apps/gui/yesno.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 by Kevin Ferrare
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include "config.h"
  22 #include "yesno.h"
  23 #include "system.h"
  24 #include "kernel.h"
  25 #include "misc.h"
  26 #include "lang.h"
  27 #include "action.h"
  28 #include "talk.h"
  29 #include "settings.h"
  30 #include "viewport.h"
  31
  32
  33 struct gui_yesno
  34 {
  35     const struct text_message * main_message;
  36     const struct text_message * result_message[2];
  37
  38     struct viewport *vp;
  39     struct screen * display;
  40 };
  41
  42 static void talk_text_message(const struct text_message * message, bool enqueue)
  43 {
  44     int line;
  45     if(message)
  46     {
  47         for(line=0; line<message->nb_lines; line++)
  48         {
  49             long id = P2ID((unsigned char *)message->message_lines[line]);
  50             if(id>=0)
  51             {
  52                 talk_id(id, enqueue);
  53                 enqueue = true;
  54             }
  55         }
  56     }
  57 }
  58
  59 static int put_message(struct screen *display,
  60                         const struct text_message * message,
  61                         int start, int max_y)
  62 {
  63     int i;
  64     for(i=0; i<message->nb_lines && i+start<max_y; i++)
  65     {
  66         display->puts_scroll(0, i+start,
  67                              P2STR((unsigned char *)message->message_lines[i]));
  68     }
  69     return i;
  70 }
  71
  72 /*
  73  * Draws the yesno
  74  *  - yn : the yesno structure
  75  */
  76 static void gui_yesno_draw(struct gui_yesno * yn)
  77 {
  78     struct screen * display=yn->display;
  79     struct viewport *vp = yn->vp;
  80     int nb_lines, vp_lines, line_shift=0;
  81
  82     display->set_viewport(vp);
  83     display->clear_viewport();
  84     nb_lines = yn->main_message->nb_lines;
  85     vp_lines = viewport_get_nb_lines(vp);
  86
  87     if(nb_lines+3< vp_lines)
  88         line_shift=1;
  89
  90     line_shift += put_message(display, yn->main_message,
  91                               line_shift, vp_lines);
  92
  93     /* Space remaining for yes / no text ? */
  94     if(line_shift+2 <= vp_lines)
  95     {
  96         if(line_shift+3 <= vp_lines)
  97             line_shift++;
  98         display->puts(0, line_shift, str(LANG_CONFIRM_WITH_BUTTON));
  99 #ifdef HAVE_LCD_BITMAP
 100         display->puts(0, line_shift+1, str(LANG_CANCEL_WITH_ANY));
 101 #endif
 102     }
 103     display->update_viewport();
 104     display->set_viewport(NULL);
 105 }
 106
 107 /*
 108  * Draws the yesno result
 109  *  - yn : the yesno structure
 110  *  - result : the result tha must be displayed :
 111  *    YESNO_NO if no
 112  *    YESNO_YES if yes
 113  */
 114 static bool gui_yesno_draw_result(struct gui_yesno * yn, enum yesno_res result)
 115 {
 116     const struct text_message * message=yn->result_message[result];
 117     struct viewport *vp = yn->vp;
 118     struct screen * display=yn->display;
 119     if(message==NULL)
 120         return false;
 121     display->set_viewport(vp);
 122     display->clear_viewport();
 123     put_message(yn->display, message, 0, viewport_get_nb_lines(vp));
 124     display->update_viewport();
 125     display->set_viewport(NULL);
 126     return(true);
 127 }
 128
 129 enum yesno_res gui_syncyesno_run(const struct text_message * main_message,
 130                                  const struct text_message * yes_message,
 131                                  const struct text_message * no_message)
 132 {
 133     int i;
 134     int button;
 135     int result=-1;
 136     bool result_displayed;
 137     struct gui_yesno yn[NB_SCREENS];
 138     struct viewport vp[NB_SCREENS];
 139     long talked_tick = 0;
 140     FOR_NB_SCREENS(i)
 141     {
 142         yn[i].main_message=main_message;
 143         yn[i].result_message[YESNO_YES]=yes_message;
 144         yn[i].result_message[YESNO_NO]=no_message;
 145         yn[i].display=&screens[i];
 146         yn[i].vp = &vp[i];
 147         viewport_set_defaults(yn[i].vp, i);
 148         screens[i].stop_scroll();
 149         gui_yesno_draw(&(yn[i]));
 150     }
 151     while (result==-1)
 152     {
 153         /* Repeat the question every 5secs (more or less) */
 154         if (global_settings.talk_menu
 155             && (talked_tick==0 || TIME_AFTER(current_tick, talked_tick+HZ*5)))
 156         {
 157             talked_tick = current_tick;
 158             talk_text_message(main_message, false);
 159         }
 160         button = get_action(CONTEXT_YESNOSCREEN, HZ*5);
 161         switch (button)
 162         {
 163             case ACTION_YESNO_ACCEPT:
 164                 result=YESNO_YES;
 165                 break;
 166             case ACTION_NONE:
 167             case SYS_CHARGER_DISCONNECTED:
 168                 /* ignore some SYS events that can happen */
 169                 continue;
 170             default:
 171                 if(default_event_handler(button) == SYS_USB_CONNECTED)
 172                     return(YESNO_USB);
 173                 result = YESNO_NO;
 174         }
 175     }
 176
 177     FOR_NB_SCREENS(i)
 178         result_displayed=gui_yesno_draw_result(&(yn[i]), result);
 179
 180     if (global_settings.talk_menu)
 181     {
 182         talk_text_message((result == YESNO_YES) ? yes_message
 183                           : no_message, false);
 184         talk_force_enqueue_next();
 185     }
 186     if(result_displayed)
 187         sleep(HZ);
 188
 189     FOR_NB_SCREENS(i) /* stop scrolling before getting out */
 190         screens[i].scroll_stop(yn[i].vp);
 191     return(result);
 192 }