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/*
* $Revision: 3367 $
*
* last checkin:
* $Author: gutwenger $
* $Date: 2013-04-04 16:29:19 +0200 (Thu, 04 Apr 2013) $
***************************************************************/
/** \file
* \brief Declaration of interface for planar layout algorithms
* (used in planarization approach).
*
* \author Carsten Gutwenger
*
* \par License:
* This file is part of the Open Graph Drawing Framework (OGDF).
*
* \par
* Copyright (C)<br>
* See README.txt in the root directory of the OGDF installation for details.
*
* \par
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* Version 2 or 3 as published by the Free Software Foundation;
* see the file LICENSE.txt included in the packaging of this file
* for details.
*
* \par
* 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.
*
* \par
* 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.
*
* \see http://www.gnu.org/copyleft/gpl.html
***************************************************************/
#ifdef _MSC_VER
#pragma once
#endif
#ifndef OGDF_LAYOUT_PLANREP_MODULE_H
#define OGDF_LAYOUT_PLANREP_MODULE_H
#include <ogdf/planarity/PlanRep.h>
#include <ogdf/basic/Layout.h>
namespace ogdf {
//! Interface for planar layout algorithms (used in the planarization approach).
/**
* \see PlanarizationLayout
*/
class OGDF_EXPORT LayoutPlanRepModule {
public:
//! Initializes a planar layout module.
LayoutPlanRepModule() { }
//! Destructor.
virtual ~LayoutPlanRepModule() { }
//! Computes a planar layout of \a PG in \a drawing.
/**
* Must be overridden by derived classes. The implementation must also set
* m_boundingBox, which gives the bounding box of the computed layout.
*
* @param PG is the input planarized representation which may be modified.
* @param adjExternal is an adjacenty entry on the external face.
* @param drawing is the computed layout of \a PG.
*/
virtual void call(PlanRep &PG,
adjEntry adjExternal,
Layout &drawing) = 0;
//! Computes a planar layout of \a PG in \a drawing.
void operator()(PlanRep &PG, adjEntry adjExternal, Layout &drawing) {
call(PG,adjExternal,drawing);
}
//! Returns the bounding box of the computed layout.
const DPoint &getBoundingBox() const {
return m_boundingBox;
}
//! Returns the minimal allowed distance between edges and vertices.
virtual double separation() const = 0;
//! Sets the minimal allowed distance between edges and vertices to \a sep.
virtual void separation(double sep) = 0;
protected:
//! Stores the bounding box of the computed layout.
/**
* <b>Must be set by derived algorithms!</b>
*/
DPoint m_boundingBox;
//! Computes and sets the bounding box variable \a m_boundingBox.
/**
* An algorithm can call setBoundingBox() for setting the
* m_boundingBox variable if no faster implementation is available.
*/
void setBoundingBox(PlanRep &PG, Layout &drawing) {
m_boundingBox = drawing.computeBoundingBox(PG);
}
OGDF_MALLOC_NEW_DELETE
};
} // end namespace ogdf
#endif
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