/*************************************************************************
 *
 *  $RCSfile: XDragSource.idl,v $
 *
 *  $Revision: 1.8 $
 *
 *  last change: $Author: mi $ $Date: 2002/10/03 13:03:35 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  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
 *
 *  This library is free software; you can redistribute it and/or
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 *  Lesser General Public License for more details.
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 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source 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
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 ************************************************************************/

#ifndef __com_sun_star_datatransfer_dnd_XDragSource_idl__
#define __com_sun_star_datatransfer_dnd_XDragSource_idl__

#ifndef __com_sun_star_datatransfer_dnd_InvalidDNDOperationException_idl__
#include <com/sun/star/datatransfer/dnd/InvalidDNDOperationException.idl>
#endif

#ifndef __com_sun_star_datatransfer_dnd_DragGestureEvent_idl__
#include <com/sun/star/datatransfer/dnd/DragGestureEvent.idl>
#endif

#ifndef __com_sun_star_datatransfer_XTransferable_idl__
#include <com/sun/star/datatransfer/XTransferable.idl>
#endif

#ifndef __com_sun_star_lang_IllegalArgumentException_idl__
#include <com/sun/star/lang/IllegalArgumentException.idl>
#endif

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

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

interface XDragSourceListener;

//=============================================================================
/** This interface is implemented by a view or window that supports drag
	operations and will be received as part of a <type>DragGestureEvent</type>
	through a <member scope="com::sun::star::datatransfer::dnd">XDragGestureListener::dragGestureRecognized()</member> 
	callback.

	<p>Differently to Java, the association between view and interface is fixed
	and can not be changed. Otherwise, the AWT messaging would have to be 
	implemented for any window supporting Drag and Drop operations, which would
	be a real performance issue.</p>
*/

interface XDragSource: com::sun::star::uno::XInterface
{
  
    //-------------------------------------------------------------------------
	/** In order to query if drag image support is available.

		@returns 
		A boolean indicating whether or not drag image support is 
		available on the underlying platform. 
	*/
	
	boolean isDragImageSupported(); 

	//-------------------------------------------------------------------------
	/** To get the default cursor for a specified drag action.

		@param dragAction
		A drag action as specified in <type>DNDConstants</type>.

		@returns 
		The default drag cursor for the specified drag action.
		<p>The returned value may be used as parameter for the method
		<member scope="com::sun::star::datatransfer::dnd">XDragSourceContext::setCursor()</member>.</p>
	*/
	
	long getDefaultCursor( [in] byte dragAction ) 
		raises( com::sun::star::lang::IllegalArgumentException );

	//-------------------------------------------------------------------------
	/** Starts the drag operation.

		<p>Note: this call does <em>not</em> block until the drag and drop 
		operation ends. If the Drag and Drop system is unable to initiate
		a drag operation or if the user attempts to start a drag while an
		existing drag operation is still executing, the action fails immediately.
		This is indicated by calling 
		<member scope="com::sun::star::datatransfer::dnd">XDragSourceListener::dragDropEnd()</member> 
		on the parameter listener with a DragSourceDragEvent showing a failure.</p>

		@param trigger
		The <type>DragGestureEvent</type> that initiated the drag.

		@param sourceActions
		The action or actions supported for this transferable as defined
		in <type>DNDConstants</type>.

		@param cursor
		The initial drag cursor id or 0 as default.

		@param image
		The initial drag image id or 0 as default.
		
		@param trans
		The transferable object dragged.

		@param listener
		The <type>XDragSourceListener</type>.
			
		@see com::sun::star::datatransfer::XTransferable	
	*/
	
	[oneway] void startDrag(
		[in] DragGestureEvent trigger,
		[in] byte sourceActions,
		[in] long cursor, 
		[in] long image,
		[in] com::sun::star::datatransfer::XTransferable trans,	
		[in] XDragSourceListener listener );
};

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

}; }; }; }; };

#endif
