+
+ menu.addSeparator();
+
+ // Add an audio source selector.
+ QAction *audio_source_action = new QAction("Use as audio source", &menu);
+ audio_source_action->setCheckable(true);
+ if (global_mixer->get_audio_source() == signal_num) {
+ audio_source_action->setChecked(true);
+ audio_source_action->setEnabled(false);
+ }
+ menu.addAction(audio_source_action);
+