#ifndef LINKABLEMAPOBJ_H

#define LINKABLEMAPOBJ_H

#include "noteobj.h"

#include "headingobj.h"

#include "flagrowobj.h"

#define MAX_DEPTH 999

enum LinkOrient {OrientUndef,OrientLeftOfCenter, OrientRightOfCenter};

enum LinkStyle {

	StyleUndef,

	StyleLine, 

	StyleParabel, 

	StylePolyLine,

	StylePolyParabel

};

enum LinkPos {LinkMiddle,LinkBottom};

enum LinkColorHint {DefaultColor,HeadingColor};

class LinkableMapObj:public QObject, public MapObj {

	Q_OBJECT

public:

    LinkableMapObj ();

    LinkableMapObj (QGraphicsScene*);

    LinkableMapObj (LinkableMapObj*);

    ~LinkableMapObj ();

	virtual void delLink();

    virtual void init ();

    virtual void copy (LinkableMapObj*);

    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 void setUseOrientation (const bool &);

	virtual qreal getTopPad();

	virtual qreal getLeftPad();

	virtual qreal getRightPad();

	LinkStyle getDefLinkStyle();

    void setLinkStyle(LinkStyle);            

	LinkStyle getLinkStyle();

	void setHideLinkUnselected(bool);

	bool getHideLinkUnselected();

	void setLinkPos (LinkPos);

	LinkPos 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 updateLink();				// update parPos and childPos

											// depending on pos

											// redraw link with given style

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

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

    virtual LinkableMapObj* findObjBySelect(QString s);	// find obj by selectstring

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

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

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

    LinkOrient getOrientation();			// get orientation

    virtual int getDepth();					// return depth

	virtual void setMapEditor(MapEditor*);	// set MapEditor (needed in LMO::updateNoteFlag)

	virtual MapEditor* getMapEditor();		// get MapEditor (usually from parent);

	virtual QPointF getRandPos();			// make randomised position

    //virtual void alignRelativeTo(const QPointF );

	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 QRectF getTotalBBox();			// return BBox including childs			

	//virtual QRectF getBBoxSizeWithChilds();// return size of BBox including childs  

	virtual void calcBBoxSizeWithChilds()=0;// calc size of  BBox including childs recursivly

    virtual void select();

    virtual void unselect();

	virtual	QString getSelectString()=0;

	//virtual QString saveToDir (const QString&,const QString&, const QPointF&);// Save data to XML

protected:

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

	QString getLinkAttr();

    QPointF childPos;

    QPointF parPos;

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

	MapEditor* mapEditor;			// for and toggleScroll(), get default styles

									// and mapEditor->updateActions()

									// and mapEditor->updateSelection()

    LinkOrient orientation;     

    qreal linkwidth;				// width of a link

    int depth;						// depth: undef=-1 mapCenter=0 branch=1..n

	QRectF bboxTotal;				// bounding box including childs

    LinkableMapObj* childObj;

    LinkableMapObj* parObj;

    LinkableMapObj* parObjTmpBuf;	// temporary buffer the original parent

    qreal bottomlineY;              // vertical offset of dockpos to pos

	int thickness_start;			// for StylePoly*	

    LinkStyle style;				// Current style

	LinkPos 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;			// 

	bool selected;					// Used for marking the selection

	bool hideLinkUnselected;		// to hide links if unselected

	qreal topPad, botPad,

		leftPad, rightPad;          // padding within bbox

	QPointF relPos;					// position relative to childPos of parent

	bool useRelPos;

	bool useOrientation;

};

#endif