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linkablemapobj.cpp
author insilmaril
Tue, 24 Oct 2006 15:36:38 +0000
changeset 394 67cfa6e6b863
parent 393 053b8645e3e9
child 395 7ced3733ba60
permissions -rw-r--r--
1.8.58 - More undoCommands, spanish translation of doc 
     1 #include <math.h>

     2 

     3 #include "linkablemapobj.h"

     4 #include "branchobj.h"

     5 #include "mapeditor.h"

     6 

     7 #include "version.h"

     8 //Added by qt3to4:

     9 #include <Q3PointArray>

    10 

    11 

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

    13 // LinkableMapObj

    14 /////////////////////////////////////////////////////////////////

    15 

    16 LinkableMapObj::LinkableMapObj():MapObj()

    17 {

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

    19     init ();

    20 }

    21 

    22 LinkableMapObj::LinkableMapObj(Q3Canvas* c) :MapObj(c)

    23 {

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

    25     init ();

    26 }

    27 

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

    29 {

    30     copy (lmo);

    31 }

    32 

    33 LinkableMapObj::~LinkableMapObj()

    34 {

    35     delete (bottomline);

    36     delete (selbox);

    37 	delete (frame);

    38 	delLink();

    39 }

    40 

    41 void LinkableMapObj::delLink()

    42 {

    43 	switch (style)

    44 	{

    45 		case StyleLine:

    46 			delete (l);

    47 			break;

    48 		case StyleParabel:

    49 			segment.clear();

    50 			break;

    51 		case StylePolyLine:

    52 			delete (p);

    53 			delete (l);

    54 			break;

    55 		case StylePolyParabel:

    56 			delete (p);

    57 			segment.clear();

    58 			break;

    59 		default:

    60 			break;

    61 	}		

    62 }

    63 

    64 void LinkableMapObj::init ()

    65 {

    66     depth=-1;	

    67 	mapEditor=NULL;

    68     childObj=NULL;

    69     parObj=NULL;

    70     parObjTmpBuf=NULL;

    71     parPos=QPoint(0,0);

    72     childPos=QPoint(0,0);

    73 	link2ParPos=false;

    74     l=NULL;

    75     orientation=OrientUndef;

    76     linkwidth=20;		

    77 	thickness_start=8;

    78     style=StyleUndef;

    79 	linkpos=LinkBottom;

    80     segment.setAutoDelete (TRUE);

    81     arcsegs=13;

    82 	Q3PointArray pa(arcsegs*2+2);

    83     

    84     bottomline=new Q3CanvasLine(canvas);

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

    86     bottomline->setZ(Z_LINK);

    87     bottomline->show();

    88 

    89     // Prepare showing the selection of a MapObj

    90     selbox = new Q3CanvasRectangle (canvas);

    91     selbox->setZ(Z_SELBOX);

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

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

    94     selbox->hide();

    95     selected=false;

    96 

    97 	hideLinkUnselected=false;

    98 

    99 	topPad=botPad=leftPad=rightPad=0;

   100 

   101 	// initialize frame

   102 	frame = new FrameObj (canvas);

   103 	

   104 	repositionRequest=false;

   105 

   106 	// Rel Positions

   107 	relPos=QPoint(0,0);

   108 	useRelPos=false;

   109 	useOrientation=true;

   110 }

   111 

   112 void LinkableMapObj::copy (LinkableMapObj* other)

   113 {

   114     MapObj::copy(other);

   115 	bboxTotal=other->bboxTotal;

   116     setLinkStyle(other->style);

   117     setLinkColor (other->linkcolor);

   118 	relPos=other->relPos;

   119 	useOrientation=other->useOrientation;

   120 

   121 }

   122 

   123 void LinkableMapObj::setChildObj(LinkableMapObj* o)

   124 {

   125     childObj=o;

   126 }

   127 

   128 void LinkableMapObj::setParObj(LinkableMapObj* o)

   129 {

   130     parObj=o;

   131 	mapEditor=parObj->getMapEditor();

   132 }

   133 

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

   135 {

   136 }

   137 

   138 void LinkableMapObj::unsetParObjTmp()

   139 {

   140 }

   141 

   142 bool LinkableMapObj::hasParObjTmp()

   143 {

   144 	if (parObjTmpBuf) return true;

   145 	return false;

   146 }

   147 

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

   149 {

   150 	useRelPos=b;

   151 }

   152 

   153 void LinkableMapObj::setRelPos()

   154 {

   155 	if (parObj)

   156 	{	

   157 		getRelPos();

   158 		parObj->calcBBoxSize();

   159 	}	

   160 }

   161 

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

   163 {

   164 	relPos=p;

   165 	if (parObj)

   166 	{		

   167 		parObj->calcBBoxSize();

   168 		requestReposition();

   169 	}	

   170 }

   171 

   172 QPoint LinkableMapObj::getRelPos()

   173 {

   174 	if (!parObj) return QPoint();

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

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

   177 	return relPos;

   178 }

   179 

   180 int LinkableMapObj::getTopPad()

   181 {

   182 	return topPad;

   183 }

   184 

   185 int LinkableMapObj::getLeftPad()

   186 {

   187 	return leftPad;

   188 }

   189 

   190 int LinkableMapObj::getRightPad()

   191 {

   192 	return rightPad;

   193 }

   194 

   195 LinkStyle LinkableMapObj::getDefLinkStyle ()

   196 {

   197 	if (!mapEditor) return StyleUndef;

   198 

   199 	LinkStyle ls=mapEditor->getLinkStyle();

   200 	switch (ls)

   201 	{

   202 		case StyleLine: 

   203 			return ls;

   204 			break;

   205 		case StyleParabel:

   206 			return ls;

   207 			break;

   208 		case StylePolyLine:	

   209 			if (depth>1)

   210 				return StyleLine;

   211 			else	

   212 				return ls;

   213 			break;

   214 		case StylePolyParabel:	

   215 			if (depth>1)

   216 				return StyleParabel;

   217 			else	

   218 				return ls;

   219 			break;

   220 		default: 

   221 			break;	

   222 	}	

   223 	return StyleUndef;

   224 }

   225 

   226 void LinkableMapObj::setLinkStyle(LinkStyle newstyle)

   227 {

   228 	//if (newstyle=style) return;

   229 	delLink();

   230 		

   231 	style=newstyle;

   232 

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

   234     {

   235 		int i;

   236 		Q3CanvasLine* cl;

   237 		switch (style)

   238 		{

   239 			case StyleUndef:

   240 				bottomline->hide();

   241 				break;

   242 			case StyleLine: 

   243 				l = new Q3CanvasLine(canvas);

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

   245 				l->setZ(Z_LINK);

   246 				if (visible)

   247 					l->show();

   248 				else

   249 					l->hide();

   250 				break;

   251 			case StyleParabel:

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

   253 				{

   254 					cl = new Q3CanvasLine(canvas);

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

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

   257 					cl->setZ(Z_LINK);

   258 					if (visible)

   259 						cl->show();

   260 					else

   261 						cl->hide();

   262 					segment.append(cl);

   263 				}

   264 				pa0.resize (arcsegs+1);

   265 				break;

   266 			case StylePolyLine:	

   267 				p = new Q3CanvasPolygon(canvas);

   268 				p->setBrush( linkcolor );

   269 				p->setZ(Z_LINK);

   270 				if (visible)

   271 					p->show();

   272 				else

   273 					p->hide();

   274 				pa0.resize (3);

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

   276 				// missing pixels, when polygon is extremly flat

   277 				l = new Q3CanvasLine(canvas);

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

   279 				l->setZ(Z_LINK);

   280 				if (visible)

   281 					l->show();

   282 				else

   283 					l->hide();

   284 				break;

   285 			case StylePolyParabel:	

   286 				p = new Q3CanvasPolygon(canvas);

   287 				p->setBrush( linkcolor );

   288 				p->setZ(Z_LINK);

   289 				if (visible)

   290 					p->show();

   291 				else

   292 					p->hide();

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

   294 				pa1.resize (arcsegs+1);

   295 				pa2.resize (arcsegs+1);

   296 

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

   298 				// to polygon, to avoid missing pixels, 

   299 				// if polygon is extremly flat

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

   301 				{

   302 					cl = new Q3CanvasLine(canvas);

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

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

   305 					cl->setZ(Z_LINK);

   306 					if (visible)

   307 						cl->show();

   308 					else

   309 						cl->hide();

   310 					segment.append(cl);

   311 				}

   312 				break;

   313 			default: 

   314 				break;	

   315 		}	

   316 	} 

   317 }

   318 

   319 LinkStyle LinkableMapObj::getLinkStyle()

   320 {

   321 	return style;

   322 }

   323 

   324 void LinkableMapObj::setHideLinkUnselected(bool b)

   325 {

   326 	hideLinkUnselected=b;

   327 	setVisibility (visible);

   328 	updateLink();

   329 }

   330 

   331 bool LinkableMapObj::getHideLinkUnselected()

   332 {

   333 	return hideLinkUnselected;

   334 }

   335 

   336 void LinkableMapObj::setLinkPos(LinkPos lp)

   337 {

   338 	linkpos=lp;

   339 }

   340 

   341 LinkPos LinkableMapObj::getLinkPos()

   342 {

   343 	return linkpos;

   344 }

   345 

   346 

   347 void LinkableMapObj::setLinkColor()

   348 {

   349 	// Overloaded in BranchObj and childs

   350 	// here only set default color

   351 	if (mapEditor)

   352 		setLinkColor (mapEditor->getDefLinkColor());

   353 }

   354 

   355 void LinkableMapObj::setLinkColor(QColor col)

   356 {

   357 	linkcolor=col;

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

   359 	Q3CanvasLine *cl;

   360 	switch (style)

   361 	{

   362 		case StyleLine:

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

   364 			break;	

   365 		case StyleParabel:	

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

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

   368 			break;

   369 		case StylePolyLine:

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

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

   372 			break;

   373 		case StylePolyParabel:	

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

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

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

   377 			break;

   378 		default:

   379 			break;

   380 	} // switch (style)	

   381 }

   382 

   383 QColor LinkableMapObj::getLinkColor()

   384 {

   385 	return linkcolor;

   386 }

   387 

   388 FrameType LinkableMapObj::getFrameType()

   389 {

   390 	return frame->getFrameType();

   391 }

   392 

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

   394 {

   395 	frame->setFrameType(t);

   396 	calcBBoxSize();

   397 	positionBBox();

   398 	requestReposition();

   399 }

   400 

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

   402 {

   403 	frame->setFrameType(t);

   404 	calcBBoxSize();

   405 	positionBBox();

   406 	requestReposition();

   407 }

   408 

   409 void LinkableMapObj::setVisibility (bool v)

   410 {

   411 	Q3CanvasLine* cl;

   412 	MapObj::setVisibility (v);

   413 	bool visnow=visible;

   414 

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

   416 	if (hideLinkUnselected && !selected)

   417 		visnow=false;

   418 

   419 	if (visnow) 

   420 	{

   421 		bottomline->show();

   422 		switch (style)

   423 		{

   424 			case StyleLine:

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

   426 				break;

   427 			case StyleParabel:	

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

   429 					cl->show();

   430 				break;	

   431 			case StylePolyLine:

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

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

   434 				break;

   435 			case StylePolyParabel:	

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

   437 					cl->show();

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

   439 				break;

   440 			default:

   441 				break;

   442 		}

   443 	} else 

   444 	{

   445 		bottomline->hide();

   446 		switch (style)

   447 		{

   448 			case StyleLine:

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

   450 				break;

   451 			case StyleParabel:	

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

   453 					cl->hide();

   454 				break;	

   455 			case StylePolyLine:

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

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

   458 				break;

   459 			case StylePolyParabel:	

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

   461 					cl->hide();

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

   463 				break;

   464 			default:

   465 				break;

   466 		}

   467 	}	

   468 }

   469 

   470 void LinkableMapObj::setOrientation()

   471 {

   472 	LinkOrient orientOld=orientation;

   473 

   474 	if (!parObj) 

   475 	{

   476 		orientation=OrientUndef;

   477 		return;

   478 	}

   479 		

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

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

   482 		// use the orientation of the parent:

   483 		orientation=parObj->getOrientation();

   484     else

   485     {

   486 		// calc orientation depending on position rel to parent

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

   488 			orientation=OrientLeftOfCenter; 

   489 		else

   490 			orientation=OrientRightOfCenter;

   491     }

   492 	if (orientOld!=orientation) requestReposition();

   493 }

   494 

   495 void LinkableMapObj::updateLink()

   496 {

   497     // needs:

   498     //	childPos of parent

   499     //	orient   of parent

   500     //	style

   501     // 

   502     // sets:

   503     //	orientation

   504     //	childPos	(by calling setDockPos())

   505     //	parPos		(by calling setDockPos())

   506 	//  bottomlineY

   507     //	drawing of the link itself

   508 

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

   510 	// have parents yet...

   511 	if (style==StyleUndef) return;	

   512 

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

   514 		linkpos=LinkBottom;

   515 	else	

   516 		linkpos=LinkMiddle;

   517 	switch (linkpos)

   518 	{

   519 		case LinkMiddle:

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

   521 			break;

   522 		default :

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

   524 			break;

   525 	}

   526 	

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

   528 	if (!link2ParPos)

   529 	{

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

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

   532 	} else	

   533 	{

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

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

   536 	} 

   537 

   538 	setDockPos(); // Call overloaded method

   539 	setOrientation();

   540 

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

   542 	double p1y=parPos.y();

   543 

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

   545 	double vy=p2y - p1y;

   546 

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

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

   549 		qRound(childPos.y()),

   550 		qRound(p1x),

   551 		qRound(p1y) );

   552 

   553 	double a;	// angle

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

   555 		a=M_PI_2;

   556 	else

   557 		a=atan( vy / vx );

   558 	// "turning point" for drawing polygonal links

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

   560 	

   561 	Q3CanvasLine *cl;

   562 

   563 	int i;

   564 

   565     // Draw the link

   566 	switch (style)

   567 	{

   568 		case StyleLine:

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

   570 				qRound(parPos.y()),

   571 				qRound(p2x),

   572 				qRound(p2y) );

   573 			break;	

   574 		case StyleParabel:	

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

   576 			i=0;

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

   578 			{	

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

   580 				i++;

   581 			}

   582 			break;

   583 		case StylePolyLine:

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

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

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

   587 			p->setPoints (pa0);

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

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

   590 				qRound(parPos.y()),

   591 				qRound(p2x),

   592 				qRound(p2y) );

   593 			break;

   594 		case StylePolyParabel:	

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

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

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

   598 			{

   599 				// Combine the arrays to a single one

   600 				pa0[i]=pa1[i];

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

   602 			}	

   603 			p->setPoints (pa0);

   604 			i=0;

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

   606 			{	

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

   608 				i++;

   609 			}

   610 			break;

   611 		default:

   612 			break;

   613 	} // switch (style)	

   614 }

   615 	

   616 LinkableMapObj* LinkableMapObj::getChildObj()

   617 {

   618     return childObj;

   619 }

   620 

   621 LinkableMapObj* LinkableMapObj::getParObj()

   622 {

   623     return parObj;

   624 }

   625 

   626 LinkableMapObj* LinkableMapObj::findObjBySelect (QString s)

   627 {

   628 	LinkableMapObj *lmo=this;

   629 	QString part;

   630 	QString typ;

   631 	QString num;

   632 	while (!s.isEmpty() )

   633 	{

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

   635 		typ=part.left (3);

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

   637 		if (typ=="mc:")

   638 		{

   639 			if (depth>0)

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

   641 			else

   642 				break;

   643 		} else

   644 			if (typ=="bo:")

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

   646 			else

   647 				if (typ=="fi:")

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

   649 		if (!lmo) break;

   650 		

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

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

   653 		else	

   654 			break;

   655 	}

   656 	return lmo;

   657 }

   658 

   659 QPoint LinkableMapObj::getChildPos()

   660 {

   661     return childPos;

   662 }

   663 

   664 QPoint LinkableMapObj::getParPos()

   665 {

   666     return parPos;

   667 }

   668 

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

   670 {	

   671 	if (useOrientation!=b)

   672 	{

   673 		useOrientation=b;

   674 		requestReposition();

   675 	}	

   676 }

   677 

   678 LinkOrient LinkableMapObj::getOrientation()

   679 {

   680     return orientation;

   681 }

   682 

   683 int LinkableMapObj::getDepth()

   684 {

   685     return depth;

   686 }

   687 

   688 void LinkableMapObj::setMapEditor (MapEditor *me)

   689 {

   690 	mapEditor=me;

   691 }

   692 

   693 MapEditor* LinkableMapObj::getMapEditor ()

   694 {

   695 	return mapEditor;

   696 }

   697 

   698 QPoint LinkableMapObj::getRandPos()

   699 {

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

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

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

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

   704 }

   705 

   706 /*

   707 void LinkableMapObj::alignRelativeTo (QPoint ref)

   708 {

   709 	// Overloaded, only called for BO, FIO, ...

   710 	// FIXME not needed?

   711 }

   712 */

   713 

   714 void LinkableMapObj::reposition()

   715 {

   716 	// FIXME not needed? Is overloaded in BranchObj...

   717 	/*

   718 	cout << "LMO::reposition\n";

   719 	if (depth==0)

   720 	{

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

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

   723 		calcBBoxSizeWithChilds();

   724 

   725 	    alignRelativeTo ( QPoint (absPos.x(),

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

   727 	} else

   728 	{

   729 		// This is only important for moving branches:

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

   731 		cout << "  reposition to abs "<<absPos<<endl;

   732 	    alignRelativeTo ( QPoint (absPos.x(),

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

   734 	}

   735 	*/

   736 }

   737 

   738 void LinkableMapObj::requestReposition()

   739 {

   740 	if (!repositionRequest)

   741 	{

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

   743 		// been done yet

   744 		repositionRequest=true;

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

   746 	}

   747 }

   748 

   749 void LinkableMapObj::forceReposition()

   750 {

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

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

   753 	// which could collect requests for a reposition.

   754 	// Then we have to call forceReposition()

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

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

   757 	// the end, thus check first:

   758 

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

   760 	

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

   762 	

   763 	if (parObj) 

   764 		parObj->forceReposition(); 

   765 	else 

   766 		reposition(); 

   767 }

   768 

   769 bool LinkableMapObj::repositionRequested()

   770 {

   771 	return repositionRequest;

   772 }

   773 

   774 

   775 void LinkableMapObj::setSelBox()

   776 {

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

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

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

   780 }

   781 

   782 void LinkableMapObj::select()

   783 {

   784 	setSelBox();

   785     selected=true;

   786     selbox->show();

   787 // FIXME not needed?	

   788 	setVisibility (visible);

   789 }

   790 

   791 

   792 void LinkableMapObj::unselect()

   793 {

   794     selected=false;

   795     selbox->hide();

   796 	// Maybe we have to hide the link:

   797 	setVisibility (visible);

   798 }

   799 

   800 void LinkableMapObj::parabel (Q3PointArray &ya, double p1x, double p1y, double p2x, double p2y)

   801 

   802 {

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

   804 	double vy=p2y - p1y;

   805 

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

   807 	

   808 	double pnx;				// next point

   809 	double pny;

   810 	double m;

   811 

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

   813 		m=0;

   814 	else	

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

   816 	dx=vx/(arcsegs);

   817 	int i;

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

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

   820 	{	

   821 		pnx=p1x+dx;

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

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

   824 		p1x=pnx;

   825 		p1y=pny;

   826 	}	

   827 }

   828 

   829 QString LinkableMapObj::getLinkAttr ()

   830 {

   831 	if (hideLinkUnselected)

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

   833 	else

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

   835 	

   836 }
vym