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+/*
+ Widgets for the Midnight Commander
+
+ Copyright (C) 1994-2023
+ Free Software Foundation, Inc.
+
+ Authors:
+ Radek Doulik, 1994, 1995
+ Miguel de Icaza, 1994, 1995
+ Jakub Jelinek, 1995
+ Andrej Borsenkow, 1996
+ Norbert Warmuth, 1997
+ Andrew Borodin <aborodin@vmail.ru>, 2009-2022
+
+ This file is part of the Midnight Commander.
+
+ The Midnight Commander is free software: you can redistribute it
+ and/or modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ The Midnight Commander is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file gauge.c
+ * \brief Source: WGauge widget (progress indicator)
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "lib/global.h"
+
+#include "lib/tty/tty.h"
+#include "lib/tty/color.h"
+#include "lib/skin.h"
+#include "lib/widget.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** forward declarations (file scope functions) *************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static cb_ret_t
+gauge_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
+{
+ WGauge *g = GAUGE (w);
+ const int *colors;
+
+ switch (msg)
+ {
+ case MSG_DRAW:
+ colors = widget_get_colors (w);
+ widget_gotoyx (w, 0, 0);
+ if (!g->shown)
+ {
+ tty_setcolor (colors[DLG_COLOR_NORMAL]);
+ tty_printf ("%*s", w->rect.cols, "");
+ }
+ else
+ {
+ int gauge_len;
+ int percentage, columns;
+ int total = g->max;
+ int done = g->current;
+
+ if (total <= 0 || done < 0)
+ {
+ done = 0;
+ total = 100;
+ }
+ if (done > total)
+ done = total;
+ while (total > 65535)
+ {
+ total /= 256;
+ done /= 256;
+ }
+
+ gauge_len = w->rect.cols - 7; /* 7 positions for percentage */
+
+ percentage = (200 * done / total + 1) / 2;
+ columns = (2 * gauge_len * done / total + 1) / 2;
+ tty_print_char ('[');
+ if (g->from_left_to_right)
+ {
+ tty_setcolor (GAUGE_COLOR);
+ tty_printf ("%*s", columns, "");
+ tty_setcolor (colors[DLG_COLOR_NORMAL]);
+ tty_printf ("%*s] %3d%%", gauge_len - columns, "", percentage);
+ }
+ else
+ {
+ tty_setcolor (colors[DLG_COLOR_NORMAL]);
+ tty_printf ("%*s", gauge_len - columns, "");
+ tty_setcolor (GAUGE_COLOR);
+ tty_printf ("%*s", columns, "");
+ tty_setcolor (colors[DLG_COLOR_NORMAL]);
+ tty_printf ("] %3d%%", percentage);
+ }
+ }
+ return MSG_HANDLED;
+
+ default:
+ return widget_default_callback (w, sender, msg, parm, data);
+ }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+WGauge *
+gauge_new (int y, int x, int cols, gboolean shown, int max, int current)
+{
+ WRect r = { y, x, 1, cols };
+ WGauge *g;
+ Widget *w;
+
+ g = g_new (WGauge, 1);
+ w = WIDGET (g);
+ widget_init (w, &r, gauge_callback, NULL);
+
+ g->shown = shown;
+ if (max == 0)
+ max = 1; /* I do not like division by zero :) */
+ g->max = max;
+ g->current = current;
+ g->from_left_to_right = TRUE;
+
+ return g;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+gauge_set_value (WGauge * g, int max, int current)
+{
+ if (g->current == current && g->max == max)
+ return; /* Do not flicker */
+
+ if (max == 0)
+ max = 1; /* I do not like division by zero :) */
+ g->current = current;
+ g->max = max;
+ widget_draw (WIDGET (g));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+gauge_show (WGauge * g, gboolean shown)
+{
+ if (g->shown != shown)
+ {
+ g->shown = shown;
+ widget_draw (WIDGET (g));
+ }
+}
+
+/* --------------------------------------------------------------------------------------------- */