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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: viewlayer.hxx,v $
*
* $Revision: 1.4 $
*
* last change: $Author: kz $ $Date: 2006-12-13 16:07:55 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 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
*
************************************************************************/
#ifndef _SLIDESHOW_VIEWLAYER_HXX
#define _SLIDESHOW_VIEWLAYER_HXX
#include <cppcanvas/spritecanvas.hxx>
#include <basegfx/range/b2irectangle.hxx>
#include <boost/shared_ptr.hpp>
namespace basegfx { class B1DRange; class B2DRange; }
/* Definition of ViewLayer interface */
namespace slideshow
{
namespace internal
{
class ViewLayer
{
public:
virtual ~ViewLayer() {}
/** Get the associated canvas of this layer.
The canvas returned by this method must not change, as
long as this object is alive.
*/
virtual ::cppcanvas::CanvasSharedPtr getCanvas() const = 0;
/** Create a sprite for this layer
@param rSpriteSizePixel
Sprite size in device pixel
@return the sprite, or NULL on failure (or if this canvas
does not support sprites)
*/
virtual ::cppcanvas::CustomSpriteSharedPtr createSprite( const ::basegfx::B2DSize& rSpriteSizePixel ) const = 0;
/** Compute a sprite priority relative to this layer.
@param nSpritePrio
Priority of the Sprite within this layer
@return absolute sprite priority, to be set at a ::cppcanvas::Sprite
*/
virtual double getSpritePriority( double nSpritePrio ) const = 0;
/** Set the layer priority
This method influences the relative priority of this
layer, i.e. the z position in relation to other layers on
the parent view. The higher the priority, the further in front
the layer resides.
@param nPrio
Priority, must be in the range [0,1]
*/
virtual void setPriority( double nPrio ) = 0;
};
typedef ::boost::shared_ptr< ViewLayer > ViewLayerSharedPtr;
}
}
#endif /* _SLIDESHOW_VIEWLAYER_HXX */
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