@GuiCallback("play_time")
public void updateTime(Widget w, FrameEvent event) {
MediaInstance mi = player.getPlayingMedia();
TextBox.get(w).content = mi == null ? "" : Media.getPlayingTime(mi.getPlayTime());
}
@GuiCallback("progress")
public void updateProgress(Widget w, FrameEvent event) {
MediaInstance mi = player.getPlayingMedia();
ProgressBar.get(w).progress = mi == null ? 0.0 : (double) mi.getPlayTime() / mi.media.length;
}