diff options
Diffstat (limited to 'mate-volume-control/gvc-balance-bar.c')
| -rw-r--r-- | mate-volume-control/gvc-balance-bar.c | 552 |
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); +} |