public ScreenCreditController(WorldWindow wwd)
{
if (wwd == null)
{
String msg = Logging.getMessage("nullValue.WorldWindow");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
this.wwd = wwd;
if (wwd.getSceneController().getScreenCreditController() != null)
{
wwd.getSceneController().getScreenCreditController().dispose();
}
wwd.getSceneController().setScreenCreditController(this);
wwd.addSelectListener(this);
}