#ifndef LINKABLEMAPOBJ_H

#define LINKABLEMAPOBJ_H

#include "animpoint.h"

#include "noteobj.h"

#include "headingobj.h"

#include "flagrowobj.h"

#include "treeitem.h"

#define MAX_DEPTH 999

class VymModel;

/*! \brief This class adds links to MapObj 

The links are connecting the branches (BranchObj) and images (FloatImageObj) in the map.

*/

class LinkableMapObj:public QObject, public MapObj {

	Q_OBJECT		// FIXME-3 really needed here?

public:

	/*! Orientation of an object depends on the position relative to the parent */

	enum Orientation {

		UndefinedOrientation, //!< Undefined

		LeftOfCenter,			//!< Object is left of center

		RightOfCenter			//!< Object is right of center

	};

	/*! Various drawing styles for links */

	enum Style {

		UndefinedStyle,	//!< Undefined

		Line,			//!< Straight line

		Parabel,		//!< Parabel

		PolyLine,		//!< Polygon (thick line)

		PolyParabel		//!< Thick parabel

	};

	/*! Vertical position of link in object */

	enum Position {

		Middle, //!< Link is drawn in the middle of object

		Bottom  //!< Link is drawn at bottom of object

	};

	/*! Hint if link should use the default link color or the color of heading */

	enum ColorHint {

		DefaultColor,	//!< Link uses the default color

		HeadingColor	//!< Link uses the color of heading

	};

    LinkableMapObj ();

    LinkableMapObj (QGraphicsScene*);

    LinkableMapObj (LinkableMapObj*);

    ~LinkableMapObj ();

	virtual void delLink();

    virtual void init ();

    virtual void copy (LinkableMapObj*);

	virtual void setTreeItem(TreeItem *);

	virtual TreeItem* getTreeItem() const;

    void setChildObj (LinkableMapObj*);

    virtual void setParObj (LinkableMapObj*);

    virtual void setParObjTmp (LinkableMapObj*,QPointF,int);	// Only for moving Obj around

	virtual void unsetParObjTmp();						// reuse original ParObj

	virtual bool hasParObjTmp();

	virtual void setUseRelPos (const bool&);

	virtual void setRelPos();				// set relPos to current parentPos

	virtual void setRelPos(const QPointF&);	

	virtual QPointF getRelPos();

	virtual qreal getTopPad();

	virtual qreal getLeftPad();

	virtual qreal getRightPad();

	Style getDefLinkStyle(TreeItem *parent);

    void setLinkStyle(Style);            

	Style getLinkStyle();

	void setHideLinkUnselected();

	void setLinkPos (Position);

	Position getLinkPos ();

	virtual void setLinkColor();			// sets color according to colorhint, overloaded

	virtual void setLinkColor(QColor);

	QColor getLinkColor();

	virtual void setVisibility (bool);

	virtual void setOrientation();

    virtual void updateVisibility();		//! hides/unhides link depending on selection

    /*! update parPos, childPos 

		depending on pos

		redraw link with given style */

    virtual void updateLinkGeometry();		

    LinkableMapObj* getChildObj();			// returns pointer to fromObj

    LinkableMapObj* getParObj();			// returns pointer to toObj

	virtual void setDockPos()=0;				// sets childPos and parPos

    QPointF getChildPos();					// returns pos where children dock

    QPointF getParPos();						// returns pos where parents dock

    Orientation getOrientation();			// get orientation

	virtual QPointF getRandPos();			// make randomised position

	virtual void reposition();

	virtual void requestReposition();		// do reposition after next user event

	virtual void forceReposition();			// to force a reposition now (outside

											// of mapeditor e.g. in noteeditor

	virtual bool repositionRequested();

	virtual void calcBBoxSizeWithChildren()=0;// calc size of  BBox including children recursivly

protected:

	void parabel(QPolygonF &,double,double,double,double);	// Create Parabel connecting two points

    QPointF childPos;

    QPointF parPos;

	bool link2ParPos;				// While moving around, sometimes link to parent

    Orientation orientation;     

    qreal linkwidth;				// width of a link

	QRectF bboxTotal;				// bounding box including children

    LinkableMapObj* parObj;		

    LinkableMapObj* parObjTmpBuf;	// temporary buffer the original parent

    qreal bottomlineY;              // vertical offset of dockpos to pos

	int thickness_start;			// for StylePoly*	

    Style style;					// Current style

	Position linkpos;				// Link at bottom of object or middle of height

    QColor linkcolor;               // Link color

	QPen pen;

    QGraphicsLineItem* l;           // line style

	QGraphicsPolygonItem* p;		// poly styles

    int arcsegs;                    // arc: number of segments

    QList <QGraphicsLineItem*> segment; // a part of e.g. the parabel

	QPolygonF pa0;					// For drawing of PolyParabel and PolyLine

	QPolygonF pa1;					// For drawing of PolyParabel 

	QPolygonF pa2;					// For drawing of PolyParabel	

    QGraphicsLineItem* bottomline;  // on bottom of BBox

	bool repositionRequest;			// 

	qreal topPad, botPad,

		leftPad, rightPad;          // padding within bbox

	QPointF	 relPos;				// position relative to childPos of parent

	bool useRelPos;

	TreeItem *treeItem;				// Crossrefence to treemodel

};

#endif