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Javascript 如何在D3.js中添加箭头链接?_Javascript_Jquery_D3.js - Fatal编程技术网

Javascript 如何在D3.js中添加箭头链接?

Javascript 如何在D3.js中添加箭头链接?,javascript,jquery,d3.js,Javascript,Jquery,D3.js,我想在链接的一端放一个箭头。 我已管理链接,但无法绘制箭头。 这是我的代码,可以正常工作,但我上面提到的问题只是帮助我如何绘制箭头。谢谢 请记住,我希望箭头指向目标一侧 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="D3js_demo.WebForm1" %> <!DOCTYPE html> <html xmlns="http://www

我想在链接的一端放一个箭头。 我已管理链接,但无法绘制箭头。 这是我的代码,可以正常工作,但我上面提到的问题只是帮助我如何绘制箭头。谢谢

请记住,我希望箭头指向目标一侧

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="D3js_demo.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">
    <script type="text/javascript" src="http://d3js.org/d3.v2.min.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
    <title>Weighted Citation Graph</title>
     <style>

path.link {
    fill: #ccc;
    stroke: #333;
    stroke-width: 1.5px;
}   

circle {
    fill: #ccc;
    stroke: #333;
    stroke-width: 1.5px;
}

text {
    font: 10px sans-serif;
    pointer-events: none;
}

text.shadow {
    stroke: #fff;
    stroke-width: 3px;
    stroke-opacity: .8;
}

body {
    background-color: white;
    margin: 0px;
}

.graphContainer {
    text-shadow: -1px -1px 0 white, 1px -1px 0 white, -1px 1px 0 white, 1px 1px 0 white;
}

</style>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <script src="//d3js.org/d3.v3.min.js"></script>
<script>

    $(function () {
        var color = d3.scale.category20();
        var data = {
            "nodes": [
                { "id": 0, "name": "paper1", "citation": 5, "group": 1 },
                { "id": 1, "name": "paper2", "citation": 8, "group": 2 },
                { "id": 2, "name": "paper3", "citation": 12, "group": 3 },
                { "id": 3, "name": "paper4", "citation": 25, "group": 4 },
                { "id": 4, "name": "paper5", "citation": 15, "group": 5 },
                { "id": 5, "name": "paper6", "citation": 5, "group": 1 },
                { "id": 6, "name": "paper7", "citation": 8, "group": 2 },
                { "id": 7, "name": "paper8", "citation": 12, "group": 3 },
                { "id": 8, "name": "paper9", "citation": 25, "group": 4 },
                { "id": 9, "name": "paper10", "citation": 15, "group": 5 }
            ],
            "links": [
                { "source": 0, "target": 1, "name": "A-B-1", "value": 0 , "grouo": 1},
                { "source": 0, "target": 1, "name": "A-B-2", "value": 24, "grouo": 2 },
                { "source": 0, "target": 2, "name": "A-C-1", "value": 100, "grouo": 1 },
                { "source": 0, "target": 2, "name": "A-C-3", "value": 44, "grouo": 2 },
                { "source": 2, "target": 3, "name": "A-D-1", "value": 169, "grouo": 1 },
                { "source": 2, "target": 3, "name": "A-D-2", "value": 80, "grouo": 2 },
                { "source": 2, "target": 4, "name": "A-E-1", "value": 16, "grouo": 1 },
                { "source": 2, "target": 4, "name": "A-E-5", "value": 200, "grouo": 2 },
                { "source": 4, "target": 5, "name": "A-B-1", "value": 8, "grouo": 1 },
                { "source": 4, "target": 5, "name": "A-B-2", "value": 24, "grouo": 2 },
                { "source": 5, "target": 6, "name": "A-C-1", "value": 12, "grouo": 1 },
                { "source": 5, "target": 6, "name": "A-C-3", "value": 44, "grouo": 2 },
                { "source": 5, "target": 7, "name": "A-D-1", "value": 125, "grouo": 1 },
                { "source": 5, "target": 7, "name": "A-D-2", "value": 225, "grouo": 2 },
                { "source": 7, "target": 8, "name": "A-E-1", "value": 36, "grouo": 1 },
                { "source": 7, "target": 8, "name": "A-E-5", "value": 81, "grouo": 2 },
                { "source": 8, "target": 3, "name": "A-C-1", "value": 9, "grouo": 1 },
                { "source": 8, "target": 3, "name": "A-C-3", "value": 16, "grouo": 2 },
                { "source": 8, "target": 9, "name": "A-D-1", "value": 50, "grouo": 1 },
                { "source": 8, "target": 9, "name": "A-D-2", "value": 100, "grouo": 2 }
            ]
        };

        // used to store the number of links between two nodes. 
        // mLinkNum[data.links[i].source + "," + data.links[i].target] = data.links[i].linkindex;
        var mLinkNum = {};

        // sort links first
        sortLinks();

        // set up linkIndex and linkNumer, because it may possible multiple links share the same source and target node
        setLinkIndexAndNum();

        var w = 960,
            h = 500;

        var force = d3.layout.force()
                      .nodes(d3.values(data.nodes))
                      .links(data.links)
                      .size([w, h])
                      .linkDistance(200)
                      .charge(-1000)
                      .on("tick", tick)
                      .start();

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

        var path = svg.append("svg:g")
                  .selectAll("line")
                  .data(force.links())
                  .enter().append("svg:path")
                  .attr("class", "link")
                  .style("stroke-width", function (d) { return Math.sqrt(d.value)})
                  .style("stroke", function (d) { return color(d.grouo)});

        var circle = svg.append("svg:g")
                        .selectAll("circle")
                        .data(force.nodes())
                        .enter().append("svg:circle")
                        .attr("r", function (d) { return (d.citation); })
                        .style("fill", function (d) { return color(d.group); })
                        .call(force.drag);

        var text = svg.append("svg:g")
                      .selectAll("g")
                      .data(force.nodes())
                      .enter().append("svg:g");

        // A copy of the text with a thick white stroke for legibility.
        text.append("svg:text")
            .attr("x", 8)
            .attr("y", ".31em")
            .attr("class", "shadow")
            .text(function (d) { return d.name; });

        text.append("svg:text")
            .attr("x", 8)
            .attr("y", ".31em")
            .text(function (d) { return d.name; });

        // Use elliptical arc path segments to doubly-encode directionality.
        function tick() {
            path.attr("d", function (d) {
                var dx = d.target.x - d.source.x,
                    dy = d.target.y - d.source.y,
                    dr = Math.sqrt(dx * dx + dy * dy);
                // get the total link numbers between source and target node
                var lTotalLinkNum = mLinkNum[d.source.id + "," + d.target.id] || mLinkNum[d.target.id + "," + d.source.id];
                if (lTotalLinkNum > 1) {
                    // if there are multiple links between these two nodes, we need generate different dr for each path
                    dr = dr / (1 + (1 / lTotalLinkNum) * (d.linkindex - 1));
                }
                // generate svg path
                return "M" + d.source.x + "," + d.source.y +
                    "A" + dr + "," + dr + " 0 0 1," + d.target.x + "," + d.target.y +
                    "A" + dr + "," + dr + " 0 0 0," + d.source.x + "," + d.source.y;
            });

            // Add tooltip to the connection path
            path.append("svg:title")
                .text(function (d, i) { return d.name; });

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

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

        // sort the links by source, then target
        function sortLinks() {
            data.links.sort(function (a, b) {
                if (a.source > b.source) {
                    return 1;
                }
                else if (a.source < b.source) {
                    return -1;
                }
                else {
                    if (a.target > b.target) {
                        return 1;
                    }
                    if (a.target < b.target) {
                        return -1;
                    }
                    else {
                        return 0;
                    }
                }
            });
        }

        //any links with duplicate source and target get an incremented 'linknum'
        function setLinkIndexAndNum() {
            for (var i = 0; i < data.links.length; i++) {
                if (i != 0 &&
                    data.links[i].source == data.links[i - 1].source &&
                    data.links[i].target == data.links[i - 1].target) {
                    data.links[i].linkindex = data.links[i - 1].linkindex + 1;
                }
                else {
                    data.links[i].linkindex = 1;
                }
                // save the total number of links between two nodes
                if (mLinkNum[data.links[i].target + "," + data.links[i].source] !== undefined) {
                    mLinkNum[data.links[i].target + "," + data.links[i].source] = data.links[i].linkindex;
                }
                else {
                    mLinkNum[data.links[i].source + "," + data.links[i].target] = data.links[i].linkindex;
                }
            }
        }
    });

</script>

    </div>
        <div id="graphContainer" class="graphContainer"></div>
    </form>
</body>
</html>

加权引文图
路径链接{
填充:#ccc;
冲程:#333;
笔划宽度:1.5px;
}   
圈{
填充:#ccc;
冲程:#333;
笔划宽度:1.5px;
}
正文{
字体:10px无衬线;
指针事件:无;
}
text.shadow{
冲程:#fff;
笔画宽度:3px;
笔画不透明度:.8;
}
身体{
背景色:白色;
边际:0px;
}
.图形容器{
文本阴影:-1px-1px 0白色,1px-1px 0白色,-1px 1px 0白色,1px 1px 0白色;
}
$(函数(){
var color=d3.scale.category20();
风险值数据={
“节点”:[
{“id”:0,“name”:“paper1”,“引文”:5,“group”:1},
{“id”:1,“name”:“paper2”,“引文”:8,“group”:2},
{“id”:2,“name”:“paper3”,“引文”:12,“group”:3},
{“id”:3,“name”:“paper4”,“引文”:25,“group”:4},
{“id”:4,“name”:“paper5”,“引文”:15,“group”:5},
{“id”:5,“name”:“paper6”,“引文”:5,“group”:1},
{“id”:6,“name”:“paper7”,“引文”:8,“group”:2},
{“id”:7,“name”:“paper8”,“引文”:12,“group”:3},
{“id”:8,“name”:“paper9”,“引文”:25,“group”:4},
{“id”:9,“name”:“paper10”,“引文”:15,“group”:5}
],
“链接”:[
{“源”:0,“目标”:1,“名称”:“A-B-1”,“值”:0,“群”:1},
{“源”:0,“目标”:1,“名称”:“A-B-2”,“值”:24,“群”:2},
{“源”:0,“目标”:2,“名称”:“A-C-1”,“值”:100,“群”:1},
{“源”:0,“目标”:2,“名称”:“A-C-3”,“值”:44,“群”:2},
{“源”:2,“目标”:3,“名称”:“A-D-1”,“值”:169,“群”:1},
{“源”:2,“目标”:3,“名称”:“A-D-2”,“值”:80,“群”:2},
{“源”:2,“目标”:4,“名称”:“A-E-1”,“值”:16,“群”:1},
{“源”:2,“目标”:4,“名称”:“A-E-5”,“值”:200,“群”:2},
{“源”:4,“目标”:5,“名称”:“A-B-1”,“值”:8,“群”:1},
{“源”:4,“目标”:5,“名称”:“A-B-2”,“值”:24,“群”:2},
{“源”:5,“目标”:6,“名称”:“A-C-1”,“值”:12,“群”:1},
{“来源”:5,“目标”:6,“名称”:“A-C-3”,“价值”:44,“集团”:2},
{“源”:5,“目标”:7,“名称”:“A-D-1”,“值”:125,“群”:1},
{“源”:5,“目标”:7,“名称”:“A-D-2”,“值”:225,“群”:2},
{“源”:7,“目标”:8,“名称”:“A-E-1”,“值”:36,“群”:1},
{“源”:7,“目标”:8,“名称”:“A-E-5”,“值”:81,“群”:2},
{“源”:8,“目标”:3,“名称”:“A-C-1”,“值”:9,“群”:1},
{“源”:8,“目标”:3,“名称”:“A-C-3”,“值”:16,“群”:2},
{“源”:8,“目标”:9,“名称”:“A-D-1”,“值”:50,“群”:1},
{“源”:8,“目标”:9,“名称”:“A-D-2”,“值”:100,“群”:2}
]
};
//用于存储两个节点之间的链接数。
//mLinkNum[data.links[i].source+,“+data.links[i].target]=data.links[i].linkindex;
var mLinkNum={};
//首先对链接排序
sortLinks();
//设置linkIndex和linkNumer,因为可能有多个链接共享同一个源节点和目标节点
setLinkIndexAndNum();
var w=960,
h=500;
var-force=d3.layout.force()
.节点(d3.值(数据.节点))
.links(data.links)
.尺寸([w,h])
.linkDistance(200)
。收费(-1000)
.on(“滴答”,滴答)
.start();
var svg=d3.选择(“.graphContainer”).追加(“svg:svg”)
.attr(“宽度”,w)
.attr(“高度”,h);
var path=svg.append(“svg:g”)
.selectAll(“行”)
.data(force.links())
.enter().append(“svg:path”)
.attr(“类”、“链接”)
.style(“笔划宽度”,函数(d){return Math.sqrt(d.value)})
.style(“笔划”,函数(d){返回颜色(d.grouo)});
var circle=svg.append(“svg:g”)
.selectAll(“圆圈”)
.data(force.nodes())
.enter().append(“svg:circle”)
.attr(“r”,函数(d){return(d.引文);})
.style(“fill”,函数(d){返回颜色(d.group);})
.呼叫(强制拖动);
var text=svg.append(“svg:g”)
.全选(“g”)
.data(force.nodes())
.enter().append(“svg:g”);
//文本的副本,带有粗白色笔划以便于阅读。
text.append(“svg:text”)
.attr(“x”,8)
.attr(“y”,“.31em”)
.attr(“类”、“阴影”)
.text(函数(d){返回d.name;});
text.append(“svg:text”)
.attr(“x”,8)
.attr(“y”,“.31em”)
.text(函数(d){返回d.name;});
//使用椭圆弧路径段对方向性进行双重编码。
函数tick(){
attr(“d”,函数(d){
变量dx=d.target.x-d.source.x,
dy=d.target.y-d.source.y,
dr=Math.sqrt(dx*dx+dy*d
svg.append("svg:defs").selectAll("marker")
    .data(["end"])      // Different link/path types can be defined here
  .enter().append("svg:marker")    // This section adds in the arrows
    .attr("id", String)
    .attr("viewBox", "0 -5 10 10")
    .attr("refX", 15)
    .attr("refY", 0.5)
    .attr("markerWidth", 2)
    .attr("markerHeight", 2)
    .attr("orient", "auto")
  .append("svg:path")
    .attr("d", "M0,-5L10,0L0,5");
.attr("marker-end", "url(#end)");