qulogic/libgnt

Fix arrow keys
fix-arrow-keys
2019-02-20, Petteri Pitkänen
7ac801527b0b
Fix arrow keys

The key-tree expects that for arrow keys the terminal transmits codes that
are defined in the terminfo database, but these codes are transmitted only
in application mode. To make the arrow key handling portable across
terminals, and to prevent the need for manually translating these codes, put
the terminal into application mode by calling ncurses keypad().

Fixes #12676.
/*
* GNT - The GLib Ncurses Toolkit
*
* GNT is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This library 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "gntinternal.h"
#include "gntprogressbar.h"
#include "gntutils.h"
#include <string.h>
typedef struct _GntProgressBarPrivate
{
gdouble fraction;
gboolean show_value;
GntProgressBarOrientation orientation;
} GntProgressBarPrivate;
struct _GntProgressBar
{
GntWidget parent;
};
G_DEFINE_TYPE_WITH_PRIVATE (GntProgressBar, gnt_progress_bar, GNT_TYPE_WIDGET);
static void
gnt_progress_bar_draw (GntWidget *widget)
{
GntProgressBarPrivate *priv = gnt_progress_bar_get_instance_private (
GNT_PROGRESS_BAR (widget));
gchar progress[8];
gint start, end, i, pos;
int color;
g_snprintf (progress, sizeof (progress), "%.1f%%", priv->fraction * 100);
color = gnt_color_pair(GNT_COLOR_NORMAL);
switch (priv->orientation) {
case GNT_PROGRESS_LEFT_TO_RIGHT:
case GNT_PROGRESS_RIGHT_TO_LEFT:
start = (priv->orientation == GNT_PROGRESS_LEFT_TO_RIGHT ? 0 : (1.0 - priv->fraction) * widget->priv.width);
end = (priv->orientation == GNT_PROGRESS_LEFT_TO_RIGHT ? widget->priv.width * priv->fraction : widget->priv.width);
/* background */
for (i = 0; i < widget->priv.height; i++)
mvwhline (widget->window, i, 0, ' ' | color, widget->priv.width);
/* foreground */
for (i = 0; i < widget->priv.height; i++)
mvwhline (widget->window, i, start, ACS_CKBOARD | color | A_REVERSE, end);
/* text */
if (priv->show_value) {
pos = widget->priv.width / 2 - strlen (progress) / 2;
for (i = 0; i < progress[i]; i++, pos++) {
wattrset (widget->window, color | ((pos < start || pos > end) ? A_NORMAL : A_REVERSE));
mvwprintw (widget->window, widget->priv.height / 2, pos, "%c", progress[i]);
}
wattrset (widget->window, color);
}
break;
case GNT_PROGRESS_TOP_TO_BOTTOM:
case GNT_PROGRESS_BOTTOM_TO_TOP:
start = (priv->orientation == GNT_PROGRESS_TOP_TO_BOTTOM ? 0 : (1.0 - priv->fraction) * widget->priv.height);
end = (priv->orientation == GNT_PROGRESS_TOP_TO_BOTTOM ? widget->priv.height * priv->fraction : widget->priv.height);
/* background */
for (i = 0; i < widget->priv.width; i++)
mvwvline (widget->window, 0, i, ' ' | color, widget->priv.height);
/* foreground */
for (i = 0; i < widget->priv.width; i++)
mvwvline (widget->window, start, i, ACS_CKBOARD | color | A_REVERSE, end);
/* text */
if (priv->show_value) {
pos = widget->priv.height / 2 - strlen (progress) / 2;
for (i = 0; i < progress[i]; i++, pos++) {
wattrset (widget->window, color | ((pos < start || pos > end) ? A_NORMAL : A_REVERSE));
mvwprintw (widget->window, pos, widget->priv.width / 2, "%c\n", progress[i]);
}
wattrset (widget->window, color);
}
break;
default:
g_assert_not_reached ();
}
}
static void
gnt_progress_bar_size_request (GntWidget *widget)
{
gnt_widget_set_size (widget, widget->priv.minw, widget->priv.minh);
}
static void
gnt_progress_bar_class_init (GntProgressBarClass *klass)
{
GntWidgetClass *wclass = GNT_WIDGET_CLASS(klass);
wclass->draw = gnt_progress_bar_draw;
wclass->size_request = gnt_progress_bar_size_request;
}
static void
gnt_progress_bar_init (GntProgressBar *progress_bar)
{
GntWidget *widget = GNT_WIDGET (progress_bar);
GntProgressBarPrivate *priv =
gnt_progress_bar_get_instance_private (progress_bar);
gnt_widget_set_take_focus (widget, FALSE);
GNT_WIDGET_SET_FLAGS (widget, GNT_WIDGET_NO_BORDER | GNT_WIDGET_NO_SHADOW | GNT_WIDGET_GROW_X);
widget->priv.minw = 8;
widget->priv.minh = 1;
priv->show_value = TRUE;
}
GntWidget *
gnt_progress_bar_new (void)
{
GntWidget *widget = g_object_new (GNT_TYPE_PROGRESS_BAR, NULL);
return widget;
}
void
gnt_progress_bar_set_fraction (GntProgressBar *pbar, gdouble fraction)
{
GntProgressBarPrivate *priv =
gnt_progress_bar_get_instance_private (pbar);
if (fraction > 1.0)
priv->fraction = 1.0;
else if (fraction < 0.0)
priv->fraction = 0.0;
else
priv->fraction = fraction;
if ((GNT_WIDGET_FLAGS(pbar) & GNT_WIDGET_MAPPED))
gnt_widget_draw(GNT_WIDGET(pbar));
}
void
gnt_progress_bar_set_orientation (GntProgressBar *pbar,
GntProgressBarOrientation orientation)
{
GntProgressBarPrivate *priv =
gnt_progress_bar_get_instance_private (pbar);
GntWidget *widget = GNT_WIDGET(pbar);
priv->orientation = orientation;
if (orientation == GNT_PROGRESS_LEFT_TO_RIGHT ||
orientation == GNT_PROGRESS_RIGHT_TO_LEFT) {
GNT_WIDGET_SET_FLAGS(pbar, GNT_WIDGET_GROW_X);
GNT_WIDGET_UNSET_FLAGS(pbar, GNT_WIDGET_GROW_Y);
widget->priv.minw = 8;
widget->priv.minh = 1;
} else {
GNT_WIDGET_UNSET_FLAGS(pbar, GNT_WIDGET_GROW_X);
GNT_WIDGET_SET_FLAGS(pbar, GNT_WIDGET_GROW_Y);
widget->priv.minw = 1;
widget->priv.minh = 8;
}
if ((GNT_WIDGET_FLAGS(pbar) & GNT_WIDGET_MAPPED))
gnt_widget_draw(GNT_WIDGET(pbar));
}
void
gnt_progress_bar_set_show_progress (GntProgressBar *pbar, gboolean show)
{
GntProgressBarPrivate *priv =
gnt_progress_bar_get_instance_private (pbar);
priv->show_value = show;
}
gdouble
gnt_progress_bar_get_fraction (GntProgressBar *pbar)
{
GntProgressBarPrivate *priv =
gnt_progress_bar_get_instance_private (pbar);
return priv->fraction;
}
GntProgressBarOrientation
gnt_progress_bar_get_orientation (GntProgressBar *pbar)
{
GntProgressBarPrivate *priv =
gnt_progress_bar_get_instance_private (pbar);
return priv->orientation;
}
gboolean
gnt_progress_bar_get_show_progress (GntProgressBar *pbar)
{
GntProgressBarPrivate *priv =
gnt_progress_bar_get_instance_private (pbar);
return priv->show_value;
}