/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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 the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Denis Issoupov <denis@macadamian.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * ***** END LICENSE BLOCK ***** */
#ifndef nsDragService_h__
#define nsDragService_h__

#include "nsBaseDragService.h"
#include "nsClipboard.h"
#include "nsIDragSessionQt.h"

#include <qwidget.h> 
#include <qdragobject.h> 

//----------------------------------------------------------
/* Native Qt DragService wrapper */
class nsDragService : public nsBaseDragService, public nsIDragSessionQt
{
public:
  nsDragService();
  virtual ~nsDragService();

  //nsISupports
  NS_DECL_ISUPPORTS_INHERITED
  
    //nsIDragService
  NS_IMETHOD InvokeDragSession(nsIDOMNode *aDOMNode,
                               nsISupportsArray *anArrayTransferables,
                               nsIScriptableRegion *aRegion,
                               PRUint32 aActionType);
  NS_IMETHOD StartDragSession();
  NS_IMETHOD EndDragSession(PRBool aDragDone);

  // nsIDragSession
  NS_IMETHOD SetCanDrop(PRBool aCanDrop);
  NS_IMETHOD GetCanDrop(PRBool *aCanDrop);
  NS_IMETHOD GetNumDropItems(PRUint32 *aNumItems);
  NS_IMETHOD GetData(nsITransferable *aTransferable,PRUint32 aItemIndex);
  NS_IMETHOD IsDataFlavorSupported(const char *aDataFlavor,PRBool *_retval);

  // nsIDragSessionQt
  NS_IMETHOD SetDragReference(QMimeSource* aDragRef); 

protected:
  QDragObject *RegisterDragFlavors(nsITransferable* transferable);

private:
  // the source of our drags
  QWidget     *mHiddenWidget;
  QDragObject *mDragObject;

  // our source data items
  nsCOMPtr<nsISupportsArray> mSourceDataItems;
};

#endif // nsDragService_h__