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/* vi:set sw=2 sts=2 ts=2 et ai tw=100: */
/*-
* Copyright (c) 2017 Viktor Odintsev <zakhams@gmail.com>
*
* This program 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., Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include "range-debouncer.h"
struct _RangeDebouncerClass
{
GObjectClass __parent__;
};
struct _RangeDebouncer
{
GObject __parent__;
GtkRange *range;
gboolean pressed : 1;
gulong signal1;
gulong signal2;
gulong signal3;
};
enum
{
PROP_0,
PROP_VALUE,
N_PROPERTIES,
};
static void range_debouncer_finalize (GObject *object);
static void range_debouncer_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void range_debouncer_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void range_debouncer_weak_notify (RangeDebouncer *range_debouncer,
GObject *object);
static void range_debouncer_value_changed (RangeDebouncer *range_debouncer);
static gboolean range_debouncer_button_pressed (RangeDebouncer *range_debouncer);
static gboolean range_debouncer_button_released (RangeDebouncer *range_debouncer);
G_DEFINE_TYPE (RangeDebouncer, range_debouncer, G_TYPE_OBJECT)
static void
range_debouncer_class_init (RangeDebouncerClass *klass)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = range_debouncer_finalize;
gobject_class->get_property = range_debouncer_get_property;
gobject_class->set_property = range_debouncer_set_property;
g_object_class_install_property (gobject_class, PROP_VALUE,
g_param_spec_double ("value", NULL, NULL,
-G_MAXDOUBLE, G_MAXDOUBLE, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
range_debouncer_init (RangeDebouncer *range_debouncer)
{
range_debouncer->range = NULL;
range_debouncer->pressed = FALSE;
range_debouncer->signal1 = 0;
range_debouncer->signal2 = 0;
range_debouncer->signal3 = 0;
}
RangeDebouncer *
range_debouncer_bind (GtkRange *range)
{
RangeDebouncer *range_debouncer;
g_return_val_if_fail (GTK_IS_RANGE (range), NULL);
range_debouncer = g_object_new (TYPE_RANGE_DEBOUNCER, NULL);
range_debouncer->range = range;
/* RangeDebouncer will be destroyed with GtkRange */
g_object_weak_ref (G_OBJECT (range), (GWeakNotify)range_debouncer_weak_notify, range_debouncer);
range_debouncer->signal1 =
g_signal_connect_swapped (range, "value-changed",
G_CALLBACK (range_debouncer_value_changed), range_debouncer);
range_debouncer->signal2 =
g_signal_connect_swapped (range, "button-press-event",
G_CALLBACK (range_debouncer_button_pressed), range_debouncer);
range_debouncer->signal3 =
g_signal_connect_swapped (range, "button-release-event",
G_CALLBACK (range_debouncer_button_released), range_debouncer);
return range_debouncer;
}
static void
range_debouncer_finalize (GObject *object)
{
RangeDebouncer *range_debouncer = RANGE_DEBOUNCER (object);
if (G_UNLIKELY (range_debouncer->range != NULL))
{
g_signal_handler_disconnect(range_debouncer->range, range_debouncer->signal1);
g_signal_handler_disconnect(range_debouncer->range, range_debouncer->signal2);
g_signal_handler_disconnect(range_debouncer->range, range_debouncer->signal3);
}
G_OBJECT_CLASS (range_debouncer_parent_class)->finalize (object);
}
static void
range_debouncer_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
RangeDebouncer *range_debouncer = RANGE_DEBOUNCER (object);
switch (prop_id)
{
case PROP_VALUE:
if (G_LIKELY (range_debouncer->range != NULL))
g_value_set_double (value, gtk_range_get_value (range_debouncer->range));
else
g_value_set_double (value, 0);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
range_debouncer_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
RangeDebouncer *range_debouncer = RANGE_DEBOUNCER (object);
gdouble val_double;
switch (prop_id)
{
case PROP_VALUE:
val_double = g_value_get_double (value);
if (G_LIKELY (range_debouncer->range != NULL) &&
gtk_range_get_value (range_debouncer->range) != val_double)
{
gtk_range_set_value (range_debouncer->range, val_double);
g_object_notify (object, "value");
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
range_debouncer_weak_notify (RangeDebouncer *range_debouncer, GObject *object)
{
range_debouncer->range = NULL;
g_object_unref (range_debouncer);
}
static void
range_debouncer_value_changed (RangeDebouncer *range_debouncer)
{
if (!range_debouncer->pressed)
g_object_notify (G_OBJECT (range_debouncer), "value");
}
static gboolean
range_debouncer_button_pressed (RangeDebouncer *range_debouncer)
{
range_debouncer->pressed = TRUE;
return FALSE;
}
static gboolean
range_debouncer_button_released (RangeDebouncer *range_debouncer)
{
range_debouncer->pressed = FALSE;
g_object_notify (G_OBJECT (range_debouncer), "value");
return FALSE;
}
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