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- //
- // "$Id: fl_symbols.cxx,v 1.8 1999/02/22 22:09:17 mike Exp $"
- //
- // Symbol drawing code for the Fast Light Tool Kit (FLTK).
- //
- // 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".
- //
-
- // These are small graphics drawn by the normal label-drawing
- // code when the string starts with an '@' sign.
-
- // Adapted from original code written by:
-
- // Written by Mark Overmars
- // Version 2.1 a
- // Date: Oct 2, 1992
-
- #include <FL/Fl.H>
- #include <FL/fl_draw.H>
- #include <string.h>
-
- typedef struct {
- const char *name;
- void (*drawit)(Fl_Color);
- char scalable;
- char notempty;
- } SYMBOL;
-
- #define MAXSYMBOL 211
- /* Maximal number of symbols in table. Only half of them are
- used. Should be prime. */
-
- static SYMBOL symbols[MAXSYMBOL]; /* The symbols */
- static int symbnumb = -1; /* Their number */
-
- static int find(const char *name) {
- // returns hash entry if it exists, or first empty slot:
- int pos = name[0] ? (
- name[1] ? (
- name[2] ? 71*name[0]+31*name[1]+name[2] : 31*name[0]+name[1]
- ) :
- name[0]
- ) : 0;
- pos %= MAXSYMBOL;
- int hh2 = name[0] ? (
- (name[1]) ? 51*name[0]+3*name[1] : 3*name[0]
- ) : 1;
- hh2 %= MAXSYMBOL; if (!hh2) hh2 = 1;
- for (;;) {
- if (!symbols[pos].notempty) return pos;
- if (!strcmp(symbols[pos].name,name)) return pos;
- pos = (pos + hh2) % MAXSYMBOL;
- }
- }
-
- static void fl_init_symbols(void);
-
- /**************** The routines seen by the user *************************/
-
- int fl_add_symbol(const char *name, void (*drawit)(Fl_Color), int scalable)
- /* Adds a symbol to the system. Returns whether correct. */
- {
- fl_init_symbols();
- int pos;
- if (symbnumb > MAXSYMBOL / 2) return 0; // table is full
- pos = find(name);
- symbols[pos].name = name;
- symbols[pos].drawit = drawit;
- symbols[pos].notempty = 1;
- symbols[pos].scalable = scalable;
- symbnumb++;
- return 1;
- }
-
- int fl_return_arrow(int x,int y,int w,int h);
-
- // provided for back compatability:
- int fl_draw_symbol(const char *label,int x,int y,int w,int h,Fl_Color col) {
- const char *p = label;
- if (*p++ != '@') return 0;
- fl_init_symbols();
- int equalscale = 0;
- if (*p == '#') {equalscale = 1; p++;}
- if (*p == '-' && p[1]>='1' && p[1]<='9') {
- int n = p[1]-'0';
- x += n; y += n; w -= 2*n; h -= 2*n;
- p += 2;
- } else if (*p == '+' && p[1]>='1' && p[1]<='9') {
- int n = p[1]-'0';
- x -= n; y -= n; w += 2*n; h += 2*n;
- p += 2;
- }
- if (w < 10) {x -= (10-w)/2; w = 10;}
- if (h < 10) {y -= (10-h)/2; h = 10;}
- w = (w-1)|1; h = (h-1)|1;
- int rotangle;
- switch (*p++) {
- case '0':
- rotangle = 1000*(p[1]-'0') + 100*(p[2]-'0') + 10*(p[3]-'0');
- p += 4;
- break;
- case '1': rotangle = 2250; break;
- case '2': rotangle = 2700; break;
- case '3': rotangle = 3150; break;
- case '4': rotangle = 1800; break;
- case '5':
- case '6': rotangle = 0; break;
- case '7': rotangle = 1350; break;
- case '8': rotangle = 900; break;
- case '9': rotangle = 450; break;
- default: rotangle = 0; p--; break;
- }
- int pos = find(p);
- if (!symbols[pos].notempty) return 0;
- if (symbols[pos].scalable == 3) { // kludge to detect return arrow
- fl_return_arrow(x,y,w,h);
- return 1;
- }
- fl_push_matrix();
- fl_translate(x+w/2,y+h/2);
- if (symbols[pos].scalable) {
- if (equalscale) {if (w<h) h = w; else w = h;}
- fl_scale(0.5*w, 0.5*h);
- fl_rotate(rotangle/10.0);
- }
- (symbols[pos].drawit)(col);
- fl_pop_matrix();
- return 1;
- }
-
- /******************** THE DEFAULT SYMBOLS ****************************/
-
- /* Some help stuff */
-
- #define BP fl_begin_polygon()
- #define EP fl_end_polygon()
- #define BL fl_begin_line()
- #define EL fl_end_line()
- #define BC fl_begin_loop()
- #define EC fl_end_loop()
- #define vv(x,y) fl_vertex(x,y)
-
- //for the outline color
- static void set_outline_color(Fl_Color c) {
- fl_color(fl_color_average(c, FL_BLACK, .5));
- }
-
- static void rectangle(double x,double y,double x2,double y2,Fl_Color col) {
- fl_color(col);
- BP; vv(x,y); vv(x2,y); vv(x2,y2); vv(x,y2); EP;
- set_outline_color(col);
- BC; vv(x,y); vv(x2,y); vv(x2,y2); vv(x,y2); EC;
- }
-
- /* The drawing routines */
-
- static void draw_arrow1(Fl_Color col)
- {
- fl_color(col);
- BP; vv(-0.8,-0.4); vv(-0.8,0.4); vv(0.0,0.4); vv(0.0,-0.4); EP;
- BP; vv(0.0,0.8); vv(0.8,0.0); vv(0.0,-0.8); vv(0.0,-0.4); vv(0.0,0.4); EP;
- set_outline_color(col);
- BC; vv(-0.8,-0.4); vv(-0.8,0.4); vv(0.0,0.4); vv(0.0,0.8); vv(0.8,0.0);
- vv(0.0,-0.8); vv(0.0,-0.4); EC;
- }
-
- static void draw_arrow1bar(Fl_Color col)
- {
- draw_arrow1(col);
- rectangle(.6,-.8,.9,.8,col);
- }
-
- static void draw_arrow2(Fl_Color col)
- {
- fl_color(col);
- BP; vv(-0.3,0.8); vv(0.50,0.0); vv(-0.3,-0.8); EP;
- set_outline_color(col);
- BC; vv(-0.3,0.8); vv(0.50,0.0); vv(-0.3,-0.8); EC;
- }
-
- static void draw_arrow3(Fl_Color col)
- {
- fl_color(col);
- BP; vv(0.1,0.8); vv(0.9,0.0); vv(0.1,-0.8); EP;
- BP; vv(-0.7,0.8); vv(0.1,0.0); vv(-0.7,-0.8); EP;
- set_outline_color(col);
- BC; vv(0.1,0.8); vv(0.9,0.0); vv(0.1,-0.8); EC;
- BC; vv(-0.7,0.8); vv(0.1,0.0); vv(-0.7,-0.8); EC;
- }
-
- static void draw_arrowbar(Fl_Color col)
- {
- fl_color(col);
- BP; vv(0.2,0.8); vv(0.6,0.8); vv(0.6,-0.8); vv(0.2,-0.8); EP;
- BP; vv(-0.6,0.8); vv(0.2,0.0); vv(-0.6,-0.8); EP;
- set_outline_color(col);
- BC; vv(0.2,0.8); vv(0.6,0.8); vv(0.6,-0.8); vv(0.2,-0.8); EC;
- BC; vv(-0.6,0.8); vv(0.2,0.0); vv(-0.6,-0.8); EC;
- }
-
- static void draw_arrowbox(Fl_Color col)
- {
- fl_color(col);
- BP; vv(-0.6,0.8); vv(0.2,0.0); vv(-0.6,-0.8); EP;
- BC; vv(0.2,0.8); vv(0.6,0.8); vv(0.6,-0.8); vv(0.2,-0.8); EC;
- set_outline_color(col);
- BC; vv(0.2,0.8); vv(0.6,0.8); vv(0.6,-0.8); vv(0.2,-0.8); EC;
- BC; vv(-0.6,0.8); vv(0.2,0.0); vv(-0.6,-0.8); EC;
- }
-
- static void draw_bararrow(Fl_Color col)
- {
- fl_color(col);
- BP; vv(0.1,0.8); vv(0.9,0.0); vv(0.1,-0.8); EP;
- BP; vv(-0.5,0.8); vv(-0.1,0.8); vv(-0.1,-0.8); vv(-0.5,-0.8); EP;
- set_outline_color(col);
- BC; vv(0.1,0.8); vv(0.9,0.0); vv(0.1,-0.8); EC;
- BC; vv(-0.5,0.8); vv(-0.1,0.8); vv(-0.1,-0.8); vv(-0.5,-0.8); EC;
- }
-
- static void draw_doublebar(Fl_Color col) {
- rectangle(-0.6,-0.8,-.1,.8,col);
- rectangle(.1,-0.8,.6,.8,col);
- }
-
- static void draw_arrow01(Fl_Color col)
- { fl_rotate(180); draw_arrow1(col); }
-
- static void draw_arrow02(Fl_Color col)
- { fl_rotate(180); draw_arrow2(col); }
-
- static void draw_arrow03(Fl_Color col)
- { fl_rotate(180); draw_arrow3(col); }
-
- static void draw_0arrowbar(Fl_Color col)
- { fl_rotate(180); draw_arrowbar(col); }
-
- static void draw_0arrowbox(Fl_Color col)
- { fl_rotate(180); draw_arrowbox(col); }
-
- static void draw_0bararrow(Fl_Color col)
- { fl_rotate(180); draw_bararrow(col); }
-
- static void draw_doublearrow(Fl_Color col)
- {
- fl_color(col);
- BP; vv(-0.35,-0.4); vv(-0.35,0.4); vv(0.35,0.4); vv(0.35,-0.4); EP;
- BP; vv(0.15,0.8); vv(0.95,0.0); vv(0.15,-0.8); EP;
- BP; vv(-0.15,0.8); vv(-0.95,0.0); vv(-0.15,-0.8); EP;
- set_outline_color(col);
- BC; vv(-0.15,0.4); vv(0.15,0.4); vv(0.15,0.8); vv(0.95,0.0);
- vv(0.15,-0.8); vv(0.15,-0.4); vv(-0.15,-0.4); vv(-0.15,-0.8);
- vv(-0.95,0.0); vv(-0.15,0.8); EC;
- }
-
- static void draw_arrow(Fl_Color col)
- {
- fl_color(col);
- BP; vv(0.65,0.1); vv(1.0,0.0); vv(0.65,-0.1); EP;
- BL; vv(-1.0,0.0); vv(0.65,0.0); EL;
- set_outline_color(col);
- BL; vv(-1.0,0.0); vv(0.65,0.0); EL;
- BC; vv(0.65,0.1); vv(1.0,0.0); vv(0.65,-0.1); EC;
- }
-
- static void draw_square(Fl_Color col)
- { rectangle(-1,-1,1,1,col); }
-
- static void draw_circle(Fl_Color col) {
- fl_color(col); BP; fl_circle(0,0,1); EP;
- set_outline_color(col);
- BC; fl_circle(0,0,1); EC;
- }
-
- static void draw_line(Fl_Color col)
- { fl_color(col); BL; vv(-1.0,0.0); vv(1.0,0.0); EL; }
-
- static void draw_plus(Fl_Color col)
- {
- fl_color(col);
- BP; vv(-0.9,-0.15); vv(-0.9,0.15); vv(0.9,0.15); vv(0.9,-0.15); EP;
- BP; vv(-0.15,-0.9); vv(-0.15,0.9); vv(0.15,0.9); vv(0.15,-0.9); EP;
- set_outline_color(col);
- BC;
- vv(-0.9,-0.15); vv(-0.9,0.15); vv(-0.15,0.15); vv(-0.15,0.9);
- vv(0.15,0.9); vv(0.15,0.15); vv(0.9,0.15); vv(0.9,-0.15);
- vv(0.15,-0.15); vv(0.15,-0.9); vv(-0.15,-0.9); vv(-0.15,-0.15);
- EC;
- }
-
- static void draw_uparrow(Fl_Color) {
- fl_color(FL_LIGHT3);
- BL; vv(-.8,.8); vv(-.8,-.8); vv(.8,0); EL;
- fl_color(FL_DARK3);
- BL; vv(-.8,.8); vv(.8, 0); EL;
- }
-
- static void draw_downarrow(Fl_Color) {
- fl_color(FL_DARK3);
- BL; vv(-.8,.8); vv(-.8,-.8); vv(.8,0); EL;
- fl_color(FL_LIGHT3);
- BL; vv(-.8,.8); vv(.8, 0); EL;
- }
-
- static void draw_menu(Fl_Color col)
- {
- rectangle(-0.65, 0.85, 0.65, -0.25, col);
- rectangle(-0.65, -0.6, 0.65, -1.0, col);
- }
-
- static void fl_init_symbols(void) {
- static char beenhere;
- if (beenhere) return;
- beenhere = 1;
- symbnumb = 0;
-
- fl_add_symbol("", draw_arrow1, 1);
- fl_add_symbol("->", draw_arrow1, 1);
- fl_add_symbol(">", draw_arrow2, 1);
- fl_add_symbol(">>", draw_arrow3, 1);
- fl_add_symbol(">|", draw_arrowbar, 1);
- fl_add_symbol(">[]", draw_arrowbox, 1);
- fl_add_symbol("|>", draw_bararrow, 1);
- fl_add_symbol("<-", draw_arrow01, 1);
- fl_add_symbol("<", draw_arrow02, 1);
- fl_add_symbol("<<", draw_arrow03, 1);
- fl_add_symbol("|<", draw_0arrowbar, 1);
- fl_add_symbol("[]<", draw_0arrowbox, 1);
- fl_add_symbol("<|", draw_0bararrow, 1);
- fl_add_symbol("<->", draw_doublearrow, 1);
- fl_add_symbol("-->", draw_arrow, 1);
- fl_add_symbol("+", draw_plus, 1);
- fl_add_symbol("->|", draw_arrow1bar, 1);
- fl_add_symbol("arrow", draw_arrow, 1);
- fl_add_symbol("returnarrow", 0, 3);
- fl_add_symbol("square", draw_square, 1);
- fl_add_symbol("circle", draw_circle, 1);
- fl_add_symbol("line", draw_line, 1);
- fl_add_symbol("plus", draw_plus, 1);
- fl_add_symbol("menu", draw_menu, 1);
- fl_add_symbol("UpArrow", draw_uparrow, 1);
- fl_add_symbol("DnArrow", draw_downarrow, 1);
- fl_add_symbol("||", draw_doublebar, 1);
- }
-
- ////////////////////////////////////////////////////////////////
-
- #include <FL/Fl_Widget.H>
-
- // this is the labeltype function:
- extern void fl_normal_label(const Fl_Label*, int, int, int, int, Fl_Align);
- static void fl_symbol_label(
- const Fl_Label* o, int x, int y, int w, int h, Fl_Align align)
- {
- if (!fl_draw_symbol(o->value, x, y, w, h, (Fl_Color)o->color))
- fl_normal_label(o, x, y, w, h, align);
- }
-
- Fl_Labeltype define_FL_SYMBOL_LABEL() {
- Fl::set_labeltype(_FL_SYMBOL_LABEL, fl_symbol_label, 0);
- return _FL_SYMBOL_LABEL;
- }
-
- void Fl::enable_symbols() {
- Fl::set_labeltype(FL_NORMAL_LABEL, fl_symbol_label, 0);
- }
-
- //
- // End of "$Id: fl_symbols.cxx,v 1.8 1999/02/22 22:09:17 mike Exp $".
- //
-