Hi,
i wrote Java code for Zoom on Scroll. But how to handle the Scroll down and Up action in mouse. i tried  to set .setZoomFactor(20) and  .setZoomFactor(150),it was only for 2 positions, can we have a dynamically set zoom factor wrto amount of scroll.

public void mouseWheelMoved(MouseWheelEvent evt){

//evt.
Point2D boxDevPos = new Point(evt.getX(), evt.getY());

//Point2D.Float boxDocPos = m_mainJDiagramView.deviceToDoc(boxDevPos);
Point boxDocPos = m_mainJDiagramView.docToDevice(boxDevPos);

if(evt.getWheelRotation()==-1){
m_mainJDiagramView.setZoomFactor(20);
}else{
m_mainJDiagramView.setZoomFactor(150);
}

Point2D afterZoom =m_mainJDiagramView.deviceToDoc(boxDocPos);

//Point newcurpos = m_mainJDiagramView.ClientToDoc(m_mainJDiagramView.PointToClient(evt.getPoint()))
;


m_mainJDiagramView.setScrollX((float) (m_mainJDiagramView.getScrollX() - boxDevPos.getX() + afterZoom .getX()));
m_mainJDiagramView.setScrollY((float) (m_mainJDiagramView.getScrollY() - boxDevPos.getY() + afterZoom .getY()));

}

regards
sandeep