#ifndef LINKOBJ_H

#define LINKOBJ_H

#include "linkablemapobj.h"

enum LinkState {undefinedLink,initLink,activeLink,deleteLink};

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

class LinkObj:public MapObj {

public:

    LinkObj ();

    LinkObj (QCanvas*);

    ~LinkObj ();

    virtual void init ();

    virtual void copy (LinkObj*);

	void setBegin (BranchObj*);

	void setEnd   (BranchObj*);

	void setEnd   (QPoint);

	bool activate ();			// Sets pointers in branchObjects

	void deactivate();			// removes those pointers

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

	void updateLink();

	BranchObj* otherBranch (BranchObj*);

	void positionBBox();

	void calcBBoxSize();

	void setVisibility (bool);

private:

	QCanvasLine *line;

	BranchObj *beginBranch;

	BranchObj *endBranch;

	LinkState linkState;	// init during drawing or active

	QPoint beginPos;

	QPoint   endPos;

};

#endif