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xlinkobj.cpp
author jhilmer
Tue Aug 16 17:27:34 2005 +0000 (2005-08-16)
changeset 153 47cd4ae30000
parent 104 270593ab83b2
child 298 d1d636eec6b1
permissions -rw-r--r--
Fixed link handling in aboutdialog 
     1 #include "xlinkobj.h"

     2 #include "branchobj.h"

     3 #include "mapeditor.h"

     4 

     5 

     6 /////////////////////////////////////////////////////////////////

     7 // XLinkObj

     8 /////////////////////////////////////////////////////////////////

     9 

    10 int XLinkObj::arrowSize=10;						// make instances 

    11 

    12 XLinkObj::XLinkObj ():MapObj() 

    13 {

    14 	//	cout << "Const XLinkObj ()\n";

    15 	init();

    16 }

    17 

    18 XLinkObj::XLinkObj (QCanvas* c):MapObj(c)

    19 {

    20 	//	cout << "Const XLinkObj (c)  called from MapCenterObj (c)\n";

    21 	init();

    22 }

    23 

    24 

    25 XLinkObj::~XLinkObj ()

    26 {

    27 	//	cout << "Destr XLinkObj\n";

    28 	if (xLinkState!=undefinedXLink)

    29 		deactivate();

    30 	delete (line);

    31 	delete (poly);

    32 }

    33 

    34 void XLinkObj::init () 

    35 {

    36 	beginBranch=NULL;

    37 	endBranch=NULL;

    38 	visBranch=NULL;

    39 	xLinkState=undefinedXLink;

    40 

    41 	color=QColor (180,180,180);

    42 	line=new QCanvasLine (canvas);

    43 	width=1;

    44 	line->setPen (QPen(color, width));

    45 	line->setZ (Z_XLINK);

    46 

    47 	poly=new QCanvasPolygon (canvas);

    48 	poly->setBrush( color );

    49 	poly->setZ (Z_XLINK);

    50 

    51 	setVisibility (false);

    52 }

    53 

    54 void XLinkObj::copy (XLinkObj* other)

    55 {

    56 	// TODO copy not used yet

    57 	MapObj::copy (other);

    58 	setVisibility (other->visible);

    59 	beginBranch=other->beginBranch;

    60 	endBranch=other->endBranch;

    61 }

    62 

    63 void XLinkObj::setBegin (BranchObj *bo)

    64 {

    65 	if (bo) 

    66 	{

    67 		xLinkState=initXLink;

    68 		beginBranch=bo;

    69 		beginPos=beginBranch->getChildPos();

    70 	}	

    71 }

    72 

    73 void XLinkObj::setEnd (BranchObj *bo)

    74 {

    75 	if (bo) 

    76 	{

    77 		xLinkState=initXLink;

    78 		endBranch=bo;

    79 		endPos=endBranch->getChildPos();

    80 	}		

    81 }

    82 

    83 void XLinkObj::setWidth (int w)

    84 {

    85 	width=w;

    86 	setColor (color);

    87 }

    88 

    89 int XLinkObj::getWidth()

    90 {

    91 	return width;

    92 }

    93 

    94 void XLinkObj::setColor(QColor c)

    95 {

    96 	color=c;

    97 	line->setPen (QPen(color, width));

    98 	poly->setBrush( color );

    99 }

   100 

   101 QColor XLinkObj::getColor()

   102 {

   103 	return color;

   104 }

   105 

   106 void XLinkObj::setEnd (QPoint p)

   107 {

   108 	endPos=p;

   109 }

   110 

   111 bool XLinkObj::activate ()

   112 {

   113 	if (beginBranch && endBranch)

   114 	{

   115 		if (beginBranch==endBranch) return false;

   116 		xLinkState=activeXLink;

   117 		beginBranch->addXLink (this);

   118 		endBranch->addXLink (this);

   119 		setVisibility ();

   120 		return true;

   121 	} else

   122 		return false;

   123 }

   124 

   125 void XLinkObj::deactivate ()

   126 {

   127 	if (beginBranch)

   128 		beginBranch->removeXLinkRef (this);

   129 	beginBranch=NULL;	

   130 	if (endBranch)

   131 		endBranch->removeXLinkRef (this);

   132 	endBranch=NULL;	

   133 	visBranch=NULL;

   134 	xLinkState=undefinedXLink;

   135 

   136 	line->hide();

   137 }

   138 

   139 bool XLinkObj::isUsed()

   140 {

   141 	if (beginBranch || endBranch || xLinkState!=undefinedXLink)

   142 		return true;

   143 	else

   144 		return false;

   145 }

   146 

   147 void XLinkObj::updateXLink()

   148 {

   149 	QPoint a,b;

   150 	QPointArray pa (3);

   151 	if (visBranch)

   152 	{

   153 		// Only one of the linked branches is visible

   154 		a=b=visBranch->getChildPos();

   155 		if (visBranch->getOrientation()==OrientRightOfCenter)

   156 		{

   157 			b.setX (b.x()+25);

   158 			pa.putPoints (0,3,

   159 				b.x(),b.y(),

   160 				b.x()-arrowSize,b.y()-arrowSize,

   161 				b.x()-arrowSize,b.y()+arrowSize

   162 			);

   163 			poly->setPoints (pa);

   164 		} else

   165 		{

   166 			b.setX (b.x()-25);

   167 			pa.putPoints (0,3,

   168 				b.x(),b.y(),

   169 				b.x()+arrowSize,b.y()-arrowSize,

   170 				b.x()+arrowSize,b.y()+arrowSize);

   171 			poly->setPoints (pa);

   172 		}	

   173 	} else

   174 	{

   175 		// Both linked branches are visible

   176 		if (beginBranch)

   177 			// If a link is just drawn in the editor,

   178 			// we have already a beginBranch

   179 			a=beginBranch->getChildPos();

   180 		else

   181 			// This shouldn't be reached normally...

   182 			a=beginPos;

   183 		if (xLinkState==activeXLink && endBranch)

   184 			b=endBranch->getChildPos();

   185 		else

   186 			b=endPos;

   187 	}

   188 

   189 

   190 	if (line->startPoint()==a && line->endPoint()==b && !visBranch)

   191 	{

   192 		// update is called from both branches, so only

   193 		// update if something has changed

   194 		return;

   195 	}	

   196 	else

   197 	{

   198 		beginPos=a;

   199 		endPos=b;

   200 		line->setPen (QPen(color, width));

   201 		line->setPoints (a.x(), a.y(), b.x(), b.y());

   202 	}

   203 }

   204 

   205 BranchObj* XLinkObj::otherBranch(BranchObj* thisBranch)

   206 {

   207 	if (!beginBranch && !endBranch)

   208 		return NULL;

   209 	if (thisBranch==beginBranch)

   210 		return endBranch;

   211 	else	

   212 		return beginBranch;

   213 }

   214 

   215 void XLinkObj::positionBBox()

   216 {

   217 }

   218 

   219 void XLinkObj::calcBBoxSize()

   220 {

   221 }

   222 

   223 void XLinkObj::setVisibility (bool b)

   224 {

   225 	MapObj::setVisibility (b);

   226 	if (b)

   227 	{

   228 		line->show();

   229 		if (visBranch) 

   230 			poly->show();

   231 		else	

   232 			poly->hide();

   233 	}	

   234 	else

   235 	{

   236 		line->hide();

   237 		poly->hide();

   238 	}	

   239 }

   240 

   241 void XLinkObj::setVisibility ()

   242 {

   243 	if (beginBranch && endBranch)

   244 	{

   245 		if(beginBranch->isVisibleObj() && endBranch->isVisibleObj())

   246 		{	// Both ends are visible

   247 			visBranch=NULL;

   248 			setVisibility (true);

   249 		} else

   250 		{

   251 			if(!beginBranch->isVisibleObj() && !endBranch->isVisibleObj())

   252 			{	//None of the ends is visible

   253 				visBranch=NULL;

   254 				setVisibility (false);

   255 			} else

   256 			{	// Just one end is visible, draw a symbol that shows

   257 				// that there is a link to a scrolled branch

   258 				if (beginBranch->isVisibleObj())

   259 					visBranch=beginBranch;

   260 				else

   261 					visBranch=endBranch;

   262 				setVisibility (true);

   263 			}

   264 		}

   265 	}

   266 }

   267 

   268 QString XLinkObj::saveToDir ()

   269 {

   270 	QString s="";

   271 	if (beginBranch && endBranch &&xLinkState==activeXLink)

   272 	{

   273 		if (beginBranch==endBranch && xLinkState)

   274 			s="";

   275 		else

   276 		{

   277 			QString colAttr=attribut ("color",color.name());

   278 			QString widAttr=attribut ("width",QString().setNum(width,10));

   279 			QString begSelAttr=attribut ("beginBranch",beginBranch->getSelectString());

   280 			QString endSelAttr=attribut ("endBranch",  endBranch->getSelectString());

   281 			s=beginElement ("xlink", colAttr +widAttr +begSelAttr +endSelAttr);

   282 

   283 			s+=endElement ("xlink");

   284 		}

   285 	}

   286 	return s;

   287 }

   288
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