JPanel that lives above all other components, and is capable of blocking keyboard and mouse input from all components underneath.
Invoked when a key has been pressed. See the class description for {@link KeyEvent} for a definition of a key pressed event.
Invoked when a key has been released. See the class description for {@link KeyEvent} for a definition of a key released event.
Invoked when a key has been typed. See the class description for {@link KeyEvent} for a definition of a key typed event.
set the DragRenderer to be painted on the glasspane.