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/*
* vim: ts=4 sw=4 et tw=0 wm=0
*
* libavoid - Fast, Incremental, Object-avoiding Line Router
* Copyright (C) 2004-2006 Michael Wybrow <mjwybrow@users.sourceforge.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* 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 AVOID_REGION_H
#define AVOID_REGION_H
namespace Avoid {
class ShapeRef;
typedef std::list<int> ShapeList;
class Region
{
public:
Region();
Region(double x1, double y1, double x2, double y2);
bool overlapCheck(BBox& bbox, unsigned int& p);
void getBBox(BBox& bb);
Region *up(void);
Region *down(void);
Region *left(void);
Region *right(void);
void initialSplit(BBox& bbox, unsigned int pos, unsigned int& shapeId);
bool isBlock(void);
static void pairHor(Region *l, Region *r);
static void pairVer(Region *a, Region *b);
static void addShape(ShapeRef *shape);
static void removeShape(ShapeRef *shape);
static Region *getTopLeftRegion(void);
private:
BBox _bbox;
Region *_left;
Region *_right;
Region *_up;
Region *_down;
ShapeList _blocks;
Region *split(double pos, unsigned int dir);
void merge(unsigned int dir);
void mergeRegion(Region *src);
Region *findRegion(double pos, unsigned int dir,
const bool forMerge = false);
Region *splitDir(double pos, unsigned int dir, bool first = false);
void mergeDir(unsigned int dir, bool first = false);
void copyAttributes(Region *src);
void mergeAttributes(Region *src);
bool safeToMerge(unsigned int dir);
bool unsafeToMerge(unsigned int dir);
};
}
#endif
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