lib/widget/gauge.c

   1 /*
   2    Widgets for the Midnight Commander
   3
   4    Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
   5    2004, 2005, 2006, 2007, 2009, 2010, 2011
   6    The Free Software Foundation, Inc.
   7
   8    Authors:
   9    Radek Doulik, 1994, 1995
  10    Miguel de Icaza, 1994, 1995
  11    Jakub Jelinek, 1995
  12    Andrej Borsenkow, 1996
  13    Norbert Warmuth, 1997
  14    Andrew Borodin <aborodin@vmail.ru>, 2009, 2010
  15
  16    This file is part of the Midnight Commander.
  17
  18    The Midnight Commander is free software: you can redistribute it
  19    and/or modify it under the terms of the GNU General Public License as
  20    published by the Free Software Foundation, either version 3 of the License,
  21    or (at your option) any later version.
  22
  23    The Midnight Commander is distributed in the hope that it will be useful,
  24    but WITHOUT ANY WARRANTY; without even the implied warranty of
  25    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26    GNU General Public License for more details.
  27
  28    You should have received a copy of the GNU General Public License
  29    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  30  */
  31
  32 /** \file gauge.c
  33  *  \brief Source: WGauge widget (progress indicator)
  34  */
  35
  36 #include <config.h>
  37
  38 #include <stdlib.h>
  39 #include <string.h>
  40
  41 #include "lib/global.h"
  42
  43 #include "lib/tty/tty.h"
  44 #include "lib/tty/color.h"
  45 #include "lib/skin.h"
  46 #include "lib/widget.h"
  47
  48 /*** global variables ****************************************************************************/
  49
  50 /*** file scope macro definitions ****************************************************************/
  51
  52 /* Currently width is hardcoded here for text mode */
  53 #define gauge_len 47
  54
  55 /*** file scope type declarations ****************************************************************/
  56
  57 /*** file scope variables ************************************************************************/
  58
  59 /*** file scope functions ************************************************************************/
  60
  61 static cb_ret_t
  62 gauge_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
  63 {
  64     WGauge *g = (WGauge *) w;
  65     Dlg_head *h = w->owner;
  66
  67     if (msg == WIDGET_INIT)
  68         return MSG_HANDLED;
  69
  70     /* We don't want to get the focus */
  71     if (msg == WIDGET_FOCUS)
  72         return MSG_NOT_HANDLED;
  73
  74     if (msg == WIDGET_DRAW)
  75     {
  76         widget_move (w, 0, 0);
  77         tty_setcolor (h->color[DLG_COLOR_NORMAL]);
  78         if (!g->shown)
  79             tty_printf ("%*s", gauge_len, "");
  80         else
  81         {
  82             int percentage, columns;
  83             long total = g->max;
  84             long done = g->current;
  85
  86             if (total <= 0 || done < 0)
  87             {
  88                 done = 0;
  89                 total = 100;
  90             }
  91             if (done > total)
  92                 done = total;
  93             while (total > 65535)
  94             {
  95                 total /= 256;
  96                 done /= 256;
  97             }
  98             percentage = (200 * done / total + 1) / 2;
  99             columns = (2 * (gauge_len - 7) * done / total + 1) / 2;
 100             tty_print_char ('[');
 101             if (g->from_left_to_right)
 102             {
 103                 tty_setcolor (GAUGE_COLOR);
 104                 tty_printf ("%*s", (int) columns, "");
 105                 tty_setcolor (h->color[DLG_COLOR_NORMAL]);
 106                 tty_printf ("%*s] %3d%%", (int) (gauge_len - 7 - columns), "", (int) percentage);
 107             }
 108             else
 109             {
 110                 tty_setcolor (h->color[DLG_COLOR_NORMAL]);
 111                 tty_printf ("%*s", gauge_len - columns - 7, "");
 112                 tty_setcolor (GAUGE_COLOR);
 113                 tty_printf ("%*s", columns, "");
 114                 tty_setcolor (h->color[DLG_COLOR_NORMAL]);
 115                 tty_printf ("] %3d%%", 100 * columns / (gauge_len - 7), percentage);
 116             }
 117         }
 118         return MSG_HANDLED;
 119     }
 120
 121     return default_widget_callback (sender, msg, parm, data);
 122 }
 123
 124 /* --------------------------------------------------------------------------------------------- */
 125 /*** public functions ****************************************************************************/
 126 /* --------------------------------------------------------------------------------------------- */
 127
 128 WGauge *
 129 gauge_new (int y, int x, gboolean shown, int max, int current)
 130 {
 131     WGauge *g;
 132     Widget *w;
 133
 134     g = g_new (WGauge, 1);
 135     w = WIDGET (g);
 136     init_widget (w, y, x, 1, gauge_len, gauge_callback, NULL);
 137
 138     g->shown = shown;
 139     if (max == 0)
 140         max = 1;                /* I do not like division by zero :) */
 141     g->max = max;
 142     g->current = current;
 143     g->from_left_to_right = TRUE;
 144
 145     widget_want_cursor (w, FALSE);
 146     widget_want_hotkey (w, FALSE);
 147
 148     return g;
 149 }
 150
 151 /* --------------------------------------------------------------------------------------------- */
 152
 153 void
 154 gauge_set_value (WGauge * g, int max, int current)
 155 {
 156     if (g->current == current && g->max == max)
 157         return;                 /* Do not flicker */
 158
 159     if (max == 0)
 160         max = 1;                /* I do not like division by zero :) */
 161     g->current = current;
 162     g->max = max;
 163     gauge_callback (WIDGET (g), NULL, WIDGET_DRAW, 0, NULL);
 164 }
 165
 166 /* --------------------------------------------------------------------------------------------- */
 167
 168 void
 169 gauge_show (WGauge * g, gboolean shown)
 170 {
 171     if (g->shown != shown)
 172     {
 173         g->shown = shown;
 174         gauge_callback (WIDGET (g), NULL, WIDGET_DRAW, 0, NULL);
 175     }
 176 }
 177
 178 /* --------------------------------------------------------------------------------------------- */