stringtreedndlistener.java

JGraph扩展应用。自定义Renderer,自定义视图View实现自定义工作流控件

/*
 * $Id: StringTreeDnDListener.java,v 1.2 2006/05/08 19:36:50 aviva Exp $
 * Read the "license.txt" file for licensing information.
 * (C) Antonio Vieiro. All rights reserved.
 */

package net.antonioshome.swing.treewrapper;

import java.util.EventListener;

/**
 * StringTreeDnDListener represents a listener that is informed when
 *   a String is about to be dropped into a node in a JTree.
 * @author Antonio Vieiro ([e-mail]), $Author: aviva $
 * @version $Revision: 1.2 $
 */
public interface StringTreeDnDListener
  extends EventListener
{
  /**
   * Invoked to verify that aSourceString may be dropped into
   *  aTargetNode inside aTargetTree.
   * @param anEvent a StringTreeDnDEvent containing information about
   *  the data being dropped.
   * @throws DnDVetoException if the drag and drop operation is not valid.
   */
  public void mayDrop( StringTreeDnDEvent anEvent )
    throws DnDVetoException;
  
  /**
   * Invoked when the drop operation happens.
   * @param anEvent a StringTreeDnDEvent the event containing information about
   *  the Drag and Drop operation.
   * @throws DnDVetoException if the drag and drop operation is not valid.
   */
  public void drop( StringTreeDnDEvent anEvent )
    throws DnDVetoException;
}