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/*************************************************************************
*
* $RCSfile: activity.hxx,v $
*
* $Revision: 1.2 $
*
* last change: $Author: rt $ $Date: 2004-11-26 19:11:46 $
*
* 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 _SLIDESHOW_ACTIVITY_HXX
#define _SLIDESHOW_ACTIVITY_HXX
#ifndef _SAL_TYPES_H_
#include <sal/types.h>
#endif
#ifndef BOOST_SHARED_PTR_HPP_INCLUDED
#include <boost/shared_ptr.hpp>
#endif
#include <disposable.hxx>
/* Definition of Activity interface */
namespace presentation
{
namespace internal
{
class Activity : public Disposable
{
public:
/** Perform the activity associated with this interface's
implementation.
@return true, if activity continues, or false, if activity has
ended.
*/
virtual bool perform() = 0;
/** Query whether this activity is still continuing
@return true, if this activity still
continues. Returns false, if activity has ended. It is
required that operator() returns false, when
isActive() returns false. Furthermore, it is required
that the inactive state is persistent; an activity
that has become inactive (i.e. isActive() once
returned false) must stay in that state eternally.
*/
virtual bool isActive() const = 0;
/** Query whether this activity, while active, needs a
screen update after perform() calls.
A prominent example for activities that need screen
updates are animations.
@return true, if this activity, while active, needs a
screen update after perform() calls.
*/
virtual bool needsScreenUpdate() const = 0;
/** End the activity prematurely
This method ends the activity prematurely, i.e. before
time or number of iterations is reached. The next time
perform() or isActive() are called, false is returned.
*/
virtual void end() = 0;
};
typedef ::boost::shared_ptr< Activity > ActivitySharedPtr;
}
}
#endif /* _SLIDESHOW_ACTIVITY_HXX */
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