void
StandardControls::check_play_state ()
{
- if (!_film || _film->video_frame_rate() == 0) {
+ auto viewer = _viewer.lock ();
+ if (!_film || _film->video_frame_rate() == 0 || !viewer) {
return;
}
if (_play_button->GetValue()) {
- _viewer->start ();
+ viewer->start ();
} else {
- _viewer->stop ();
+ viewer->stop ();
}
}