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linkablemapobj.cpp
author insilmaril
Mon May 15 07:34:54 2006 +0000 (2006-05-15)
changeset 330 d39c67b49cbd
parent 260 69d648a0a15b
child 366 e95081c21da2
permissions -rw-r--r--
removed wiki style 
     1 #include <math.h>

     2 

     3 #include "linkablemapobj.h"

     4 #include "branchobj.h"

     5 #include "mapeditor.h"

     6 

     7 #include "version.h"

     8 

     9 

    10 /////////////////////////////////////////////////////////////////

    11 // LinkableMapObj

    12 /////////////////////////////////////////////////////////////////

    13 

    14 LinkableMapObj::LinkableMapObj():MapObj()

    15 {

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

    17     init ();

    18 }

    19 

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

    21 {

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

    23     init ();

    24 }

    25 

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

    27 {

    28     copy (lmo);

    29 }

    30 

    31 LinkableMapObj::~LinkableMapObj()

    32 {

    33     delete (bottomline);

    34     delete (selbox);

    35 	delete (frame);

    36 	delLink();

    37 }

    38 

    39 void LinkableMapObj::delLink()

    40 {

    41 	switch (style)

    42 	{

    43 		case StyleLine:

    44 			delete (l);

    45 			break;

    46 		case StyleParabel:

    47 			segment.clear();

    48 			break;

    49 		case StylePolyLine:

    50 			delete (p);

    51 			delete (l);

    52 			break;

    53 		case StylePolyParabel:

    54 			delete (p);

    55 			segment.clear();

    56 			break;

    57 		default:

    58 			break;

    59 	}		

    60 }

    61 

    62 void LinkableMapObj::init ()

    63 {

    64     depth=-1;	

    65 	mapEditor=NULL;

    66     childObj=NULL;

    67     parObj=NULL;

    68     parObjTmpBuf=NULL;

    69     parPos=QPoint(0,0);

    70     childPos=QPoint(0,0);

    71 	link2ParPos=false;

    72     l=NULL;

    73     orientation=OrientUndef;

    74     linkwidth=20;		

    75 	thickness_start=8;

    76     style=StyleUndef;

    77 	linkpos=LinkBottom;

    78     segment.setAutoDelete (TRUE);

    79     arcsegs=13;

    80 	QPointArray pa(arcsegs*2+2);

    81     

    82     bottomline=new QCanvasLine(canvas);

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

    84     bottomline->setZ(Z_LINK);

    85     bottomline->show();

    86 

    87     // Prepare showing the selection of a MapObj

    88     selbox = new QCanvasRectangle (canvas);

    89     selbox->setZ(Z_SELBOX);

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

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

    92     selbox->hide();

    93     selected=false;

    94 

    95 	hideLinkUnselected=false;

    96 

    97 	topPad=botPad=leftPad=rightPad=0;

    98 

    99 	// initialize frame

   100 	frame = new FrameObj (canvas);

   101 	

   102 	repositionRequest=false;

   103 

   104 	// Rel Positions

   105 	relPos=QPoint(0,0);

   106 	useRelPos=false;

   107 	useOrientation=true;

   108 }

   109 

   110 void LinkableMapObj::copy (LinkableMapObj* other)

   111 {

   112     MapObj::copy(other);

   113 	bboxTotal=other->bboxTotal;

   114     setLinkStyle(other->style);

   115     setLinkColor (other->linkcolor);

   116 	relPos=other->relPos;

   117 	useOrientation=other->useOrientation;

   118 

   119 }

   120 

   121 void LinkableMapObj::setChildObj(LinkableMapObj* o)

   122 {

   123     childObj=o;

   124 }

   125 

   126 void LinkableMapObj::setParObj(LinkableMapObj* o)

   127 {

   128     parObj=o;

   129 	mapEditor=parObj->getMapEditor();

   130 }

   131 

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

   133 {

   134 }

   135 

   136 void LinkableMapObj::unsetParObjTmp()

   137 {

   138 }

   139 

   140 bool LinkableMapObj::hasParObjTmp()

   141 {

   142 	if (parObjTmpBuf) return true;

   143 	return false;

   144 }

   145 

   146 void LinkableMapObj::setUseRelPos (const bool &b)

   147 {

   148 	useRelPos=b;

   149 }

   150 

   151 void LinkableMapObj::setRelPos()

   152 {

   153 	if (parObj)

   154 	{	

   155 		relPos.setX (absPos.x() - parObj->getChildPos().x() );

   156 		relPos.setY (absPos.y() - parObj->getChildPos().y() );

   157 

   158 		parObj->calcBBoxSize();

   159 		parObj->requestReposition();

   160 	}	

   161 }

   162 

   163 void LinkableMapObj::setRelPos(const QPoint &p)

   164 {

   165 	relPos=p;

   166 	if (parObj)

   167 	{	parObj->calcBBoxSize();

   168 		parObj->requestReposition();

   169 	}	

   170 }

   171 

   172 int LinkableMapObj::getTopPad()

   173 {

   174 	return topPad;

   175 }

   176 

   177 int LinkableMapObj::getLeftPad()

   178 {

   179 	return leftPad;

   180 }

   181 

   182 int LinkableMapObj::getRightPad()

   183 {

   184 	return rightPad;

   185 }

   186 

   187 LinkStyle LinkableMapObj::getDefLinkStyle ()

   188 {

   189 	if (!mapEditor) return StyleUndef;

   190 

   191 	LinkStyle ls=mapEditor->getLinkStyle();

   192 	switch (ls)

   193 	{

   194 		case StyleLine: 

   195 			return ls;

   196 			break;

   197 		case StyleParabel:

   198 			return ls;

   199 			break;

   200 		case StylePolyLine:	

   201 			if (depth>1)

   202 				return StyleLine;

   203 			else	

   204 				return ls;

   205 			break;

   206 		case StylePolyParabel:	

   207 			if (depth>1)

   208 				return StyleParabel;

   209 			else	

   210 				return ls;

   211 			break;

   212 		default: 

   213 			break;	

   214 	}	

   215 	return StyleUndef;

   216 }

   217 

   218 void LinkableMapObj::setLinkStyle(LinkStyle newstyle)

   219 {

   220 	//if (newstyle=style) return;

   221 	delLink();

   222 		

   223 	style=newstyle;

   224 

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

   226     {

   227 		int i;

   228 		QCanvasLine* cl;

   229 		switch (style)

   230 		{

   231 			case StyleUndef:

   232 				bottomline->hide();

   233 				break;

   234 			case StyleLine: 

   235 				l = new QCanvasLine(canvas);

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

   237 				l->setZ(Z_LINK);

   238 				if (visible)

   239 					l->show();

   240 				else

   241 					l->hide();

   242 				break;

   243 			case StyleParabel:

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

   245 				{

   246 					cl = new QCanvasLine(canvas);

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

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

   249 					cl->setZ(Z_LINK);

   250 					if (visible)

   251 						cl->show();

   252 					else

   253 						cl->hide();

   254 					segment.append(cl);

   255 				}

   256 				pa0.resize (arcsegs+1);

   257 				break;

   258 			case StylePolyLine:	

   259 				p = new QCanvasPolygon(canvas);

   260 				p->setBrush( linkcolor );

   261 				p->setZ(Z_LINK);

   262 				if (visible)

   263 					p->show();

   264 				else

   265 					p->hide();

   266 				pa0.resize (3);

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

   268 				// missing pixels, when polygon is extremly flat

   269 				l = new QCanvasLine(canvas);

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

   271 				l->setZ(Z_LINK);

   272 				if (visible)

   273 					l->show();

   274 				else

   275 					l->hide();

   276 				break;

   277 			case StylePolyParabel:	

   278 				p = new QCanvasPolygon(canvas);

   279 				p->setBrush( linkcolor );

   280 				p->setZ(Z_LINK);

   281 				if (visible)

   282 					p->show();

   283 				else

   284 					p->hide();

   285 				pa0.resize (arcsegs*2+2);

   286 				pa1.resize (arcsegs+1);

   287 				pa2.resize (arcsegs+1);

   288 

   289 				// TODO a bit awkward: draw the lines additionally 

   290 				// to polygon, to avoid missing pixels, 

   291 				// if polygon is extremly flat

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

   293 				{

   294 					cl = new QCanvasLine(canvas);

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

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

   297 					cl->setZ(Z_LINK);

   298 					if (visible)

   299 						cl->show();

   300 					else

   301 						cl->hide();

   302 					segment.append(cl);

   303 				}

   304 				break;

   305 			default: 

   306 				break;	

   307 		}	

   308 	} 

   309 }

   310 

   311 LinkStyle LinkableMapObj::getLinkStyle()

   312 {

   313 	return style;

   314 }

   315 

   316 void LinkableMapObj::setHideLinkUnselected(bool b)

   317 {

   318 	hideLinkUnselected=b;

   319 	setVisibility (visible);

   320 	updateLink();

   321 }

   322 

   323 bool LinkableMapObj::getHideLinkUnselected()

   324 {

   325 	return hideLinkUnselected;

   326 }

   327 

   328 void LinkableMapObj::setLinkPos(LinkPos lp)

   329 {

   330 	linkpos=lp;

   331 }

   332 

   333 LinkPos LinkableMapObj::getLinkPos()

   334 {

   335 	return linkpos;

   336 }

   337 

   338 

   339 void LinkableMapObj::setLinkColor()

   340 {

   341 	// Overloaded in BranchObj and childs

   342 	// here only set default color

   343 	if (mapEditor)

   344 		setLinkColor (mapEditor->getDefLinkColor());

   345 }

   346 

   347 void LinkableMapObj::setLinkColor(QColor col)

   348 {

   349 	linkcolor=col;

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

   351 	QCanvasLine *cl;

   352 	switch (style)

   353 	{

   354 		case StyleLine:

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

   356 			break;	

   357 		case StyleParabel:	

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

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

   360 			break;

   361 		case StylePolyLine:

   362 			p->setBrush( QBrush(col));

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

   364 			break;

   365 		case StylePolyParabel:	

   366 			p->setBrush( QBrush(col));

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

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

   369 			break;

   370 		default:

   371 			break;

   372 	} // switch (style)	

   373 }

   374 

   375 QColor LinkableMapObj::getLinkColor()

   376 {

   377 	return linkcolor;

   378 }

   379 

   380 FrameType LinkableMapObj::getFrameType()

   381 {

   382 	return frame->getFrameType();

   383 }

   384 

   385 void LinkableMapObj::setFrameType(const FrameType &t)

   386 {

   387 	frame->setFrameType(t);

   388 	calcBBoxSize();

   389 	positionBBox();

   390 	requestReposition();

   391 }

   392 

   393 void LinkableMapObj::setFrameType(const QString &t)

   394 {

   395 	frame->setFrameType(t);

   396 	calcBBoxSize();

   397 	positionBBox();

   398 	requestReposition();

   399 }

   400 

   401 void LinkableMapObj::setVisibility (bool v)

   402 {

   403 	QCanvasLine* cl;

   404 	MapObj::setVisibility (v);

   405 	bool visnow=visible;

   406 

   407 	// We can hide the link, while object is not selected

   408 	if (hideLinkUnselected && !selected)

   409 		visnow=false;

   410 

   411 	if (visnow) 

   412 	{

   413 		bottomline->show();

   414 		switch (style)

   415 		{

   416 			case StyleLine:

   417 				if (l) l->show();

   418 				break;

   419 			case StyleParabel:	

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

   421 					cl->show();

   422 				break;	

   423 			case StylePolyLine:

   424 				if (p) p->show();

   425 				if (l) l->show();

   426 				break;

   427 			case StylePolyParabel:	

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

   429 					cl->show();

   430 				if (p) p->show();

   431 				break;

   432 			default:

   433 				break;

   434 		}

   435 	} else 

   436 	{

   437 		bottomline->hide();

   438 		switch (style)

   439 		{

   440 			case StyleLine:

   441 				if (l) l->hide();

   442 				break;

   443 			case StyleParabel:	

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

   445 					cl->hide();

   446 				break;	

   447 			case StylePolyLine:

   448 				if (p) p->hide();

   449 				if (l) l->hide();

   450 				break;

   451 			case StylePolyParabel:	

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

   453 					cl->hide();

   454 				if (p) p->hide();

   455 				break;

   456 			default:

   457 				break;

   458 		}

   459 	}	

   460 }

   461 

   462 void LinkableMapObj::updateLink()

   463 {

   464     // needs:

   465     //	childPos of parent

   466     //	orient   of parent

   467     //	style

   468     // 

   469     // sets:

   470     //	orientation

   471     //	childPos	(by calling setDockPos())

   472     //	parPos		(by calling setDockPos())

   473 	//  bottomlineY

   474     //	drawing of the link itself

   475 

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

   477 	// have parents yet...

   478 	if (style==StyleUndef) return;	

   479 

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

   481 		linkpos=LinkBottom;

   482 	else	

   483 		linkpos=LinkMiddle;

   484 	switch (linkpos)

   485 	{

   486 		case LinkMiddle:

   487 			bottomlineY=bbox.top()+bbox.height() /2;	// draw link to middle (of frame)

   488 			break;

   489 		default :

   490 			bottomlineY=bbox.bottom()-1;	// draw link to bottom of box

   491 			break;

   492 	}

   493 	

   494     double p2x,p2y;								// Set P2 Before setting

   495 	if (!link2ParPos)

   496 	{

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

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

   499 	} else	

   500 	{

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

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

   503 	} 

   504 

   505 	LinkOrient orientOld=orientation;

   506 

   507     // Set orientation, first look for orientation of parent

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

   509 		// use the orientation of the parent:

   510 		orientation=parObj->getOrientation();

   511     else

   512     {

   513 		// calc orientation depending on position rel to mapCenter

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

   515 			orientation=OrientLeftOfCenter; 

   516 		else

   517 			orientation=OrientRightOfCenter;

   518     }

   519 

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

   521 	{

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

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

   524 		// linking of subranch to itself => segfault

   525 		//

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

   527 		// no need to reposition now

   528 		reposition();

   529 	}

   530 	

   531 	setDockPos();

   532 

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

   534 	double p1y=parPos.y();

   535 

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

   537 	double vy=p2y - p1y;

   538 

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

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

   541 		qRound(childPos.y()),

   542 		qRound(p1x),

   543 		qRound(p1y) );

   544 

   545 	double a;	// angle

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

   547 		a=M_PI_2;

   548 	else

   549 		a=atan( vy / vx );

   550 	// "turning point" for drawing polygonal links

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

   552 	

   553 	QCanvasLine *cl;

   554 

   555 	int i;

   556 

   557     // Draw the link

   558 	switch (style)

   559 	{

   560 		case StyleLine:

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

   562 				qRound(parPos.y()),

   563 				qRound(p2x),

   564 				qRound(p2y) );

   565 			break;	

   566 		case StyleParabel:	

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

   568 			i=0;

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

   570 			{	

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

   572 				i++;

   573 			}

   574 			break;

   575 		case StylePolyLine:

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

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

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

   579 			p->setPoints (pa0);

   580 			// here too, draw line to avoid missing pixels

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

   582 				qRound(parPos.y()),

   583 				qRound(p2x),

   584 				qRound(p2y) );

   585 			break;

   586 		case StylePolyParabel:	

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

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

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

   590 			{

   591 				// Combine the arrays to a single one

   592 				pa0[i]=pa1[i];

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

   594 			}	

   595 			p->setPoints (pa0);

   596 			i=0;

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

   598 			{	

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

   600 				i++;

   601 			}

   602 			break;

   603 		default:

   604 			break;

   605 	} // switch (style)	

   606 }

   607 	

   608 LinkableMapObj* LinkableMapObj::getChildObj()

   609 {

   610     return childObj;

   611 }

   612 

   613 LinkableMapObj* LinkableMapObj::getParObj()

   614 {

   615     return parObj;

   616 }

   617 

   618 LinkableMapObj* LinkableMapObj::findObjBySelect (QString s)

   619 {

   620 	LinkableMapObj *lmo=this;

   621 	QString part;

   622 	QString typ;

   623 	QString num;

   624 	while (!s.isEmpty() )

   625 	{

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

   627 		typ=part.left (3);

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

   629 		if (typ=="mc:")

   630 		{

   631 			if (depth>0)

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

   633 			else

   634 				break;

   635 		} else

   636 			if (typ=="bo:")

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

   638 			else

   639 				if (typ=="fi:")

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

   641 		if (!lmo) break;

   642 		

   643 		if (s.contains(","))

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

   645 		else	

   646 			break;

   647 	}

   648 	return lmo;

   649 }

   650 

   651 void LinkableMapObj::setDockPos()

   652 {

   653 	cout <<"LMO::setDockPos()\n";

   654 }

   655 

   656 QPoint LinkableMapObj::getChildPos()

   657 {

   658     return childPos;

   659 }

   660 

   661 QPoint LinkableMapObj::getParPos()

   662 {

   663     return parPos;

   664 }

   665 

   666 QPoint LinkableMapObj::getRelPos()

   667 {

   668 	return relPos;

   669 /* FIXME not needed? relPos was moved in 1.7.10 from

   670    floatobj to linkablemapobj. Before we had:

   671 	

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

   673     return QPoint(

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

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

   676 	);

   677 */	

   678 }

   679 

   680 

   681 void LinkableMapObj::setUseOrientation (const bool &b)

   682 {	

   683 	if (useOrientation!=b)

   684 	{

   685 		useOrientation=b;

   686 		requestReposition();

   687 	}	

   688 }

   689 

   690 LinkOrient LinkableMapObj::getOrientation()

   691 {

   692     return orientation;

   693 }

   694 

   695 int LinkableMapObj::getDepth()

   696 {

   697     return depth;

   698 }

   699 

   700 void LinkableMapObj::setMapEditor (MapEditor *me)

   701 {

   702 	mapEditor=me;

   703 }

   704 

   705 MapEditor* LinkableMapObj::getMapEditor ()

   706 {

   707 	return mapEditor;

   708 }

   709 

   710 QPoint LinkableMapObj::getRandPos()

   711 {

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

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

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

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

   716 }

   717 

   718 void LinkableMapObj::alignRelativeTo (QPoint ref)

   719 {

   720 	// FIXME testing, seems not to be used right now...

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

   722 }

   723 

   724 void LinkableMapObj::reposition()

   725 {

   726 	if (depth==0)

   727 	{

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

   729 		// all upper LMOs have to change, too.

   730 		calcBBoxSizeWithChilds();

   731 

   732 	    alignRelativeTo ( QPoint (absPos.x(),

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

   734 	} else

   735 	{

   736 		// This is only important for moving branches:

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

   738 	    alignRelativeTo ( QPoint (absPos.x(),

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

   740 	}

   741 }

   742 

   743 void LinkableMapObj::requestReposition()

   744 {

   745 	if (!repositionRequest)

   746 	{

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

   748 		// been done yet

   749 		repositionRequest=true;

   750 		if (parObj) parObj->requestReposition();

   751 	}

   752 }

   753 

   754 void LinkableMapObj::forceReposition()

   755 {

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

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

   758 	// which could collect requests for a reposition.

   759 	// Then we have to call forceReposition()

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

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

   762 	// the end, thus check first:

   763 

   764 	if (mapEditor->isRepositionBlocked()) return;

   765 	

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

   767 	

   768 	if (parObj) 

   769 		parObj->forceReposition(); 

   770 	else 

   771 		reposition(); 

   772 }

   773 

   774 bool LinkableMapObj::repositionRequested()

   775 {

   776 	return repositionRequest;

   777 }

   778 

   779 

   780 void LinkableMapObj::setSelBox()

   781 {

   782     selbox->setX (clickBox.x() );

   783     selbox->setY (clickBox.y() );

   784     selbox->setSize (clickBox.width(), clickBox.height() );

   785 }

   786 

   787 void LinkableMapObj::select()

   788 {

   789 	setSelBox();

   790     selected=true;

   791     selbox->show();

   792 // FIXME not needed?	

   793 	setVisibility (visible);

   794 }

   795 

   796 

   797 void LinkableMapObj::unselect()

   798 {

   799     selected=false;

   800     selbox->hide();

   801 	// Maybe we have to hide the link:

   802 	setVisibility (visible);

   803 }

   804 

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

   806 

   807 {

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

   809 	double vy=p2y - p1y;

   810 

   811 	double dx;				// delta x during calculation of parabel

   812 	

   813 	double pnx;				// next point

   814 	double pny;

   815 	double m;

   816 

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

   818 		m=0;

   819 	else	

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

   821 	dx=vx/(arcsegs);

   822 	int i;

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

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

   825 	{	

   826 		pnx=p1x+dx;

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

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

   829 		p1x=pnx;

   830 		p1y=pny;

   831 	}	

   832 }

   833 

   834 QString LinkableMapObj::getLinkAttr ()

   835 {

   836 	if (hideLinkUnselected)

   837 		return attribut ("hideLink","true");

   838 	else

   839 		return attribut ("hideLink","false");

   840 	

   841 }
vym