rockbox/apps/plugins/stopwatch.c

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2004 Mike Holden
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

#include "plugin.h"

#ifdef HAVE_LCD_BITMAP
#define LAP_LINES 6
#define TIMER_Y 1
#else
#define LAP_LINES 1
#define TIMER_Y 0
#endif

#define LAP_Y TIMER_Y+1
#define MAX_LAPS 10
#define MAX_SCROLL (MAX_LAPS - LAP_LINES)

static struct plugin_api* rb;

static int stopwatch = 0;
static long start_at = 0;
static int prev_total = 0;
static bool counting = false;
static int curr_lap = 0;
static int lap_scroll = 0;
static int lap_start;
static int lap_times[MAX_LAPS];

static void ticks_to_string(int ticks,int lap,int buflen, char * buf)
{
    int hours, minutes, seconds, cs;

    hours = ticks / (HZ * 3600);
    ticks -= (HZ * hours * 3600);
    minutes = ticks / (HZ * 60);
    ticks -= (HZ * minutes * 60);
    seconds = ticks / HZ;
    ticks -= (HZ * seconds);
    cs = ticks;
    if (!lap)
    {
        rb->snprintf(buf, buflen,
                     "%2d:%02d:%02d.%02d",
                     hours, minutes, seconds, cs);
    }
    else
    {
        rb->snprintf(buf, buflen,
                     "%2d %2d:%02d:%02d.%02d",
                     lap, hours, minutes, seconds, cs);
    }
}

enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
    char buf[32];
    int button;
    int lap;
    int done = false;

    TEST_PLUGIN_API(api);
    (void)parameter;
    rb = api;

#ifdef HAVE_LCD_BITMAP
    rb->lcd_setfont(FONT_UI);
#endif

    rb->lcd_clear_display();

    while (!done)
    {
        if (! counting)
        {
            button = rb->button_get(true);
        }
        else
        {
            button = rb->button_get_w_tmo(10);
        }
        switch (button)
        {

            /* OFF/MENU key to exit */
#ifdef HAVE_RECORDER_KEYPAD
            case BUTTON_OFF:
#else
            case BUTTON_MENU:
#endif
                  done = true;
                  break;

            /* PLAY = Stop/Start toggle */
            case BUTTON_PLAY:
                 counting = ! counting;
                 if (counting)
                 {
                     start_at = *rb->current_tick;
                     stopwatch = prev_total + *rb->current_tick - start_at;
                 }
                 else
                 {
                     prev_total += *rb->current_tick - start_at;
                     stopwatch = prev_total;
                 }
                 break;

            /* LEFT = Reset timer */
#ifdef HAVE_RECORDER_KEYPAD
            case BUTTON_LEFT:
#else
            case BUTTON_STOP:
#endif
                 if (!counting)
                 {
                     prev_total = 0;
                     curr_lap = 0;
                 }
                 break;

            /* ON = Lap timer */
            case BUTTON_ON:
                 lap_times[curr_lap%MAX_LAPS] = stopwatch;
                 curr_lap++;
                 break;

            /* UP (RIGHT/+) = Scroll Lap timer up */
#ifdef HAVE_RECORDER_KEYPAD
            case BUTTON_UP:
#else
            case BUTTON_RIGHT:
#endif
                 if (lap_scroll > 0)
                     lap_scroll --;
                 break;

            /* DOWN (LEFT/-) = Scroll Lap timer down */
#ifdef HAVE_RECORDER_KEYPAD
            case BUTTON_DOWN:
#else
            case BUTTON_LEFT:
#endif
                 if ((lap_scroll < curr_lap - LAP_LINES) &&
                     (lap_scroll < MAX_SCROLL) )
                 {
                     lap_scroll ++;
                 }
                 break;
        }

        if (counting)
        {
            stopwatch = prev_total + *rb->current_tick - start_at;
        }
        else
        {
            stopwatch = prev_total;
        }

        ticks_to_string(stopwatch,0,32,buf);
        rb->lcd_puts(0, TIMER_Y, buf);

        lap_start = MIN(curr_lap, lap_scroll);
        lap_start = curr_lap - lap_scroll;
        for (lap = lap_start; lap > lap_start - LAP_LINES; lap--)
        {
            if (lap > 0)
            {
                ticks_to_string(lap_times[(lap-1)%MAX_LAPS],lap,32,buf);
                rb->lcd_puts(0, LAP_Y + lap_start - lap, buf);
            }
            else
            {
                rb->lcd_puts(0, LAP_Y + lap_start - lap, "                  ");
            }
        }

        rb->lcd_update();
    }
    return true;
}