package com.bbn.openmap.tools.dnd;

import java.awt.Component;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;

import com.bbn.openmap.util.Debug;

/**
 * The MultiDndCatcher is a "master" catcher that holds the instance of the
 * MultiCactherDrageGestureListener. During find and init, this catcher will
 * add other drag listeners to its MultiCatcherDragGestureRecogniser.
 * 
 * @author matt
 * @author last modified by $Author$
 * @version $Revision$ $Date$
 */
public class MultiDnDCatcher extends DefaultDnDCatcher {

  /**
   * Constructs a new MultiDnDCatcher given the DragSource for the Component.
   * 
   * @param ds the DragSource for the Component
   */
  public MultiDnDCatcher() {
    this(new DragSource());
  }

  /**
   * Chained constructor.
   * 
   * @param ds
   */
  public MultiDnDCatcher(DragSource ds) {
    super(ds);

  }

  /**
   * Chained constructor.
   *
   * @param ds
   * @param c
   */
  public MultiDnDCatcher(DragSource ds, Component c) {
    super(ds, c);
  }

  /**
   * Chained constructor.
   * 
   * @param ds
   * @param c
   * @param act
   */
  public MultiDnDCatcher(DragSource ds, Component c, int act) {
    super(ds, c, act);
  }

  /**
   * Chained constructor.
   * 
   * @param ds
   * @param c
   * @param act
   * @param dgl
   */
  public MultiDnDCatcher(DragSource ds, Component c, int act, DragGestureListener dgl) {

    dragSource = getDragSource();

    // Create a DragGestureListener that will work with multiple catchers.
    dragGestureListener = new MultiCatcherDragGestureListener(this);
    ((MultiCatcherDragGestureListener) dragGestureListener).addCatcher(this);
    setSourceActions(DnDConstants.ACTION_MOVE);

  }

  
  /**
   * @param someObj
   * @see com.bbn.openmap.tools.dnd.DefaultDnDCatcher#findAndInit(java.lang.Object)
   */
  
  public void findAndInit(Object obj) {

    super.findAndInit(obj);
  
    if (obj instanceof DefaultDnDCatcher && !(obj == this)) {

      DefaultDnDCatcher catcher = (DefaultDnDCatcher) obj;
      ((MultiCatcherDragGestureListener)dragGestureListener).addCatcher(catcher);
      Debug.message("dnd", "MultiDndCatcher added catcher of class " + obj.getClass().getName());

    }
  }


  {
  }

}