1 files changed, 552 insertions, 0 deletions
diff --git a/mate-volume-control/gvc-balance-bar.c b/mate-volume-control/gvc-balance-bar.c
new file mode 100644
index 0000000..7431773
--- /dev/null
+++ b/mate-volume-control/gvc-balance-bar.c
@@ -0,0 +1,552 @@
+/* -*- 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 <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);
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+G_DEFINE_TYPE (GvcBalanceBar, gvc_balance_bar, GTK_TYPE_BOX)
+#else
+G_DEFINE_TYPE (GvcBalanceBar, gvc_balance_bar, GTK_TYPE_HBOX)
+#endif
+
+static void
+create_scale_box (GvcBalanceBar *bar)
+{
+#if GTK_CHECK_VERSION (3, 0, 0)
+ 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);
+#if GTK_CHECK_VERSION (3, 4, 0)
+ /* 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);
+#endif
+#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);
+
+ /* GTK2 way to remove the origin */
+ if (bar->priv->btype != BALANCE_TYPE_LFE) {
+ gtk_rc_parse_string (BALANCE_BAR_STYLE);
+ gtk_widget_set_name (bar->priv->scale, "balance-bar-scale");
+ }
+#endif
+
+ 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_misc_set_alignment (GTK_MISC (bar->priv->label), 0.0, 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,
+#if GTK_CHECK_VERSION (3, 0, 0)
+ "orientation", GTK_ORIENTATION_HORIZONTAL,
+#endif
+ NULL);
+}