widget.h

   1 /* Very basic widgets for SDL
   2  * Ben Lynn
   3  */
   4 /*
   5 Copyright (C) 2004 Benjamin Lynn (blynn@cs.stanford.edu)
   6
   7 This program is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public License
   9 as published by the Free Software Foundation; either version 2
  10 of the License, or (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20 */
  21 #ifndef WIDGET_H
  22 #define WIDGET_H
  23
  24 #include <SDL.h>
  25
  26 enum {
  27     signal_activate = 0,
  28     signal_count
  29 };
  30
  31 struct widget_s {
  32     int x, y;
  33     int w, h;
  34     int localx, localy;
  35     struct widget_s *parent;
  36     void (*update)(struct widget_s *);
  37     void (*handle_click)(struct widget_s *, int, int, int);
  38     void (*computexy)(struct widget_s *);
  39     //TODO: replace with hash table?
  40     void (*signal_handler[signal_count])(struct widget_s *w, void *data);
  41     void *data[signal_count];
  42 };
  43 typedef struct widget_s widget_t[1];
  44 typedef struct widget_s *widget_ptr;
  45
  46 void widget_init(widget_ptr wid);
  47 void widget_computexy(widget_ptr wid);
  48 void widget_put_geometry(void *p, int x, int y, int w, int h);
  49 void widget_put_handler(widget_ptr p, void (* f)(widget_ptr, void *), int sig);
  50 void widget_put_handler_data(widget_ptr p,
  51         void (* f)(widget_ptr, void *), void *data, int sig);
  52 void widget_fill(widget_ptr w, int c);
  53 void widget_fillrect(widget_ptr w, SDL_Rect *rect, int c);
  54 void widget_blit(void *p, SDL_Surface *s, SDL_Rect *src, SDL_Rect *dst);
  55 void widget_raise_signal(widget_ptr w, int sig);
  56 void widget_update(void *p);
  57 int in_widget(widget_ptr wid, int x, int y);
  58 void widget_raised_border(widget_ptr rect);
  59 void widget_raised_background(widget_ptr rect);
  60 void widget_lowered_border(widget_ptr rect);
  61 void widget_lowered_background(widget_ptr rect);
  62
  63 extern SDL_Surface *screen;
  64 #endif //WIDGET_H