diff options
Diffstat (limited to 'mate-volume-control/src/gvc-balance-bar.c')
| -rw-r--r-- | mate-volume-control/src/gvc-balance-bar.c | 548 |
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); +} |