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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-fade-slider.h" |
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#include "gvc-channel-map-private.h" |
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struct _CcFadeSlider |
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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 (CcFadeSlider, cc_fade_slider, GTK_TYPE_WIDGET) |
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static void |
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changed_cb (CcFadeSlider *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_fade (&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 (CcFadeSlider *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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/* If close to 0, set to 0 to also snap while moving with arrow keys */ |
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if (fabs (volumes[FADE]) < 0.01) |
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gtk_adjustment_set_value (self->adjustment, 0); |
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else |
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gtk_adjustment_set_value (self->adjustment, volumes[FADE]); |
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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_fade_slider_dispose (GObject *object) |
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{ |
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CcFadeSlider *self = CC_FADE_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_fade_slider_parent_class)->dispose (object); |
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} |
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void |
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cc_fade_slider_class_init (CcFadeSliderClass *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_fade_slider_dispose; |
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gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/control-center/sound/cc-fade-slider.ui"); |
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gtk_widget_class_bind_template_child (widget_class, CcFadeSlider, scale); |
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gtk_widget_class_bind_template_child (widget_class, CcFadeSlider, 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_fade_slider_init (CcFadeSlider *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_fade_slider_set_channel_map (CcFadeSlider *self, |
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GvcChannelMap *channel_map) |
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{ |
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g_return_if_fail (CC_IS_FADE_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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