src/button.cpp

   1 //
   2 // C Implementation: button
   3 //
   4 // Description:
   5 //
   6 //
   7 // Author: Tobias Glaesser <tobi.web@gmx.de>, (C) 2004
   8 //
   9 // Copyright: See COPYING file that comes with this distribution
  10 //
  11 //
  12
  13 #include <string.h>
  14 #include <stdlib.h>
  15 #include "setup.h"
  16 #include "screen.h"
  17 #include "globals.h"
  18 #include "button.h"
  19
  20 void button_load(button_type* pbutton,char* icon_file, char* info, SDLKey shortcut, int x, int y)
  21 {
  22   char filename[1024];
  23
  24   if(icon_file != NULL)
  25     {
  26       snprintf(filename, 1024, "%s/%s", datadir.c_str(), icon_file);
  27       if(!faccessible(filename))
  28         snprintf(filename, 1024, "%s/images/icons/default-icon.png", datadir.c_str());
  29     }
  30   else
  31     {
  32       snprintf(filename, 1024, "%s/images/icons/default-icon.png", datadir.c_str());
  33     }
  34   texture_load(&pbutton->icon,filename,USE_ALPHA);
  35
  36   if(info == NULL)
  37     {
  38       pbutton->info = NULL;
  39     }
  40   else
  41     {
  42       pbutton->info = (char*) malloc(sizeof(char)*(strlen(info) + 1));
  43       strcpy(pbutton->info,info);
  44     }
  45
  46   pbutton->shortcut = shortcut;
  47
  48   pbutton->x = x;
  49   pbutton->y = y;
  50   pbutton->w = pbutton->icon.w;
  51   pbutton->h = pbutton->icon.h;
  52   pbutton->tag = -1;
  53   pbutton->state = -1;
  54   pbutton->show_info = NO;
  55   pbutton->bkgd = NULL;
  56 }
  57
  58 void button_change_icon(button_type* pbutton,char* icon_file)
  59 {
  60   char filename[1024];
  61
  62   if(icon_file != NULL)
  63     {
  64       snprintf(filename, 1024, "%s/%s", datadir.c_str(), icon_file);
  65       if(!faccessible(filename))
  66         snprintf(filename, 1024, "%s/images/icons/default-icon.png", datadir.c_str());
  67     }
  68   else
  69     {
  70       snprintf(filename, 1024, "%s/images/icons/default-icon.png", datadir.c_str());
  71     }
  72
  73   texture_free(&pbutton->icon);
  74   texture_load(&pbutton->icon,filename,USE_ALPHA);
  75 }
  76
  77 button_type* button_create(char* icon_file, char* info, SDLKey shortcut, int x, int y)
  78 {
  79   button_type* pnew_button = (button_type*) malloc(sizeof(button_type));
  80   button_load(pnew_button,icon_file, info, shortcut, x, y);
  81   return pnew_button;
  82 }
  83
  84 void button_draw(button_type* pbutton)
  85 {
  86   fillrect(pbutton->x,pbutton->y,pbutton->w,pbutton->h,75,75,75,200);
  87   fillrect(pbutton->x+1,pbutton->y+1,pbutton->w-2,pbutton->h-2,175,175,175,200);
  88   if(pbutton->bkgd != NULL)
  89   {
  90   texture_draw(pbutton->bkgd,pbutton->x,pbutton->y,NO_UPDATE);
  91   }
  92   texture_draw(&pbutton->icon,pbutton->x,pbutton->y,NO_UPDATE);
  93   if(pbutton->show_info == YES)
  94     {
  95       char str[80];
  96       int i = -32;
  97
  98       if(0 > pbutton->x - (int)strlen(pbutton->info) * white_small_text.w)
  99         i = pbutton->w + strlen(pbutton->info) * white_small_text.w;
 100
 101       if(pbutton->info)
 102         text_draw(&white_small_text, pbutton->info, i + pbutton->x - strlen(pbutton->info) * white_small_text.w, pbutton->y, 1, NO_UPDATE);
 103       sprintf(str,"(%s)", SDL_GetKeyName(pbutton->shortcut));
 104       text_draw(&white_small_text, str, i + pbutton->x - strlen(str) * white_small_text.w, pbutton->y + white_small_text.h+2, 1, NO_UPDATE);
 105     }
 106   if(pbutton->state == BUTTON_PRESSED)
 107     fillrect(pbutton->x,pbutton->y,pbutton->w,pbutton->h,75,75,75,200);
 108   else if(pbutton->state == BUTTON_HOVER)
 109     fillrect(pbutton->x,pbutton->y,pbutton->w,pbutton->h,150,150,150,128);
 110 }
 111
 112 void button_free(button_type* pbutton)
 113 {
 114   free(pbutton->info);
 115   texture_free(&pbutton->icon);
 116 }
 117
 118 void button_event(button_type* pbutton, SDL_Event *event)
 119 {
 120   SDLKey key = event->key.keysym.sym;
 121
 122   if(event->motion.x > pbutton->x && event->motion.x < pbutton->x + pbutton->w &&
 123       event->motion.y > pbutton->y && event->motion.y < pbutton->y + pbutton->h)
 124     {
 125       if(event->type == SDL_MOUSEBUTTONDOWN)
 126         {
 127           if(event->button.button == SDL_BUTTON_LEFT)
 128             {
 129               pbutton->state = BUTTON_PRESSED;
 130             }
 131           else
 132             {
 133               pbutton->show_info = YES;
 134             }
 135         }
 136       else if(event->type == SDL_MOUSEBUTTONUP)
 137         {
 138           if(event->button.button == SDL_BUTTON_LEFT && pbutton->state == BUTTON_PRESSED)
 139             {
 140               pbutton->state = BUTTON_CLICKED;
 141             }
 142           else if(event->button.button != SDL_BUTTON_LEFT && pbutton->state != BUTTON_PRESSED)
 143             {
 144               pbutton->show_info = YES;
 145             }
 146         }
 147
 148       if(pbutton->state != BUTTON_PRESSED && pbutton->state != BUTTON_CLICKED)
 149         {
 150           pbutton->state = BUTTON_HOVER;
 151         }
 152     }
 153   else if(event->type != SDL_KEYDOWN && event->type != SDL_KEYUP)
 154     {
 155       pbutton->state = -1;
 156       if(pbutton->show_info)
 157         {
 158           pbutton->show_info = NO;
 159         }
 160     }
 161
 162   if(event->type == SDL_KEYDOWN)
 163     {
 164       if(key == pbutton->shortcut)
 165         pbutton->state = BUTTON_PRESSED;
 166     }
 167   else if(event->type == SDL_KEYUP)
 168     {
 169       if(pbutton->state == BUTTON_PRESSED && key == pbutton->shortcut)
 170         pbutton->state = BUTTON_CLICKED;
 171     }
 172   else if(event->type == SDL_MOUSEMOTION)
 173     {
 174
 175       if(pbutton->show_info)
 176         {
 177           pbutton->show_info = NO;
 178         }
 179     }
 180 }
 181
 182 int button_get_state(button_type* pbutton)
 183 {
 184   int state;
 185   if(pbutton->state == BUTTON_CLICKED)
 186     {
 187       state = pbutton->state;
 188       pbutton->state = -1;
 189       return state;
 190     }
 191   else
 192     {
 193       return pbutton->state;
 194     }
 195 }
 196
 197 void button_panel_init(button_panel_type* pbutton_panel, int x, int y, int w, int h)
 198 {
 199   pbutton_panel->num_items = 0;
 200   pbutton_panel->item = NULL;
 201   pbutton_panel->x = x;
 202   pbutton_panel->y = y;
 203   pbutton_panel->w = w;
 204   pbutton_panel->h = h;
 205   pbutton_panel->hidden = NO;
 206 }
 207
 208 button_type* button_panel_event(button_panel_type* pbutton_panel, SDL_Event* event)
 209 {
 210   if(pbutton_panel->hidden == NO)
 211     {
 212       int i;
 213       for(i = 0; i < pbutton_panel->num_items; ++i)
 214         {
 215           button_event(&pbutton_panel->item[i],event);
 216           if(pbutton_panel->item[i].state != -1)
 217             return &pbutton_panel->item[i];
 218         }
 219       return NULL;
 220     }
 221   else
 222     {
 223       return NULL;
 224     }
 225 }
 226
 227 void button_panel_free(button_panel_type* pbutton_panel)
 228 {
 229   int i;
 230   for(i = 0; i < pbutton_panel->num_items; ++i)
 231     {
 232       button_free(&pbutton_panel->item[i]);
 233     }
 234   if(pbutton_panel->num_items)
 235     free(pbutton_panel->item);
 236 }
 237
 238 void button_panel_draw(button_panel_type* pbutton_panel)
 239 {
 240   if(pbutton_panel->hidden == NO)
 241     {
 242       int i;
 243       fillrect(pbutton_panel->x,pbutton_panel->y,pbutton_panel->w,pbutton_panel->h,100,100,100,200);
 244       for(i = 0; i < pbutton_panel->num_items; ++i)
 245         {
 246           button_draw(&pbutton_panel->item[i]);
 247         }
 248     }
 249 }
 250
 251 void button_panel_additem(button_panel_type* pbutton_panel, button_type* pbutton, int tag)
 252 {
 253   int max_cols, row, col;
 254
 255   ++pbutton_panel->num_items;
 256   pbutton_panel->item = (button_type*) realloc(pbutton_panel->item, sizeof(button_type) * pbutton_panel->num_items);
 257   memcpy(&pbutton_panel->item[pbutton_panel->num_items-1],pbutton,sizeof(button_type));
 258   free(pbutton);
 259
 260   /* A button_panel takes control of the buttons it contains and arranges them */
 261
 262   max_cols = pbutton_panel->w / 32;
 263
 264   row = (pbutton_panel->num_items-1) / max_cols;
 265   col = (pbutton_panel->num_items-1) % max_cols;
 266
 267   pbutton_panel->item[pbutton_panel->num_items-1].x = pbutton_panel->x + col * 32;
 268   pbutton_panel->item[pbutton_panel->num_items-1].y = pbutton_panel->y + row * 32;
 269   pbutton_panel->item[pbutton_panel->num_items-1].tag = tag;
 270
 271 }
 272