1 files changed, 548 insertions, 0 deletions
diff --git a/mate-volume-control/src/gvc-balance-bar.c b/mate-volume-control/src/gvc-balance-bar.c
new file mode 100644
index 0000000..6f5c47f
--- /dev/null
+++ b/mate-volume-control/src/gvc-balance-bar.c
@@ -0,0 +1,548 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2008 William Jon McCann
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+#include <canberra-gtk.h>
+
+#include "gvc-balance-bar.h"
+
+#define SCALE_SIZE 128
+#define ADJUSTMENT_MAX_NORMAL 65536.0 /* PA_VOLUME_NORM */
+
+#define GVC_BALANCE_BAR_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GVC_TYPE_BALANCE_BAR, GvcBalanceBarPrivate))
+
+struct GvcBalanceBarPrivate
+{
+ GvcChannelMap *channel_map;
+ GvcBalanceType btype;
+ GtkWidget *scale_box;
+ GtkWidget *start_box;
+ GtkWidget *end_box;
+ GtkWidget *label;
+ GtkWidget *scale;
+ GtkAdjustment *adjustment;
+ GtkSizeGroup *size_group;
+ gboolean symmetric;
+ gboolean click_lock;
+};
+
+enum
+{
+ PROP_0,
+ PROP_CHANNEL_MAP,
+ PROP_BALANCE_TYPE,
+};
+
+static void gvc_balance_bar_class_init (GvcBalanceBarClass *klass);
+static void gvc_balance_bar_init (GvcBalanceBar *balance_bar);
+static void gvc_balance_bar_finalize (GObject *object);
+
+static gboolean on_scale_button_press_event (GtkWidget *widget,
+ GdkEventButton *event,
+ GvcBalanceBar *bar);
+static gboolean on_scale_button_release_event (GtkWidget *widget,
+ GdkEventButton *event,
+ GvcBalanceBar *bar);
+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_HBOX)
+
+static GtkWidget *
+_scale_box_new (GvcBalanceBar *bar)
+{
+ GvcBalanceBarPrivate *priv = bar->priv;
+ GtkWidget *box;
+ GtkWidget *sbox;
+ GtkWidget *ebox;
+ GtkAdjustment *adjustment = bar->priv->adjustment;
+ char *str_lower, *str_upper;
+ gdouble lower, upper;
+
+ bar->priv->scale_box = box = gtk_hbox_new (FALSE, 6);
+ priv->scale = gtk_hscale_new (priv->adjustment);
+ gtk_widget_set_size_request (priv->scale, SCALE_SIZE, -1);
+
+ gtk_widget_set_name (priv->scale, "balance-bar-scale");
+ gtk_rc_parse_string ("style \"balance-bar-scale-style\" {\n"
+ " GtkScale::trough-side-details = 0\n"
+ "}\n"
+ "widget \"*.balance-bar-scale\" style : rc \"balance-bar-scale-style\"\n");
+
+ bar->priv->start_box = sbox = gtk_hbox_new (FALSE, 6);
+ gtk_box_pack_start (GTK_BOX (box), sbox, FALSE, FALSE, 0);
+
+ gtk_box_pack_start (GTK_BOX (sbox), priv->label, FALSE, FALSE, 0);
+
+ gtk_box_pack_start (GTK_BOX (box), priv->scale, TRUE, TRUE, 0);
+
+ 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;
+ default:
+ g_assert_not_reached ();
+ }
+
+ lower = gtk_adjustment_get_lower (adjustment);
+ gtk_scale_add_mark (GTK_SCALE (priv->scale), lower,
+ GTK_POS_BOTTOM, str_lower);
+ g_free (str_lower);
+ upper = gtk_adjustment_get_upper (adjustment);
+ gtk_scale_add_mark (GTK_SCALE (priv->scale), upper,
+ GTK_POS_BOTTOM, str_upper);
+ g_free (str_upper);
+
+ if (bar->priv->btype != BALANCE_TYPE_LFE) {
+ gtk_scale_add_mark (GTK_SCALE (priv->scale),
+ (upper - lower)/2 + lower,
+ GTK_POS_BOTTOM, NULL);
+ }
+
+ bar->priv->end_box = ebox = gtk_hbox_new (FALSE, 6);
+ gtk_box_pack_start (GTK_BOX (box), ebox, FALSE, FALSE, 0);
+
+ gtk_range_set_update_policy (GTK_RANGE (priv->scale), GTK_UPDATE_CONTINUOUS);
+ 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, sbox);
+
+ if (bar->priv->symmetric) {
+ gtk_size_group_add_widget (bar->priv->size_group, ebox);
+ }
+ }
+
+ gtk_scale_set_draw_value (GTK_SCALE (priv->scale), FALSE);
+
+ return box;
+}
+
+void
+gvc_balance_bar_set_size_group (GvcBalanceBar *bar,
+ GtkSizeGroup *group,
+ gboolean symmetric)
+{
+ g_return_if_fail (GVC_IS_BALANCE_BAR (bar));
+
+ 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 const char *
+btype_to_string (guint btype)
+{
+ switch (btype) {
+ case BALANCE_TYPE_RL:
+ return "Balance";
+ case BALANCE_TYPE_FR:
+ return "Fade";
+ break;
+ case BALANCE_TYPE_LFE:
+ return "LFE";
+ default:
+ g_assert_not_reached ();
+ }
+ return NULL;
+}
+
+static void
+update_level_from_map (GvcBalanceBar *bar,
+ GvcChannelMap *map)
+{
+ const gdouble *volumes;
+ gdouble val;
+
+ g_debug ("Volume changed (for %s bar)", btype_to_string (bar->priv->btype));
+
+ volumes = gvc_channel_map_get_volume (map);
+ switch (bar->priv->btype) {
+ case BALANCE_TYPE_RL:
+ val = volumes[BALANCE];
+ break;
+ case BALANCE_TYPE_FR:
+ val = volumes[FADE];
+ break;
+ case BALANCE_TYPE_LFE:
+ val = volumes[LFE];
+ break;
+ default:
+ g_assert_not_reached ();
+ }
+
+ gtk_adjustment_set_value (bar->priv->adjustment, val);
+}
+
+static void
+on_channel_map_volume_changed (GvcChannelMap *map,
+ gboolean set,
+ GvcBalanceBar *bar)
+{
+ update_level_from_map (bar, map);
+}
+
+static void
+gvc_balance_bar_set_channel_map (GvcBalanceBar *bar,
+ GvcChannelMap *map)
+{
+ g_return_if_fail (GVC_BALANCE_BAR (bar));
+
+ if (bar->priv->channel_map != NULL) {
+ g_signal_handlers_disconnect_by_func (G_OBJECT (bar->priv->channel_map),
+ on_channel_map_volume_changed, bar);
+ g_object_unref (bar->priv->channel_map);
+ }
+ bar->priv->channel_map = g_object_ref (map);
+
+ update_level_from_map (bar, map);
+
+ g_signal_connect (G_OBJECT (map), "volume-changed",
+ G_CALLBACK (on_channel_map_volume_changed), bar);
+
+ g_object_notify (G_OBJECT (bar), "channel-map");
+}
+
+static void
+gvc_balance_bar_set_balance_type (GvcBalanceBar *bar,
+ GvcBalanceType btype)
+{
+ GtkWidget *frame;
+
+ g_return_if_fail (GVC_BALANCE_BAR (bar));
+
+ bar->priv->btype = btype;
+ if (bar->priv->btype != BALANCE_TYPE_LFE) {
+ bar->priv->adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0,
+ -1.0,
+ 1.0,
+ 0.5,
+ 0.5,
+ 0.0));
+ } else {
+ bar->priv->adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0,
+ 0.0,
+ ADJUSTMENT_MAX_NORMAL,
+ ADJUSTMENT_MAX_NORMAL/100.0,
+ ADJUSTMENT_MAX_NORMAL/10.0,
+ 0.0));
+ }
+
+ g_object_ref_sink (bar->priv->adjustment);
+ g_signal_connect (bar->priv->adjustment,
+ "value-changed",
+ G_CALLBACK (on_adjustment_value_changed),
+ bar);
+
+ 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;
+ default:
+ g_assert_not_reached ();
+ }
+ 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_container_add (GTK_CONTAINER (bar), frame);
+
+ /* box with scale */
+ bar->priv->scale_box = _scale_box_new (bar);
+ gtk_container_add (GTK_CONTAINER (frame), bar->priv->scale_box);
+ gtk_widget_show_all (frame);
+
+ gtk_widget_set_direction (bar->priv->scale, GTK_TEXT_DIR_LTR);
+ gtk_label_set_mnemonic_widget (GTK_LABEL (bar->priv->label),
+ bar->priv->scale);
+
+ g_object_notify (G_OBJECT (bar), "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_CHANNEL_MAP:
+ gvc_balance_bar_set_channel_map (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_CHANNEL_MAP:
+ g_value_set_object (value, self->priv->channel_map);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GObject *
+gvc_balance_bar_constructor (GType type,
+ guint n_construct_properties,
+ GObjectConstructParam *construct_params)
+{
+ return G_OBJECT_CLASS (gvc_balance_bar_parent_class)->constructor (type, n_construct_properties, construct_params);
+}
+
+static void
+gvc_balance_bar_class_init (GvcBalanceBarClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->constructor = gvc_balance_bar_constructor;
+ object_class->finalize = gvc_balance_bar_finalize;
+ object_class->set_property = gvc_balance_bar_set_property;
+ object_class->get_property = gvc_balance_bar_get_property;
+
+ g_object_class_install_property (object_class,
+ PROP_CHANNEL_MAP,
+ g_param_spec_object ("channel-map",
+ "channel map",
+ "The channel map",
+ GVC_TYPE_CHANNEL_MAP,
+ G_PARAM_READWRITE));
+ g_object_class_install_property (object_class,
+ 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_type_class_add_private (klass, sizeof (GvcBalanceBarPrivate));
+}
+
+
+static gboolean
+on_scale_button_press_event (GtkWidget *widget,
+ GdkEventButton *event,
+ GvcBalanceBar *bar)
+{
+ bar->priv->click_lock = TRUE;
+
+ return FALSE;
+}
+
+static gboolean
+on_scale_button_release_event (GtkWidget *widget,
+ GdkEventButton *event,
+ GvcBalanceBar *bar)
+{
+ bar->priv->click_lock = FALSE;
+
+ return FALSE;
+}
+
+static gboolean
+on_scale_scroll_event (GtkWidget *widget,
+ GdkEventScroll *event,
+ GvcBalanceBar *bar)
+{
+ gdouble value;
+
+ value = gtk_adjustment_get_value (bar->priv->adjustment);
+
+ if (bar->priv->btype == BALANCE_TYPE_LFE) {
+ if (event->direction == GDK_SCROLL_UP) {
+ if (value + ADJUSTMENT_MAX_NORMAL/100.0 > ADJUSTMENT_MAX_NORMAL)
+ value = ADJUSTMENT_MAX_NORMAL;
+ else
+ value = value + ADJUSTMENT_MAX_NORMAL/100.0;
+ } else if (event->direction == GDK_SCROLL_DOWN) {
+ if (value - ADJUSTMENT_MAX_NORMAL/100.0 < 0)
+ value = 0.0;
+ else
+ value = value - ADJUSTMENT_MAX_NORMAL/100.0;
+ }
+ } else {
+ if (event->direction == GDK_SCROLL_UP) {
+ if (value + 0.01 > 1.0)
+ value = 1.0;
+ else
+ value = value + 0.01;
+ } else if (event->direction == GDK_SCROLL_DOWN) {
+ if (value - 0.01 < 0)
+ value = 0.0;
+ else
+ value = value - 0.01;
+ }
+ }
+ gtk_adjustment_set_value (bar->priv->adjustment, value);
+
+ return TRUE;
+}
+
+/* FIXME remove when we depend on a newer PA */
+static pa_cvolume *
+gvc_pa_cvolume_set_position (pa_cvolume *cv, const pa_channel_map *map, pa_channel_position_t t, pa_volume_t v) {
+ unsigned c;
+ gboolean good = FALSE;
+
+ g_assert(cv);
+ g_assert(map);
+
+ g_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), NULL);
+ g_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, NULL);
+
+ for (c = 0; c < map->channels; c++)
+ if (map->map[c] == t) {
+ cv->values[c] = v;
+ good = TRUE;
+ }
+
+ return good ? cv : NULL;
+}
+
+static void
+on_adjustment_value_changed (GtkAdjustment *adjustment,
+ GvcBalanceBar *bar)
+{
+ gdouble val;
+ pa_cvolume cv;
+ const pa_channel_map *pa_map;
+
+ if (bar->priv->channel_map == NULL)
+ return;
+
+ cv = *gvc_channel_map_get_cvolume (bar->priv->channel_map);
+ val = gtk_adjustment_get_value (adjustment);
+
+ pa_map = gvc_channel_map_get_pa_channel_map (bar->priv->channel_map);
+
+ switch (bar->priv->btype) {
+ case BALANCE_TYPE_RL:
+ pa_cvolume_set_balance (&cv, pa_map, val);
+ break;
+ case BALANCE_TYPE_FR:
+ pa_cvolume_set_fade (&cv, pa_map, val);
+ break;
+ case BALANCE_TYPE_LFE:
+ gvc_pa_cvolume_set_position (&cv, pa_map, PA_CHANNEL_POSITION_LFE, val);
+ break;
+ }
+
+ gvc_channel_map_volume_changed (bar->priv->channel_map, &cv, TRUE);
+}
+
+static void
+gvc_balance_bar_init (GvcBalanceBar *bar)
+{
+ bar->priv = GVC_BALANCE_BAR_GET_PRIVATE (bar);
+}
+
+static void
+gvc_balance_bar_finalize (GObject *object)
+{
+ GvcBalanceBar *bar;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (GVC_IS_BALANCE_BAR (object));
+
+ bar = GVC_BALANCE_BAR (object);
+
+ g_return_if_fail (bar->priv != NULL);
+
+ if (bar->priv->channel_map != NULL) {
+ g_signal_handlers_disconnect_by_func (G_OBJECT (bar->priv->channel_map),
+ on_channel_map_volume_changed, bar);
+ g_object_unref (bar->priv->channel_map);
+ }
+
+ G_OBJECT_CLASS (gvc_balance_bar_parent_class)->finalize (object);
+}
+
+GtkWidget *
+gvc_balance_bar_new (const GvcChannelMap *channel_map, GvcBalanceType btype)
+{
+ GObject *bar;
+ bar = g_object_new (GVC_TYPE_BALANCE_BAR,
+ "channel-map", channel_map,
+ "balance-type", btype,
+ NULL);
+ return GTK_WIDGET (bar);
+}