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// Copyright (C) 2003 Dominique Devriese <devriese@kde.org>
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// This program 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301, USA.
#ifndef KIG_OBJECTS_OBJECT_HOLDER_H
#define KIG_OBJECTS_OBJECT_HOLDER_H
#include "object_calcer.h"
#include <qstring.h>
/**
* An ObjectHolder represents an object as it is known to the
* document. It keeps a pointer to an ObjectCalcer, where it gets its
* data ( the ObjectImp that the ObjectCalcer holds ) from. It also
* holds information about how to draw this ObjectImp on the window,
* by keeping a pointer to an ObjectDrawer ( see below ). In its draw
* method, it gets the ObjectImp from the ObjectCalcer, and passes it
* to the ObjectDrawer, asking it to draw the ObjectImp on the window.
*
* The document ( check the KigDocument class ) holds a list of these
* ObjectHolder's. This is its only link with the ObjectCalcer
* dependency graph.
*
* An ObjectHolder keeps a reference to its * ObjectCalcer.
*/
class ObjectHolder
{
ObjectCalcer::shared_ptr mcalcer;
ObjectDrawer* mdrawer;
ObjectConstCalcer::shared_ptr mnamecalcer;
public:
/**
* Construct a new ObjectHolder with a given ObjectCalcer and
* ObjectDrawer, with a given name calcer.
*/
ObjectHolder( ObjectCalcer* calcer, ObjectDrawer* drawer, ObjectConstCalcer* namecalcer );
/**
* Construct a new ObjectHolder with a given ObjectCalcer and
* ObjectDrawer.
*/
ObjectHolder( ObjectCalcer* calcer, ObjectDrawer* drawer );
/**
* equivalent to the previous constructor, but with a default
* ObjectDrawer and no name.
*/
ObjectHolder( ObjectCalcer* calcer );
~ObjectHolder();
const ObjectImp* imp() const;
const ObjectCalcer* calcer() const;
ObjectCalcer* calcer();
const ObjectDrawer* drawer() const;
ObjectDrawer* drawer();
// the following two return zero if no name is set.
const ObjectConstCalcer* nameCalcer() const;
ObjectConstCalcer* nameCalcer();
/**
* Setting the namecalcer is only allowed if previously none was
* set. This way, we avoid keeping a useless namecalcer around if
* no name is set.
*/
void setNameCalcer( ObjectConstCalcer* namecalcer );
/**
* returns QString::null if no name is set.
*/
const QString name() const;
/**
* Set the ObjectDrawer of this ObjectHolder to \p d , the old
* ObjectDrawer is deleted.
*/
void setDrawer( ObjectDrawer* d );
/**
* Set the ObjectDrawer of this ObjectHolder to \p d , the old
* ObjectDrawer is not deleted, but returned.
*/
ObjectDrawer* switchDrawer( ObjectDrawer* d );
/**
* Make our ObjectCalcer recalculate its ObjectImp.
*/
void calc( const KigDocument& );
/**
* Draw this object on the given KigPainter. If \p selected is true,
* then it will be drawn in red, instead of its normal color.
*/
void draw( KigPainter& p, bool selected ) const;
/**
* Returns whether this object contains the point \p p .
*/
bool contains( const Coordinate& p, const KigWidget& w, bool nv = false ) const;
/**
* Returns whether this object is in the rectangle \p r .
*/
bool inRect( const Rect& r, const KigWidget& w ) const;
/**
* Returns whether this object is shown.
*/
bool shown() const;
/**
* This call is simply forwarded to the ObjectCalcer. Check the
* documentation of ObjectCalcer::moveReferencePoint() for more info.
*/
const Coordinate moveReferencePoint() const;
/**
* This call is simply forwarded to the ObjectCalcer. Check the
* documentation of ObjectCalcer::move() for more info.
*/
void move( const Coordinate& to, const KigDocument& );
/**
* This call is simply forwarded to the ObjectCalcer. Check the
* documentation of ObjectCalcer::canMove() for more info.
*/
bool canMove() const;
/**
* This call is simply forwarded to the ObjectCalcer. Check the
* documentation of ObjectCalcer::isFreelyTranslatable() for more info.
*/
bool isFreelyTranslatable() const;
/**
* Return a statement saying something like "select this segment" or
* "select segment ab" depending on whether this ObjectHolder has a
* name.
*/
QString selectStatement() const;
};
#endif
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