diff -r 9eb7767c2dfa -r 608f976aa7bb xlinkobj.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xlinkobj.cpp	Tue Jun 06 14:58:11 2006 +0000
@@ -0,0 +1,302 @@
+#include "xlinkobj.h"
+#include "branchobj.h"
+#include "mapeditor.h"
+//Added by qt3to4:
+#include <Q3PointArray>
+
+
+/////////////////////////////////////////////////////////////////
+// XLinkObj
+/////////////////////////////////////////////////////////////////
+
+int XLinkObj::arrowSize=10;						// make instances 
+
+XLinkObj::XLinkObj ():MapObj() 
+{
+	//	cout << "Const XLinkObj ()\n";
+	init();
+}
+
+XLinkObj::XLinkObj (Q3Canvas* c):MapObj(c)
+{
+	//	cout << "Const XLinkObj (c)  called from MapCenterObj (c)\n";
+	init();
+}
+
+
+XLinkObj::~XLinkObj ()
+{
+	//	cout << "Destr XLinkObj\n";
+	if (xLinkState!=undefinedXLink)
+		deactivate();
+	delete (line);
+	delete (poly);
+}
+
+
+void XLinkObj::init () 
+{
+	beginBranch=NULL;
+	endBranch=NULL;
+	visBranch=NULL;
+	xLinkState=undefinedXLink;
+
+	color=QColor (180,180,180);
+	line=new Q3CanvasLine (canvas);
+	width=1;
+	line->setPen (QPen(color, width));
+	line->setZ (Z_XLINK);
+
+	poly=new Q3CanvasPolygon (canvas);
+	poly->setBrush( color );
+	poly->setZ (Z_XLINK);
+
+	setVisibility (false);
+}
+
+void XLinkObj::copy (XLinkObj* other)
+{
+	// TODO copy not used yet
+	MapObj::copy (other);
+	setVisibility (other->visible);
+	beginBranch=other->beginBranch;
+	endBranch=other->endBranch;
+	width=other->width;
+}
+
+void XLinkObj::setBegin (BranchObj *bo)
+{
+	if (bo) 
+	{
+		xLinkState=initXLink;
+		beginBranch=bo;
+		beginPos=beginBranch->getChildPos();
+	}	
+}
+
+BranchObj* XLinkObj::getBegin ()
+{
+	return beginBranch;
+}
+
+void XLinkObj::setEnd (BranchObj *bo)
+{
+	if (bo) 
+	{
+		xLinkState=initXLink;
+		endBranch=bo;
+		endPos=endBranch->getChildPos();
+	}		
+}
+
+BranchObj* XLinkObj::getEnd()
+{
+	return endBranch;
+}
+
+void XLinkObj::setWidth (int w)
+{
+	width=w;
+	setColor (color);
+}
+
+int XLinkObj::getWidth()
+{
+	return width;
+}
+
+void XLinkObj::setColor(QColor c)
+{
+	color=c;
+	line->setPen (QPen(color, width));
+	poly->setBrush( color );
+}
+
+QColor XLinkObj::getColor()
+{
+	return color;
+}
+
+void XLinkObj::setEnd (QPoint p)
+{
+	endPos=p;
+}
+
+bool XLinkObj::activate ()
+{
+	if (beginBranch && endBranch)
+	{
+		if (beginBranch==endBranch) return false;
+		xLinkState=activeXLink;
+		beginBranch->addXLink (this);
+		endBranch->addXLink (this);
+		setVisibility ();
+		return true;
+	} else
+		return false;
+}
+
+void XLinkObj::deactivate ()
+{
+	if (beginBranch)
+		beginBranch->removeXLinkRef (this);
+	beginBranch=NULL;	
+	if (endBranch)
+		endBranch->removeXLinkRef (this);
+	endBranch=NULL;	
+	visBranch=NULL;
+	xLinkState=undefinedXLink;
+
+	line->hide();
+}
+
+bool XLinkObj::isUsed()
+{
+	if (beginBranch || endBranch || xLinkState!=undefinedXLink)
+		return true;
+	else
+		return false;
+}
+
+void XLinkObj::updateXLink()
+{
+	QPoint a,b;
+	Q3PointArray pa (3);
+	if (visBranch)
+	{
+		// Only one of the linked branches is visible
+		a=b=visBranch->getChildPos();
+		if (visBranch->getOrientation()==OrientRightOfCenter)
+		{
+			b.setX (b.x()+25);
+			pa.putPoints (0,3,
+				b.x(),b.y(),
+				b.x()-arrowSize,b.y()-arrowSize,
+				b.x()-arrowSize,b.y()+arrowSize
+			);
+			poly->setPoints (pa);
+		} else
+		{
+			b.setX (b.x()-25);
+			pa.putPoints (0,3,
+				b.x(),b.y(),
+				b.x()+arrowSize,b.y()-arrowSize,
+				b.x()+arrowSize,b.y()+arrowSize);
+			poly->setPoints (pa);
+		}	
+	} else
+	{
+		// Both linked branches are visible
+		if (beginBranch)
+			// If a link is just drawn in the editor,
+			// we have already a beginBranch
+			a=beginBranch->getChildPos();
+		else
+			// This shouldn't be reached normally...
+			a=beginPos;
+		if (xLinkState==activeXLink && endBranch)
+			b=endBranch->getChildPos();
+		else
+			b=endPos;
+	}
+
+
+	if (line->startPoint()==a && line->endPoint()==b && !visBranch)
+	{
+		// update is called from both branches, so only
+		// update if something has changed
+		return;
+	}	
+	else
+	{
+		beginPos=a;
+		endPos=b;
+		line->setPen (QPen(color, width));
+		line->setPoints (a.x(), a.y(), b.x(), b.y());
+	}
+}
+
+BranchObj* XLinkObj::otherBranch(BranchObj* thisBranch)
+{
+	if (!beginBranch && !endBranch)
+		return NULL;
+	if (thisBranch==beginBranch)
+		return endBranch;
+	else	
+		return beginBranch;
+}
+
+void XLinkObj::positionBBox()
+{
+}
+
+void XLinkObj::calcBBoxSize()
+{
+}
+
+void XLinkObj::setVisibility (bool b)
+{
+	MapObj::setVisibility (b);
+	if (b)
+	{
+		line->show();
+		if (visBranch) 
+			poly->show();
+		else	
+			poly->hide();
+	}	
+	else
+	{
+		line->hide();
+		poly->hide();
+	}	
+}
+
+void XLinkObj::setVisibility ()
+{
+	if (beginBranch && endBranch)
+	{
+		if(beginBranch->isVisibleObj() && endBranch->isVisibleObj())
+		{	// Both ends are visible
+			visBranch=NULL;
+			setVisibility (true);
+		} else
+		{
+			if(!beginBranch->isVisibleObj() && !endBranch->isVisibleObj())
+			{	//None of the ends is visible
+				visBranch=NULL;
+				setVisibility (false);
+			} else
+			{	// Just one end is visible, draw a symbol that shows
+				// that there is a link to a scrolled branch
+				if (beginBranch->isVisibleObj())
+					visBranch=beginBranch;
+				else
+					visBranch=endBranch;
+				setVisibility (true);
+			}
+		}
+	}
+}
+
+QString XLinkObj::saveToDir ()
+{
+	QString s="";
+	if (beginBranch && endBranch &&xLinkState==activeXLink)
+	{
+		if (beginBranch==endBranch && xLinkState)
+			s="";
+		else
+		{
+			QString colAttr=attribut ("color",color.name());
+			QString widAttr=attribut ("width",QString().setNum(width,10));
+			QString begSelAttr=attribut ("beginBranch",beginBranch->getSelectString());
+			QString endSelAttr=attribut ("endBranch",  endBranch->getSelectString());
+			s=beginElement ("xlink", colAttr +widAttr +begSelAttr +endSelAttr);
+
+			s+=endElement ("xlink");
+		}
+	}
+	return s;
+}
+