Changeset 1103:f196dc4f1b31 in lemon-0.x

Timestamp:

01/28/05 10:09:59 (20 years ago)

Author:

Alpar Juttner

Branch:

default

Phase:

public

Convert:

svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk@1502

Message:

Add a 'scaleToA4()' function.

Location:

src

Files:

• demo/graph_to_eps_demo.cc (modified) (1 diff)
• lemon/graph_to_eps.h (modified) (10 diffs)

src/demo/graph_to_eps_demo.cc

@@ -141 +141 @@
     nodeTexts(id).nodeTextSize(3).
     enableParallel().parEdgeDist(1).
-    //    hideNodes().
     drawArrows().arrowWidth(1).arrowLength(1).
-    run();;
+    run();
+
+  graphToEps(g,"graph_to_eps_demo_out_a4.eps").scaleToA4().
+    nodeScale(2).nodeSizes(sizes).
+    coords(coords).
+    nodeShapes(shapes).
+    nodeColors(composeMap(colorSet,colors)).
+    edgeColors(composeMap(colorSet,ecolors)).
+    edgeWidthScale(.3).edgeWidths(widths).
+    nodeTexts(id).nodeTextSize(3).
+    enableParallel().parEdgeDist(1).
+    drawArrows().arrowWidth(1).arrowLength(1).
+    run();
+
 }

src/lemon/graph_to_eps.h

@@ -87 +87 @@
 
   ConstMap<typename Graph::Edge,double > _edgeWidths;
+
+  static const double A4HEIGHT = 841.8897637795276;
+  static const double A4WIDTH  = 595.275590551181;
+  static const double A4BORDER = 15;
+
   
   double _edgeWidthScale;
@@ -113 +118 @@
   bool _undir;
   bool _pleaseRemoveOsStream;
+
+  bool _scaleToA4;
+  
   ///Constructor
 
@@ -136 +144 @@
     _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
     _undir(false),
-    _pleaseRemoveOsStream(_pros) {}
+    _pleaseRemoveOsStream(_pros), _scaleToA4(false) {}
 };
 
@@ -144 +152 @@
 ///\todo Is 'helper class' a good name for this?
 ///
+///\todo Follow PostScript's DSC.
+///\todo Use own dictionary.
 template<class T> class GraphToEps : public T 
 {
@@ -202 +212 @@
 
   ///Sets the map of the node coordinates.
-  ///\param x must be a node map with xy<double> or xy<int> values. 
+  ///\param x must be a node map with xy<double> or \ref xy "xy<int>" values. 
   template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
     dontPrint=true;
@@ -359 +369 @@
   ///
   GraphToEps<T> &arrowWidth(double d) {_arrowWidth*=d;return *this;}
+  
+  ///Scales the drawing to fit to A4 page
+
+  ///Scales the drawing to fit to A4 page
+  ///
+  GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
   
   ///Enables parallel edges
@@ -442 +458 @@
       bb+=-p+_coords[n];
       }
-    os << "%%BoundingBox: "
-         << bb.left()*  _scale-_xBorder << ' '
-         << bb.bottom()*_scale-_yBorder << ' '
-         << bb.right()* _scale+_xBorder << ' '
-         << bb.top()*   _scale+_yBorder << '\n';
+    if(!_scaleToA4) os << "%%BoundingBox: "
+                      << bb.left()*  _scale-_xBorder << ' '
+                      << bb.bottom()*_scale-_yBorder << ' '
+                      << bb.right()* _scale+_xBorder << ' '
+                      << bb.top()*   _scale+_yBorder << '\n';
     //x1 y1 x2 y2 x3 y3 cr cg cb w
     os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
@@ -497 +513 @@
 
     os << "\ngsave\n";
-    if(_scale!=1.0) os << _scale << " dup scale\n";
+    if(_scaleToA4)
+      if(bb.height()>bb.width()) {
+        double sc= min((A4HEIGHT-2*A4BORDER)/bb.height(),
+                  (A4WIDTH-2*A4BORDER)/bb.width());
+        os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
+           << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER << " translate\n"
+           << sc << " dup scale\n"
+           << -bb.left() << ' ' << -bb.bottom() << " translate\n";
+      }
+      else {
+        //\todo Verify centering
+        double sc= min((A4HEIGHT-2*A4BORDER)/bb.width(),
+                  (A4WIDTH-2*A4BORDER)/bb.height());
+        os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
+           << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER  << " translate\n"
+           << sc << " dup scale\n90 rotate\n"
+           << -bb.left() << ' ' << -bb.top() << " translate\n"; 
+        }
+    else if(_scale!=1.0) os << _scale << " dup scale\n";
     
     if(_showEdges) {
@@ -659 +693 @@
     }
     
-    os << "grestore\n";
+    os << "grestore\nshowpage\n";
 
     //CleanUp:
@@ -698 +732 @@
 ///Generates an EPS file from a graph
 
-//\ingroup misc
+///\ingroup misc
 ///This function does the same as
 ///\ref graphToEps(G &g,std::ostream& os)