128 lines
4 KiB
C
128 lines
4 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
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*
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* Copyright (C) 2018 Canonical Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cc-sound-resources.h"
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#include "cc-balance-slider.h"
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#include "gvc-channel-map-private.h"
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struct _CcBalanceSlider
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{
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GtkWidget parent_instance;
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GtkWidget *scale;
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GtkAdjustment *adjustment;
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GvcChannelMap *channel_map;
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guint volume_changed_handler_id;
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};
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G_DEFINE_TYPE (CcBalanceSlider, cc_balance_slider, GTK_TYPE_WIDGET)
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static void
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changed_cb (CcBalanceSlider *self)
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{
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gdouble value;
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const pa_channel_map *pa_map;
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pa_cvolume pa_volume;
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if (self->channel_map == NULL)
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return;
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value = gtk_adjustment_get_value (self->adjustment);
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pa_map = gvc_channel_map_get_pa_channel_map (self->channel_map);
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pa_volume = *gvc_channel_map_get_cvolume (self->channel_map);
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pa_cvolume_set_balance (&pa_volume, pa_map, value);
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gvc_channel_map_volume_changed (self->channel_map, &pa_volume, TRUE);
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}
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static void
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volume_changed_cb (CcBalanceSlider *self)
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{
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const gdouble *volumes;
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volumes = gvc_channel_map_get_volume (self->channel_map);
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g_signal_handlers_block_by_func (self->adjustment, volume_changed_cb, self);
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gtk_adjustment_set_value (self->adjustment, volumes[BALANCE]);
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g_signal_handlers_unblock_by_func (self->adjustment, volume_changed_cb, self);
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}
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static void
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cc_balance_slider_dispose (GObject *object)
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{
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CcBalanceSlider *self = CC_BALANCE_SLIDER (object);
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g_clear_pointer (&self->scale, gtk_widget_unparent);
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g_clear_object (&self->channel_map);
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G_OBJECT_CLASS (cc_balance_slider_parent_class)->dispose (object);
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}
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void
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cc_balance_slider_class_init (CcBalanceSliderClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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object_class->dispose = cc_balance_slider_dispose;
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gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/control-center/sound/cc-balance-slider.ui");
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gtk_widget_class_bind_template_child (widget_class, CcBalanceSlider, scale);
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gtk_widget_class_bind_template_child (widget_class, CcBalanceSlider, adjustment);
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gtk_widget_class_bind_template_callback (widget_class, changed_cb);
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gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
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}
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void
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cc_balance_slider_init (CcBalanceSlider *self)
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{
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g_resources_register (cc_sound_get_resource ());
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gtk_widget_init_template (GTK_WIDGET (self));
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// Don't flip the slider with RTL locale
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gtk_widget_set_direction (self->scale, GTK_TEXT_DIR_LTR);
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}
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void
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cc_balance_slider_set_channel_map (CcBalanceSlider *self,
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GvcChannelMap *channel_map)
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{
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g_return_if_fail (CC_IS_BALANCE_SLIDER (self));
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if (self->channel_map != NULL)
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{
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g_signal_handler_disconnect (self->channel_map, self->volume_changed_handler_id);
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self->volume_changed_handler_id = 0;
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}
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g_clear_object (&self->channel_map);
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if (channel_map != NULL)
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{
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self->channel_map = g_object_ref (channel_map);
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self->volume_changed_handler_id = g_signal_connect_object (channel_map,
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"volume-changed",
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G_CALLBACK (volume_changed_cb),
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self, G_CONNECT_SWAPPED);
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volume_changed_cb (self);
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}
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}
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