static void
_stream_volume_notify_cb (GObject *object,
GParamSpec *pspec,
MpdVolumeTile *self)
{
update_volume_slider (self);
}
/**
* Handle signals from the audio subsystem.
*
* @param audio the Audio instance that emitted the signal.
* @param event the AudioEvent containing useful information.
* @param data user supplied data.
*/
static void
on_audio_changed(G_GNUC_UNUSED Audio *audio, AudioEvent *event, gpointer data)
{
PopupWindow *window = (PopupWindow *) data;
GtkWidget *popup_window = window->popup_window;
/* Nothing to do if the window is hidden.
* The window will be updated anyway when shown.
*/
if (!gtk_widget_get_visible(popup_window))
return;
/* If the user changes the volume through the popup window,
* we MUST NOT update the slider value, it's been done already.
* It means that, as long as the popup window is visible,
* the slider value reflects the value set by user,
* and not the real value reported by the audio system.
*/
if (event->user == AUDIO_USER_POPUP)
return;
/* Let's update now */
update_mute_check(GTK_TOGGLE_BUTTON(window->mute_check),
G_CALLBACK(on_mute_check_toggled), window, event->muted);
update_volume_slider(window->vol_scale_adj, event->volume);
}
static void
mpd_volume_tile_set_sink (MpdVolumeTile *self,
GvcMixerStream *sink)
{
MpdVolumeTilePrivate *priv = GET_PRIVATE (self);
bool do_notify;
do_notify = sink != priv->sink;
if (priv->sink)
{
g_signal_handlers_disconnect_by_func (priv->sink,
_stream_volume_notify_cb,
self);
g_object_unref (priv->sink);
priv->sink = NULL;
}
if (sink)
{
priv->sink = g_object_ref (sink);
g_signal_connect (priv->sink, "notify::volume",
G_CALLBACK (_stream_volume_notify_cb), self);
update_volume_slider (self);
}
if (do_notify)
{
g_object_notify (G_OBJECT (self), "sink");
}
}
/**
* Shows the popup window, and grab the focus.
*
* @param window a PopupWindow instance.
*/
void
popup_window_show(PopupWindow *window)
{
GtkWidget *popup_window = window->popup_window;
GtkWidget *vol_scale = window->vol_scale;
/* Update window elements at first */
update_mute_check(GTK_TOGGLE_BUTTON(window->mute_check),
G_CALLBACK(on_mute_check_toggled), window,
audio_is_muted(window->audio));
update_volume_slider(window->vol_scale_adj,
audio_get_volume(window->audio));
/* Show the window */
gtk_widget_show_now(popup_window);
/* Give focus to volume scale */
gtk_widget_grab_focus(vol_scale);
/* Grab mouse and keyboard */
grab_devices(popup_window);
}
