xlinkobj.cpp
author insilmaril
Thu, 03 Sep 2009 08:52:00 +0000
changeset 790 133e2ed6b9c5
parent 685 d788ebd97c45
child 847 43268373032d
permissions -rw-r--r--
More work on xLinks
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#include "xlinkobj.h"
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#include "branchobj.h"
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#include "branchitem.h"
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#include "xlinkitem.h"
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#include <iostream>
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using namespace std;
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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 (QGraphicsScene* scene, TreeItem* ti):MapObj(scene,ti)
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{
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	//cout << "Const XLinkObj (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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	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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	XLinkItem *xli=(XLinkItem*)treeItem;
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	visBranch=NULL;
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	pen.setColor ( xli->getColor() );
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	pen.setWidth ( xli->getWidth() );
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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, xli->getColor());
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    poly->setZValue (Z_XLINK);
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	setVisibility (true);
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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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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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		BranchObj *bo=(BranchObj*)(visBranch->getLMO());
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		if (!bo) return;
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		a=b=bo->getChildPos();
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		if (bo->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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		BranchItem *bi=((XLinkItem*)treeItem)->getBegin();
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		if ( bi)
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		{
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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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			BranchObj *bo=(BranchObj*)(bi->getLMO());
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			if (bo)	
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				a=bo->getChildPos();
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			else 
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				return;	
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		}	
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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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		// FIXME-3 try to get rid of xLinkstate if (xLinkState==activeXLink && endBranch)
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		bi=((XLinkItem*)treeItem)->getEnd();
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		if (bi)
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		{
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			BranchObj *bo=(BranchObj*)(bi->getLMO());
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			if (bo)	
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				b=bo->getChildPos();
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			else 
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				return;	
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		}
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		else
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			b=endPos;
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	}
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	beginPos=a;
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	endPos=b;
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	XLinkItem *xli=(XLinkItem*)treeItem;
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	pen.setColor ( xli->getColor() );
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	pen.setWidth ( xli->getWidth() );
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	poly->setBrush (xli->getColor() );
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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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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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	BranchItem* beginBI=((XLinkItem*)treeItem)->getBegin();
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	BranchObj* beginBO=NULL;
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	if (beginBI) beginBO=(BranchObj*)(beginBI->getLMO());
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	BranchObj* endBO=NULL;
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	BranchItem* endBI=((XLinkItem*)treeItem)->getEnd();
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	if (endBI) endBO=(BranchObj*)(endBI->getLMO());
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	if (beginBO && endBO)
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	{
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		if(beginBO->isVisibleObj() && endBO->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(!beginBO->isVisibleObj() && !endBO->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 (beginBO->isVisibleObj())
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					visBranch=beginBI;
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				else
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					visBranch=endBI;
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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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