/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */


#ifndef nsIDOMDragListener_h__
#define nsIDOMDragListener_h__

#include "nsIDOMEvent.h"
#include "nsIDOMEventListener.h"

/*
 * Mouse up/down/move event listener
 *
 */
#define NS_IDOMDRAGLISTENER_IID \
{ /* 6b8b25d0-ded5-11d1-bd85-00805f8ae3f4 */ \
0x6b8b25d0, 0xded5, 0x11d1, \
{0xbd, 0x85, 0x00, 0x80, 0x5f, 0x8a, 0xe3, 0xf4} }

class nsIDOMDragListener : public nsIDOMEventListener {

public:

   NS_DEFINE_STATIC_IID_ACCESSOR(NS_IDOMDRAGLISTENER_IID)

  /**
  * Processes a drag enter event
  * @param aMouseEvent @see nsIDOMEvent.h 
  * @returns whether the event was consumed or ignored. @see nsresult
  */
  virtual nsresult DragEnter(nsIDOMEvent* aMouseEvent) = 0;

  /**
  * Processes a drag over event
  * @param aMouseEvent @see nsIDOMEvent.h 
  * @returns whether the event was consumed or ignored. @see nsresult
  */
  virtual nsresult DragOver(nsIDOMEvent* aMouseEvent) = 0;

  /**
  * Processes a drag Exit event
  * @param aMouseEvent @see nsIDOMEvent.h 
  * @returns whether the event was consumed or ignored. @see nsresult
  */
  virtual nsresult DragExit(nsIDOMEvent* aMouseEvent) = 0;

  /**
   * Processes a drag drop event
   * @param aMouseEvent @see nsIDOMEvent.h 
   * @returns whether the event was consumed or ignored. @see nsresult
   */
  virtual nsresult DragDrop(nsIDOMEvent* aMouseEvent) = 0;
  
  /**
   * Processes a drag gesture event
   * @param aMouseEvent @see nsIDOMEvent.h 
   * @returns whether the event was consumed or ignored. @see nsresult
   */
  virtual nsresult DragGesture(nsIDOMEvent* aMouseEvent) = 0;

};

#endif // nsIDOMDragListener_h__