apps/menu.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 Robert E. Hak
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 /*
  20 2005 Kevin Ferrare :
  21  - Multi screen support
  22  - Rewrote/removed a lot of code now useless with the new gui API
  23 */
  24 #include <stdbool.h>
  25 #include <stdlib.h>
  26
  27 #include "hwcompat.h"
  28 #include "lcd.h"
  29 #include "font.h"
  30 #include "backlight.h"
  31 #include "menu.h"
  32 #include "button.h"
  33 #include "kernel.h"
  34 #include "debug.h"
  35 #include "usb.h"
  36 #include "panic.h"
  37 #include "settings.h"
  38 #include "status.h"
  39 #include "screens.h"
  40 #include "talk.h"
  41 #include "lang.h"
  42 #include "misc.h"
  43 #include "action.h"
  44
  45 #ifdef HAVE_LCD_BITMAP
  46 #include "icons.h"
  47 #endif
  48
  49 /* gui api */
  50 #include "list.h"
  51 #include "statusbar.h"
  52 #include "buttonbar.h"
  53
  54 struct menu {
  55     struct menu_item* items;
  56     int (*callback)(int, int);
  57 #ifdef HAS_BUTTONBAR
  58     struct gui_buttonbar buttonbar;
  59 #endif
  60     struct gui_synclist synclist;
  61 };
  62
  63 #define MAX_MENUS 6
  64
  65 static struct menu menus[MAX_MENUS];
  66 static bool inuse[MAX_MENUS] = { false };
  67
  68 char * menu_get_itemname(int selected_item, void * data, char *buffer)
  69 {
  70     struct menu *local_menus=(struct menu *)data;
  71     (void)buffer;
  72     return(P2STR(local_menus->items[selected_item].desc));
  73 }
  74
  75 int menu_find_free(void)
  76 {
  77     int i;
  78     /* Tries to find an unused slot to put the new menu */
  79     for ( i=0; i<MAX_MENUS; i++ ) {
  80         if ( !inuse[i] ) {
  81             inuse[i] = true;
  82             break;
  83         }
  84     }
  85     if ( i == MAX_MENUS ) {
  86         DEBUGF("Out of menus!\n");
  87         return -1;
  88     }
  89     return(i);
  90 }
  91
  92 int menu_init(const struct menu_item* mitems, int count, int (*callback)(int, int),
  93               const char *button1, const char *button2, const char *button3)
  94 {
  95     int menu=menu_find_free();
  96     if(menu==-1)/* Out of menus */
  97         return -1;
  98     menus[menu].items = (struct menu_item*)mitems; /* de-const */
  99     gui_synclist_init(&(menus[menu].synclist),
 100                       &menu_get_itemname, &menus[menu], false, 1);
 101     gui_synclist_set_icon_callback(&(menus[menu].synclist), NULL);
 102     gui_synclist_set_nb_items(&(menus[menu].synclist), count);
 103     menus[menu].callback = callback;
 104 #ifdef HAS_BUTTONBAR
 105     gui_buttonbar_init(&(menus[menu].buttonbar));
 106     gui_buttonbar_set_display(&(menus[menu].buttonbar), &(screens[SCREEN_MAIN]) );
 107     gui_buttonbar_set(&(menus[menu].buttonbar), button1, button2, button3);
 108 #else
 109     (void)button1;
 110     (void)button2;
 111     (void)button3;
 112 #endif
 113     return menu;
 114 }
 115
 116 void menu_exit(int m)
 117 {
 118     inuse[m] = false;
 119 }
 120
 121 int menu_show(int m)
 122 {
 123 #ifdef HAS_BUTTONBAR
 124     gui_buttonbar_draw(&(menus[m].buttonbar));
 125 #endif
 126     bool exit = false;
 127     int key;
 128
 129     gui_synclist_draw(&(menus[m].synclist));
 130     gui_syncstatusbar_draw(&statusbars, true);
 131     menu_talk_selected(m);
 132     while (!exit) {
 133         key = get_action(CONTEXT_MAINMENU,HZ/2);
 134         /*
 135          * "short-circuit" the default keypresses by running the
 136          * callback function
 137          * The callback may return a new key value, often this will be
 138          * BUTTON_NONE or the same key value, but it's perfectly legal
 139          * to "simulate" key presses by returning another value.
 140          */
 141         if( menus[m].callback != NULL )
 142             key = menus[m].callback(key, m);
 143         /* If moved, "say" the entry under the cursor */
 144         if(gui_synclist_do_button(&(menus[m].synclist), key))
 145             menu_talk_selected(m);
 146         switch( key ) {
 147             case ACTION_STD_OK:
 148                 action_signalscreenchange();
 149                 return gui_synclist_get_sel_pos(&(menus[m].synclist));
 150
 151
 152             case ACTION_STD_CANCEL:
 153             case ACTION_STD_MENU:
 154                 exit = true;
 155                 break;
 156
 157             default:
 158                 if(default_event_handler(key) == SYS_USB_CONNECTED)
 159                     return MENU_ATTACHED_USB;
 160                 break;
 161         }
 162         gui_syncstatusbar_draw(&statusbars, false);
 163     }
 164     action_signalscreenchange();
 165     return MENU_SELECTED_EXIT;
 166 }
 167
 168
 169 bool menu_run(int m)
 170 {
 171     int selected;
 172     while (1) {
 173         switch (selected=menu_show(m))
 174         {
 175             case MENU_SELECTED_EXIT:
 176                 return false;
 177
 178             case MENU_ATTACHED_USB:
 179                 return true;
 180
 181             default:
 182             {
 183                 if (menus[m].items[selected].function &&
 184                     menus[m].items[selected].function())
 185                     return  true;
 186                 gui_syncstatusbar_draw(&statusbars, true);
 187             }
 188         }
 189     }
 190     return false;
 191 }
 192
 193 /*
 194  *  Property function - return the current cursor for "menu"
 195  */
 196
 197 int menu_cursor(int menu)
 198 {
 199     return gui_synclist_get_sel_pos(&(menus[menu].synclist));
 200 }
 201
 202 /*
 203  *  Property function - return the "menu" description at "position"
 204  */
 205
 206 char* menu_description(int menu, int position)
 207 {
 208     return P2STR(menus[menu].items[position].desc);
 209 }
 210
 211 /*
 212  *  Delete the element "position" from the menu items in "menu"
 213  */
 214
 215 void menu_delete(int menu, int position)
 216 {
 217     int i;
 218     int nb_items=gui_synclist_get_nb_items(&(menus[menu].synclist));
 219     /* copy the menu item from the one below */
 220     for( i = position; i < nb_items - 1; i++)
 221         menus[menu].items[i] = menus[menu].items[i + 1];
 222
 223     gui_synclist_del_item(&(menus[menu].synclist));
 224 }
 225
 226 void menu_insert(int menu, int position, char *desc, bool (*function) (void))
 227 {
 228     int i;
 229     int nb_items=gui_synclist_get_nb_items(&(menus[menu].synclist));
 230     if(position < 0)
 231        position = nb_items;
 232
 233     /* Move the items below one position forward */
 234     for( i = nb_items; i > position; i--)
 235        menus[menu].items[i] = menus[menu].items[i - 1];
 236
 237     /* Update the current item */
 238     menus[menu].items[position].desc = (unsigned char *)desc;
 239     menus[menu].items[position].function = function;
 240     gui_synclist_add_item(&(menus[menu].synclist));
 241 }
 242
 243 /*
 244  *  Property function - return the "count" of menu items in "menu"
 245  */
 246
 247 int menu_count(int menu)
 248 {
 249     return gui_synclist_get_nb_items(&(menus[menu].synclist));
 250 }
 251
 252 /*
 253  *  Allows a menu item at the current cursor position in "menu"
 254  * to be moved up the list
 255  */
 256
 257 bool menu_moveup(int menu)
 258 {
 259     struct menu_item swap;
 260     int selected=menu_cursor(menu);
 261     /* can't be the first item ! */
 262     if( selected == 0)
 263         return false;
 264
 265     /* use a temporary variable to do the swap */
 266     swap = menus[menu].items[selected - 1];
 267     menus[menu].items[selected - 1] = menus[menu].items[selected];
 268     menus[menu].items[selected] = swap;
 269
 270     gui_synclist_select_previous(&(menus[menu].synclist));
 271     return true;
 272 }
 273
 274 /*
 275  *  Allows a menu item at the current cursor position in "menu" to be moved down the list
 276  */
 277
 278 bool menu_movedown(int menu)
 279 {
 280     struct menu_item swap;
 281     int selected=menu_cursor(menu);
 282     int nb_items=gui_synclist_get_nb_items(&(menus[menu].synclist));
 283
 284     /* can't be the last item ! */
 285     if( selected == nb_items - 1)
 286         return false;
 287
 288     /* use a temporary variable to do the swap */
 289     swap = menus[menu].items[selected + 1];
 290     menus[menu].items[selected + 1] = menus[menu].items[selected];
 291     menus[menu].items[selected] = swap;
 292
 293     gui_synclist_select_next(&(menus[menu].synclist));
 294     return true;
 295 }
 296
 297 /*
 298  * Allows to set the cursor position. Doesn't redraw by itself.
 299  */
 300
 301 void menu_set_cursor(int menu, int position)
 302 {
 303     gui_synclist_select_item(&(menus[menu].synclist), position);
 304 }
 305
 306 void menu_talk_selected(int m)
 307 {
 308     if(global_settings.talk_menu)
 309     {
 310         int selected=gui_synclist_get_sel_pos(&(menus[m].synclist));
 311         int voice_id = P2ID(menus[m].items[selected].desc);
 312         if (voice_id >= 0) /* valid ID given? */
 313             talk_id(voice_id, false); /* say it */
 314     }
 315 }
 316
 317 void menu_draw(int m)
 318 {
 319     gui_synclist_draw(&(menus[m].synclist));
 320 }
 321
 322 /* count in letter positions, NOT pixels */
 323 void put_cursorxy(int x, int y, bool on)
 324 {
 325 #ifdef HAVE_LCD_BITMAP
 326     int fh, fw;
 327     int xpos, ypos;
 328
 329     /* check here instead of at every call (ugly, but cheap) */
 330     if (global_settings.invert_cursor)
 331         return;
 332
 333     lcd_getstringsize((unsigned char *)"A", &fw, &fh);
 334     xpos = x*6;
 335     ypos = y*fh + lcd_getymargin();
 336     if ( fh > 8 )
 337         ypos += (fh - 8) / 2;
 338 #endif
 339
 340     /* place the cursor */
 341     if(on) {
 342 #ifdef HAVE_LCD_BITMAP
 343         lcd_mono_bitmap(bitmap_icons_6x8[Icon_Cursor], xpos, ypos, 4, 8);
 344 #else
 345         lcd_putc(x, y, CURSOR_CHAR);
 346 #endif
 347     }
 348     else {
 349 #if defined(HAVE_LCD_BITMAP)
 350         /* I use xy here since it needs to disregard the margins */
 351         lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
 352         lcd_fillrect (xpos, ypos, 4, 8);
 353         lcd_set_drawmode(DRMODE_SOLID);
 354 #else
 355         lcd_putc(x, y, ' ');
 356 #endif
 357     }
 358 }