apps/recorder/widgets.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 Markus Braun
  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 #include <lcd.h>
  20 #include <limits.h>
  21
  22 #include "widgets.h"
  23
  24 #ifdef HAVE_LCD_BITMAP
  25
  26 /*
  27  * Print a scroll bar
  28  */
  29 void scrollbar(int x, int y, int width, int height, int items, int min_shown,
  30                int max_shown, int orientation)
  31 {
  32     int min;
  33     int max;
  34     int inner_len;
  35     int start;
  36     int size;
  37
  38     /* draw box */
  39     lcd_drawrect(x, y, width, height);
  40
  41     lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
  42
  43     /* clear edge pixels */
  44     lcd_drawpixel(x, y);
  45     lcd_drawpixel((x + width - 1), y);
  46     lcd_drawpixel(x, (y + height - 1));
  47     lcd_drawpixel((x + width - 1), (y + height - 1));
  48
  49     /* clear pixels in progress bar */
  50     lcd_fillrect(x + 1, y + 1, width - 2, height - 2);
  51
  52     /* min should be min */
  53     if(min_shown < max_shown) {
  54         min = min_shown;
  55         max = max_shown;
  56     }
  57     else {
  58         min = max_shown;
  59         max = min_shown;
  60     }
  61
  62     /* limit min and max */
  63     if(min < 0)
  64         min = 0;
  65     if(min > items)
  66         min = items;
  67
  68     if(max < 0)
  69         max = 0;
  70     if(max > items)
  71         max = items;
  72
  73     if (orientation == VERTICAL)
  74         inner_len = height - 2;
  75     else
  76         inner_len = width - 2;
  77
  78     /* avoid overflows */
  79     while (items > (INT_MAX / inner_len)) {
  80         items >>= 1;
  81         min >>= 1;
  82         max >>= 1;
  83     }
  84
  85     /* calc start and end of the knob */
  86     if (items > 0 && items > (max - min)) {
  87         size = inner_len * (max - min) / items;
  88         if (size == 0) { /* width of knob is null */
  89             size = 1;
  90             start = (inner_len - 1) * min / items;
  91         } else {
  92             start = (inner_len - size) * min / (items - (max - min));
  93         }
  94     } else {  /* if null draw full bar */
  95         size = inner_len;
  96         start = 0;
  97     }
  98
  99     lcd_set_drawmode(DRMODE_SOLID);
 100
 101     if(orientation == VERTICAL)
 102         lcd_fillrect(x + 1, y + start + 1, width - 2, size);
 103     else
 104         lcd_fillrect(x + start + 1, y + 1, size, height - 2);
 105 }
 106
 107 /*
 108  * Print a checkbox
 109  */
 110 void checkbox(int x, int y, int width, int height, bool checked)
 111 {
 112     /* draw box */
 113     lcd_drawrect(x, y, width, height);
 114
 115     /* clear inner area */
 116     lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
 117     lcd_fillrect(x + 1, y + 1, width - 2, height - 2);
 118     lcd_set_drawmode(DRMODE_SOLID);
 119
 120     if (checked){
 121         lcd_drawline(x + 2, y + 2, x + width - 2 - 1 , y + height - 2 - 1);
 122         lcd_drawline(x + 2, y + height - 2 - 1, x + width - 2 - 1, y + 2);
 123     }
 124 }
 125
 126 #endif