#ifndef XLINKOBJ_H

#define XLINKOBJ_H

#include "linkablemapobj.h"

class BranchObj;

enum XLinkState {undefinedXLink,initXLink,activeXLink,deleteXLink};

/*! \brief xlinks are used to draw arbitrary connections between branches (BranchObj) in the map. */

/////////////////////////////////////////////////////////////////////////////

class XLinkObj:public MapObj {

public:

    XLinkObj ();

    XLinkObj (QGraphicsScene*);

    ~XLinkObj ();

    virtual void init ();

    virtual void copy (XLinkObj*);

	void setBegin (BranchObj*);

	BranchObj* getBegin();

	void setEnd   (BranchObj*);

	void setEnd   (QPointF);

	BranchObj* getEnd();

	void setColor(QColor);

	QColor getColor();

	void setWidth (int);

	int getWidth ();

	bool activate ();			// Sets pointers in branchObjects

	void deactivate();			// removes those pointers

	bool isUsed();				// true, if at least on branch uses it

	void updateXLink();

	BranchObj* otherBranch (BranchObj*);

	void positionBBox();

	void calcBBoxSize();

	void setVisibility (bool);

	void setVisibility ();

	QString saveToDir ();

private:

	static int arrowSize;

	QPen pen;

	QColor color;

	int width;

	QGraphicsLineItem *line;

	QGraphicsPolygonItem *poly;

	BranchObj *beginBranch;

	BranchObj *endBranch;

	BranchObj *visBranch;	// the "visible" part of a partially scrolled link

	XLinkState xLinkState;	// init during drawing or active

	QPointF beginPos;

	QPointF   endPos;

};

#endif