Ich habe es geschafft, mit Hilfe von an meinem kraftgerichteten Graphen Glanzlichter zu erzeugendieses Tutorial von Mike Bostock. Jetzt für die weitere Vorgehensweise in meiner Idee und den Bedürfnissen meines Graphen bin ich ein bisschen festgefahren, zum einen, weil ich immer noch keine Ahnung von d3js habe und zum anderen habe ich noch nichts Ähnliches gefunden.

Um zu verdeutlichen, was ich vorhabe, können Sie das aktuelle Diagramm mit Hervorhebungen unter folgendem Link anzeigen:http://jsfiddle.net/2FwSY/

Es funktioniert gut, aber meine Idee ist ein bisschen fortgeschritten. Ich habe mich gefragt, ob es möglich ist, die Hervorhebung so zu ändern, dass beim Mouse-Over zum Knoten die Verknüpfungen dieses Knotens zu Nachbarknoten, Nachbarknoten und auch Verknüpfungen von diesem Nachbarknoten zu ihren Nachbarknoten hervorgehoben werden.

Genau, nach meinem Beispiel. Wenn du schwebstBNG , BNG, YHO, CEO und alleslinks between them wird hervorgehoben. Das Problem sind die kleinen blauen Knoten, die ich als "Verbindung" zwischen größeren Knoten verwende. Mein Highlight wird fürs Erste auf ihnen "abgeschnitten", weil es sich tatsächlich um Knoten handelt. Auch scheint es mir, dass da eine gebraucht würdeIF Anweisung, die sagen würde, ob der schwebende Knoten dieser kleine oder größere ist, weil ich möchte, dass das Licht auf diesem kleinen Verbindungsknoten so funktioniert, als ob es jetzt funktioniert.

Ich weiß nicht, wo ich anfangen soll, daher sind Vorschläge und Ratschläge willkommen ...

Das vollständige Skript sieht folgendermaßen aus:

var data = {"nodes":[
                        {"name":"YHO", "full_name":"Yahoo", "type":1, "slug": "www.yahoo.com", "entity":"company", "img_hrefD":"", "img_hrefL":""},
                        {"name":"GGL", "full_name":"Google", "type":2, "slug": "www.google.com", "entity":"company", "img_hrefD":"", "img_hrefL":""},
                        {"name":"BNG", "full_name":"Bing", "type":2, "slug": "www.bing.com", "entity":"company", "img_hrefD":"", "img_hrefL":""},
                        {"name":"YDX", "full_name":"Yandex", "type":2, "slug": "www.yandex.com", "entity":"company", "img_hrefD":"", "img_hrefL":""},

                        {"name":"Desc1", "type":4, "slug": "", "entity":"description"},
                        {"name":"Desc2", "type":4, "slug": "", "entity":"description"},
                        {"name":"Desc4", "type":4, "slug": "", "entity":"description"},

                        {"name":"CEO", "prefix":"Mr.", "fst_name":"Jim", "snd_name":"Bean", "type":3, "slug": "", "entity":"employee"},
                        {"name":"ATT", "prefix":"Ms.", "fst_name":"Jenna", "snd_name":"Jameson", "type":3, "slug": "", "entity":"employee"},
                        {"name":"CTO", "prefix":"Mr.", "fst_name":"Lucky", "snd_name":"Luke", "type":3, "slug": "", "entity":"employee"},
                        {"name":"CDO", "prefix":"Ms.", "fst_name":"Pamela", "snd_name":"Anderson", "type":3, "slug": "", "entity":"employee"},
                        {"name":"CEO", "prefix":"Mr.", "fst_name":"Nacho", "snd_name":"Vidal", "type":3, "slug": "", "entity":"employee"},

                        {"name":"Desc5", "type":4, "slug": "", "entity":"description"},
                    ], 
            "links":[
                        {"source":0,"target":4,"value":1,"distance":5},
                        {"source":0,"target":5,"value":1,"distance":5},
                        {"source":0,"target":6,"value":1,"distance":5},

                        {"source":1,"target":4,"value":1,"distance":5},
                        {"source":2,"target":5,"value":1,"distance":5},
                        {"source":3,"target":6,"value":1,"distance":5},

                        {"source":7,"target":3,"value":10,"distance":6},
                        {"source":8,"target":3,"value":10,"distance":6},
                        {"source":9,"target":1,"value":10,"distance":6},
                        {"source":10,"target":1,"value":10,"distance":6},

                        {"source":11,"target":12,"value":10,"distance":6},
                        {"source":12,"target":2,"value":10,"distance":6},
                        ]
               }    



    var w = 560,
        h = 500,
        radius = d3.scale.log().domain([0, 312000]).range(["10", "50"]);

    var vis = d3.select("body").append("svg:svg")
        .attr("width", w)
        .attr("height", h);

        //vis.append("defs").append("marker")
        //.attr("id", "arrowhead")
        //.attr("refX", 22 + 3) /*must be smarter way to calculate shift*/
        //.attr("refY", 2)
        //.attr("markerWidth", 6)
        //.attr("markerHeight", 4)
        //.attr("orient", "auto")
        //.append("path")
            //.attr("d", "M 0,0 V 4 L6,2 Z"); //this is actual shape for arrowhead

    //d3.json(data, function(json) {
        var force = self.force = d3.layout.force()
            .nodes(data.nodes)
            .links(data.links)
            .linkDistance(function(d) { return (d.distance*10); })
            //.friction(0.5)
            .charge(-250)
            .size([w, h])
            .start();



        var link = vis.selectAll("line.link")
            .data(data.links)
            .enter().append("svg:line")
            .attr("class", function (d) { return "link" + d.value +""; })
            .attr("x1", function(d) { return d.source.x; })
            .attr("y1", function(d) { return d.source.y; })
            .attr("x2", function(d) { return d.target.x; })
            .attr("y2", function(d) { return d.target.y; })
            .attr("marker-end", function(d) {
                                                if (d.value == 1) {return "url(#arrowhead)"}
                                                else    { return " " }
                                            ;});




        function openLink() {
            return function(d) {
                var url = "";
                if(d.slug != "") {
                    url = d.slug
                } //else if(d.type == 2) {
                    //url = "clients/" + d.slug
                //} else if(d.type == 3) {
                    //url = "agencies/" + d.slug
                //}
                window.open("//"+url)
            }
        }




        var node = vis.selectAll("g.node")
            .data(data.nodes)
          .enter().append("svg:g")
            .attr("class", "node")
            .call(force.drag);


        node.append("circle")
            .attr("class", function(d){ return "node type"+d.type})
            .attr("r",function(d){if(d.entity == "description"){ return 6 } else { return 18 }})
            //.on("mouseover", expandNode);
            //.style("fill", function(d) { return fill(d.type); })



        node.append("text")
            .attr("class", function(d){ return "nodetext title_"+d.name })
            .attr("dx", 0)
            .attr("dy", ".35em")
            .style("font-size","10px")
            .attr("text-anchor", "middle")
            .style("fill", "white")
            .text(function(d) { if (d.entity != "description"){return d.name} });



        node.on("mouseover", function (d) {
            if (d.entity == "company"){   
                d3.select(this).select('text')
                    .transition()
                    .duration(300)
                    .text(function(d){
                            return d.full_name;
                        })
                    .style("font-size","15px")

            }
            else if(d.entity == "employee"){
                var asdf = d3.select(this);
                asdf.select('text').remove();

                asdf.append("text")
                            .text(function(d){return d.prefix + ' ' + d.fst_name })
                            .attr("class","nodetext")
                            .attr("dx", 0)
                            .attr("dy", ".35em")
                            .style("font-size","5px")
                            .attr("text-anchor", "middle")
                            .style("fill", "white")
                            .transition()
                            .duration(300)
                            .style("font-size","12px");

                asdf.append("text").text(function(d){return d.snd_name })
                            .attr("class","nodetext")
                            .attr("transform","translate(0, 12)")
                            .attr("dx", 0)
                            .attr("dy", ".35em")
                            .style("font-size","5px")
                            .attr("text-anchor", "middle")
                            .style("fill", "white")
                            .transition()
                            .duration(300)
                            .style("font-size","12px");                                         
            }
            else {
                d3.select(this).select('text')
                    .transition()
                    .duration(300)
                    .style("font-size","15px")
            }

            if (d.entity == "company") {
                d3.select(this).select('image')
                    .attr("width", "90px")
                    .attr("x", "-46px")
                    .attr("y", "-36.5px")
                    .attr("xlink:href", function (d) {
                        return d.img_hrefL
                        });               
            }

            if (d.entity == "company") {

                d3.select(this).select('circle')
                                .transition()
                                .duration(300)
                                .attr("r",28)

            }
            else if (d.entity == "employee"){
                d3.select(this).select('circle')
                                .transition()
                                .duration(300)
                                .attr("r",32)
            }
        })


         node.on("mouseout", function (d) {
            if (d.entity == "company") {
                d3.select(this).select('text')
                    .transition()
                    .duration(300)
                    .text(function(d){return d.name;})
                    .style("font-size","10px")
                }
            else if(d.entity == "employee"){
                ///////////////////////////
                // CHANGE
                ///////////////////////////

                d3.select(this).selectAll('text').remove();

                //d3.select(this).select('text')
                d3.select(this).append('text')
                    .text(function(d){return d.name;})
                    .style("font-size","14px")  
                    .attr("dx", 0)
                    .attr("dy", ".35em")
                    .attr("text-anchor", "middle")
                    .style("fill", "white")
                    .attr("class","nodetext")
                    .transition()
                    .duration(300)
                    .style("font-size","10px")

            }
            else {
                d3.select(this).select('text')
                    .transition()
                    .duration(300)
                    .style("font-size","10px")
            }


             if (d.entity == "company") {
                d3.select(this).select('image')
                    .attr("width", "70px")
                    .attr("x", "-36px")
                    .attr("y", "-36px")
                    .attr("xlink:href", function (d) {
                    return d.img_hrefD
                });
            }

            if (d.entity == "company" || d.entity == "employee") {

                d3.select(this).select('circle')
                                .transition()
                                .duration(300)
                                .attr("r",18)
            }

        });

        node.on("mouseover", fade(.4,"red"))
            .on("mouseout", fade(1));

var linkedByIndex = {};
    data.links.forEach(function(d) {
        linkedByIndex[d.source.index + "," + d.target.index] = 1;
    });

    function isConnected(a, b) {
        return linkedByIndex[a.index + "," + b.index] || linkedByIndex[b.index + "," + a.index] || a.index == b.index;
    }

        force.on("tick", function() {
          link.attr("x1", function(d) { return d.source.x; })
              .attr("y1", function(d) { return d.source.y; })
              .attr("x2", function(d) { return d.target.x; })
              .attr("y2", function(d) { return d.target.y; });

          node.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
        });

        function fade(opacity,color) {
            return function(d) {

         node.style("stroke-opacity", function(o) {
            thisOpacity = isConnected(d, o) ? 1 : opacity;
            this.setAttribute('fill-opacity', thisOpacity);
            return thisOpacity;
        });

                link.style("stroke-opacity", function(o) {
                    return o.source === d || o.target === d ? 1 : opacity;
                })

                .style("stroke", function(o) {
                    return o.source === d || o.target === d ? color : "#000" ;
                });
            };

            }
    //});