如何使 D3 强制布局中的标签和节点可单击以导航到 URL？

我正在使用 D3 使用基于力的布局，并且想知道当我单击节点或标签时是否可能会自动转到存储在该节点/标签中的 url？如果是的话，我怎样才能实现这一目标？

这就是图表的实际外观（标签指示 URL 本身）

我正在分享我用来生成 D3 图的 JavaScript 代码。在代码中，我当前使用虚拟数据，这些数据实际上将被 URL 替换。

document.addEventListener('DOMContentLoaded', function () {
    drawVisual();
});

function drawVisual()
{
    //document.getElementById('myMSG').innerHTML = "last name"+localStorage.lastname;
    /*var getArr = [];
    getArr = JSON.parse(localStorage.getItem('storeArray'));
    document.getElementById('myMSG').innerHTML = getArr[1].parentURL;*/


    //var w = 1024, h = 768;

    var w=window.innerWidth
    || document.documentElement.clientWidth
    || document.body.clientWidth;

    var h=window.innerHeight
    || document.documentElement.clientHeight
    || document.body.clientHeight;
    //var w = 1024, h = 768;

    //var vis = d3.select("#tab_5_contents").append("svg:svg").attr("width", w).attr("height", h);
    var vis = d3.select("#forcedLayoutGraph").append("svg:svg").attr("width", w).attr("height", h);

            var QueuedORG = [];
            //QueuedORG = JSON.parse(localStorage.getItem('storeArray'));
            QueuedORG.push({url: "Root", parentURL: "Root", used:0});
            QueuedORG.push({url: "a", parentURL: "Root", used:0});
            QueuedORG.push({url: "b", parentURL: "Root", used:0});
            QueuedORG.push({url: "c", parentURL: "Root", used:0});
            QueuedORG.push({url: "d", parentURL: "Root", used:0});
            QueuedORG.push({url: "e", parentURL: "a", used:0});
            QueuedORG.push({url: "f", parentURL: "a", used:0});
            QueuedORG.push({url: "g", parentURL: "a", used:0});
            QueuedORG.push({url: "h", parentURL: "a", used:0});
            QueuedORG.push({url: "p", parentURL: "b", used:0});
            QueuedORG.push({url: "q", parentURL: "b", used:0});
            QueuedORG.push({url: "r", parentURL: "b", used:0});
            QueuedORG.push({url: "x", parentURL: "c", used:0});
            QueuedORG.push({url: "y", parentURL: "x", used:0});
            QueuedORG.push({url: "y", parentURL: "c", used:0});
            QueuedORG.push({url: "x", parentURL: "a"});
            QueuedORG.push({url: "y", parentURL: "b"});


            var nodes = [];

            var labelAnchors = [];
            var labelAnchorLinks = [];
            var links = [];

            for(var i = 0; i < QueuedORG.length; i++) 
            {
                var nodeExists = 0;

                //check to see if a node for the current url has already been created. If yes, do not create a new node
                for(var j = 0; j < nodes.length; j++)  
                {
                    if(QueuedORG[i].url == nodes[j].label)
                        nodeExists = 1;

                }

                if (nodeExists == 0)
                {
                    var urlLabel = QueuedORG[i].url;
                    //remove 'http://' part
                    /*urlLabel = urlLabel.split("http://")[1];
                    if(urlLabel.match("www"))
                    urlLabel = urlLabel.split("www.")[1];
                    var rest = urlLabel.split("\.")[1];
                    urlLabel = urlLabel.split("\.")[0];*/

                    var node = {
                        label : QueuedORG[i].url,
                        category : QueuedORG[i].category
                    };
                    nodes.push(node);
                    labelAnchors.push({
                        node : node
                    });
                    labelAnchors.push({
                        node : node
                    });
                }
            };

            for(var i=0;i<nodes.length; i++)
            {
                console.log("node i:"+i+nodes[i]+"\n");
                console.log("labelAnchor i:"+i+labelAnchors[i]+"\n");
            }

            //To create links for connecting nodes
            for(var i = 0; i < QueuedORG.length; i++) 
            {
                var srcIndx = 0, tgtIndx = 0;
                for(var j = 0; j < nodes.length; j++)
                {
                    if( QueuedORG[i].url == nodes[j].label ) //to find the node number for the current url
                    {
                        srcIndx = j;
                    }

                    if( QueuedORG[i].parentURL == nodes[j].label ) //to find the node number for the parent url
                    {
                        tgtIndx = j;
                    }
                }
                //console.log("src:"+srcIndx+" tgt:"+tgtIndx);

                //connecting the current url's node to the parent url's node
                links.push({
                    source : srcIndx,
                    target : tgtIndx,
                    weight : 1,
                });

                labelAnchorLinks.push({
                    source : srcIndx * 2,
                    target : srcIndx * 2 + 1,
                    weight : 1
                });
            };

            var force = d3.layout.force().size([w, h]).nodes(nodes).links(links).gravity(1).charge(-10000).linkStrength(function(x) {
                return x.weight * 10                                            // charge is for inter-node repel, link distance is node-node distance 
            });
            force.linkDistance(function(d) {
                return d.weight * 100;
            });

            force.start();

            var force2 = d3.layout.force().nodes(labelAnchors).links(labelAnchorLinks).gravity(0).linkStrength(10).charge(-500).size([w, h]);   //charge is for inter-label repel, link distance is node-label distance
            force2.linkDistance(function(d) {
                return d.weight * 10;
            });

            force2.start();

            var link = vis.selectAll("line.link").data(links).enter().append("svg:line").attr("class", "link").style("stroke", "#CCC");

            var colors = {"1": "black", "2": "blue", "3": "red"};           // 1=root node 2=blog nodes 3=.org nodes
            var shape = {"1": "diamond", "2": "cross", "3": "circle"};

            var node = vis.selectAll("g.node").data(force.nodes()).enter().append("path").attr("class", "node").call(force.drag);
        //node.append("circle").attr("r", 5).style("stroke", "#FFF").style("stroke-width", 3).attr("class", function(d) {return "node category"+d.category});

            node.attr("d", d3.svg.symbol().type(function(d) {return shape[d.category];})).style("stroke", "#FFF").style("fill", function(d){ return colors[d.category];});

            var anchorLink = vis.selectAll("line.anchorLink").data(labelAnchorLinks)//.enter().append("svg:line").attr("class", "anchorLink").style("stroke", "#999");

            var anchorNode = vis.selectAll("g.anchorNode").data(force2.nodes()).enter().append("svg:g").attr("class", "anchorNode");
            anchorNode.append("svg:circle").attr("r", 0).style("fill", "#FFF");
            anchorNode.append("svg:text").text(function(d, i) {
                return i % 2 == 0 ? "" : d.node.label
            }).style("fill", "#555").style("font-family", "Arial").style("font-size", 12);

            var updateLink = function() {
                this.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;
                });
            }

            var updateNode = function() {
                this.attr("transform", function(d) {
                    return "translate(" + d.x + "," + d.y + ")";
                });

            }

            force.on("tick", function() {

                force2.start();

                node.call(updateNode);

                anchorNode.each(function(d, i) {
                    if(i % 2 == 0) {
                        d.x = d.node.x;
                        d.y = d.node.y;
                    } else {
                        var b = this.childNodes[1].getBBox();

                        var diffX = d.x - d.node.x;
                        var diffY = d.y - d.node.y;

                        var dist = Math.sqrt(diffX * diffX + diffY * diffY);

                        var shiftX = b.width * (diffX - dist) / (dist * 2);
                        shiftX = Math.max(-b.width, Math.min(0, shiftX));
                        var shiftY = 5;
                        this.childNodes[1].setAttribute("transform", "translate(" + shiftX + "," + shiftY + ")");
                    }
                });

                anchorNode.call(updateNode);

        link.call(updateLink);
        anchorLink.call(updateLink);

    });
}

一般来说，您可以使用以下命令向 D3.js 中的 SVG 元素添加点击事件

.on('click', function(d, i) {
  window.location.href = d.url;
})

d是数据对象并且i位于集合内 d 的索引中。

只需将该单击处理程序添加到您的文本节点以及您的节点（路径）节点，就像这个小提琴一样http://jsfiddle.net/jNyrf/