#include <QGraphicsScene>

#include "xlinkitem.h"

#include "branchitem.h"

#include "linkablemapobj.h"

#include "vymmodel.h"

#include "xlinkobj.h"

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

// XLinkItem

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

XLinkItem::XLinkItem (const QList<QVariant> &data, TreeItem *parent):MapItem (data,parent)

{

	//cout << "Const XLinkItem () "<<this<<endl;

	init();

}

XLinkItem::~XLinkItem ()

{

	//cout << "Destr XLinkItem "<<this<<"  lmo="<<lmo<<endl;

	if (lmo)

	{

		//cout <<" calling delete (lmo)\n"; 

		delete (lmo);

	}

	if (partnerXLink)

	{

		// Also delete partner 

		//cout << "  deleting partner="<<partnerXLink<<endl;

		partnerXLink->partnerXLink=NULL;	// avoid endless recusion

		model->deleteItem (partnerXLink);

	}

}

void XLinkItem::init () 

{

	setType (XLink);

	beginBranch=NULL;

	endBranch=NULL;

	partnerXLink=NULL;

	isBeginXLink=true;

	xLinkState=XLinkItem::undefinedXLink;

	color=QColor (180,180,180);

	width=1;

}

void XLinkItem::setBegin (BranchItem *bi)

{

	if (bi) 

	{

		xLinkState=initXLink;

		beginBranch=bi;

	}	

}

BranchItem* XLinkItem::getBegin ()

{

	return beginBranch;

}

void XLinkItem::setEnd (BranchItem *bi)

{

	if (bi) 

	{

		xLinkState=initXLink;

		endBranch=bi;

	}		

}

BranchItem* XLinkItem::getEnd()

{

	return endBranch;

}

void XLinkItem::setWidth (int w)

{

	if (isBeginXLink)

	{

		width=w;

		if (lmo) ((XLinkObj*)lmo)->updateXLink();

		return;

	}

	if (partnerXLink)

		partnerXLink->setWidth (w);

}

int XLinkItem::getWidth()

{

	if (isBeginXLink) return width;

	if (partnerXLink)

		return partnerXLink->getWidth();

	else

		return -1;

}

void XLinkItem::setColor(QColor c)

{

	if (isBeginXLink)

	{

		color=c;

		if (lmo) ((XLinkObj*)lmo)->updateXLink();

		return;

	}	

	if (partnerXLink)

		partnerXLink->setColor (c);

}

QColor XLinkItem::getColor()

{

	if (isBeginXLink) return color;

	if (partnerXLink)

		return partnerXLink->getColor();

	else

		return QColor();

}

void XLinkItem::setEnd (QPointF p)

{

	if (lmo) ((XLinkObj*)lmo)->setEnd (p);

}

bool XLinkItem::activate ()	

{

	if (beginBranch && endBranch)

	{

		if (beginBranch==endBranch) return false;

		partnerXLink=model->createXLink (endBranch);

		partnerXLink->setBegin (beginBranch);

		partnerXLink->setEnd (endBranch);

		partnerXLink->partnerXLink=this;

		partnerXLink->isBeginXLink=false;

		xLinkState=activeXLink;

		partnerXLink->xLinkState=activeXLink;

		partnerXLink->setHeading ("xLink to: "+beginBranch->getHeading());

		setHeading ("xLink to: "+endBranch->getHeading());

		model->updateActions();

		return true;

	} else

		return false;

}

bool XLinkItem::isBegin()

{

	return isBeginXLink;

}

void XLinkItem::updateXLink()

{

	if(lmo && isBeginXLink) 

		((XLinkObj*)lmo)->updateXLink();

	else 

		if (partnerXLink) partnerXLink->updateXLink();

}

void XLinkItem::updateVisibility()

{

	if (lmo) lmo->updateVisibility();

}

BranchItem* XLinkItem::getPartnerBranch()

{

	if (!beginBranch && !endBranch)

		return NULL;

	if (isBeginXLink)

		return endBranch;

	else	

		return beginBranch;

}

BranchItem* XLinkItem::getOtherBranch(TreeItem *ti)

{

	BranchItem *pb=getPartnerBranch();

	if (!pb) return NULL;

	if (ti==beginBranch)

		return endBranch;

	else

		return beginBranch;

}

XLinkItem* XLinkItem::getPartnerXLink()

{

	return partnerXLink;

}

QString XLinkItem::saveToDir ()

{

	QString s="";

	if (beginBranch && endBranch && xLinkState==activeXLink)

	{

		if (beginBranch==endBranch )

			qWarning ("XLI::saveToDir  beginBranch==endBranch"); //FIXME-3	s=""

		else

		{

			QString colAttr=attribut ("color",color.name());

			QString widAttr=attribut ("width",QString().setNum(width,10));

			QString begSelAttr=attribut ("beginID",model->getSelectString(beginBranch));

			QString endSelAttr=attribut ("endID",  model->getSelectString(endBranch));

			s=beginElement ("xlink", colAttr +widAttr +begSelAttr +endSelAttr);

			s+=endElement ("xlink");

		}

	}

	return s;

}

XLinkObj* XLinkItem::createMapObj(QGraphicsScene *scene)  

{

	XLinkObj* xlo=new XLinkObj (scene,this);

	lmo=(LinkableMapObj*)xlo;

	return xlo;

}