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fltk/test/colbrowser.cxx

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//
// "$Id: colbrowser.cxx,v 1.5.2.5 2001/04/24 19:43:18 easysw Exp $"
//
// Forms test program for the Fast Light Tool Kit (FLTK).
//
// This is an XForms program from the 0.86 distribution of XForms.
// It has been modified as little as possible to work under fltk by
// using fltk's Forms emulation. Search for "fltk" to find all the
// changes
//
// Copyright 1998-2001 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@fltk.org".
//
#include <FL/forms.H> // changed for fltk
#include <stdlib.h>
#include <stdio.h> // added for fltk
#include <string.h> // added for fltk
#define MAX_RGB 3000
static FL_FORM *cl;
static Fl_Widget *rescol, *dbobj, *colbr, *rs, *gs, *bs;
char dbname[FL_PATH_MAX];
static void create_form_cl(void);
static int load_browser(char *);
/* the RGB data file does not have a standard location on unix. */
#ifdef __VMS
static const char *rgbfile = "SYS$MANAGER:DECW$RGB.DAT";
#else
#ifdef __EMX__ /* OS2 */
#include <X11/XlibInt.h>
static const char *rgbfile = "/XFree86/lib/X11/rgb.txt";
#else
#ifdef __FreeBSD__
static const char *rgbfile = "/usr/X11R6/lib/X11/rgb.txt";
#else
static const 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 1.5.2.5 2001/04/24 19:43:18 easysw Exp $".
//
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