public boolean isInside(MediaItem mi) {
   return view.isInside(mi);
 }
 public boolean isOverlapped(MediaItem mi) {
   return view.isOverlapped(mi);
 }
 public void draw(Graphics ct) {
   view.drawSheet(this, ct);
 }
 public boolean isInside(int x, int y) {
   return view.isInside(x, y);
 }
 public void setRegion(int x, int y, int w, int h) {
   view.setRegion(x, y, w, h);
 }