Changeset 1085:5b7ca75297b5 in lemon-0.x

Timestamp:

01/16/05 23:34:51 (19 years ago)

Author:

Alpar Juttner

Branch:

default

Phase:

public

Convert:

svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk@1481

Message:

• Parallel edges look a bit better
• Possibility to insert verbatim PS blocks for each node

File:

• src/lemon/graph_to_eps.h (modified) (12 diffs)

src/lemon/graph_to_eps.h

@@ -106 +106 @@
   double _nodeTextSize;
 
+  bool _showNodePsText;
+  ConstMap<typename Graph::Node,bool > _nodePsTexts;  
+  char *_nodePsTextsPreamble;
+  
   bool _undir;
   bool _pleaseRemoveOsStream;
@@ -129 +133 @@
     _enableParallel(false), _parEdgeDist(1),
     _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
+    _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
     _undir(false),
     _pleaseRemoveOsStream(_pros) {}
@@ -225 +230 @@
     return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
   }
-   template<class X> struct EdgeWidthsTraits : public T {
+  template<class X> struct NodePsTextsTraits : public T {
+    const X &_nodePsTexts;
+    NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
+  };
+  ///Inserts a PostScript block to the nodes
+
+  ///With this command it is possible to insert a verbatim PostScript
+  ///block to the nodes.
+  ///The PS current point will be moved to the centre of the node before
+  ///the PostScript block inserted.
+  ///
+  ///Before and after the block a newline character is inserted to you
+  ///don't have to bother with the separators.
+  ///
+  ///\param x must be a node map with type that can be pushed to a standard
+  ///ostream.
+  ///
+  ///\sa nodePsTextsPreamble()
+  ///\todo Offer the choise not to move to the centre but pass the coordinates
+  ///to the Postscript block inserted.
+  template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
+  {
+    dontPrint=true;
+    _showNodePsText=true;
+    return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
+  }
+  template<class X> struct EdgeWidthsTraits : public T {
     const X &_edgeWidths;
     EdgeWidthsTraits(const T &t,const X &x) : T(t), _edgeWidths(x) {}
@@ -338 +369 @@
   ///
   GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
+  ///Gives a preamble block for node Postscript block.
+  
+  ///Gives a preamble block for node Postscript block.
+  ///
+  ///\sa nodePsTexts()
+  GraphToEps<T> & nodePsTextsPreamble(const char *str) {
+    _nodePsTextsPreamble=s ;return *this;
+  }
   ///Sets whether the the graph is undirected
 
@@ -402 +441 @@
     if(_scale!=1.0) os << _scale << " dup scale\n";
     
-    os << "%Edges:\ngsave\n";
-    
-    if(_showEdges)
+    if(_showEdges) {
+      os << "%Edges:\ngsave\n";      
       if(_enableParallel) {
         std::vector<Edge> el;
@@ -420 +458 @@
           sw-=_parEdgeDist;
           sw/=-2.0;
-          xy<double> d(_coords[g.target(*i)]-_coords[g.source(*i)]);
-          double l=sqrt(d.normSquare());
-          d/=l;
-          
+          xy<double> dvec(_coords[g.target(*i)]-_coords[g.source(*i)]);
+          double l=sqrt(dvec.normSquare());
+          xy<double> d(dvec/l);
+          xy<double> m;
+//        m=xy<double>(_coords[g.target(*i)]+_coords[g.source(*i)])/2.0;
+
+//        m=xy<double>(_coords[g.source(*i)])+
+//          dvec*(double(_nodeSizes[g.source(*i)])/
+//             (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
+
+          m=xy<double>(_coords[g.source(*i)])+
+            d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
+
           for(typename std::vector<Edge>::iterator e=i;e!=j;++e) {
             sw+=_edgeWidths[*e]*_edgeWidthScale/2.0;
-            xy<double> m(_coords[g.target(*e)]+_coords[g.source(*e)]);
-            m=m/2.0+rot(d)*sw/.75;
+            xy<double> mm=m+rot(d)*sw/.75;
             if(_drawArrows) {
               const int INERPOL_PREC=20;
@@ -434 +480 @@
               double rn=_nodeSizes[g.target(*e)]*_nodeScale;
               rn*=rn;
-              Bezier3 bez(s,m,m,t);
+              Bezier3 bez(s,mm,mm,t);
               double t1=0,t2=1;
               for(int i=0;i<INERPOL_PREC;++i)
@@ -473 +519 @@
               os << _coords[g.source(*e)].x << ' '
                  << _coords[g.source(*e)].y << ' '
-                 << m.x << ' ' << m.y << ' '
+                 << mm.x << ' ' << mm.y << ' '
                  << _coords[g.target(*e)].x << ' '
                  << _coords[g.target(*e)].y << ' '
@@ -510 +556 @@
                   << _edgeColors[e].getB() << ' '
                   << _edgeWidths[e]*_edgeWidthScale << " l\n";
-    os << "grestore\n%Nodes:\ngsave\n";
-    if(_showNodes)
+      os << "grestore\n";
+    }
+    if(_showNodes) {
+      os << "%Nodes:\ngsave\n";
       for(NodeIt n(g);n!=INVALID;++n)
         os << _coords[n].x << ' ' << _coords[n].y << ' '
@@ -517 +565 @@
            << _nodeColors[n].getR() << ' '
            << _nodeColors[n].getG() << ' '
-           << _nodeColors[n].getB() << " n\n"; 
+           << _nodeColors[n].getB() << " n\n";
+      os << "grestore\n";
+    }
     if(_showNodeText) {
-      os << "grestore\n%Node texts:\ngsave\n";
+      os << "%Node texts:\ngsave\n";
       os << "/fosi " << _nodeTextSize << " def\n";
       os << "(Helvetica) findfont fosi scalefont setfont\n";
@@ -526 +576 @@
         os << _coords[n].x << ' ' << _coords[n].y
            << " (" << _nodeTexts[n] << ") cshow\n";
+      os << "grestore\n";
     }
-    os << "grestore\ngrestore\n";
+    if(_showNodePsText) {
+      os << "%Node PS blocks:\ngsave\n";
+      for(NodeIt n(g);n!=INVALID;++n)
+        os << _coords[n].x << ' ' << _coords[n].y
+           << " moveto\n" << _nodePsTexts[n] << "\n";
+      os << "grestore\n";
+    }
+    
+    os << "grestore\n";
 
     //CleanUp:
@@ -577 +636 @@
 }
 
-//Generates an EPS file from a graph.
-//\param g is a reference to the graph to be printed
-//\param file_name is the output file_name.
-//
-//This function also has a lot of \ref named-templ-param "named parameters",
-//they are declared as the members of class \ref GraphToEps. The following
-//example shows how to use these parameters.
-//\code
-// graphToEps(g).scale(10).coords(coords)
-//              .nodeScale(2).nodeSizes(sizes)
-//              .edgeWidthScale(.4);
-//\endcode
-//\sa GraphToEps
-//\todo Avoid duplicated documentation
-//\bug Exception handling is missing? (Or we can just ignore it?)
-
 } //END OF NAMESPACE LEMON