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linkablemapobj.cpp
author insilmaril
Thu, 14 Sep 2006 11:38:17 +0000
changeset 383 bf5ba1bd4764
parent 366 e95081c21da2
child 388 3a58c9ef4a18
permissions -rw-r--r--
1.8.57 - more changes in history window, Note Editor is QT4 now 
     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 		relPos=getRelPos();

   158 

   159 		parObj->calcBBoxSize();

   160 		parObj->requestReposition();

   161 	}	

   162 }

   163 

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

   165 {

   166 	relPos=p;

   167 	if (parObj)

   168 	{	parObj->calcBBoxSize();

   169 		parObj->requestReposition();

   170 	}	

   171 }

   172 

   173 QPoint LinkableMapObj::getRelPos()

   174 {

   175 	if (!parObj) return QPoint();

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

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

   178 	return relPos;

   179 }

   180 

   181 int LinkableMapObj::getTopPad()

   182 {

   183 	return topPad;

   184 }

   185 

   186 int LinkableMapObj::getLeftPad()

   187 {

   188 	return leftPad;

   189 }

   190 

   191 int LinkableMapObj::getRightPad()

   192 {

   193 	return rightPad;

   194 }

   195 

   196 LinkStyle LinkableMapObj::getDefLinkStyle ()

   197 {

   198 	if (!mapEditor) return StyleUndef;

   199 

   200 	LinkStyle ls=mapEditor->getLinkStyle();

   201 	switch (ls)

   202 	{

   203 		case StyleLine: 

   204 			return ls;

   205 			break;

   206 		case StyleParabel:

   207 			return ls;

   208 			break;

   209 		case StylePolyLine:	

   210 			if (depth>1)

   211 				return StyleLine;

   212 			else	

   213 				return ls;

   214 			break;

   215 		case StylePolyParabel:	

   216 			if (depth>1)

   217 				return StyleParabel;

   218 			else	

   219 				return ls;

   220 			break;

   221 		default: 

   222 			break;	

   223 	}	

   224 	return StyleUndef;

   225 }

   226 

   227 void LinkableMapObj::setLinkStyle(LinkStyle newstyle)

   228 {

   229 	//if (newstyle=style) return;

   230 	delLink();

   231 		

   232 	style=newstyle;

   233 

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

   235     {

   236 		int i;

   237 		Q3CanvasLine* cl;

   238 		switch (style)

   239 		{

   240 			case StyleUndef:

   241 				bottomline->hide();

   242 				break;

   243 			case StyleLine: 

   244 				l = new Q3CanvasLine(canvas);

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

   246 				l->setZ(Z_LINK);

   247 				if (visible)

   248 					l->show();

   249 				else

   250 					l->hide();

   251 				break;

   252 			case StyleParabel:

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

   254 				{

   255 					cl = new Q3CanvasLine(canvas);

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

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

   258 					cl->setZ(Z_LINK);

   259 					if (visible)

   260 						cl->show();

   261 					else

   262 						cl->hide();

   263 					segment.append(cl);

   264 				}

   265 				pa0.resize (arcsegs+1);

   266 				break;

   267 			case StylePolyLine:	

   268 				p = new Q3CanvasPolygon(canvas);

   269 				p->setBrush( linkcolor );

   270 				p->setZ(Z_LINK);

   271 				if (visible)

   272 					p->show();

   273 				else

   274 					p->hide();

   275 				pa0.resize (3);

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

   277 				// missing pixels, when polygon is extremly flat

   278 				l = new Q3CanvasLine(canvas);

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

   280 				l->setZ(Z_LINK);

   281 				if (visible)

   282 					l->show();

   283 				else

   284 					l->hide();

   285 				break;

   286 			case StylePolyParabel:	

   287 				p = new Q3CanvasPolygon(canvas);

   288 				p->setBrush( linkcolor );

   289 				p->setZ(Z_LINK);

   290 				if (visible)

   291 					p->show();

   292 				else

   293 					p->hide();

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

   295 				pa1.resize (arcsegs+1);

   296 				pa2.resize (arcsegs+1);

   297 

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

   299 				// to polygon, to avoid missing pixels, 

   300 				// if polygon is extremly flat

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

   302 				{

   303 					cl = new Q3CanvasLine(canvas);

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

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

   306 					cl->setZ(Z_LINK);

   307 					if (visible)

   308 						cl->show();

   309 					else

   310 						cl->hide();

   311 					segment.append(cl);

   312 				}

   313 				break;

   314 			default: 

   315 				break;	

   316 		}	

   317 	} 

   318 }

   319 

   320 LinkStyle LinkableMapObj::getLinkStyle()

   321 {

   322 	return style;

   323 }

   324 

   325 void LinkableMapObj::setHideLinkUnselected(bool b)

   326 {

   327 	hideLinkUnselected=b;

   328 	setVisibility (visible);

   329 	updateLink();

   330 }

   331 

   332 bool LinkableMapObj::getHideLinkUnselected()

   333 {

   334 	return hideLinkUnselected;

   335 }

   336 

   337 void LinkableMapObj::setLinkPos(LinkPos lp)

   338 {

   339 	linkpos=lp;

   340 }

   341 

   342 LinkPos LinkableMapObj::getLinkPos()

   343 {

   344 	return linkpos;

   345 }

   346 

   347 

   348 void LinkableMapObj::setLinkColor()

   349 {

   350 	// Overloaded in BranchObj and childs

   351 	// here only set default color

   352 	if (mapEditor)

   353 		setLinkColor (mapEditor->getDefLinkColor());

   354 }

   355 

   356 void LinkableMapObj::setLinkColor(QColor col)

   357 {

   358 	linkcolor=col;

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

   360 	Q3CanvasLine *cl;

   361 	switch (style)

   362 	{

   363 		case StyleLine:

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

   365 			break;	

   366 		case StyleParabel:	

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

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

   369 			break;

   370 		case StylePolyLine:

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

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

   373 			break;

   374 		case StylePolyParabel:	

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

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

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

   378 			break;

   379 		default:

   380 			break;

   381 	} // switch (style)	

   382 }

   383 

   384 QColor LinkableMapObj::getLinkColor()

   385 {

   386 	return linkcolor;

   387 }

   388 

   389 FrameType LinkableMapObj::getFrameType()

   390 {

   391 	return frame->getFrameType();

   392 }

   393 

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

   395 {

   396 	frame->setFrameType(t);

   397 	calcBBoxSize();

   398 	positionBBox();

   399 	requestReposition();

   400 }

   401 

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

   403 {

   404 	frame->setFrameType(t);

   405 	calcBBoxSize();

   406 	positionBBox();

   407 	requestReposition();

   408 }

   409 

   410 void LinkableMapObj::setVisibility (bool v)

   411 {

   412 	Q3CanvasLine* cl;

   413 	MapObj::setVisibility (v);

   414 	bool visnow=visible;

   415 

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

   417 	if (hideLinkUnselected && !selected)

   418 		visnow=false;

   419 

   420 	if (visnow) 

   421 	{

   422 		bottomline->show();

   423 		switch (style)

   424 		{

   425 			case StyleLine:

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

   427 				break;

   428 			case StyleParabel:	

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

   430 					cl->show();

   431 				break;	

   432 			case StylePolyLine:

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

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

   435 				break;

   436 			case StylePolyParabel:	

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

   438 					cl->show();

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

   440 				break;

   441 			default:

   442 				break;

   443 		}

   444 	} else 

   445 	{

   446 		bottomline->hide();

   447 		switch (style)

   448 		{

   449 			case StyleLine:

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

   451 				break;

   452 			case StyleParabel:	

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

   454 					cl->hide();

   455 				break;	

   456 			case StylePolyLine:

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

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

   459 				break;

   460 			case StylePolyParabel:	

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

   462 					cl->hide();

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

   464 				break;

   465 			default:

   466 				break;

   467 		}

   468 	}	

   469 }

   470 

   471 void LinkableMapObj::updateLink()

   472 {

   473     // needs:

   474     //	childPos of parent

   475     //	orient   of parent

   476     //	style

   477     // 

   478     // sets:

   479     //	orientation

   480     //	childPos	(by calling setDockPos())

   481     //	parPos		(by calling setDockPos())

   482 	//  bottomlineY

   483     //	drawing of the link itself

   484 

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

   486 	// have parents yet...

   487 	if (style==StyleUndef) return;	

   488 

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

   490 		linkpos=LinkBottom;

   491 	else	

   492 		linkpos=LinkMiddle;

   493 	switch (linkpos)

   494 	{

   495 		case LinkMiddle:

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

   497 			break;

   498 		default :

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

   500 			break;

   501 	}

   502 	

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

   504 	if (!link2ParPos)

   505 	{

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

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

   508 	} else	

   509 	{

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

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

   512 	} 

   513 

   514 	LinkOrient orientOld=orientation;

   515 

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

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

   518 		// use the orientation of the parent:

   519 		orientation=parObj->getOrientation();

   520     else

   521     {

   522 		// calc orientation depending on position rel to mapCenter

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

   524 			orientation=OrientLeftOfCenter; 

   525 		else

   526 			orientation=OrientRightOfCenter;

   527     }

   528 

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

   530 	{

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

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

   533 		// linking of subranch to itself => segfault

   534 		//

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

   536 		// no need to reposition now

   537 		reposition();

   538 	}

   539 	

   540 	setDockPos();

   541 

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

   543 	double p1y=parPos.y();

   544 

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

   546 	double vy=p2y - p1y;

   547 

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

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

   550 		qRound(childPos.y()),

   551 		qRound(p1x),

   552 		qRound(p1y) );

   553 

   554 	double a;	// angle

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

   556 		a=M_PI_2;

   557 	else

   558 		a=atan( vy / vx );

   559 	// "turning point" for drawing polygonal links

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

   561 	

   562 	Q3CanvasLine *cl;

   563 

   564 	int i;

   565 

   566     // Draw the link

   567 	switch (style)

   568 	{

   569 		case StyleLine:

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

   571 				qRound(parPos.y()),

   572 				qRound(p2x),

   573 				qRound(p2y) );

   574 			break;	

   575 		case StyleParabel:	

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

   577 			i=0;

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

   579 			{	

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

   581 				i++;

   582 			}

   583 			break;

   584 		case StylePolyLine:

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

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

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

   588 			p->setPoints (pa0);

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

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

   591 				qRound(parPos.y()),

   592 				qRound(p2x),

   593 				qRound(p2y) );

   594 			break;

   595 		case StylePolyParabel:	

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

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

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

   599 			{

   600 				// Combine the arrays to a single one

   601 				pa0[i]=pa1[i];

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

   603 			}	

   604 			p->setPoints (pa0);

   605 			i=0;

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

   607 			{	

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

   609 				i++;

   610 			}

   611 			break;

   612 		default:

   613 			break;

   614 	} // switch (style)	

   615 }

   616 	

   617 LinkableMapObj* LinkableMapObj::getChildObj()

   618 {

   619     return childObj;

   620 }

   621 

   622 LinkableMapObj* LinkableMapObj::getParObj()

   623 {

   624     return parObj;

   625 }

   626 

   627 LinkableMapObj* LinkableMapObj::findObjBySelect (QString s)

   628 {

   629 	LinkableMapObj *lmo=this;

   630 	QString part;

   631 	QString typ;

   632 	QString num;

   633 	while (!s.isEmpty() )

   634 	{

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

   636 		typ=part.left (3);

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

   638 		if (typ=="mc:")

   639 		{

   640 			if (depth>0)

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

   642 			else

   643 				break;

   644 		} else

   645 			if (typ=="bo:")

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

   647 			else

   648 				if (typ=="fi:")

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

   650 		if (!lmo) break;

   651 		

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

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

   654 		else	

   655 			break;

   656 	}

   657 	return lmo;

   658 }

   659 

   660 void LinkableMapObj::setDockPos()

   661 {

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

   663 }

   664 

   665 QPoint LinkableMapObj::getChildPos()

   666 {

   667     return childPos;

   668 }

   669 

   670 QPoint LinkableMapObj::getParPos()

   671 {

   672     return parPos;

   673 }

   674 

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

   676 {	

   677 	if (useOrientation!=b)

   678 	{

   679 		useOrientation=b;

   680 		requestReposition();

   681 	}	

   682 }

   683 

   684 LinkOrient LinkableMapObj::getOrientation()

   685 {

   686     return orientation;

   687 }

   688 

   689 int LinkableMapObj::getDepth()

   690 {

   691     return depth;

   692 }

   693 

   694 void LinkableMapObj::setMapEditor (MapEditor *me)

   695 {

   696 	mapEditor=me;

   697 }

   698 

   699 MapEditor* LinkableMapObj::getMapEditor ()

   700 {

   701 	return mapEditor;

   702 }

   703 

   704 QPoint LinkableMapObj::getRandPos()

   705 {

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

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

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

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

   710 }

   711 

   712 void LinkableMapObj::alignRelativeTo (QPoint ref)

   713 {

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

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

   716 }

   717 

   718 void LinkableMapObj::reposition()

   719 {

   720 	if (depth==0)

   721 	{

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

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

   724 		calcBBoxSizeWithChilds();

   725 

   726 	    alignRelativeTo ( QPoint (absPos.x(),

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

   728 	} else

   729 	{

   730 		// This is only important for moving branches:

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

   732 	    alignRelativeTo ( QPoint (absPos.x(),

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

   734 	}

   735 }

   736 

   737 void LinkableMapObj::requestReposition()

   738 {

   739 	if (!repositionRequest)

   740 	{

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

   742 		// been done yet

   743 		repositionRequest=true;

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

   745 	}

   746 }

   747 

   748 void LinkableMapObj::forceReposition()

   749 {

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

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

   752 	// which could collect requests for a reposition.

   753 	// Then we have to call forceReposition()

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

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

   756 	// the end, thus check first:

   757 

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

   759 	

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

   761 	

   762 	if (parObj) 

   763 		parObj->forceReposition(); 

   764 	else 

   765 		reposition(); 

   766 }

   767 

   768 bool LinkableMapObj::repositionRequested()

   769 {

   770 	return repositionRequest;

   771 }

   772 

   773 

   774 void LinkableMapObj::setSelBox()

   775 {

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

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

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

   779 }

   780 

   781 void LinkableMapObj::select()

   782 {

   783 	setSelBox();

   784     selected=true;

   785     selbox->show();

   786 // FIXME not needed?	

   787 	setVisibility (visible);

   788 }

   789 

   790 

   791 void LinkableMapObj::unselect()

   792 {

   793     selected=false;

   794     selbox->hide();

   795 	// Maybe we have to hide the link:

   796 	setVisibility (visible);

   797 }

   798 

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

   800 

   801 {

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

   803 	double vy=p2y - p1y;

   804 

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

   806 	

   807 	double pnx;				// next point

   808 	double pny;

   809 	double m;

   810 

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

   812 		m=0;

   813 	else	

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

   815 	dx=vx/(arcsegs);

   816 	int i;

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

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

   819 	{	

   820 		pnx=p1x+dx;

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

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

   823 		p1x=pnx;

   824 		p1y=pny;

   825 	}	

   826 }

   827 

   828 QString LinkableMapObj::getLinkAttr ()

   829 {

   830 	if (hideLinkUnselected)

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

   832 	else

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

   834 	

   835 }
vym