vcs.maemo.org Git - vym/blob - xlinkobj.cpp

   1 #include "xlinkobj.h"
   2 #include "branchobj.h"
   3
   4
   5 /////////////////////////////////////////////////////////////////
   6 // XLinkObj
   7 /////////////////////////////////////////////////////////////////
   8
   9 int XLinkObj::arrowSize=10;                                             // make instances
  10
  11 XLinkObj::XLinkObj ():MapObj()
  12 {
  13         //      cout << "Const XLinkObj ()\n";
  14         init();
  15 }
  16
  17 XLinkObj::XLinkObj (QGraphicsScene* s):MapObj(s)
  18 {
  19         //      cout << "Const XLinkObj (s)  called from MapCenterObj (s)\n";
  20         init();
  21 }
  22
  23
  24 XLinkObj::~XLinkObj ()
  25 {
  26 //      cout << "Destr XLinkObj\n";
  27         if (xLinkState!=undefinedXLink)
  28                 deactivate();
  29         delete (line);
  30         delete (poly);
  31 }
  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         width=1;
  43         pen.setColor (color);
  44         pen.setWidth (width);
  45         pen.setCapStyle (  Qt::RoundCap );
  46         line=scene->addLine(QLineF(1,1,1,1),pen);
  47     line->setZValue (Z_XLINK);
  48         poly=scene->addPolygon(QPolygonF(),pen,color);
  49     poly->setZValue (Z_XLINK);
  50         setVisibility (false);
  51 }
  52
  53 void XLinkObj::copy (XLinkObj* other)
  54 {
  55         // TODO copy not used yet
  56         MapObj::copy (other);
  57         setVisibility (other->visible);
  58         beginBranch=other->beginBranch;
  59         endBranch=other->endBranch;
  60         width=other->width;
  61
  62 }
  63
  64 void XLinkObj::setBegin (BranchObj *bo)
  65 {
  66         if (bo)
  67         {
  68                 xLinkState=initXLink;
  69                 beginBranch=bo;
  70                 beginPos=beginBranch->getChildPos();
  71         }
  72 }
  73
  74 BranchObj* XLinkObj::getBegin ()
  75 {
  76         return beginBranch;
  77 }
  78
  79 void XLinkObj::setEnd (BranchObj *bo)
  80 {
  81         if (bo)
  82         {
  83                 xLinkState=initXLink;
  84                 endBranch=bo;
  85                 endPos=endBranch->getChildPos();
  86         }
  87 }
  88
  89 BranchObj* XLinkObj::getEnd()
  90 {
  91         return endBranch;
  92 }
  93
  94 void XLinkObj::setWidth (int w)
  95 {
  96         width=w;
  97         pen.setWidth (w);
  98         setColor (color);
  99 }
 100
 101 int XLinkObj::getWidth()
 102 {
 103         return pen.width();
 104 }
 105
 106 void XLinkObj::setColor(QColor c)
 107 {
 108         color=c;
 109         pen.setColor (c);
 110         line->setPen (pen);
 111         poly->setBrush( color );
 112 }
 113
 114 QColor XLinkObj::getColor()
 115 {
 116         return pen.color();
 117 }
 118
 119 void XLinkObj::setEnd (QPointF p)
 120 {
 121         endPos=p;
 122 }
 123
 124 bool XLinkObj::activate ()
 125 {
 126         if (beginBranch && endBranch)
 127         {
 128                 if (beginBranch==endBranch) return false;
 129                 xLinkState=activeXLink;
 130                 beginBranch->addXLink (this);
 131                 endBranch->addXLink (this);
 132                 setVisibility ();
 133                 return true;
 134         } else
 135                 return false;
 136 }
 137
 138 void XLinkObj::deactivate ()
 139 {
 140         if (beginBranch)
 141                 beginBranch->removeXLinkRef (this);
 142         beginBranch=NULL;
 143         if (endBranch)
 144                 endBranch->removeXLinkRef (this);
 145         endBranch=NULL;
 146         visBranch=NULL;
 147         xLinkState=undefinedXLink;
 148
 149         line->hide();
 150 }
 151
 152 bool XLinkObj::isUsed()
 153 {
 154         if (beginBranch || endBranch || xLinkState!=undefinedXLink)
 155                 return true;
 156         else
 157                 return false;
 158 }
 159
 160 void XLinkObj::updateXLink()
 161 {
 162         QPointF a,b;
 163         QPolygonF pa;
 164         if (visBranch)
 165         {
 166                 // Only one of the linked branches is visible
 167                 a=b=visBranch->getChildPos();
 168                 if (visBranch->getOrientation()==LinkableMapObj::RightOfCenter)
 169                 {
 170                         b.setX (b.x()+25);
 171
 172                         pa.clear();
 173                         pa<< QPointF(b.x(),b.y())<<
 174                                 QPointF(b.x()-arrowSize,b.y()-arrowSize)<<
 175                                 QPointF(b.x()-arrowSize,b.y()+arrowSize);
 176                         poly->setPolygon(pa);
 177                 } else
 178                 {
 179                         b.setX (b.x()-25);
 180                         pa.clear();
 181                         pa<< QPointF(b.x(),b.y())<<
 182                                 QPointF(b.x()+arrowSize,b.y()-arrowSize)<<
 183                                 QPointF(b.x()+arrowSize,b.y()+arrowSize);
 184                         poly->setPolygon (pa);
 185                 }
 186         } else
 187         {
 188                 // Both linked branches are visible
 189                 if (beginBranch)
 190                         // If a link is just drawn in the editor,
 191                         // we have already a beginBranch
 192                         a=beginBranch->getChildPos();
 193                 else
 194                         // This shouldn't be reached normally...
 195                         a=beginPos;
 196                 if (xLinkState==activeXLink && endBranch)
 197                         b=endBranch->getChildPos();
 198                 else
 199                         b=endPos;
 200         }
 201
 202
 203         if (line->line().p1()==a && line->line().p2()==b && !visBranch)
 204         {
 205                 // update is called from both branches, so only
 206                 // update if something has changed
 207                 return;
 208         }
 209         else
 210         {
 211                 beginPos=a;
 212                 endPos=b;
 213                 line->setPen (pen);
 214                 line->setLine(a.x(), a.y(), b.x(), b.y());
 215         }
 216 }
 217
 218 BranchObj* XLinkObj::otherBranch(BranchObj* thisBranch)
 219 {
 220         if (!beginBranch && !endBranch)
 221                 return NULL;
 222         if (thisBranch==beginBranch)
 223                 return endBranch;
 224         else
 225                 return beginBranch;
 226 }
 227
 228 void XLinkObj::positionBBox()
 229 {
 230 }
 231
 232 void XLinkObj::calcBBoxSize()
 233 {
 234 }
 235
 236 void XLinkObj::setVisibility (bool b)
 237 {
 238         MapObj::setVisibility (b);
 239         if (b)
 240         {
 241                 line->show();
 242                 if (visBranch)
 243                         poly->show();
 244                 else
 245                         poly->hide();
 246         }
 247         else
 248         {
 249                 line->hide();
 250                 poly->hide();
 251         }
 252 }
 253
 254 void XLinkObj::setVisibility ()
 255 {
 256         if (beginBranch && endBranch)
 257         {
 258                 if(beginBranch->isVisibleObj() && endBranch->isVisibleObj())
 259                 {       // Both ends are visible
 260                         visBranch=NULL;
 261                         setVisibility (true);
 262                 } else
 263                 {
 264                         if(!beginBranch->isVisibleObj() && !endBranch->isVisibleObj())
 265                         {       //None of the ends is visible
 266                                 visBranch=NULL;
 267                                 setVisibility (false);
 268                         } else
 269                         {       // Just one end is visible, draw a symbol that shows
 270                                 // that there is a link to a scrolled branch
 271                                 if (beginBranch->isVisibleObj())
 272                                         visBranch=beginBranch;
 273                                 else
 274                                         visBranch=endBranch;
 275                                 setVisibility (true);
 276                         }
 277                 }
 278         }
 279 }
 280
 281 QString XLinkObj::saveToDir ()
 282 {
 283         QString s="";
 284         if (beginBranch && endBranch &&xLinkState==activeXLink)
 285         {
 286                 if (beginBranch==endBranch && xLinkState)
 287                         s="";
 288                 else
 289                 {
 290                         QString colAttr=attribut ("color",color.name());
 291                         QString widAttr=attribut ("width",QString().setNum(width,10));
 292                         QString begSelAttr=attribut ("beginID",beginBranch->getSelectString());
 293                         QString endSelAttr=attribut ("endID",  endBranch->getSelectString());
 294                         s=beginElement ("xlink", colAttr +widAttr +begSelAttr +endSelAttr);
 295
 296                         s+=endElement ("xlink");
 297                 }
 298         }
 299         return s;
 300 }
 301