public class CustomChartDataCursor2 extends DataCursor {
  public CustomChartDataCursor2(ChartView achartview, CartesianCoordinates thetransform,
                       int nmarkertype,
                       double rsize)
  {
        super(achartview, thetransform, nmarkertype, rsize);
  }
   
   // override mouseReleased method in order to add stuff
   public void mousePressed(MouseEvent event)
    {
   	  super.mousePressed(event);
   	  ChartPoint2D p = getLocation(ChartObj.PHYS_POS);
    }

  // override mouseReleased method in order to add stuff
   public void mouseReleased (MouseEvent event)
    {
   	  super.mouseReleased(event);
   	  ChartPoint2D p = getLocation(ChartObj.PHYS_POS);
    }
  }

.
.
.

 CustomChartDataCursor2 dataCursorObj = new CustomChartDataCursor2( gWG, pTransform1,
            ChartConstants.MARKER_NULL, 8.0);

 dataCursorObj.setDataCursorEnable(true);
 dataCursorObj.addDataCursorListener();