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 "gntline.h"
enum
{
PROP_0,
PROP_VERTICAL
};
enum
{
SIGS = 1,
};
static GntWidgetClass *parent_class = NULL;
static void
gnt_line_draw(GntWidget *widget)
{
GntLine *line = GNT_LINE(widget);
if (line->vertical)
mvwvline(widget->window, 1, 0, ACS_VLINE | gnt_color_pair(GNT_COLOR_NORMAL),
widget->priv.height - 2);
else
mvwhline(widget->window, 0, 1, ACS_HLINE | gnt_color_pair(GNT_COLOR_NORMAL),
widget->priv.width - 2);
}
static void
gnt_line_size_request(GntWidget *widget)
{
if (GNT_LINE(widget)->vertical)
{
widget->priv.width = 1;
widget->priv.height = 5;
}
else
{
widget->priv.width = 5;
widget->priv.height = 1;
}
}
static void
gnt_line_map(GntWidget *widget)
{
if (widget->priv.width == 0 || widget->priv.height == 0)
gnt_widget_size_request(widget);
GNTDEBUG;
}
static void
gnt_line_set_property(GObject *obj, guint prop_id, const GValue *value,
GParamSpec *spec)
{
GntLine *line = GNT_LINE(obj);
switch (prop_id) {
case PROP_VERTICAL:
line->vertical = g_value_get_boolean(value);
if (line->vertical) {
GNT_WIDGET_SET_FLAGS(line, GNT_WIDGET_GROW_Y);
} else {
GNT_WIDGET_SET_FLAGS(line, GNT_WIDGET_GROW_X);
}
break;
default:
break;
}
}
static void
gnt_line_get_property(GObject *obj, guint prop_id, GValue *value,
GParamSpec *spec)
{
GntLine *line = GNT_LINE(obj);
switch (prop_id) {
case PROP_VERTICAL:
g_value_set_boolean(value, line->vertical);
break;
default:
break;
}
}
static void
gnt_line_class_init(GntLineClass *klass)
{
GObjectClass *gclass = G_OBJECT_CLASS(klass);
parent_class = GNT_WIDGET_CLASS(klass);
parent_class->draw = gnt_line_draw;
parent_class->map = gnt_line_map;
parent_class->size_request = gnt_line_size_request;
gclass->set_property = gnt_line_set_property;
gclass->get_property = gnt_line_get_property;
g_object_class_install_property(gclass,
PROP_VERTICAL,
g_param_spec_boolean("vertical", "Vertical",
"Whether it's a vertical line or a horizontal one.",
TRUE,
G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS
)
);
}
static void
gnt_line_init(GTypeInstance *instance, gpointer class)
{
GntWidget *widget = GNT_WIDGET(instance);
GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_NO_SHADOW | GNT_WIDGET_NO_BORDER);
widget->priv.minw = 1;
widget->priv.minh = 1;
GNTDEBUG;
}
/******************************************************************************
* GntLine API
*****************************************************************************/
GType
gnt_line_get_type(void)
{
static GType type = 0;
if(type == 0)
{
static const GTypeInfo info = {
sizeof(GntLineClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc)gnt_line_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof(GntLine),
0, /* n_preallocs */
gnt_line_init, /* instance_init */
NULL /* value_table */
};
type = g_type_register_static(GNT_TYPE_WIDGET,
"GntLine",
&info, 0);
}
return type;
}
GntWidget *gnt_line_new(gboolean vertical)
{
GntWidget *widget = g_object_new(GNT_TYPE_LINE, "vertical", vertical, NULL);
return widget;
}