xlinkobj.cpp
author insilmaril
Thu, 08 Nov 2007 15:28:03 +0000
changeset 620 24bfecc949a0
parent 532 50dc461a95e0
child 685 d788ebd97c45
permissions -rw-r--r--
1.11.2 split up of xml helper functions. started to work on attributes
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#include "xlinkobj.h"
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#include "branchobj.h"
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#include "mapeditor.h"
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/////////////////////////////////////////////////////////////////
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// XLinkObj
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/////////////////////////////////////////////////////////////////
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int XLinkObj::arrowSize=10;						// make instances 
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XLinkObj::XLinkObj ():MapObj() 
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{
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	//	cout << "Const XLinkObj ()\n";
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	init();
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}
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XLinkObj::XLinkObj (QGraphicsScene* s):MapObj(s)
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{
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	//	cout << "Const XLinkObj (s)  called from MapCenterObj (s)\n";
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	init();
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}
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XLinkObj::~XLinkObj ()
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{
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//	cout << "Destr XLinkObj\n";
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	if (xLinkState!=undefinedXLink)
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		deactivate();
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	delete (line);
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	delete (poly);
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}
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void XLinkObj::init () 
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{
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	beginBranch=NULL;
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	endBranch=NULL;
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	visBranch=NULL;
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	xLinkState=undefinedXLink;
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	color=QColor (180,180,180);
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	width=1;
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	pen.setColor (color);
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	pen.setWidth (width);
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	pen.setCapStyle (  Qt::RoundCap );
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	line=scene->addLine(QLineF(1,1,1,1),pen);
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    line->setZValue (Z_XLINK);
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	poly=scene->addPolygon(QPolygonF(),pen,color);
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    poly->setZValue (Z_XLINK);
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	setVisibility (false);
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}
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void XLinkObj::copy (XLinkObj* other)
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{
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	// TODO copy not used yet
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	MapObj::copy (other);
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	setVisibility (other->visible);
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	beginBranch=other->beginBranch;
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	endBranch=other->endBranch;
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	width=other->width;
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}
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void XLinkObj::setBegin (BranchObj *bo)
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{
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	if (bo) 
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	{
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		xLinkState=initXLink;
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		beginBranch=bo;
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		beginPos=beginBranch->getChildPos();
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	}	
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}
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BranchObj* XLinkObj::getBegin ()
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{
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	return beginBranch;
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}
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void XLinkObj::setEnd (BranchObj *bo)
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{
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	if (bo) 
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	{
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		xLinkState=initXLink;
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		endBranch=bo;
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		endPos=endBranch->getChildPos();
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	}		
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}
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BranchObj* XLinkObj::getEnd()
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{
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	return endBranch;
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}
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void XLinkObj::setWidth (int w)
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{
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	width=w;
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	pen.setWidth (w);
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	setColor (color);
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}
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int XLinkObj::getWidth()
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{
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	return pen.width();
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}
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void XLinkObj::setColor(QColor c)
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{
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	color=c;
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	pen.setColor (c);
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	line->setPen (pen);
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	poly->setBrush( color );
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}
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QColor XLinkObj::getColor()
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{
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	return pen.color();
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}
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void XLinkObj::setEnd (QPointF p)
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{
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	endPos=p;
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}
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bool XLinkObj::activate ()
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{
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	if (beginBranch && endBranch)
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	{
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		if (beginBranch==endBranch) return false;
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		xLinkState=activeXLink;
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		beginBranch->addXLink (this);
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		endBranch->addXLink (this);
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		setVisibility ();
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		return true;
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	} else
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		return false;
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}
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void XLinkObj::deactivate ()
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{
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	if (beginBranch)
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		beginBranch->removeXLinkRef (this);
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	beginBranch=NULL;	
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	if (endBranch)
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		endBranch->removeXLinkRef (this);
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	endBranch=NULL;	
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	visBranch=NULL;
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	xLinkState=undefinedXLink;
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	line->hide();
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}
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bool XLinkObj::isUsed()
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{
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	if (beginBranch || endBranch || xLinkState!=undefinedXLink)
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		return true;
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	else
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		return false;
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}
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void XLinkObj::updateXLink()
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{
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	QPointF a,b;
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	QPolygonF pa;
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	if (visBranch)
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	{
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		// Only one of the linked branches is visible
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		a=b=visBranch->getChildPos();
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		if (visBranch->getOrientation()==LinkableMapObj::RightOfCenter)
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		{
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			b.setX (b.x()+25);
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			pa.clear();
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			pa<< QPointF(b.x(),b.y())<<
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				QPointF(b.x()-arrowSize,b.y()-arrowSize)<<
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				QPointF(b.x()-arrowSize,b.y()+arrowSize);
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			poly->setPolygon(pa);
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		} else
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		{
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			b.setX (b.x()-25);
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			pa.clear();
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			pa<< QPointF(b.x(),b.y())<<
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				QPointF(b.x()+arrowSize,b.y()-arrowSize)<<
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				QPointF(b.x()+arrowSize,b.y()+arrowSize);
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			poly->setPolygon (pa);
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		}	
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	} else
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	{
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		// Both linked branches are visible
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		if (beginBranch)
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			// If a link is just drawn in the editor,
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			// we have already a beginBranch
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			a=beginBranch->getChildPos();
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		else
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			// This shouldn't be reached normally...
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			a=beginPos;
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		if (xLinkState==activeXLink && endBranch)
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			b=endBranch->getChildPos();
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		else
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			b=endPos;
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	}
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	if (line->line().p1()==a && line->line().p2()==b && !visBranch)
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	{
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		// update is called from both branches, so only
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		// update if something has changed
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		return;
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	}	
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	else
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	{
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		beginPos=a;
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		endPos=b;
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		line->setPen (pen);
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		line->setLine(a.x(), a.y(), b.x(), b.y());
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	}
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}
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BranchObj* XLinkObj::otherBranch(BranchObj* thisBranch)
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{
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	if (!beginBranch && !endBranch)
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		return NULL;
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	if (thisBranch==beginBranch)
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		return endBranch;
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	else	
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		return beginBranch;
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}
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void XLinkObj::positionBBox()
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{
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}
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void XLinkObj::calcBBoxSize()
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{
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}
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void XLinkObj::setVisibility (bool b)
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{
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	MapObj::setVisibility (b);
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	if (b)
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	{
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		line->show();
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		if (visBranch) 
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			poly->show();
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		else	
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			poly->hide();
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	}	
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	else
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	{
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		line->hide();
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		poly->hide();
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	}	
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}
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void XLinkObj::setVisibility ()
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{
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	if (beginBranch && endBranch)
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	{
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		if(beginBranch->isVisibleObj() && endBranch->isVisibleObj())
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		{	// Both ends are visible
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			visBranch=NULL;
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			setVisibility (true);
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		} else
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		{
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			if(!beginBranch->isVisibleObj() && !endBranch->isVisibleObj())
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			{	//None of the ends is visible
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				visBranch=NULL;
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				setVisibility (false);
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			} else
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			{	// Just one end is visible, draw a symbol that shows
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				// that there is a link to a scrolled branch
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				if (beginBranch->isVisibleObj())
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					visBranch=beginBranch;
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				else
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					visBranch=endBranch;
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				setVisibility (true);
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			}
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		}
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	}
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}
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QString XLinkObj::saveToDir ()
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{
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	QString s="";
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	if (beginBranch && endBranch &&xLinkState==activeXLink)
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	{
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		if (beginBranch==endBranch && xLinkState)
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			s="";
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		else
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		{
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			QString colAttr=attribut ("color",color.name());
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			QString widAttr=attribut ("width",QString().setNum(width,10));
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			QString begSelAttr=attribut ("beginID",beginBranch->getSelectString());
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			QString endSelAttr=attribut ("endID",  endBranch->getSelectString());
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			s=beginElement ("xlink", colAttr +widAttr +begSelAttr +endSelAttr);
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			s+=endElement ("xlink");
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		}
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	}
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	return s;
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}
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