/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
*
* Copyright (C) 2008 William Jon McCann
* Copyright (C) 2014 Michal Ratajsky <michal.ratajsky@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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <glib.h>
#include <glib/gi18n.h>
#include <glib-object.h>
#include <gtk/gtk.h>
#include <canberra-gtk.h>
#include <libmatemixer/matemixer.h>
#include "gvc-balance-bar.h"
#define BALANCE_BAR_STYLE \
"style \"balance-bar-scale-style\" {\n" \
" GtkScale::trough-side-details = 0\n" \
"}\n" \
"widget \"*.balance-bar-scale\" style : rc \"balance-bar-scale-style\"\n"
#define SCALE_SIZE 128
#define GVC_BALANCE_BAR_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GVC_TYPE_BALANCE_BAR, GvcBalanceBarPrivate))
struct _GvcBalanceBarPrivate
{
GvcBalanceType btype;
GtkWidget *scale_box;
GtkWidget *start_box;
GtkWidget *end_box;
GtkWidget *label;
GtkWidget *scale;
GtkAdjustment *adjustment;
GtkSizeGroup *size_group;
gboolean symmetric;
MateMixerStreamControl *control;
gint lfe_channel;
};
enum
{
PROP_0,
PROP_CONTROL,
PROP_BALANCE_TYPE,
N_PROPERTIES
};
static GParamSpec *properties[N_PROPERTIES] = { NULL, };
static void gvc_balance_bar_class_init (GvcBalanceBarClass *klass);
static void gvc_balance_bar_init (GvcBalanceBar *balance_bar);
static void gvc_balance_bar_dispose (GObject *object);
static gboolean on_scale_scroll_event (GtkWidget *widget,
GdkEventScroll *event,
GvcBalanceBar *bar);
static void on_adjustment_value_changed (GtkAdjustment *adjustment,
GvcBalanceBar *bar);
G_DEFINE_TYPE (GvcBalanceBar, gvc_balance_bar, GTK_TYPE_BOX)
static void
create_scale_box (GvcBalanceBar *bar)
{
bar->priv->scale_box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
bar->priv->start_box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
bar->priv->end_box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
bar->priv->scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL,
bar->priv->adjustment);
/* Balance and fade scales do not have an origin */
if (bar->priv->btype != BALANCE_TYPE_LFE)
gtk_scale_set_has_origin (GTK_SCALE (bar->priv->scale), FALSE);
gtk_widget_set_size_request (bar->priv->scale, SCALE_SIZE, -1);
gtk_box_pack_start (GTK_BOX (bar->priv->scale_box),
bar->priv->start_box,
FALSE, FALSE, 0);
gtk_box_pack_start (GTK_BOX (bar->priv->start_box),
bar->priv->label,
FALSE, FALSE, 0);
gtk_box_pack_start (GTK_BOX (bar->priv->scale_box),
bar->priv->scale,
TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (bar->priv->scale_box),
bar->priv->end_box,
FALSE, FALSE, 0);
ca_gtk_widget_disable_sounds (bar->priv->scale, FALSE);
gtk_widget_add_events (bar->priv->scale, GDK_SCROLL_MASK);
g_signal_connect (G_OBJECT (bar->priv->scale),
"scroll-event",
G_CALLBACK (on_scale_scroll_event),
bar);
if (bar->priv->size_group != NULL) {
gtk_size_group_add_widget (bar->priv->size_group,
bar->priv->start_box);
if (bar->priv->symmetric)
gtk_size_group_add_widget (bar->priv->size_group,
bar->priv->end_box);
}
gtk_scale_set_draw_value (GTK_SCALE (bar->priv->scale), FALSE);
}
static void
update_scale_marks (GvcBalanceBar *bar)
{
gchar *str_lower = NULL,
*str_upper = NULL;
gdouble lower,
upper;
gtk_scale_clear_marks (GTK_SCALE (bar->priv->scale));
switch (bar->priv->btype) {
case BALANCE_TYPE_RL:
str_lower = g_strdup_printf ("<small>%s</small>", C_("balance", "Left"));
str_upper = g_strdup_printf ("<small>%s</small>", C_("balance", "Right"));
break;
case BALANCE_TYPE_FR:
str_lower = g_strdup_printf ("<small>%s</small>", C_("balance", "Rear"));
str_upper = g_strdup_printf ("<small>%s</small>", C_("balance", "Front"));
break;
case BALANCE_TYPE_LFE:
str_lower = g_strdup_printf ("<small>%s</small>", C_("balance", "Minimum"));
str_upper = g_strdup_printf ("<small>%s</small>", C_("balance", "Maximum"));
break;
}
lower = gtk_adjustment_get_lower (bar->priv->adjustment);
gtk_scale_add_mark (GTK_SCALE (bar->priv->scale),
lower,
GTK_POS_BOTTOM,
str_lower);
upper = gtk_adjustment_get_upper (bar->priv->adjustment);
gtk_scale_add_mark (GTK_SCALE (bar->priv->scale),
upper,
GTK_POS_BOTTOM,
str_upper);
g_free (str_lower);
g_free (str_upper);
if (bar->priv->btype != BALANCE_TYPE_LFE)
gtk_scale_add_mark (GTK_SCALE (bar->priv->scale),
(upper - lower) / 2 + lower,
GTK_POS_BOTTOM,
NULL);
}
void
gvc_balance_bar_set_size_group (GvcBalanceBar *bar,
GtkSizeGroup *group,
gboolean symmetric)
{
g_return_if_fail (GVC_IS_BALANCE_BAR (bar));
g_return_if_fail (GTK_IS_SIZE_GROUP (group));
bar->priv->size_group = group;
bar->priv->symmetric = symmetric;
if (bar->priv->size_group != NULL) {
gtk_size_group_add_widget (bar->priv->size_group,
bar->priv->start_box);
if (bar->priv->symmetric)
gtk_size_group_add_widget (bar->priv->size_group,
bar->priv->end_box);
}
gtk_widget_queue_draw (GTK_WIDGET (bar));
}
static void
update_balance_value (GvcBalanceBar *bar)
{
gdouble value = 0;
switch (bar->priv->btype) {
case BALANCE_TYPE_RL:
value = mate_mixer_stream_control_get_balance (bar->priv->control);
g_debug ("Balance value changed to %.2f", value);
break;
case BALANCE_TYPE_FR:
value = mate_mixer_stream_control_get_fade (bar->priv->control);
g_debug ("Fade value changed to %.2f", value);
break;
case BALANCE_TYPE_LFE:
value = mate_mixer_stream_control_get_channel_volume (bar->priv->control,
bar->priv->lfe_channel);
g_debug ("Subwoofer volume changed to %.0f", value);
break;
}
gtk_adjustment_set_value (bar->priv->adjustment, value);
}
static void
on_balance_value_changed (MateMixerStream *stream,
GParamSpec *pspec,
GvcBalanceBar *bar)
{
update_balance_value (bar);
}
static gint
find_stream_lfe_channel (MateMixerStreamControl *control)
{
guint i;
for (i = 0; i < mate_mixer_stream_control_get_num_channels (control); i++) {
MateMixerChannelPosition position;
position = mate_mixer_stream_control_get_channel_position (control, i);
if (position == MATE_MIXER_CHANNEL_LFE)
return i;
}
return -1;
}
static void
gvc_balance_bar_set_control (GvcBalanceBar *bar, MateMixerStreamControl *control)
{
g_return_if_fail (GVC_BALANCE_BAR (bar));
g_return_if_fail (MATE_MIXER_IS_STREAM_CONTROL (control));
if (bar->priv->control != NULL) {
g_signal_handlers_disconnect_by_func (G_OBJECT (bar->priv->control),
on_balance_value_changed,
bar);
g_object_unref (bar->priv->control);
}
bar->priv->control = g_object_ref (control);
if (bar->priv->btype == BALANCE_TYPE_LFE) {
gdouble minimum;
gdouble maximum;
minimum = mate_mixer_stream_control_get_min_volume (bar->priv->control);
maximum = mate_mixer_stream_control_get_normal_volume (bar->priv->control);
/* Configure the adjustment for the volume limits of the current
* stream.
* Only subwoofer scale uses volume, balance and fade use fixed
* limits which do not need to be updated as balance type is
* only set during construction. */
gtk_adjustment_configure (GTK_ADJUSTMENT (bar->priv->adjustment),
gtk_adjustment_get_value (bar->priv->adjustment),
minimum,
maximum,
(maximum - minimum) / 100.0,
(maximum - minimum) / 10.0,
0.0);
bar->priv->lfe_channel = find_stream_lfe_channel (bar->priv->control);
if (G_LIKELY (bar->priv->lfe_channel > -1))
g_debug ("Found LFE channel at position %d", bar->priv->lfe_channel);
else
g_warn_if_reached ();
} else
bar->priv->lfe_channel = -1;
switch (bar->priv->btype) {
case BALANCE_TYPE_RL:
g_signal_connect (G_OBJECT (bar->priv->control),
"notify::balance",
G_CALLBACK (on_balance_value_changed),
bar);
break;
case BALANCE_TYPE_FR:
g_signal_connect (G_OBJECT (bar->priv->control),
"notify::fade",
G_CALLBACK (on_balance_value_changed),
bar);
break;
case BALANCE_TYPE_LFE:
g_signal_connect (G_OBJECT (bar->priv->control),
"notify::volume",
G_CALLBACK (on_balance_value_changed),
bar);
break;
}
update_balance_value (bar);
update_scale_marks (bar);
g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_CONTROL]);
}
static void
gvc_balance_bar_set_balance_type (GvcBalanceBar *bar, GvcBalanceType btype)
{
GtkWidget *frame;
GtkAdjustment *adjustment;
/* Create adjustment with limits for balance and fade types because
* some limits must be provided.
* If subwoofer type is used instead, the limits will be changed when
* stream is set. */
adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, -1.0, 1.0, 0.05, 0.5, 0.0));
bar->priv->btype = btype;
bar->priv->adjustment = GTK_ADJUSTMENT (g_object_ref_sink (adjustment));
g_signal_connect (G_OBJECT (adjustment),
"value-changed",
G_CALLBACK (on_adjustment_value_changed),
bar);
switch (btype) {
case BALANCE_TYPE_RL:
bar->priv->label = gtk_label_new_with_mnemonic (_("_Balance:"));
break;
case BALANCE_TYPE_FR:
bar->priv->label = gtk_label_new_with_mnemonic (_("_Fade:"));
break;
case BALANCE_TYPE_LFE:
bar->priv->label = gtk_label_new_with_mnemonic (_("_Subwoofer:"));
break;
}
gtk_label_set_xalign (GTK_LABEL (bar->priv->label), 0.0);
gtk_label_set_yalign (GTK_LABEL (bar->priv->label), 0.0);
/* Frame */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_NONE);
gtk_box_pack_start (GTK_BOX (bar), frame, TRUE, TRUE, 0);
/* Box with scale */
create_scale_box (bar);
gtk_container_add (GTK_CONTAINER (frame), bar->priv->scale_box);
gtk_label_set_mnemonic_widget (GTK_LABEL (bar->priv->label),
bar->priv->scale);
gtk_widget_set_direction (bar->priv->scale, GTK_TEXT_DIR_LTR);
gtk_widget_show_all (frame);
g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_BALANCE_TYPE]);
}
static void
gvc_balance_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GvcBalanceBar *self = GVC_BALANCE_BAR (object);
switch (prop_id) {
case PROP_CONTROL:
gvc_balance_bar_set_control (self, g_value_get_object (value));
break;
case PROP_BALANCE_TYPE:
gvc_balance_bar_set_balance_type (self, g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gvc_balance_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GvcBalanceBar *self = GVC_BALANCE_BAR (object);
switch (prop_id) {
case PROP_CONTROL:
g_value_set_object (value, self->priv->control);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gvc_balance_bar_class_init (GvcBalanceBarClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = gvc_balance_bar_dispose;
object_class->set_property = gvc_balance_bar_set_property;
object_class->get_property = gvc_balance_bar_get_property;
properties[PROP_CONTROL] =
g_param_spec_object ("control",
"Control",
"MateMixer stream control",
MATE_MIXER_TYPE_STREAM_CONTROL,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS);
properties[PROP_BALANCE_TYPE] =
g_param_spec_int ("balance-type",
"balance type",
"Whether the balance is right-left or front-rear",
BALANCE_TYPE_RL,
NUM_BALANCE_TYPES - 1,
BALANCE_TYPE_RL,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, N_PROPERTIES, properties);
g_type_class_add_private (klass, sizeof (GvcBalanceBarPrivate));
}
static gboolean
on_scale_scroll_event (GtkWidget *widget,
GdkEventScroll *event,
GvcBalanceBar *bar)
{
gdouble value;
gdouble minimum;
gdouble maximum;
gdouble step;
value = gtk_adjustment_get_value (bar->priv->adjustment);
minimum = gtk_adjustment_get_lower (bar->priv->adjustment);
maximum = gtk_adjustment_get_upper (bar->priv->adjustment);
// XXX fix this for GTK3
if (bar->priv->btype == BALANCE_TYPE_LFE)
step = (maximum - minimum) / 100.0;
else
step = 0.05;
if (event->direction == GDK_SCROLL_UP) {
if (value + step > maximum)
value = maximum;
else
value = value + step;
} else if (event->direction == GDK_SCROLL_DOWN) {
if (value - step < minimum)
value = minimum;
else
value = value - step;
}
gtk_adjustment_set_value (bar->priv->adjustment, value);
return TRUE;
}
static void
on_adjustment_value_changed (GtkAdjustment *adjustment, GvcBalanceBar *bar)
{
gdouble value;
if (bar->priv->control == NULL)
return;
value = gtk_adjustment_get_value (adjustment);
switch (bar->priv->btype) {
case BALANCE_TYPE_RL:
mate_mixer_stream_control_set_balance (bar->priv->control, value);
break;
case BALANCE_TYPE_FR:
mate_mixer_stream_control_set_fade (bar->priv->control, value);
break;
case BALANCE_TYPE_LFE:
mate_mixer_stream_control_set_channel_volume (bar->priv->control,
bar->priv->lfe_channel,
value);
break;
}
}
static void
gvc_balance_bar_init (GvcBalanceBar *bar)
{
bar->priv = GVC_BALANCE_BAR_GET_PRIVATE (bar);
}
static void
gvc_balance_bar_dispose (GObject *object)
{
GvcBalanceBar *bar;
bar = GVC_BALANCE_BAR (object);
if (bar->priv->control != NULL) {
g_signal_handlers_disconnect_by_func (G_OBJECT (bar->priv->control),
on_balance_value_changed,
bar);
g_clear_object (&bar->priv->control);
}
G_OBJECT_CLASS (gvc_balance_bar_parent_class)->dispose (object);
}
GtkWidget *
gvc_balance_bar_new (MateMixerStreamControl *control, GvcBalanceType btype)
{
return g_object_new (GVC_TYPE_BALANCE_BAR,
"balance-type", btype,
"control", control,
"orientation", GTK_ORIENTATION_HORIZONTAL,
NULL);
}