* @return the drag and drop handler
*/
public DNDHandler getDNDHandler() {
if (m_dndHandler == null) {
m_dndHandler = new DNDHandler(new AttributeDNDController());
m_dndHandler.setOrientation(Orientation.VERTICAL);
m_dndHandler.setScrollEnabled(true);
m_dndHandler.setScrollElement(m_scrollElement);
}
return m_dndHandler;