#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);

 	void setVisibility ();

 private:

 	QCanvasLine *line;

 	BranchObj *beginBranch;

 	BranchObj *endBranch;

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

 	LinkState linkState;	// init during drawing or active

 	QPoint beginPos;

 	QPoint   endPos;

 };

 #endif