#include <math.h>

 #include "linkablemapobj.h"

 #include "branchobj.h"

 #include "mapeditor.h"

 #include "version.h"

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

 // LinkableMapObj

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

 LinkableMapObj::LinkableMapObj():MapObj()

 {

   //  cout << "Const LinkableMapObj ()\n";

     init ();

 }

 LinkableMapObj::LinkableMapObj(QCanvas* c) :MapObj(c)

 {

 //    cout << "Const LinkableMapObj\n";

     init ();

 }

 LinkableMapObj::LinkableMapObj (LinkableMapObj* lmo) : MapObj (lmo->canvas)

 {

     copy (lmo);

 }

 LinkableMapObj::~LinkableMapObj()

 {

     delete (bottomline);

     delete (selbox);

 	delete (frame);

 	delLink();

 }

 void LinkableMapObj::delLink()

 {

 	switch (style)

 	{

 		case StyleLine:

 			delete (l);

 			break;

 		case StyleParabel:

 			segment.clear();

 			break;

 		case StylePolyLine:

 			delete (p);

 			delete (l);

 			break;

 		case StylePolyParabel:

 			delete (p);

 			segment.clear();

 			break;

 		default:

 			break;

 	}		

 }

 void LinkableMapObj::init ()

 {

     depth=-1;	

     childObj=NULL;

     parObj=NULL;

     parObjTmpBuf=NULL;

     parPos=QPoint(0,0);

     childPos=QPoint(0,0);

 	link2ParPos=false;

     l=NULL;

     orientation=OrientUndef;

     linkwidth=20;		

 	thickness_start=8;

     style=StyleUndef;

 	linkpos=LinkBottom;

     segment.setAutoDelete (TRUE);

     arcsegs=13;

 	QPointArray pa(arcsegs*2+2);

     bottomline=new QCanvasLine(canvas);

     bottomline->setPen( QPen(linkcolor, 1) );

     bottomline->setZ(Z_LINK);

     bottomline->show();

     // Prepare showing the selection of a MapObj

     selbox = new QCanvasRectangle (canvas);

     selbox->setZ(Z_SELBOX);

     selbox->setBrush( QColor(255,255,0) );

     selbox->setPen( QPen(QColor(255,255,0) ));

     selbox->hide();

     selected=false;

 	hideLinkUnselected=false;

 	// initialize frame

 	frame = new FrameObj (canvas);

 	repositionRequest=false;

 }

 void LinkableMapObj::copy (LinkableMapObj* other)

 {

     MapObj::copy(other);

 	bboxTotal=other->bboxTotal;

     setLinkStyle(other->style);

     setLinkColor (other->linkcolor);

 }

 void LinkableMapObj::setChildObj(LinkableMapObj* o)

 {

     childObj=o;

 }

 void LinkableMapObj::setParObj(LinkableMapObj* o)

 {

     parObj=o;

 	mapEditor=parObj->getMapEditor();

 }

 void LinkableMapObj::setParObjTmp(LinkableMapObj*,QPoint,int)

 {

 }

 void LinkableMapObj::unsetParObjTmp()

 {

 }

 LinkStyle LinkableMapObj::getDefLinkStyle ()

 {

 	LinkStyle ls=mapEditor->getLinkStyle();

 	switch (ls)

 	{

 		case StyleLine: 

 			return ls;

 			break;

 		case StyleParabel:

 			return ls;

 			break;

 		case StylePolyLine:	

 			if (depth>1)

 				return StyleLine;

 			else	

 				return ls;

 			break;

 		case StylePolyParabel:	

 			if (depth>1)

 				return StyleParabel;

 			else	

 				return ls;

 			break;

 		default: 

 			break;	

 	}	

 	return StyleUndef;

 }

 void LinkableMapObj::setLinkStyle(LinkStyle newstyle)

 {

 	//if (newstyle=style) return;

 	delLink();

 	style=newstyle;

     if (childObj!=NULL && parObj != NULL)

     {

 		int i;

 		QCanvasLine* cl;

 		switch (style)

 		{

 			case StyleUndef:

 				bottomline->hide();

 				break;

 			case StyleLine: 

 				l = new QCanvasLine(canvas);

 				l->setPen( QPen(linkcolor, 1) );

 				l->setZ(Z_LINK);

 				if (visible)

 					l->show();

 				else

 					l->hide();

 				break;

 			case StyleParabel:

 				for (i=0;i<arcsegs;i++)

 				{

 					cl = new QCanvasLine(canvas);

 					cl->setPen( QPen(linkcolor, 1) );

 					cl->setPoints( 0,0,i*10,100);

 					cl->setZ(Z_LINK);

 					if (visible)

 						cl->show();

 					else

 						cl->hide();

 					segment.append(cl);

 				}

 				pa0.resize (arcsegs+1);

 				break;

 			case StylePolyLine:	

 				p = new QCanvasPolygon(canvas);

 				p->setBrush( linkcolor );

 				p->setZ(Z_LINK);

 				if (visible)

 					p->show();

 				else

 					p->hide();

 				pa0.resize (3);

 				// TODO

 				// a bit awkward: draw the lines additionally to polygon, to avoid

 				// missing pixels, when polygon is extremly flat

 				l = new QCanvasLine(canvas);

 				l->setPen( QPen(linkcolor, 1) );

 				l->setZ(Z_LINK);

 				if (visible)

 					l->show();

 				else

 					l->hide();

 				break;

 			case StylePolyParabel:	

 				p = new QCanvasPolygon(canvas);

 				p->setBrush( linkcolor );

 				p->setZ(Z_LINK);

 				if (visible)

 					p->show();

 				else

 					p->hide();

 				pa0.resize (arcsegs*2+2);

 				pa1.resize (arcsegs+1);

 				pa2.resize (arcsegs+1);

 				// TODO

 				// a bit awkward: draw the lines additionally 

 				// to polygon, to avoid missing pixels, 

 				// if polygon is extremly flat

 				for (i=0;i<arcsegs;i++)

 				{

 					cl = new QCanvasLine(canvas);

 					cl->setPen( QPen(linkcolor, 1) );

 					cl->setPoints( 0,0,i*10,100);

 					cl->setZ(Z_LINK);

 					if (visible)

 						cl->show();

 					else

 						cl->hide();

 					segment.append(cl);

 				}

 				break;

 			default: 

 				break;	

 		}	

 		// FIXME updateLink is usually called (multiple times) later:

 		//updateLink();

 	} else

 	{

 		qWarning ("Error: ChildObj or parObj == NULL in LinkableMapObj::setLinkStyle\n");

 	}

 }

 LinkStyle LinkableMapObj::getLinkStyle()

 {

 	return style;

 }

 void LinkableMapObj::setHideLinkUnselected(bool b)

 {

 	hideLinkUnselected=b;

 	setVisibility (visible);

 	updateLink();

 }

 bool LinkableMapObj::getHideLinkUnselected()

 {

 	return hideLinkUnselected;

 }

 void LinkableMapObj::setLinkPos(LinkPos lp)

 {

 	linkpos=lp;

 }

 LinkPos LinkableMapObj::getLinkPos()

 {

 	return linkpos;

 }

 void LinkableMapObj::setLinkColor()

 {

 	// Overloaded in BranchObj and childs

 	// here only set default color

 	setLinkColor (mapEditor->getDefLinkColor());

 }

 void LinkableMapObj::setLinkColor(QColor col)

 {

 	linkcolor=col;

     bottomline->setPen( QPen(linkcolor, 1) );

 	QCanvasLine *cl;

 	switch (style)

 	{

 		case StyleLine:

 			l->setPen( QPen(col,1));

 			break;	

 		case StyleParabel:	

 			for (cl=segment.first(); cl; cl=segment.next() )

 				cl->setPen( QPen(col,1));

 			break;

 		case StylePolyLine:

 			p->setBrush( QBrush(col));

 			l->setPen( QPen(col,1));

 			break;

 		case StylePolyParabel:	

 			p->setBrush( QBrush(col));

 			for (cl=segment.first(); cl; cl=segment.next() )

 				cl->setPen( QPen(col,1));

 			break;

 		default:

 			break;

 	} // switch (style)	

 }

 QColor LinkableMapObj::getLinkColor()

 {

 	return linkcolor;

 }

 FrameType LinkableMapObj::getFrameType()

 {

 	return frame->getFrameType();

 }

 void LinkableMapObj::setFrameType(const FrameType &t)

 {

 	frame->setFrameType(t);

 	calcBBoxSize();

 	positionBBox();

 	requestReposition();

 }

 void LinkableMapObj::setFrameType(const QString &t)

 {

 	frame->setFrameType(t);

 	calcBBoxSize();

 	positionBBox();

 	requestReposition();

 }

 void LinkableMapObj::setVisibility (bool v)

 {

 	QCanvasLine* cl;

 	MapObj::setVisibility (v);

 	bool visnow=visible;

 	if (hideLinkUnselected && !selected)

 		visnow=false;

 	if (visnow) 

 	{

 		bottomline->show();

 		switch (style)

 		{

 			case StyleLine:

 				if (l) l->show();

 				break;

 			case StyleParabel:	

 				for (cl=segment.first(); cl; cl=segment.next() )

 					cl->show();

 				break;	

 			case StylePolyLine:

 				if (p) p->show();

 				if (l) l->show();

 				break;

 			case StylePolyParabel:	

 				for (cl=segment.first(); cl; cl=segment.next() )

 					cl->show();

 				if (p) p->show();

 				break;

 			default:

 				break;

 		}

 	} else 

 	{

 		bottomline->hide();

 		switch (style)

 		{

 			case StyleLine:

 				if (l) l->hide();

 				break;

 			case StyleParabel:	

 				for (cl=segment.first(); cl; cl=segment.next() )

 					cl->hide();

 				break;	

 			case StylePolyLine:

 				if (p) p->hide();

 				if (l) l->hide();

 				break;

 			case StylePolyParabel:	

 				for (cl=segment.first(); cl; cl=segment.next() )

 					cl->hide();

 				if (p) p->hide();

 				break;

 			default:

 				break;

 		}

 	}	

 }

 void LinkableMapObj::updateLink()

 {

     // needs:

     //	childPos of parent

     //	orient   of parent

     //	style

     // 

     // sets:

     //	orientation

     //	childPos

     //	parPos

 	//  offset

     //	drawing of the link itself

 	// updateLink is called from move, but called from constructor we don't

 	// have parents yet...

 	if (style==StyleUndef) return;	

 	if (frame->getFrameType() == NoFrame)

 		linkpos=LinkBottom;

 	else	

 		linkpos=LinkMiddle;

 	switch (linkpos)

 	{

 		case LinkMiddle:

 			offset=bbox.height() /2;

 			break;

 		default :

 			offset=bbox.height()-1;			// draw link to bottom of bbox

 			break;

 	}

     double p2x,p2y;								// Set P2 Before setting

 	if (!link2ParPos)

 	{

 		p2x=QPoint( parObj->getChildPos() ).x();	// P1, we have to look at

 		p2y=QPoint( parObj->getChildPos() ).y();	// orientation

 	} else	

 	{

 		p2x=QPoint( parObj->getParPos() ).x();	

 		p2y=QPoint( parObj->getParPos() ).y();

 	} 

 	LinkOrient orientOld=orientation;

     // Set orientation, first look for orientation of parent

     if (parObj->getOrientation() != OrientUndef ) 

 		// use the orientation of the parent:

 		orientation=parObj->getOrientation();

     else

     {

 		// calc orientation depending on position rel to mapCenter

 		if (absPos.x() < QPoint(parObj->getChildPos() ).x() )

 			orientation=OrientLeftOfCenter; 

 		else

 			orientation=OrientRightOfCenter;

     }

 	if ((orientation!=orientOld) && (orientOld!= OrientUndef))

 	{

 		// Orientation just changed. Reorient this subbranch, because move is called

 		// before updateLink => Position is still the old one, which could lead to 

 		// linking of subranch to itself => segfault

 		//

 		// Also possible: called in BranchObj::init(), then orientOld==OrientUndef,

 		// no need to reposition now

 		reposition();

 	}

     if (orientation==OrientLeftOfCenter )

     {

 		childPos=QPoint (absPos.x(),absPos.y()+offset);

 		parPos=QPoint (absPos.x()+ bbox.width(), absPos.y() + offset );

     } else

     {

 		childPos=QPoint (absPos.x()+ bbox.width(), absPos.y() + offset ); 

 		parPos=QPoint (absPos.x(),absPos.y()+offset);

     }

 	double p1x=parPos.x();	// Link is drawn from P1 to P2

 	double p1y=parPos.y();

 	double vx=p2x - p1x;	// V=P2-P1

 	double vy=p2y - p1y;

 	// Draw the horizontal line below heading (from ChildPos to ParPos)

 	bottomline->setPoints (qRound(childPos.x()),

 		qRound(childPos.y()),

 		qRound(p1x),

 		qRound(p1y) );

 	double a;	// angle

 	if (vx > -0.000001 && vx < 0.000001)

 		a=M_PI_2;

 	else

 		a=atan( vy / vx );

 	// "turning point" for drawing polygonal links

 	QPoint tp (-qRound(sin (a)*thickness_start), qRound(cos (a)*thickness_start));	

 	QCanvasLine *cl;

 	int i;

     // Draw the link

 	switch (style)

 	{

 		case StyleLine:

 			l->setPoints( qRound (parPos.x()),

 				qRound(parPos.y()),

 				qRound(p2x),

 				qRound(p2y) );

 			break;	

 		case StyleParabel:	

 			parabel (pa0, p1x,p1y,p2x,p2y);

 			i=0;

 			for (cl=segment.first(); cl; cl=segment.next() )

 			{	

 				cl->setPoints( pa0.point(i).x(), pa0.point(i).y(),pa0.point(i+1).x(),pa0.point(i+1).y());

 				i++;

 			}

 			break;

 		case StylePolyLine:

 			pa0[0]=QPoint (qRound(p2x+tp.x()), qRound(p2y+tp.y()));

 			pa0[1]=QPoint (qRound(p2x-tp.x()), qRound(p2y-tp.y()));

 			pa0[2]=QPoint (qRound (parPos.x()), qRound(parPos.y()) );

 			p->setPoints (pa0);

 			// here too, draw line to avoid missing pixels

 			l->setPoints( qRound (parPos.x()),

 				qRound(parPos.y()),

 				qRound(p2x),

 				qRound(p2y) );

 			break;

 		case StylePolyParabel:	

 			parabel (pa1, p1x,p1y,p2x+tp.x(),p2y+tp.y());

 			parabel (pa2, p1x,p1y,p2x-tp.x(),p2y-tp.y());

 			for (i=0;i<=arcsegs;i++)

 			{

 				// Combine the arrays to a single one

 				pa0[i]=pa1[i];

 				pa0[i+arcsegs+1]=pa2[arcsegs-i];

 			}	

 			p->setPoints (pa0);

 			i=0;

 			for (cl=segment.first(); cl; cl=segment.next() )

 			{	

 				cl->setPoints( pa1.point(i).x(), pa1.point(i).y(),pa1.point(i+1).x(),pa1.point(i+1).y());

 				i++;

 			}

 			break;

 		default:

 			break;

 	} // switch (style)	

 }

 LinkableMapObj* LinkableMapObj::getChildObj()

 {

     return childObj;

 }

 LinkableMapObj* LinkableMapObj::getParObj()

 {

     return parObj;

 }

 LinkableMapObj* LinkableMapObj::findObjBySelect (QString s)

 {

 	LinkableMapObj *lmo=this;

 	QString part;

 	QString typ;

 	QString num;

 	while (!s.isEmpty() )

 	{

 		part=s.section(",",0,0);

 		typ=part.left (3);

 		num=part.right(part.length() - 3);

 		if (typ=="mc:")

 		{

 			if (depth>0)

 				return false;	// in a subtree there is no center

 			else

 				break;

 		} else

 			if (typ=="bo:")

 				lmo=((BranchObj*)(lmo))->getBranchNum (num.toUInt());

 			else

 				if (typ=="fi:")

 					lmo=((BranchObj*)(lmo))->getFloatImageNum (num.toUInt());

 		if (!lmo) break;

 		if (s.contains(","))

 			s=s.right(s.length() - part.length() -1 );

 		else	

 			break;

 	}

 	return lmo;

 }

 QPoint LinkableMapObj::getChildPos()

 {

     return childPos;

 }

 QPoint LinkableMapObj::getParPos()

 {

     return parPos;

 }

 QPoint LinkableMapObj::getRelPos()

 {

 	if (!parObj) return QPoint (0,0);

     return QPoint(

 		absPos.x() - parObj->x(),

 		absPos.y() - parObj->y()

 	);

 }

 LinkOrient LinkableMapObj::getOrientation()

 {

     return orientation;

 }

 int LinkableMapObj::getDepth()

 {

     return depth;

 }

 void LinkableMapObj::setMapEditor (MapEditor *me)

 {

 	mapEditor=me;

 }

 MapEditor* LinkableMapObj::getMapEditor ()

 {

 	return mapEditor;

 }

 QPoint LinkableMapObj::getRandPos()

 {

 	// Choose a random position with given distance to parent:

 	double a=rand()%360 * 2 * M_PI / 360;

     return QPoint ( (int)( + 150*cos (a)),

                     (int)( + 150*sin (a)));

 }

 void LinkableMapObj::alignRelativeTo (QPoint ref)

 {

 	cout << "LMO::alignRelTo   ref="<<ref<<endl;

 	//FIXME 

 }

 void LinkableMapObj::reposition()

 {

 	if (depth==0)

 	{

 		// only calculate the sizes once. If the deepest LMO changes its height,

 		// all upper LMOs have to change, too.

 		calcBBoxSizeWithChilds();

 	    alignRelativeTo ( QPoint (absPos.x(),

 							absPos.y()-(bboxTotal.height()-bbox.height())/2) );

 	} else

 	{

 		// This is only important for moving branches:

 		// For editing a branch it isn't called...

 	    alignRelativeTo ( QPoint (absPos.x(),

 							absPos.y()-(bboxTotal.height()-bbox.height())/2) );

 	}

 }

 void LinkableMapObj::requestReposition()

 {

 	if (!repositionRequest)

 	{

 		// Pass on the request to parental objects, if this hasn't

 		// been done yet

 		repositionRequest=true;

 		if (parObj) parObj->requestReposition();

 	}

 }

 void LinkableMapObj::forceReposition()

 {

 	// Sometimes a reposition has to be done immediatly: For example

 	// if the note editor flag changes, there is no user event in mapeditor

 	// which could collect requests for a reposition.

 	// Then we have to call forceReposition()

 	// But no rule without exception: While loading a map or undoing it,

 	// we want to block expensive repositioning, but just do it once at

 	// the end, thus check first:

 	if (mapEditor->isRepositionBlocked()) return;

 	// Pass on the request to parental objects, if this hasn't been done yet

 	if (parObj) 

 		parObj->forceReposition(); 

 	else 

 		reposition(); 

 }

 bool LinkableMapObj::repositionRequested()

 {

 	return repositionRequest;

 }

 void LinkableMapObj::setSelBox()

 {

     selbox->setX (bbox.x() );

     selbox->setY (bbox.y() );

     selbox->setSize (bbox.width(), bbox.height() );

 }

 void LinkableMapObj::select()

 {

 	setSelBox();

     selected=true;

     selbox->show();

 	setVisibility (visible);

 }

 void LinkableMapObj::unselect()

 {

     selected=false;

     selbox->hide();

 	setVisibility (visible);

 }

 void LinkableMapObj::parabel (QPointArray &ya, double p1x, double p1y, double p2x, double p2y)

 {

 	double vx=p2x - p1x;	// V=P2-P1

 	double vy=p2y - p1y;

 	double dx;				// delta x during calculation of parabel

 	double pnx;				// next point

 	double pny;

 	double m;

 	if (vx > -0.0001 && vx < 0.0001)

 		m=0;

 	else	

 		m=(vy / (vx*vx));

 	dx=vx/(arcsegs);

 	int i;

 	ya.setPoint (0,QPoint (qRound(p1x),qRound(p1y)));

 	for (i=1;i<=arcsegs;i++)

 	{	

 		pnx=p1x+dx;

 		pny=m*(pnx-parPos.x())*(pnx-parPos.x())+parPos.y();

 		ya.setPoint (i,QPoint (qRound(pnx),qRound(pny)));

 		p1x=pnx;

 		p1y=pny;

 	}	

 }

 QString LinkableMapObj::getLinkAttr ()

 {

 	QString hideAttr;

 	if (hideLinkUnselected)

 		// Since this is currently the

 		// only attribut and it is switched off by default

 		// don't write <link>  at all if it is missing

 		return attribut ("hideLinkUnselected","true");

 	else

 		return "";

 }