ref: 3d94702bea267035144836a5929129fd848b4d79
dir: /DoConfig/fltk/test/colbrowser.cxx/
//
// "$Id$"
//
// X Color Browser demo program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Value_Slider.H>
#include <FL/Fl_Hold_Browser.H>
#include <FL/Fl_Box.H>
#include <FL/fl_ask.H>
#include <FL/filename.H>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
// some constants
#define MAX_RGB 3000
#define FL_FREE_COL4 ((Fl_Color)(FL_FREE_COLOR+3))
#define FL_INDIANRED ((Fl_Color)(164))
static Fl_Double_Window *cl;
static Fl_Box *rescol;
static Fl_Button *dbobj;
static Fl_Hold_Browser *colbr;
static Fl_Value_Slider *rs, *gs, *bs;
static char dbname[FL_PATH_MAX];
static void create_form_cl(void);
static int load_browser(char *);
typedef struct { int r, g, b; } RGBdb;
static RGBdb rgbdb[MAX_RGB];
int main(int argc, char *argv[])
{
Fl::args(argc, argv);
create_form_cl();
#ifdef __APPLE__
// search for rgb.txt within the bundle
strcpy(dbname, argv[0]);
char *slash = strrchr(dbname, '/');
if (slash)
strcpy(slash, "/../Resources/rgb.txt");
#else
strcpy(dbname, "rgb.txt");
#endif
if (load_browser(dbname))
dbobj->label(dbname);
else
dbobj->label("None");
dbobj->redraw();
cl->size_range(cl->w(),cl->h(),2*cl->w(),2*cl->h());
cl->label("RGB Browser");
cl->free_position();
cl->show(argc,argv);
return Fl::run();
}
static void set_entry(int i)
{
RGBdb *db = rgbdb + i;
Fl::set_color(FL_FREE_COL4, db->r, db->g, db->b);
rs->value(db->r);
gs->value(db->g);
bs->value(db->b);
rescol->redraw();
}
static void br_cb(Fl_Widget *ob, long)
{
int r = ((Fl_Browser *)ob)->value();
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] == '!') {
if (fgets(buf,sizeof(buf)-1,fp)==0) {
/* ignore */
}
}
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 = fl_fopen(__XOS2RedirRoot(fname), "r")))
#else
if (!(fp = fl_fopen(fname, "r")))
#endif
{
fl_alert("%s\n%s\n%s","Load", fname, "Can't open");
return 0;
}
/* read the items */
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);
colbr->add(buf);
}
}
fclose(fp);
if (db < dbs)
db->r = 1000; /* sentinel */
else
{
db--;
db->r = 1000;
}
colbr->topline(1);
colbr->select(1,1);
set_entry(0);
return 1;
}
static int search_entry(int r, int g, int b)
{
RGBdb *db = rgbdb;
int i, j, diffr, diffg, diffb;
unsigned int diff, mindiff;
mindiff = (unsigned int)~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 = colbr->topline();
r = int(rs->value());
g = int(gs->value());
b = int(bs->value());
// fl_freeze_form(cl);
Fl::set_color(FL_FREE_COL4, r, g, b);
rescol->redraw();
i = search_entry(r, g, b);
/* change topline only if necessary */
if(i < top || i > (top+15))
colbr->topline(i-8);
colbr->select(i+1, 1);
// fl_unfreeze_form(cl);
}
/* change database */
static void db_cb(Fl_Widget * ob, long)
{
const char *p = fl_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
ob->label(dbname);
}
static void done_cb(Fl_Widget *, long)
{
exit(0);
}
static void create_form_cl(void)
{
if (cl)
return;
cl = new Fl_Double_Window(400,385);
cl->box(FL_UP_BOX);
cl->color(FL_INDIANRED, FL_GRAY);
Fl_Box *title = new Fl_Box(40, 10, 300, 30, "Color Browser");
title->box(FL_NO_BOX);
title->labelcolor(FL_RED);
title->labelsize(32);
title->labelfont(FL_HELVETICA_BOLD);
title->labeltype(FL_SHADOW_LABEL);
dbobj = new Fl_Button(40, 50, 300, 25, "");
dbobj->type(FL_NORMAL_BUTTON);
dbobj->box(FL_BORDER_BOX);
dbobj->color(FL_INDIANRED,FL_INDIANRED);
dbobj->callback(db_cb, 0);
colbr = new Fl_Hold_Browser(10, 90, 280, 240, "");
colbr->textfont(FL_COURIER);
colbr->callback(br_cb, 0);
colbr->box(FL_DOWN_BOX);
rescol = new Fl_Box(300, 90, 90, 35, "");
rescol->color(FL_FREE_COL4, FL_FREE_COL4);
rescol->box(FL_BORDER_BOX);
rs = new Fl_Value_Slider(300, 130, 30, 200, "");
rs->type(FL_VERT_FILL_SLIDER);
rs->color(FL_INDIANRED, FL_RED);
rs->bounds(0, 255);
rs->precision(0);
rs->callback(search_rgb, 0);
rs->when(FL_WHEN_RELEASE);
gs = new Fl_Value_Slider(330, 130, 30, 200, "");
gs->type(FL_VERT_FILL_SLIDER);
gs->color(FL_INDIANRED, FL_GREEN);
gs->bounds(0, 255);
gs->precision(0);
gs->callback(search_rgb, 1);
gs->when(FL_WHEN_RELEASE);
bs = new Fl_Value_Slider(360, 130, 30, 200, "");
bs->type(FL_VERT_FILL_SLIDER);
bs->color(FL_INDIANRED, FL_BLUE);
bs->bounds(0, 255);
bs->precision(0);
bs->callback(search_rgb, 2);
bs->when(FL_WHEN_RELEASE);
Fl_Button *done = new Fl_Button(160, 345, 80, 30, "Done");
done->type(FL_NORMAL_BUTTON);
done->callback(done_cb, 0);
cl->end();
cl->resizable(cl);
}
//
// End of "$Id$".
//