f84f5821b0
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@11917 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
341 lines
6.6 KiB
C++
341 lines
6.6 KiB
C++
//
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// "$Id$"
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//
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// X Color Browser demo program for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2010 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#include <FL/Fl.H>
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#include <FL/Fl_Double_Window.H>
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#include <FL/Fl_Button.H>
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#include <FL/Fl_Value_Slider.H>
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#include <FL/Fl_Hold_Browser.H>
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#include <FL/Fl_Box.H>
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#include <FL/fl_ask.H>
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#include <FL/filename.H>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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// some constants
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#define MAX_RGB 3000
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#define FL_FREE_COL4 ((Fl_Color)(FL_FREE_COLOR+3))
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#define FL_INDIANRED ((Fl_Color)(164))
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static Fl_Double_Window *cl;
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static Fl_Box *rescol;
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static Fl_Button *dbobj;
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static Fl_Hold_Browser *colbr;
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static Fl_Value_Slider *rs, *gs, *bs;
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static char dbname[FL_PATH_MAX];
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static void create_form_cl(void);
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static int load_browser(char *);
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typedef struct { int r, g, b; } RGBdb;
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static RGBdb rgbdb[MAX_RGB];
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int main(int argc, char *argv[])
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{
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Fl::args(argc, argv);
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create_form_cl();
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#ifdef __APPLE__
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// search for rgb.txt within the bundle
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strcpy(dbname, argv[0]);
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char *slash = strrchr(dbname, '/');
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if (slash)
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strcpy(slash, "/../Resources/rgb.txt");
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#else
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strcpy(dbname, "rgb.txt");
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#endif
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if (load_browser(dbname))
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dbobj->label(dbname);
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else
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dbobj->label("None");
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dbobj->redraw();
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cl->size_range(cl->w(),cl->h(),2*cl->w(),2*cl->h());
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cl->label("RGB Browser");
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cl->free_position();
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cl->show(argc,argv);
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return Fl::run();
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}
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static void set_entry(int i)
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{
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RGBdb *db = rgbdb + i;
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Fl::set_color(FL_FREE_COL4, db->r, db->g, db->b);
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rs->value(db->r);
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gs->value(db->g);
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bs->value(db->b);
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rescol->redraw();
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}
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static void br_cb(Fl_Widget *ob, long)
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{
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int r = ((Fl_Browser *)ob)->value();
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if (r <= 0)
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return;
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set_entry(r - 1);
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}
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static int read_entry(FILE * fp, int *r, int *g, int *b, char *name)
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{
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int n;
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char buf[512], *p;
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if (!fgets(buf, sizeof(buf) - 1, fp))
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return 0;
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if(buf[0] == '!') {
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if (fgets(buf,sizeof(buf)-1,fp)==0) {
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/* ignore */
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}
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}
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if(sscanf(buf, " %d %d %d %n", r, g, b, &n) < 3)
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return 0;
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p = buf + n;
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/* squeeze out all spaces */
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while (*p)
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{
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if (*p != ' ' && *p != '\n')
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*name++ = *p;
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p++;
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}
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*name = 0;
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return (feof(fp) || ferror(fp)) ? 0 : 1;
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}
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static int load_browser(char *fname)
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{
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FILE *fp;
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RGBdb *db = rgbdb, *dbs = db + MAX_RGB;
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int r, g, b, lr = -1 , lg = -1, lb = -1;
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char name[256], buf[256];
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#ifdef __EMX__
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if (!(fp = fl_fopen(__XOS2RedirRoot(fname), "r")))
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#else
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if (!(fp = fl_fopen(fname, "r")))
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#endif
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{
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fl_alert("%s\n%s\n%s","Load", fname, "Can't open");
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return 0;
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}
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/* read the items */
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for (; db < dbs && read_entry(fp, &r, &g, &b, name);)
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{
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db->r = r;
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db->g = g;
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db->b = b;
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/* unique the entries on the fly */
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if (lr != r || lg != g || lb != b)
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{
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db++;
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lr = r;
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lg = g;
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lb = b;
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sprintf(buf, "(%3d %3d %3d) %s", r, g, b, name);
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colbr->add(buf);
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}
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}
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fclose(fp);
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if (db < dbs)
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db->r = 1000; /* sentinel */
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else
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{
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db--;
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db->r = 1000;
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}
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colbr->topline(1);
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colbr->select(1,1);
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set_entry(0);
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return 1;
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}
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static int search_entry(int r, int g, int b)
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{
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RGBdb *db = rgbdb;
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int i, j, diffr, diffg, diffb;
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unsigned int diff, mindiff;
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mindiff = (unsigned int)~0;
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for (i = j = 0; db->r < 256; db++, i++)
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{
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diffr = r - db->r;
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diffg = g - db->g;
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diffb = b - db->b;
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#ifdef FL_LINEAR
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diff = unsigned(3.0 * (FL_abs(r - db->r)) +
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(5.9 * FL_abs(g - db->g)) +
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(1.1 * (FL_abs(b - db->b))));
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#else
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diff = unsigned(3.0 * (diffr *diffr) +
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5.9 * (diffg *diffg) +
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1.1 * (diffb *diffb));
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#endif
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if (mindiff > diff)
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{
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mindiff = diff;
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j = i;
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}
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}
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return j;
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}
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static void search_rgb(Fl_Widget *, long)
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{
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int r, g, b, i;
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int top = colbr->topline();
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r = int(rs->value());
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g = int(gs->value());
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b = int(bs->value());
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// fl_freeze_form(cl);
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Fl::set_color(FL_FREE_COL4, r, g, b);
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rescol->redraw();
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i = search_entry(r, g, b);
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/* change topline only if necessary */
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if(i < top || i > (top+15))
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colbr->topline(i-8);
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colbr->select(i+1, 1);
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// fl_unfreeze_form(cl);
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}
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/* change database */
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static void db_cb(Fl_Widget * ob, long)
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{
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const char *p = fl_input("Enter New Database Name", dbname);
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char buf[512];
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if (!p || strcmp(p, dbname) == 0)
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return;
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strcpy(buf, p);
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if (load_browser(buf))
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strcpy(dbname, buf);
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else
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ob->label(dbname);
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}
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static void done_cb(Fl_Widget *, long)
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{
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exit(0);
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}
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static void create_form_cl(void)
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{
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if (cl)
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return;
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cl = new Fl_Double_Window(400,385);
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cl->box(FL_UP_BOX);
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cl->color(FL_INDIANRED, FL_GRAY);
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Fl_Box *title = new Fl_Box(40, 10, 300, 30, "Color Browser");
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title->box(FL_NO_BOX);
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title->labelcolor(FL_RED);
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title->labelsize(32);
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title->labelfont(FL_HELVETICA_BOLD);
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title->labeltype(FL_SHADOW_LABEL);
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dbobj = new Fl_Button(40, 50, 300, 25, "");
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dbobj->type(FL_NORMAL_BUTTON);
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dbobj->box(FL_BORDER_BOX);
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dbobj->color(FL_INDIANRED,FL_INDIANRED);
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dbobj->callback(db_cb, 0);
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colbr = new Fl_Hold_Browser(10, 90, 280, 240, "");
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colbr->textfont(FL_COURIER);
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colbr->callback(br_cb, 0);
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colbr->box(FL_DOWN_BOX);
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rescol = new Fl_Box(300, 90, 90, 35, "");
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rescol->color(FL_FREE_COL4, FL_FREE_COL4);
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rescol->box(FL_BORDER_BOX);
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rs = new Fl_Value_Slider(300, 130, 30, 200, "");
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rs->type(FL_VERT_FILL_SLIDER);
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rs->color(FL_INDIANRED, FL_RED);
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rs->bounds(0, 255);
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rs->precision(0);
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rs->callback(search_rgb, 0);
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rs->when(FL_WHEN_RELEASE);
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gs = new Fl_Value_Slider(330, 130, 30, 200, "");
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gs->type(FL_VERT_FILL_SLIDER);
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gs->color(FL_INDIANRED, FL_GREEN);
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gs->bounds(0, 255);
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gs->precision(0);
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gs->callback(search_rgb, 1);
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gs->when(FL_WHEN_RELEASE);
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bs = new Fl_Value_Slider(360, 130, 30, 200, "");
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bs->type(FL_VERT_FILL_SLIDER);
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bs->color(FL_INDIANRED, FL_BLUE);
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bs->bounds(0, 255);
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bs->precision(0);
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bs->callback(search_rgb, 2);
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bs->when(FL_WHEN_RELEASE);
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Fl_Button *done = new Fl_Button(160, 345, 80, 30, "Done");
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done->type(FL_NORMAL_BUTTON);
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done->callback(done_cb, 0);
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cl->end();
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cl->resizable(cl);
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}
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//
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// End of "$Id$".
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//
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