java - how to export a graph to svg/graphml -

i little bit stuck on how export graphs svg or graphml. neither api, examples or threads on forum.jgraph.com did me until now.

i need export graphs both svg , graphml. got svg display nodes , edges correct layout, i'm missing information names of nodes , assigned colors.

with graphml have no clue yet how correct xml code display functioning graph.

is there guideline/workflow somewhere might me export in jgraphx?

thanks in advance help,

chris

in order save graph have call mxcellrendered render graph mxicanvas document (dom document). renderer goes this: mxgraph.drawcell() -> mxgraph.drawstate() -> mxicanvas.drawcell() -> mxicanvas.drawshape() mxicanvas knows cell's geometry , style.

i wanted cell id attribute added in svg file well, did following

1. extended mxgraph override drawcell() in order add cell id in style of cell, ,
2. extended mxsvgcanvas adding id attribute shapes interested me

the function save svg graph goes like:

// use extended svg canvas, cell id added attribute public void createsvg(mxgraphextended g) {   string filename = "\home\koula\graph.svg";   mxsvgcanvasextended canvas = (mxsvgcanvasextended) mxcellrenderer.drawcells(     g, null, 1, null, new canvasfactory() {     public mxicanvas createcanvas(int width, int height) {         mxsvgcanvasextended canvas = new mxsvgcanvasextended(mxdomutils             .createsvgdocument(width, height));             canvas.setembedded(true);             return canvas;         }      });   try {     mxutils.writefile(mxxmlutils.getxml(canvas.getdocument()), filename);   } catch (ioexception e) {     e.printstacktrace();   }  } 

the overriden drawcell():

public class mxgraphextended extends mxgraph {      @override     public void drawcell(mxicanvas canvas, object cell) {         // add cell's id style attribute         // cause canvas style , geometry         mxcellstate state = this.getview().getstate(cell);         state.getstyle().put("cellid", ((mxcell)cell).getid());          super.drawcell(canvas, cell);     } } 

the overridden drawshape() goes like:

public class mxsvgcanvasextended extends mxsvgcanvas {      //... have coppied related code      @override     public element drawshape(int x, int y, int w, int h,          map<string, object> style)     {          //...            // draws shape          string shape = mxutils.getstring(style, mxconstants.style_shape, "");          string cellid = mxutils.getstring(style, "cellid", "");          element elem = null;          // ...           // e.g. if image, add cell id          if (shape.equals(mxconstants.shape_image)) {             string img = getimageforstyle(style);             if (img != null) {                 // vertical , horizontal image flipping                 boolean fliph = mxutils.istrue(style,                      mxconstants.style_image_fliph, false);                 boolean flipv = mxutils.istrue(style,                      mxconstants.style_image_flipv, false);                 elem = createimageelement(x, y, w, h, img,                     preserve_image_aspect, fliph, flipv, isembedded());                 /* here */                  // add cell id atribute                  if(!cellid.equals("")) {                     elem.setattribute("id", cellid);                 }             }         } else if (shape.equals(mxconstants.shape_line))             // ...          }// end drawshape       } // end class 

hope help.