if (mindiff > diff)
- {
- mindiff = diff;
- j = i;
- }
- }
-
- return j;
- }
-
- static void
- search_rgb(Fl_Widget *, long)
- {
- int r, g, b, i;
- int top = fl_get_browser_topline(colbr);
-
- r = int(fl_get_slider_value(rs));
- g = int(fl_get_slider_value(gs));
- b = int(fl_get_slider_value(bs));
-
- fl_freeze_form(cl);
- fl_mapcolor(FL_FREE_COL4, r, g, b);
- fl_redraw_object(rescol);
- i = search_entry(r, g, b);
- /* change topline only if necessary */
- if(i < top || i > (top+15))
- fl_set_browser_topline(colbr, i-8);
- fl_select_browser_line(colbr, i + 1);
- fl_unfreeze_form(cl);
- }
-
- /* change database */
- static void
- db_cb(Fl_Widget * ob, long)
- {
- const char *p = fl_show_input("Enter New Database Name", dbname);
- char buf[512];
-
- if (!p || strcmp(p, dbname) == 0)
- return;
-
- strcpy(buf, p);
- if (load_browser(buf))
- strcpy(dbname, buf);
- else
- fl_set_object_label(ob, dbname);
- }
-
- static void
- done_cb(Fl_Widget *, long)
- {
- exit(0);
- }
-
- static void
- create_form_cl(void)
- {
- Fl_Widget *obj;
-
- if (cl)
- return;
-
- cl = fl_bgn_form(FL_NO_BOX, 330, 385);
- obj = fl_add_box(FL_UP_BOX, 0, 0, 330, 385, "");
- fl_set_object_color(obj, FL_INDIANRED, FL_COL1);
-
- obj = fl_add_box(FL_NO_BOX, 40, 10, 250, 30, "Color Browser");
- fl_set_object_lcol(obj, FL_RED);
- fl_set_object_lsize(obj, FL_HUGE_SIZE);
- fl_set_object_lstyle(obj, FL_BOLD_STYLE + FL_SHADOW_STYLE);
-
- dbobj = obj = fl_add_button(FL_NORMAL_BUTTON, 40, 50, 250, 25, "");
- fl_set_object_boxtype(obj, FL_BORDER_BOX);
- fl_set_object_color(obj, /*fl_get_visual_depth()==1 ? FL_WHITE:*/ FL_INDIANRED,
- FL_INDIANRED);
- fl_set_object_callback(obj, db_cb, 0);
- rs = obj = fl_add_valslider(FL_VERT_FILL_SLIDER, 225, 130, 30, 200, "");
- fl_set_object_color(obj, FL_INDIANRED, FL_RED);
- fl_set_slider_bounds(obj, 0, 255);
- fl_set_slider_precision(obj, 0);
- fl_set_object_callback(obj, search_rgb, 0);
- fl_set_slider_return(obj, 0);
-
- gs = obj = fl_add_valslider(FL_VERT_FILL_SLIDER, 255, 130, 30, 200, "");
- fl_set_object_color(obj, FL_INDIANRED, FL_GREEN);
- fl_set_slider_bounds(obj, 0, 255);
- fl_set_slider_precision(obj, 0);
- fl_set_object_callback(obj, search_rgb, 1);
- fl_set_slider_return(obj, 0);
-
- bs = obj = fl_add_valslider(FL_VERT_FILL_SLIDER, 285, 130, 30, 200, "");
- fl_set_object_color(obj, FL_INDIANRED, FL_BLUE);
- fl_set_slider_bounds(obj, 0, 255);
- fl_set_slider_precision(obj, 0);
- fl_set_object_callback(obj, search_rgb, 2);
- fl_set_slider_return(obj, 0);
-
-
- colbr = obj = fl_add_browser(FL_HOLD_BROWSER, 10, 90, 205, 240, "");
- fl_set_browser_fontstyle(obj, FL_FIXED_STYLE);
- fl_set_object_callback(obj, br_cb, 0);
-
-
- obj = fl_add_button(FL_NORMAL_BUTTON, 135, 345, 80, 30, "Done");
- fl_set_object_callback(obj, done_cb, 0);
-
- rescol = obj = fl_add_box(FL_FLAT_BOX, 225, 90, 90, 35, "");
- fl_set_object_color(obj, FL_FREE_COL4, FL_FREE_COL4);
- fl_set_object_boxtype(obj, FL_BORDER_BOX);
-
-
- fl_end_form();
- fl_scale_form(cl, 1.1, 1.0);
- }
-
- //
- // End of "$Id: colbrowser.cxx,v 1.5 1999/01/07 19:17:51 mike Exp $".
- //
-