317 lines
7.3 KiB
C++
317 lines
7.3 KiB
C++
// This is an XForms program from the 0.86 distribution of XForms.
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// It has been modified as little as possible to work under fltk by
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// using fltk's Forms emulation.
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// Search for "fltk" to find all the changes
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#include <FL/forms.H> // changed for fltk
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#include <stdlib.h>
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#include <stdio.h> // added for fltk
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#include <string.h> // added for fltk
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#define MAX_RGB 3000
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static FL_FORM *cl;
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static Fl_Widget *rescol, *dbobj, *colbr, *rs, *gs, *bs;
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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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/* the RGB data file does not have a standard location on unix. */
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#ifdef __VMS
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static char *rgbfile = "SYS$MANAGER:DECW$RGB.DAT";
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#else
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#ifdef __EMX__ /* OS2 */
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static char *rgbfile = "/XFree86/lib/X11/rgb.txt";
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#else
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#ifdef __FreeBSD__
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static char *rgbfile = "/usr/X11R6/lib/X11/rgb.txt";
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#else
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static char *rgbfile = "/usr/lib/X11/rgb.txt";
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#endif
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#endif
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#endif
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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
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main(int argc, char *argv[])
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{
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fl_initialize(&argc, argv, "FormDemo", 0, 0);
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create_form_cl();
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strcpy(dbname, rgbfile);
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if (load_browser(dbname))
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fl_set_object_label(dbobj, dbname);
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else
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fl_set_object_label(dbobj, "None");
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// fl_set_form_minsize(cl, cl->w , cl->h); // removed for fltk
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// fl_set_form_maxsize(cl, 2*cl->w , 2*cl->h); // removed for fltk
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cl->size_range(cl->w(),cl->h(),2*cl->w(),2*cl->h()); // added for fltk
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// border changed from FL_TRANSIENT for fltk:
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// This is so Esc & the close box will close the window.
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// (on transient windows attempting to close it just calls the callback)
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fl_show_form(cl, FL_PLACE_FREE, 1/*FL_TRANSIENT*/, "RGB Browser");
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while (fl_do_forms())
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;
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return 0;
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}
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static void
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set_entry(int i)
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{
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RGBdb *db = rgbdb + i;
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fl_freeze_form(cl);
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// unclear why demo is doing this. This messes up FL:
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// fl_mapcolor(FL_FREE_COL4+i, db->r, db->g, db->b);
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fl_mapcolor(FL_FREE_COL4, db->r, db->g, db->b);
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fl_set_slider_value(rs, db->r);
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fl_set_slider_value(gs, db->g);
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fl_set_slider_value(bs, db->b);
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fl_redraw_object(rescol);
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fl_unfreeze_form(cl);
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}
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static void
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br_cb(Fl_Widget * ob, long)
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{
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int r = fl_get_browser(ob);
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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
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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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fgets(buf,sizeof(buf)-1,fp);
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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
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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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extern char *__XOS2RedirRoot(const char*);
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if (!(fp = fopen(__XOS2RedirRoot(fname), "r")))
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#else
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if (!(fp = fopen(fname, "r")))
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#endif
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{
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fl_show_alert("Load", fname, "Can't open", 0);
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return 0;
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}
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/* read the items */
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fl_freeze_form(cl);
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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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fl_addto_browser(colbr, 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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fl_set_browser_topline(colbr, 1);
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fl_select_browser_line(colbr, 1);
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set_entry(0);
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fl_unfreeze_form(cl);
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return 1;
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}
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static int
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search_entry(int r, int g, int b)
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{
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register 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 = ~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
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search_rgb(Fl_Widget *, long)
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{
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int r, g, b, i;
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int top = fl_get_browser_topline(colbr);
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r = int(fl_get_slider_value(rs));
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g = int(fl_get_slider_value(gs));
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b = int(fl_get_slider_value(bs));
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fl_freeze_form(cl);
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fl_mapcolor(FL_FREE_COL4, r, g, b);
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fl_redraw_object(rescol);
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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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fl_set_browser_topline(colbr, i-8);
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fl_select_browser_line(colbr, i + 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
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db_cb(Fl_Widget * ob, long)
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{
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const char *p = fl_show_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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fl_set_object_label(ob, dbname);
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}
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static void
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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
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create_form_cl(void)
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{
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Fl_Widget *obj;
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if (cl)
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return;
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cl = fl_bgn_form(FL_NO_BOX, 330, 385);
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obj = fl_add_box(FL_UP_BOX, 0, 0, 330, 385, "");
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fl_set_object_color(obj, FL_INDIANRED, FL_COL1);
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obj = fl_add_box(FL_NO_BOX, 40, 10, 250, 30, "Color Browser");
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fl_set_object_lcol(obj, FL_RED);
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fl_set_object_lsize(obj, FL_HUGE_SIZE);
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fl_set_object_lstyle(obj, FL_BOLD_STYLE + FL_SHADOW_STYLE);
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dbobj = obj = fl_add_button(FL_NORMAL_BUTTON, 40, 50, 250, 25, "");
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fl_set_object_boxtype(obj, FL_BORDER_BOX);
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fl_set_object_color(obj, /*fl_get_visual_depth()==1 ? FL_WHITE:*/ FL_INDIANRED,
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FL_INDIANRED);
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fl_set_object_callback(obj, db_cb, 0);
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rs = obj = fl_add_valslider(FL_VERT_FILL_SLIDER, 225, 130, 30, 200, "");
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fl_set_object_color(obj, FL_INDIANRED, FL_RED);
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fl_set_slider_bounds(obj, 0, 255);
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fl_set_slider_precision(obj, 0);
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fl_set_object_callback(obj, search_rgb, 0);
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fl_set_slider_return(obj, 0);
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gs = obj = fl_add_valslider(FL_VERT_FILL_SLIDER, 255, 130, 30, 200, "");
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fl_set_object_color(obj, FL_INDIANRED, FL_GREEN);
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fl_set_slider_bounds(obj, 0, 255);
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fl_set_slider_precision(obj, 0);
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fl_set_object_callback(obj, search_rgb, 1);
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fl_set_slider_return(obj, 0);
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bs = obj = fl_add_valslider(FL_VERT_FILL_SLIDER, 285, 130, 30, 200, "");
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fl_set_object_color(obj, FL_INDIANRED, FL_BLUE);
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fl_set_slider_bounds(obj, 0, 255);
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fl_set_slider_precision(obj, 0);
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fl_set_object_callback(obj, search_rgb, 2);
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fl_set_slider_return(obj, 0);
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colbr = obj = fl_add_browser(FL_HOLD_BROWSER, 10, 90, 205, 240, "");
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fl_set_browser_fontstyle(obj, FL_FIXED_STYLE);
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fl_set_object_callback(obj, br_cb, 0);
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obj = fl_add_button(FL_NORMAL_BUTTON, 135, 345, 80, 30, "Done");
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fl_set_object_callback(obj, done_cb, 0);
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rescol = obj = fl_add_box(FL_FLAT_BOX, 225, 90, 90, 35, "");
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fl_set_object_color(obj, FL_FREE_COL4, FL_FREE_COL4);
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fl_set_object_boxtype(obj, FL_BORDER_BOX);
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fl_end_form();
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fl_scale_form(cl, 1.1, 1.0);
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}
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