int x, int y, int clickCount, boolean popupTrigger)
int x, int y, int clickCount, boolean popupTrigger, int button)
  public MouseEvent(Component source, int id, long when, int modifiers,                    int x, int y, int clickCount, boolean popupTrigger)  {    this(source, id, when, modifiers, x, y, clickCount, popupTrigger,         NOBUTTON);  }