lib/widget/gauge.c

   1 /* Widgets for the Midnight Commander
   2
   3    Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
   4    2004, 2005, 2006, 2007, 2009, 2010 Free Software Foundation, Inc.
   5
   6    Authors: 1994, 1995 Radek Doulik
   7    1994, 1995 Miguel de Icaza
   8    1995 Jakub Jelinek
   9    1996 Andrej Borsenkow
  10    1997 Norbert Warmuth
  11    2009, 2010 Andrew Borodin
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  26
  27  */
  28
  29 /** \file gauge.c
  30  *  \brief Source: WGauge widget (progress indicator)
  31  */
  32
  33 #include <config.h>
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #include "lib/global.h"
  39
  40 #include "lib/tty/tty.h"
  41 #include "lib/tty/color.h"
  42 #include "lib/skin.h"
  43 #include "lib/widget.h"
  44
  45 /*** global variables ****************************************************************************/
  46
  47 /*** file scope macro definitions ****************************************************************/
  48
  49 /* Currently width is hardcoded here for text mode */
  50 #define gauge_len 47
  51
  52 /*** file scope type declarations ****************************************************************/
  53
  54 /*** file scope variables ************************************************************************/
  55
  56 /*** file scope functions ************************************************************************/
  57
  58 static cb_ret_t
  59 gauge_callback (Widget * w, widget_msg_t msg, int parm)
  60 {
  61     WGauge *g = (WGauge *) w;
  62     Dlg_head *h = g->widget.owner;
  63
  64     if (msg == WIDGET_INIT)
  65         return MSG_HANDLED;
  66
  67     /* We don't want to get the focus */
  68     if (msg == WIDGET_FOCUS)
  69         return MSG_NOT_HANDLED;
  70
  71     if (msg == WIDGET_DRAW)
  72     {
  73         widget_move (&g->widget, 0, 0);
  74         tty_setcolor (h->color[DLG_COLOR_NORMAL]);
  75         if (!g->shown)
  76             tty_printf ("%*s", gauge_len, "");
  77         else
  78         {
  79             int percentage, columns;
  80             long total = g->max;
  81             long done = g->current;
  82
  83             if (total <= 0 || done < 0)
  84             {
  85                 done = 0;
  86                 total = 100;
  87             }
  88             if (done > total)
  89                 done = total;
  90             while (total > 65535)
  91             {
  92                 total /= 256;
  93                 done /= 256;
  94             }
  95             percentage = (200 * done / total + 1) / 2;
  96             columns = (2 * (gauge_len - 7) * done / total + 1) / 2;
  97             tty_print_char ('[');
  98             if (g->from_left_to_right)
  99             {
 100                 tty_setcolor (GAUGE_COLOR);
 101                 tty_printf ("%*s", (int) columns, "");
 102                 tty_setcolor (h->color[DLG_COLOR_NORMAL]);
 103                 tty_printf ("%*s] %3d%%", (int) (gauge_len - 7 - columns), "", (int) percentage);
 104             }
 105             else
 106             {
 107                 tty_setcolor (h->color[DLG_COLOR_NORMAL]);
 108                 tty_printf ("%*s", gauge_len - columns - 7, "");
 109                 tty_setcolor (GAUGE_COLOR);
 110                 tty_printf ("%*s", columns, "");
 111                 tty_setcolor (h->color[DLG_COLOR_NORMAL]);
 112                 tty_printf ("] %3d%%", 100 * columns / (gauge_len - 7), percentage);
 113             }
 114         }
 115         return MSG_HANDLED;
 116     }
 117
 118     return default_proc (msg, parm);
 119 }
 120
 121 /* --------------------------------------------------------------------------------------------- */
 122 /*** public functions ****************************************************************************/
 123 /* --------------------------------------------------------------------------------------------- */
 124
 125 WGauge *
 126 gauge_new (int y, int x, gboolean shown, int max, int current)
 127 {
 128     WGauge *g;
 129
 130     g = g_new (WGauge, 1);
 131     init_widget (&g->widget, y, x, 1, gauge_len, gauge_callback, NULL);
 132
 133     g->shown = shown;
 134     if (max == 0)
 135         max = 1;                /* I do not like division by zero :) */
 136     g->max = max;
 137     g->current = current;
 138     g->from_left_to_right = TRUE;
 139
 140     widget_want_cursor (g->widget, FALSE);
 141     widget_want_hotkey (g->widget, FALSE);
 142
 143     return g;
 144 }
 145
 146 /* --------------------------------------------------------------------------------------------- */
 147
 148 void
 149 gauge_set_value (WGauge * g, int max, int current)
 150 {
 151     if (g->current == current && g->max == max)
 152         return;                 /* Do not flicker */
 153
 154     if (max == 0)
 155         max = 1;                /* I do not like division by zero :) */
 156     g->current = current;
 157     g->max = max;
 158     gauge_callback ((Widget *) g, WIDGET_DRAW, 0);
 159 }
 160
 161 /* --------------------------------------------------------------------------------------------- */
 162
 163 void
 164 gauge_show (WGauge * g, gboolean shown)
 165 {
 166     if (g->shown != shown)
 167     {
 168         g->shown = shown;
 169         gauge_callback ((Widget *) g, WIDGET_DRAW, 0);
 170     }
 171 }
 172
 173 /* --------------------------------------------------------------------------------------------- */