@Override public void handleMouseMoved(ChartCanvas canvas,MouseEvent e){
  if (!canvas.isTooltipEnabled()) {
    return;
  }
  String text=getTooltipText(canvas,e.getX(),e.getY());
  canvas.setTooltip(text,e.getScreenX(),e.getScreenY());
}

@ Override public void handleMouseMoved ( ChartCanvas canvas , MouseEvent e ) { if ( ! canvas . isTooltipEnabled ( ) ) { return ; } String text = getTooltipText ( canvas , e . getX ( ) , e . getY ( ) ) ; canvas . setTooltip ( text , e . getScreenX ( ) , e . getScreenY ( ) ) ; }
handles a mouse moved event by updating the tooltip .
