/*************************************************************************
 *
 *  $RCSfile: XDropTargetListener.idl,v $
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 *  $Revision: 1.8 $
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 *  last change: $Author: hr $ $Date: 2003/03/26 13:53:37 $
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 *         - GNU Lesser General Public License Version 2.1
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 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
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 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
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 ************************************************************************/

#ifndef __com_sun_star_datatransfer_dnd_XDropTargetListener_idl__
#define __com_sun_star_datatransfer_dnd_XDropTargetListener_idl__

#ifndef __com_sun_star_datatransfer_dnd_DropTargetDragEnterEvent_idl__
#include <com/sun/star/datatransfer/dnd/DropTargetDragEnterEvent.idl>
#endif

#ifndef __com_sun_star_datatransfer_dnd_DropTargetDropEvent_idl__
#include <com/sun/star/datatransfer/dnd/DropTargetDropEvent.idl>
#endif

#ifndef __com_sun_star_lang_XEventListener_idl__
#include <com/sun/star/lang/XEventListener.idl>
#endif

//=============================================================================

module com { module sun { module star { module datatransfer { module dnd {

//=============================================================================
/** This interface is the callback interface used by the drop target object to 
	provide notification of Drag and Drop operations that involve the subject 
	drop target.

	<p>Methods of this interface may be implemented to provide "drag under" 
	visual feedback to the user throughout the Drag and Drop operation.</p>
*/

interface XDropTargetListener: com::sun::star::lang::XEventListener
{
	//-------------------------------------------------------------------------
	/** The drag operation has terminated with a drop on this drop target.

		<p><strong>NOTE:</strong> This method should not be oneway. The implentation
		has to wait until the method <method>XDropTargetDropContext::dropComplete</method>
		is called before releasing the data for the drop operation. This
		should occur before returning from drop in a normal flow of operation.
		Also, the implementor of <type>XDropTargetListener</type> should not assume
		the <type>DropTargetDropEvent</type> to be meaningful after returning
		from the <member>XDropTargetListener::drop()</member> method.</p>
		
		@param dtde
		The <type>DropTargetDropEvent</type>.
	*/

	void drop( [in] DropTargetDropEvent dtde );

  	//-------------------------------------------------------------------------
	/** Called when a drag operation has encountered the drop target.

		@param dtde
		The <type>DropTargetDragEvent</type>.
	*/
		
	[oneway] void dragEnter( [in] DropTargetDragEnterEvent dtdee );

  	//-------------------------------------------------------------------------
	/** The drag operation has departed the drop target without dropping.

		@param dte
		The <type>DropTargetEvent</type>.
	*/

	[oneway] void dragExit( [in] DropTargetEvent dte );

  	//-------------------------------------------------------------------------
	/** Called when a drag operation is ongoing on the drop target.

		@param dtde
		The <type>DropTargetEvent</type>.
	*/

	[oneway] void dragOver( [in] DropTargetDragEvent dtde );

  	//-------------------------------------------------------------------------
	/** Called when the user has modified the drop gesture.	

		@param dtde
		The <type>DropTargetEvent</type>.
	*/

	[oneway] void dropActionChanged( [in] DropTargetDragEvent dtde );
};

//=============================================================================

}; }; }; }; };

#endif
