Merge branch 'michal-wip'

1 files changed, 1158 insertions, 0 deletions

diff --git a/mate-volume-control/gvc-channel-bar.c b/mate-volume-control/gvc-channel-bar.c
new file mode 100644
index 0000000..e431651
--- /dev/null
+++ b/mate-volume-control/gvc-channel-bar.c
@@ -0,0 +1,1158 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2008 William Jon McCann
+ * Copyright (C) 2014 Michal Ratajsky <[email protected]>
+ *
+ * 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 "config.h"
+
+#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-channel-bar.h"
+
+#define SCALE_SIZE 128
+#define GVC_CHANNEL_BAR_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GVC_TYPE_CHANNEL_BAR, GvcChannelBarPrivate))
+
+struct _GvcChannelBarPrivate
+{
+        GtkOrientation              orientation;
+        GtkWidget                  *scale_box;
+        GtkWidget                  *start_box;
+        GtkWidget                  *end_box;
+        GtkWidget                  *image;
+        GtkWidget                  *label;
+        GtkWidget                  *low_image;
+        GtkWidget                  *scale;
+        GtkWidget                  *high_image;
+        GtkWidget                  *mute_box;
+        GtkWidget                  *mute_button;
+        GtkAdjustment              *adjustment;
+        gboolean                    show_icons;
+        gboolean                    show_mute;
+        gboolean                    show_marks;
+        gboolean                    extended;
+        GtkSizeGroup               *size_group;
+        gboolean                    symmetric;
+        gboolean                    click_lock;
+        MateMixerStreamControl     *control;
+        MateMixerStreamControlFlags control_flags;
+};
+
+enum {
+        PROP_0,
+        PROP_CONTROL,
+        PROP_ORIENTATION,
+        PROP_SHOW_ICONS,
+        PROP_SHOW_MUTE,
+        PROP_SHOW_MARKS,
+        PROP_EXTENDED,
+        PROP_NAME,
+        PROP_ICON_NAME,
+        PROP_LOW_ICON_NAME,
+        PROP_HIGH_ICON_NAME,
+        N_PROPERTIES
+};
+
+static GParamSpec *properties[N_PROPERTIES] = { NULL, };
+
+static void     gvc_channel_bar_class_init    (GvcChannelBarClass *klass);
+static void     gvc_channel_bar_init          (GvcChannelBar      *bar);
+
+static gboolean on_scale_button_press_event   (GtkWidget          *widget,
+                                               GdkEventButton     *event,
+                                               GvcChannelBar      *bar);
+static gboolean on_scale_button_release_event (GtkWidget          *widget,
+                                               GdkEventButton     *event,
+                                               GvcChannelBar      *bar);
+static gboolean on_scale_scroll_event         (GtkWidget          *widget,
+                                               GdkEventScroll     *event,
+                                               GvcChannelBar      *bar);
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+G_DEFINE_TYPE (GvcChannelBar, gvc_channel_bar, GTK_TYPE_BOX)
+#else
+G_DEFINE_TYPE (GvcChannelBar, gvc_channel_bar, GTK_TYPE_HBOX)
+#endif
+
+static void
+create_scale_box (GvcChannelBar *bar)
+{
+#if GTK_CHECK_VERSION (3, 0, 0)
+        bar->priv->scale_box = gtk_box_new (bar->priv->orientation, 6);
+        bar->priv->start_box = gtk_box_new (bar->priv->orientation, 6);
+        bar->priv->end_box   = gtk_box_new (bar->priv->orientation, 6);
+        bar->priv->scale     = gtk_scale_new (bar->priv->orientation,
+                                              bar->priv->adjustment);
+#else
+        if (bar->priv->orientation == GTK_ORIENTATION_VERTICAL) {
+                bar->priv->scale_box = gtk_vbox_new (FALSE, 6);
+                bar->priv->start_box = gtk_vbox_new (FALSE, 6);
+                bar->priv->end_box   = gtk_vbox_new (FALSE, 6);
+                bar->priv->scale     = gtk_vscale_new (bar->priv->adjustment);
+        } else {
+                bar->priv->scale_box = gtk_hbox_new (FALSE, 6);
+                bar->priv->start_box = gtk_hbox_new (FALSE, 6);
+                bar->priv->end_box   = gtk_hbox_new (FALSE, 6);
+                bar->priv->scale     = gtk_hscale_new (bar->priv->adjustment);
+        }
+#endif
+        if (bar->priv->orientation == GTK_ORIENTATION_VERTICAL) {
+                gtk_widget_set_size_request (bar->priv->scale, -1, SCALE_SIZE);
+
+                gtk_range_set_inverted (GTK_RANGE (bar->priv->scale), TRUE);
+
+                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->image,
+                                    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->start_box),
+                                    bar->priv->high_image,
+                                    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);
+
+                gtk_box_pack_start (GTK_BOX (bar->priv->end_box),
+                                    bar->priv->low_image,
+                                    FALSE, FALSE, 0);
+                gtk_box_pack_start (GTK_BOX (bar->priv->end_box),
+                                    bar->priv->mute_box,
+                                    FALSE, FALSE, 0);
+        } else {
+                gtk_widget_set_size_request (bar->priv->scale, SCALE_SIZE, -1);
+
+                gtk_box_pack_start (GTK_BOX (bar->priv->scale_box),
+                                    bar->priv->image,
+                                    FALSE, FALSE, 0);
+                gtk_box_pack_start (GTK_BOX (bar->priv->scale_box),
+                                    bar->priv->start_box,
+                                    FALSE, FALSE, 0);
+
+                gtk_box_pack_end (GTK_BOX (bar->priv->start_box),
+                                  bar->priv->low_image,
+                                  FALSE, FALSE, 0);
+
+                gtk_box_pack_start (GTK_BOX (bar->priv->start_box),
+                                    bar->priv->label,
+                                    TRUE, TRUE, 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);
+
+                gtk_box_pack_start (GTK_BOX (bar->priv->end_box),
+                                    bar->priv->high_image,
+                                    FALSE, FALSE, 0);
+                gtk_box_pack_start (GTK_BOX (bar->priv->end_box),
+                                    bar->priv->mute_box,
+                                    FALSE, FALSE, 0);
+        }
+
+        if (bar->priv->show_icons) {
+                gtk_widget_show (bar->priv->low_image);
+                gtk_widget_show (bar->priv->high_image);
+        } else {
+                gtk_widget_hide (bar->priv->low_image);
+                gtk_widget_hide (bar->priv->high_image);
+        }
+
+        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),
+                          "button-press-event",
+                          G_CALLBACK (on_scale_button_press_event),
+                          bar);
+        g_signal_connect (G_OBJECT (bar->priv->scale),
+                          "button-release-event",
+                          G_CALLBACK (on_scale_button_release_event),
+                          bar);
+        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
+on_adjustment_value_changed (GtkAdjustment *adjustment,
+                             GvcChannelBar *bar)
+{
+        gdouble value;
+        gdouble lower;
+
+        if (bar->priv->control == NULL || bar->priv->click_lock == TRUE)
+                return;
+
+        value = gtk_adjustment_get_value (bar->priv->adjustment);
+        lower = gtk_adjustment_get_lower (bar->priv->adjustment);
+
+        if (bar->priv->control_flags & MATE_MIXER_STREAM_CONTROL_MUTE_WRITABLE)
+                mate_mixer_stream_control_set_mute (bar->priv->control, (value <= lower));
+
+        if (bar->priv->control_flags & MATE_MIXER_STREAM_CONTROL_VOLUME_WRITABLE)
+                mate_mixer_stream_control_set_volume (bar->priv->control, (guint) value);
+}
+
+static void
+on_mute_button_toggled (GtkToggleButton *button, GvcChannelBar *bar)
+{
+        gboolean mute;
+
+        mute = gtk_toggle_button_get_active (button);
+
+        mate_mixer_stream_control_set_mute (bar->priv->control, mute);
+}
+
+static void
+update_layout (GvcChannelBar *bar)
+{
+        GtkWidget *frame;
+
+        if (bar->priv->scale == NULL)
+                return;
+
+        frame = gtk_widget_get_parent (bar->priv->scale_box);
+
+        g_object_ref (bar->priv->image);
+        g_object_ref (bar->priv->label);
+        g_object_ref (bar->priv->mute_box);
+        g_object_ref (bar->priv->low_image);
+        g_object_ref (bar->priv->high_image);
+
+        // XXX this is not the opposite of what is done above
+        gtk_container_remove (GTK_CONTAINER (bar->priv->start_box),
+                              bar->priv->image);
+        gtk_container_remove (GTK_CONTAINER (bar->priv->start_box),
+                              bar->priv->label);
+        gtk_container_remove (GTK_CONTAINER (bar->priv->end_box),
+                              bar->priv->mute_box);
+
+        if (bar->priv->orientation == GTK_ORIENTATION_VERTICAL) {
+                gtk_container_remove (GTK_CONTAINER (bar->priv->start_box),
+                                      bar->priv->low_image);
+                gtk_container_remove (GTK_CONTAINER (bar->priv->end_box),
+                                      bar->priv->high_image);
+        } else {
+                gtk_container_remove (GTK_CONTAINER (bar->priv->end_box),
+                                      bar->priv->low_image);
+                gtk_container_remove (GTK_CONTAINER (bar->priv->start_box),
+                                      bar->priv->high_image);
+        }
+
+        gtk_container_remove (GTK_CONTAINER (bar->priv->scale_box),
+                              bar->priv->start_box);
+        gtk_container_remove (GTK_CONTAINER (bar->priv->scale_box),
+                              bar->priv->scale);
+        gtk_container_remove (GTK_CONTAINER (bar->priv->scale_box),
+                              bar->priv->end_box);
+        gtk_container_remove (GTK_CONTAINER (frame),
+                              bar->priv->scale_box);
+
+        create_scale_box (bar);
+        gtk_container_add (GTK_CONTAINER (frame), bar->priv->scale_box);
+
+        g_object_unref (bar->priv->image);
+        g_object_unref (bar->priv->label);
+        g_object_unref (bar->priv->mute_box);
+        g_object_unref (bar->priv->low_image);
+        g_object_unref (bar->priv->high_image);
+
+        gtk_widget_show_all (frame);
+}
+
+static void
+update_marks (GvcChannelBar *bar)
+{
+        gdouble  base;
+        gdouble  normal;
+        gboolean has_mark = FALSE;
+
+        gtk_scale_clear_marks (GTK_SCALE (bar->priv->scale));
+
+        if (bar->priv->control == NULL || bar->priv->show_marks == FALSE)
+                return;
+
+        /* Base volume represents unamplified volume, normal volume is the 100%
+         * volume, in many cases they are the same as unamplified volume is unknown */
+        base   = mate_mixer_stream_control_get_base_volume (bar->priv->control);
+        normal = mate_mixer_stream_control_get_normal_volume (bar->priv->control);
+
+        if (normal <= gtk_adjustment_get_lower (bar->priv->adjustment))
+                return;
+
+        if (base < normal) {
+                gchar *str = g_strdup_printf ("<small>%s</small>", C_("volume", "Unamplified"));
+
+                gtk_scale_add_mark (GTK_SCALE (bar->priv->scale),
+                                    base,
+                                    GTK_POS_BOTTOM,
+                                    str);
+                has_mark = TRUE;
+                g_free (str);
+        }
+
+        /* Only show 100% mark if the scale is extended beyond 100% and
+         * there is no unamplified mark or it is below the normal volume */
+        if (bar->priv->extended && (base == normal || base < normal)) {
+                gchar *str = g_strdup_printf ("<small>%s</small>", C_("volume", "100%"));
+
+                gtk_scale_add_mark (GTK_SCALE (bar->priv->scale),
+                                    normal,
+                                    GTK_POS_BOTTOM,
+                                    str);
+                has_mark = TRUE;
+                g_free (str);
+        }
+
+        if (has_mark) {
+                gtk_alignment_set (GTK_ALIGNMENT (bar->priv->mute_box), 0.5, 0, 0, 0);
+
+                gtk_misc_set_alignment (GTK_MISC (bar->priv->low_image), 0.5, 0);
+                gtk_misc_set_alignment (GTK_MISC (bar->priv->high_image), 0.5, 0);
+                gtk_misc_set_alignment (GTK_MISC (bar->priv->label), 0, 0);
+        } else {
+                gtk_alignment_set (GTK_ALIGNMENT (bar->priv->mute_box), 0.5, 0.5, 0, 0);
+
+                gtk_misc_set_alignment (GTK_MISC (bar->priv->low_image), 0.5, 0.5);
+                gtk_misc_set_alignment (GTK_MISC (bar->priv->high_image), 0.5, 0.5);
+                gtk_misc_set_alignment (GTK_MISC (bar->priv->label), 0, 0.5);
+        }
+}
+
+static void
+update_adjustment_value (GvcChannelBar *bar)
+{
+        gdouble  value;
+        gboolean set_lower = FALSE;
+
+        /* Move the slider to the minimal value if the stream control is muted or
+         * volume is unavailable */
+        if (bar->priv->control == NULL)
+                set_lower = TRUE;
+        else if (bar->priv->control_flags & MATE_MIXER_STREAM_CONTROL_MUTE_READABLE)
+                set_lower = mate_mixer_stream_control_get_mute (bar->priv->control);
+
+        if (set_lower == TRUE)
+                value = gtk_adjustment_get_lower (bar->priv->adjustment);
+        else
+                value = mate_mixer_stream_control_get_volume (bar->priv->control);
+
+        g_signal_handlers_block_by_func (G_OBJECT (bar->priv->adjustment),
+                                         on_adjustment_value_changed,
+                                         bar);
+
+        gtk_adjustment_set_value (bar->priv->adjustment, value);
+
+        g_signal_handlers_unblock_by_func (G_OBJECT (bar->priv->adjustment),
+                                           on_adjustment_value_changed,
+                                           bar);
+}
+
+static void
+update_adjustment_limits (GvcChannelBar *bar)
+{
+        gdouble minimum = 0.0;
+        gdouble maximum = 0.0;
+
+        if (bar->priv->control != NULL) {
+                minimum = mate_mixer_stream_control_get_min_volume (bar->priv->control);
+                if (bar->priv->extended)
+                        maximum = mate_mixer_stream_control_get_max_volume (bar->priv->control);
+                else
+                        maximum = mate_mixer_stream_control_get_normal_volume (bar->priv->control);
+        }
+
+        gtk_adjustment_configure (bar->priv->adjustment,
+                                  gtk_adjustment_get_value (bar->priv->adjustment),
+                                  minimum,
+                                  maximum,
+                                  (maximum - minimum) / 100.0,
+                                  (maximum - minimum) / 15.0,
+                                  0.0);
+}
+
+static void
+update_mute_button (GvcChannelBar *bar)
+{
+        if (bar->priv->show_mute == TRUE) {
+                gboolean enable = FALSE;
+
+                if (bar->priv->control != NULL &&
+                    bar->priv->control_flags & MATE_MIXER_STREAM_CONTROL_MUTE_READABLE)
+                        enable = TRUE;
+
+                if (enable == TRUE) {
+                        gboolean mute = mate_mixer_stream_control_get_mute (bar->priv->control);
+
+                        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (bar->priv->mute_button),
+                                                      mute);
+                } else {
+                        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (bar->priv->mute_button),
+                                                      FALSE);
+                }
+
+                gtk_widget_set_sensitive (bar->priv->mute_button, enable);
+                gtk_widget_show (bar->priv->mute_button);
+        } else
+                gtk_widget_hide (bar->priv->mute_button);
+}
+
+static gboolean
+on_scale_button_press_event (GtkWidget      *widget,
+                             GdkEventButton *event,
+                             GvcChannelBar  *bar)
+{
+
+#if !GTK_CHECK_VERSION (3, 6, 0)
+        /* Up to GTK 3.4 the slider selection only moves in increments when
+         * clicking in the slider with the left button and it moves directly
+         * to the clicked position with the middle mouse button.
+         * Change this behaviour to also jump to the clicked position with the
+         * left mouse button. */
+        if (event->button == 1)
+                event->button = 2;
+#endif
+
+        /* Muting the stream when volume is non-zero moves the slider to zero,
+         * but the volume remains the same. In this case delay unmuting and
+         * changing volume until user releases the mouse button. */
+        if (bar->priv->control_flags & MATE_MIXER_STREAM_CONTROL_MUTE_READABLE &&
+            bar->priv->control_flags & MATE_MIXER_STREAM_CONTROL_VOLUME_READABLE) {
+                if (mate_mixer_stream_control_get_mute (bar->priv->control) == TRUE) {
+                        guint minimum = (guint) gtk_adjustment_get_lower (bar->priv->adjustment);
+
+                        if (mate_mixer_stream_control_get_volume (bar->priv->control) > minimum)
+                                bar->priv->click_lock = TRUE;
+                }
+        }
+        return FALSE;
+}
+
+static gboolean
+on_scale_button_release_event (GtkWidget      *widget,
+                               GdkEventButton *event,
+                               GvcChannelBar  *bar)
+{
+#if !GTK_CHECK_VERSION (3, 6, 0)
+        if (event->button == 1)
+                event->button = 2;
+#endif
+
+        if (bar->priv->click_lock == TRUE) {
+                /* The volume change is not reflected while the lock is
+                 * held, propagate the change now that user has released
+                 * the mouse button */
+                bar->priv->click_lock = FALSE;
+                on_adjustment_value_changed (bar->priv->adjustment, bar);
+        }
+
+        /* Play a sound */
+        ca_gtk_play_for_widget (GTK_WIDGET (bar), 0,
+                                CA_PROP_EVENT_ID, "audio-volume-change",
+                                CA_PROP_EVENT_DESCRIPTION, "Volume change",
+                                CA_PROP_APPLICATION_ID, "org.mate.VolumeControl",
+                                CA_PROP_APPLICATION_NAME, _("Volume Control"),
+                                CA_PROP_APPLICATION_VERSION, VERSION,
+                                CA_PROP_APPLICATION_ICON_NAME, "multimedia-volume-control",
+                                NULL);
+        return FALSE;
+}
+
+static gboolean
+on_scale_scroll_event (GtkWidget      *widget,
+                       GdkEventScroll *event,
+                       GvcChannelBar  *bar)
+{
+        GdkScrollDirection direction = event->direction;
+
+#if GTK_CHECK_VERSION (3, 4, 0)
+        if (direction == GDK_SCROLL_SMOOTH) {
+                gdouble dx = 0.0;
+                gdouble dy = 0.0;
+
+                gdk_event_get_scroll_deltas ((const GdkEvent *) event, &dx, &dy);
+                if (dy > 0.0)
+                        direction = GDK_SCROLL_DOWN;
+                else if (dy < 0.0)
+                        direction = GDK_SCROLL_UP;
+                else
+                        return FALSE;
+        }
+#endif
+        return gvc_channel_bar_scroll (bar, direction);
+}
+
+static void
+on_control_volume_notify (MateMixerStreamControl *control,
+                          GParamSpec             *pspec,
+                          GvcChannelBar          *bar)
+{
+        update_adjustment_value (bar);
+}
+
+static void
+on_control_mute_notify (MateMixerStreamControl *control,
+                        GParamSpec             *pspec,
+                        GvcChannelBar          *bar)
+{
+        if (bar->priv->show_mute == TRUE) {
+                gboolean mute = mate_mixer_stream_control_get_mute (control);
+
+                g_signal_handlers_block_by_func (G_OBJECT (bar->priv->mute_button),
+                                                 on_mute_button_toggled,
+                                                 bar);
+
+                gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (bar->priv->mute_button), mute);
+
+                g_signal_handlers_unblock_by_func (G_OBJECT (bar->priv->mute_button),
+                                                   on_mute_button_toggled,
+                                                   bar);
+        }
+        update_adjustment_value (bar);
+}
+
+MateMixerStreamControl *
+gvc_channel_bar_get_control (GvcChannelBar *bar)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), NULL);
+
+        return bar->priv->control;
+}
+
+void
+gvc_channel_bar_set_control (GvcChannelBar *bar, MateMixerStreamControl *control)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        if (bar->priv->control == control)
+                return;
+
+        if (control != NULL)
+                g_object_ref (control);
+
+        if (bar->priv->control != NULL) {
+                g_signal_handlers_disconnect_by_func (G_OBJECT (bar->priv->control),
+                                                      G_CALLBACK (on_control_volume_notify),
+                                                      bar);
+                g_signal_handlers_disconnect_by_func (G_OBJECT (bar->priv->control),
+                                                      G_CALLBACK (on_control_mute_notify),
+                                                      bar);
+                g_object_unref (bar->priv->control);
+        }
+
+        bar->priv->control = control;
+
+        if (control != NULL)
+                bar->priv->control_flags = mate_mixer_stream_control_get_flags (control);
+        else
+                bar->priv->control_flags = MATE_MIXER_STREAM_CONTROL_NO_FLAGS;
+
+        if (bar->priv->control_flags & MATE_MIXER_STREAM_CONTROL_VOLUME_READABLE)
+                g_signal_connect (G_OBJECT (control),
+                                  "notify::volume",
+                                  G_CALLBACK (on_control_volume_notify),
+                                  bar);
+        if (bar->priv->control_flags & MATE_MIXER_STREAM_CONTROL_MUTE_READABLE)
+                g_signal_connect (G_OBJECT (control),
+                                  "notify::mute",
+                                  G_CALLBACK (on_control_mute_notify),
+                                  bar);
+
+        update_marks (bar);
+        update_mute_button (bar);
+        update_adjustment_limits (bar);
+        update_adjustment_value (bar);
+}
+
+GtkOrientation
+gvc_channel_bar_get_orientation (GvcChannelBar *bar)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), 0);
+
+        return bar->priv->orientation;
+}
+
+void
+gvc_channel_bar_set_orientation (GvcChannelBar  *bar,
+                                 GtkOrientation  orientation)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        if (orientation == bar->priv->orientation)
+                return;
+
+        bar->priv->orientation = orientation;
+        update_layout (bar);
+
+        g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_ORIENTATION]);
+}
+
+gboolean
+gvc_channel_bar_get_show_icons (GvcChannelBar *bar)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), FALSE);
+
+        return bar->priv->show_icons;
+}
+
+void
+gvc_channel_bar_set_show_icons (GvcChannelBar *bar, gboolean show_icons)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        if (show_icons == bar->priv->show_icons)
+                return;
+
+        bar->priv->show_icons = show_icons;
+
+        if (bar->priv->show_icons == TRUE) {
+                gtk_widget_show (bar->priv->low_image);
+                gtk_widget_show (bar->priv->high_image);
+        } else {
+                gtk_widget_hide (bar->priv->low_image);
+                gtk_widget_hide (bar->priv->high_image);
+        }
+
+        g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_SHOW_ICONS]);
+}
+
+gboolean
+gvc_channel_bar_get_show_mute (GvcChannelBar *bar)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), FALSE);
+
+        return bar->priv->show_mute;
+}
+
+void
+gvc_channel_bar_set_show_mute (GvcChannelBar *bar, gboolean show_mute)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        if (show_mute == bar->priv->show_mute)
+                return;
+
+        bar->priv->show_mute = show_mute;
+        update_mute_button (bar);
+
+        g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_SHOW_MUTE]);
+}
+
+gboolean
+gvc_channel_bar_get_show_marks (GvcChannelBar *bar)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), FALSE);
+
+        return bar->priv->show_marks;
+}
+
+void
+gvc_channel_bar_set_show_marks (GvcChannelBar *bar, gboolean show_marks)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        if (show_marks == bar->priv->show_marks)
+                return;
+
+        bar->priv->show_marks = show_marks;
+        update_marks (bar);
+
+        g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_SHOW_MARKS]);
+}
+
+gboolean
+gvc_channel_bar_get_extended (GvcChannelBar *bar)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), FALSE);
+
+        return bar->priv->extended;
+}
+
+void
+gvc_channel_bar_set_extended (GvcChannelBar *bar, gboolean extended)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        if (extended == bar->priv->extended)
+                return;
+
+        bar->priv->extended = extended;
+
+        /* Update displayed marks as non-extended scales do not show the 100%
+         * limit at the end of the scale */
+        update_marks (bar);
+        update_adjustment_limits (bar);
+
+        g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_EXTENDED]);
+}
+
+const gchar *
+gvc_channel_bar_get_name (GvcChannelBar *bar)
+{
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), NULL);
+
+        return gtk_label_get_text (GTK_LABEL (bar->priv->label));
+}
+
+void
+gvc_channel_bar_set_name (GvcChannelBar *bar, const gchar *name)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        if (name != NULL) {
+                gtk_label_set_text_with_mnemonic (GTK_LABEL (bar->priv->label), name);
+                gtk_label_set_mnemonic_widget (GTK_LABEL (bar->priv->label),
+                                               bar->priv->scale);
+
+                gtk_widget_show (bar->priv->label);
+        } else {
+                gtk_label_set_text (GTK_LABEL (bar->priv->label), NULL);
+                gtk_widget_hide (bar->priv->label);
+        }
+
+        g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_NAME]);
+}
+
+const gchar *
+gvc_channel_bar_get_icon_name (GvcChannelBar *bar)
+{
+        const gchar *name = NULL;
+
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), NULL);
+
+        gtk_image_get_icon_name (GTK_IMAGE (bar->priv->image), &name, NULL);
+        return name;
+}
+
+void
+gvc_channel_bar_set_icon_name (GvcChannelBar *bar, const gchar *name)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        gtk_image_set_from_icon_name (GTK_IMAGE (bar->priv->image),
+                                      name,
+                                      GTK_ICON_SIZE_DIALOG);
+        if (name != NULL)
+                gtk_widget_show (bar->priv->image);
+        else
+                gtk_widget_hide (bar->priv->image);
+
+        g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_ICON_NAME]);
+}
+
+const gchar *
+gvc_channel_bar_get_low_icon_name (GvcChannelBar *bar)
+{
+        const gchar *name = NULL;
+
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), NULL);
+
+        gtk_image_get_icon_name (GTK_IMAGE (bar->priv->low_image), &name, NULL);
+        return name;
+}
+
+void
+gvc_channel_bar_set_low_icon_name (GvcChannelBar *bar, const gchar *name)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        gtk_image_set_from_icon_name (GTK_IMAGE (bar->priv->low_image),
+                                      name,
+                                      GTK_ICON_SIZE_BUTTON);
+
+        g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_LOW_ICON_NAME]);
+}
+
+const gchar *
+gvc_channel_bar_get_high_icon_name (GvcChannelBar *bar)
+{
+        const gchar *name = NULL;
+
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), NULL);
+
+        gtk_image_get_icon_name (GTK_IMAGE (bar->priv->high_image), &name, NULL);
+        return name;
+}
+
+void
+gvc_channel_bar_set_high_icon_name (GvcChannelBar *bar, const gchar *name)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_BAR (bar));
+
+        gtk_image_set_from_icon_name (GTK_IMAGE (bar->priv->high_image),
+                                      name,
+                                      GTK_ICON_SIZE_BUTTON);
+
+        g_object_notify_by_pspec (G_OBJECT (bar), properties[PROP_HIGH_ICON_NAME]);
+}
+
+gboolean
+gvc_channel_bar_scroll (GvcChannelBar *bar, GdkScrollDirection direction)
+{
+        gdouble value;
+        gdouble minimum;
+        gdouble maximum;
+        gdouble scrollstep;
+
+        g_return_val_if_fail (GVC_IS_CHANNEL_BAR (bar), FALSE);
+
+        if (bar->priv->orientation == GTK_ORIENTATION_VERTICAL) {
+                if (direction != GDK_SCROLL_UP && direction != GDK_SCROLL_DOWN)
+                        return FALSE;
+        } else {
+                /* Switch direction for RTL */
+                if (gtk_widget_get_direction (GTK_WIDGET (bar)) == GTK_TEXT_DIR_RTL) {
+                        if (direction == GDK_SCROLL_RIGHT)
+                                direction = GDK_SCROLL_LEFT;
+                        else if (direction == GDK_SCROLL_LEFT)
+                                direction = GDK_SCROLL_RIGHT;
+                }
+
+                /* Switch side scroll to vertical */
+                if (direction == GDK_SCROLL_RIGHT)
+                        direction = GDK_SCROLL_UP;
+                else if (direction == GDK_SCROLL_LEFT)
+                        direction = GDK_SCROLL_DOWN;
+        }
+
+        value   = gtk_adjustment_get_value (bar->priv->adjustment);
+        minimum = gtk_adjustment_get_lower (bar->priv->adjustment);
+        maximum = gtk_adjustment_get_upper (bar->priv->adjustment);
+
+        scrollstep = maximum / 100.0 * 5.0;
+
+        if (direction == GDK_SCROLL_UP) {
+                if (value + scrollstep > maximum)
+                        value = maximum;
+                else
+                        value = value + scrollstep;
+        } else if (direction == GDK_SCROLL_DOWN) {
+                if (value - scrollstep < minimum)
+                        value = minimum;
+                else
+                        value = value - scrollstep;
+        }
+
+        gtk_adjustment_set_value (bar->priv->adjustment, value);
+        return TRUE;
+}
+
+void
+gvc_channel_bar_set_size_group (GvcChannelBar *bar,
+                                GtkSizeGroup  *group,
+                                gboolean       symmetric)
+{
+        g_return_if_fail (GVC_IS_CHANNEL_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
+gvc_channel_bar_set_property (GObject       *object,
+                              guint          prop_id,
+                              const GValue  *value,
+                              GParamSpec    *pspec)
+{
+        GvcChannelBar *self = GVC_CHANNEL_BAR (object);
+
+        switch (prop_id) {
+        case PROP_CONTROL:
+                gvc_channel_bar_set_control (self, g_value_get_object (value));
+                break;
+        case PROP_ORIENTATION:
+                gvc_channel_bar_set_orientation (self, g_value_get_enum (value));
+                break;
+        case PROP_SHOW_MUTE:
+                gvc_channel_bar_set_show_mute (self, g_value_get_boolean (value));
+                break;
+        case PROP_SHOW_ICONS:
+                gvc_channel_bar_set_show_icons (self, g_value_get_boolean (value));
+                break;
+        case PROP_SHOW_MARKS:
+                gvc_channel_bar_set_show_marks (self, g_value_get_boolean (value));
+                break;
+        case PROP_EXTENDED:
+                gvc_channel_bar_set_extended (self, g_value_get_boolean (value));
+                break;
+        case PROP_NAME:
+                gvc_channel_bar_set_name (self, g_value_get_string (value));
+                break;
+        case PROP_ICON_NAME:
+                gvc_channel_bar_set_icon_name (self, g_value_get_string (value));
+                break;
+        case PROP_LOW_ICON_NAME:
+                gvc_channel_bar_set_low_icon_name (self, g_value_get_string (value));
+                break;
+        case PROP_HIGH_ICON_NAME:
+                gvc_channel_bar_set_high_icon_name (self, g_value_get_string (value));
+                break;
+        default:
+                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+                break;
+        }
+}
+
+static void
+gvc_channel_bar_get_property (GObject     *object,
+                              guint        prop_id,
+                              GValue      *value,
+                              GParamSpec  *pspec)
+{
+        GvcChannelBar *self = GVC_CHANNEL_BAR (object);
+
+        switch (prop_id) {
+        case PROP_CONTROL:
+                g_value_set_object (value, self->priv->control);
+                break;
+        case PROP_ORIENTATION:
+                g_value_set_enum (value, self->priv->orientation);
+                break;
+        case PROP_SHOW_MUTE:
+                g_value_set_boolean (value, self->priv->show_mute);
+                break;
+        case PROP_SHOW_ICONS:
+                g_value_set_boolean (value, self->priv->show_icons);
+                break;
+        case PROP_SHOW_MARKS:
+                g_value_set_boolean (value, self->priv->show_marks);
+                break;
+        case PROP_EXTENDED:
+                g_value_set_boolean (value, self->priv->extended);
+                break;
+        case PROP_NAME:
+                g_value_set_string (value, gtk_label_get_text (GTK_LABEL (self->priv->label)));
+                break;
+        default:
+                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+                break;
+        }
+}
+
+static void
+gvc_channel_bar_class_init (GvcChannelBarClass *klass)
+{
+        GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+        object_class->set_property = gvc_channel_bar_set_property;
+        object_class->get_property = gvc_channel_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_CONSTRUCT |
+                                     G_PARAM_STATIC_STRINGS);
+
+        properties[PROP_ORIENTATION] =
+                g_param_spec_enum ("orientation",
+                                   "Orientation",
+                                   "The orientation of the scale",
+                                   GTK_TYPE_ORIENTATION,
+                                   GTK_ORIENTATION_VERTICAL,
+                                   G_PARAM_READWRITE |
+                                   G_PARAM_STATIC_STRINGS);
+
+        properties[PROP_SHOW_MUTE] =
+                g_param_spec_boolean ("show-mute",
+                                      "show mute",
+                                      "Whether stream is muted",
+                                      FALSE,
+                                      G_PARAM_READWRITE |
+                                      G_PARAM_CONSTRUCT |
+                                      G_PARAM_STATIC_STRINGS);
+
+        properties[PROP_SHOW_ICONS] =
+                g_param_spec_boolean ("show-icons",
+                                      "show mute",
+                                      "Whether to show low and high icons",
+                                      FALSE,
+                                      G_PARAM_READWRITE |
+                                      G_PARAM_CONSTRUCT |
+                                      G_PARAM_STATIC_STRINGS);
+
+        properties[PROP_SHOW_MARKS] =
+                g_param_spec_boolean ("show-marks",
+                                      "Show marks",
+                                      "Whether to show scale marks",
+                                      FALSE,
+                                      G_PARAM_READWRITE |
+                                      G_PARAM_CONSTRUCT |
+                                      G_PARAM_STATIC_STRINGS);
+
+        properties[PROP_EXTENDED] =
+                g_param_spec_boolean ("extended",
+                                      "Extended",
+                                      "Allow the scale to be extended above normal volume",
+                                      FALSE,
+                                      G_PARAM_READWRITE |
+                                      G_PARAM_STATIC_STRINGS);
+
+        properties[PROP_NAME] =
+                g_param_spec_string ("name",
+                                     "Name",
+                                     "Name to display for this stream",
+                                     NULL,
+                                     G_PARAM_READWRITE |
+                                     G_PARAM_CONSTRUCT |
+                                     G_PARAM_STATIC_STRINGS);
+
+        properties[PROP_ICON_NAME] =
+                g_param_spec_string ("icon-name",
+                                     "Icon name",
+                                     "Name of icon to display for this stream",
+                                     NULL,
+                                     G_PARAM_WRITABLE |
+                                     G_PARAM_CONSTRUCT |
+                                     G_PARAM_STATIC_STRINGS);
+
+        properties[PROP_LOW_ICON_NAME] =
+                g_param_spec_string ("low-icon-name",
+                                     "Low icon name",
+                                     "Name of low volume icon to display for this stream",
+                                     "audio-volume-low",
+                                     G_PARAM_WRITABLE |
+                                     G_PARAM_CONSTRUCT |
+                                     G_PARAM_STATIC_STRINGS);
+
+        properties[PROP_HIGH_ICON_NAME] =
+                g_param_spec_string ("high-icon-name",
+                                     "High icon name",
+                                     "Name of high volume icon to display for this stream",
+                                     "audio-volume-high",
+                                     G_PARAM_WRITABLE |
+                                     G_PARAM_CONSTRUCT |
+                                     G_PARAM_STATIC_STRINGS);
+
+        g_object_class_install_properties (object_class, N_PROPERTIES, properties);
+
+        g_type_class_add_private (klass, sizeof (GvcChannelBarPrivate));
+}
+
+static void
+gvc_channel_bar_init (GvcChannelBar *bar)
+{
+        GtkWidget *frame;
+
+        bar->priv = GVC_CHANNEL_BAR_GET_PRIVATE (bar);
+
+        /* Mute button */
+        bar->priv->mute_button = gtk_check_button_new_with_label (_("Mute"));
+        gtk_widget_set_no_show_all (bar->priv->mute_button, TRUE);
+
+        g_signal_connect (bar->priv->mute_button,
+                          "toggled",
+                          G_CALLBACK (on_mute_button_toggled),
+                          bar);
+
+        bar->priv->mute_box = gtk_alignment_new (0.5, 0.5, 0, 0);
+        gtk_container_add (GTK_CONTAINER (bar->priv->mute_box), bar->priv->mute_button);
+
+        bar->priv->image = gtk_image_new ();
+        gtk_widget_set_no_show_all (bar->priv->image, TRUE);
+
+        /* Low/high icons */
+        bar->priv->low_image = gtk_image_new ();
+        gtk_widget_set_no_show_all (bar->priv->low_image, TRUE);
+
+        bar->priv->high_image = gtk_image_new ();
+        gtk_widget_set_no_show_all (bar->priv->high_image, TRUE);
+
+        bar->priv->label = gtk_label_new (NULL);
+        gtk_misc_set_alignment (GTK_MISC (bar->priv->label), 0.0, 0.5);
+        gtk_widget_set_no_show_all (bar->priv->label, TRUE);
+
+        /* 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);
+
+        gtk_widget_show_all (frame);
+
+        /* Create a default adjustment */
+        bar->priv->adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0, 0, 0, 0, 0, 0));
+
+        g_object_ref_sink (bar->priv->adjustment);
+
+        g_signal_connect (bar->priv->adjustment,
+                          "value-changed",
+                          G_CALLBACK (on_adjustment_value_changed),
+                          bar);
+
+        /* Initially create a vertical scale box */
+        bar->priv->orientation = GTK_ORIENTATION_VERTICAL;
+
+        create_scale_box (bar);
+
+        gtk_container_add (GTK_CONTAINER (frame), bar->priv->scale_box);
+}
+
+GtkWidget *
+gvc_channel_bar_new (MateMixerStreamControl *control)
+{
+        return g_object_new (GVC_TYPE_CHANNEL_BAR,
+                             "control", control,
+#if GTK_CHECK_VERSION (3, 0, 0)
+                             "orientation", GTK_ORIENTATION_HORIZONTAL,
+#endif
+                             NULL);
+}