/*************************************************************************
 *
 *  $RCSfile: XCloseListener.idl,v $
 *
 *  $Revision: 1.3 $
 *
 *  last change: $Author: hr $ $Date: 2003/03/26 13:58:11 $
 *
 *  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
 *  modify it under the terms of the GNU Lesser General Public
 *  License version 2.1, as published by the Free Software Foundation.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA  02111-1307  USA
 *
 *
 *  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
 *  License at http://www.openoffice.org/license.html.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): _______________________________________
 *
 *
 ************************************************************************/
#ifndef __com_sun_star_util_XCloseListener_idl__
#define __com_sun_star_util_XCloseListener_idl__

#ifndef __com_sun_star_util_CloseVetoException_idl__
#include <com/sun/star/util/CloseVetoException.idl>
#endif

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

#ifndef __com_sun_star_lang_EventObject_idl__
#include <com/sun/star/lang/EventObject.idl>
#endif

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

 module com {  module sun {  module star {  module util {

//=============================================================================
/** makes it possible to receive events when an object
    is called for closing

    <p>
    Such close events are broadcasted by a <type>XCloseBroadcaster</type>
    if somewhere tries to close it by calling <member>XCloseable::close()</member>.
    Listener can:
    <ul>
        <li>break that by throwing <type>CloseVetoException</type></li>
        <li>or accept that by deregister himself at this broadcaster.</li>
    </ul>
    </p>

    <p>
    If an event <method scope="com::sun::star::lang">XEventListener::disposing</method>
    occured, nobody called <method>XCloseable::close</method> on listened object before.
    Then it's not allowed to break this request - it must be accepted!
    </p>

    @see XCloseable
    @see XCloseBroadcaster
 */
interface XCloseListener: com::sun::star::lang::XEventListener
{
	//-------------------------------------------------------------------------
    /** is called when somewhere tries to close listened object

        <p>
        Is called before <member>XCloseListener::notifyClosing()</member>.
        Listener has the chance to break that by throwing a <type>CloseVetoException</type>.
        This exception must be passed to the original caller of <member>XCloseable::close()</member>
        without any interaction.
        </p>

        <p>
        The parameter <var>GetsOwnership</var> regulate who has to try to close the listened object
        again, if this listener disagree with the request by throwing the exception.
        If it's set to <FALSE/> the original caller of <member>XCloseable::close()</member>
        will be the owner in every case. It's not allowed to call close() from this listener then.
        If it's set to <TRUE/> this listener will be the new owner if he throw the exception,
        otherwise not! If his still running processes will be finished he must call close() on
        listened object again then.
        </p>

        <p>
        If this listener doesn't disagree with th close request it depends from his internal
        implementation if he deregister himself at the listened object.
        But normaly this must be done in <member>XCloseListener::notifyClosing()</member>.
        </p>

        @param Source
            describes the source of the event (must be the listened object)

        @param GetsOwnership
            <TRUE/> pass the ownership to this listener, if he throw the veto exception
            (otherwise this parameter must be ignored!)
            <br>
            <FALSE/> forbids to grab the ownership for the listened close object and call
            close() on that any time.

        @raises CloseVetoException
            if listener disagree with the close request on listened object he must throw this exception
	 */
    void queryClosing(
        [in] com::sun::star::lang::EventObject Source,
        [in] boolean GetsOwnership )
            raises( CloseVetoException );

	//-------------------------------------------------------------------------
    /** is called when the listened object is closed realy

        <p>
        Now the listened object is closed realy. Listener has to accept that;
        should deregister himself and relaese all references to it.
        It's not allowed nor possible to disagree with that by throwing any exception.
        </p>

        <p>
        If the event <member scope="com::sun::star::lang">XEventListener::disposing()</member> occured before
        it must be accepted too. There exist no chance for a disagreement any more.
        </p>

        @param Source
            describes the source of the event (must be the listened object)
	 */
    void notifyClosing( [in] com::sun::star::lang::EventObject Source );
};

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

}; }; }; };

#endif
