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/* This file is part of the KDE project
Copyright (C) 2001, 2002, 2003 The Karbon Developers
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __VLAYER_H__
#define __VLAYER_H__
#include "vgroup.h"
#include <koffice_export.h>
class QDomElement;
class DCOPObject;
/**
* VLayer manages a set of vobjects. It keeps the objects from bottom to top
* in a list, ie. objects higher in the list are drawn above lower objects.
* Objects in a layer can be manipulated and worked on independant of objects
* in other layers.
*/
class KARBONBASE_EXPORT VLayer : public VGroup
{
public:
/**
* Constructs a new layer object that is child of parent and has the given state.
*
* @param parent the new object's parent
* @param state the new object's state
*/
VLayer( VObject* parent, VState state = normal );
/**
* Copy constructor.
*
* @param layer the layer to copy properties from
*/
VLayer( const VLayer& layer );
virtual ~VLayer();
virtual DCOPObject* dcopObject();
virtual void draw( VPainter *painter, const KoRect* rect = 0L ) const;
virtual void save( QDomElement& element ) const;
virtual void saveOasis( KoStore *store, KoXmlWriter *docWriter, KoGenStyles &mainStyles, int &index ) const;
virtual void load( const QDomElement& element );
virtual VLayer* clone() const;
virtual void accept( VVisitor& visitor );
/**
* Moves the object to the top of the list.
*
* When the object is at the top this method has no effect.
*
* @param object the object to move
*/
void bringToFront( const VObject& object );
/**
* Moves the object one step up the list.
*
* When the object is at the top this method has no effect.
*
* @param object the object to move
*/
void upwards( const VObject& object );
/**
* Moves the object one step down the list.
*
* When the object is at the bottom this method has no effect.
*
* @param object the object to move
*/
void downwards( const VObject& object );
/**
* Moves the object to the end of the list.
*
* When the object is at the bottom this method has no effect.
*
* @param object the object to move
*/
void sendToBack( const VObject& object );
/**
* Selects or unselects the layer
*
* @param state the new selection state
*/
void setSelected( bool state ) { setState( state ? VObject::selected : VObject::normal ); }
/**
* Returns the selection state of the layer
*
* @return the actual selection state
*/
bool selected() { return state() == VObject::selected; }
};
#endif
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