D3.js实现节点折叠+闪烁+叶节点形状改变的demo

来源:互联网 发布:ios软件开发工程师招聘 编辑:程序博客网 时间:2024/05/16 04:54

这个demo主要实现的功能是D3树图节点折叠功能+闪烁+叶节点形状改变功能:

其中,D3.js树图节点的形状已经画好供用户使用的有以下几种:

• circle - a circle.
• cross - a Greek cross or plus sign.
• diamond - a rhombus.
• square - an axis-aligned square.
• triangle-down - a downward-pointing equilateral triangle.
• triangle-up - an upward-pointing equilateral triangle.


效果图(带颜色节点有闪烁功能):

这里写图片描述
HTML代码:

<!DOCTYPE html><html lang="en">  <head>    <meta charset="utf-8">    <title>Tree Example</title>    <style>    .node {        cursor: pointer;    }    .node circle {        stroke: '#f0f';        stroke-width: 4px;    }    .node text {      font: 12px sans-serif;    }    .link {      fill: none;      stroke: #ccc;      stroke-width: 2px;    }  .fill_normal {    fill: green;  }  .bling{ animation: alarm 0.4s  ease-in  infinite ; fill:yellow; font-weight: bold;}  @keyframes alarm {      0%{ fill:#FF9966;}      50%{ fill:#FF3333;}      100%{ fill:#FF9966;}  }    </style>  </head>  <body><!-- load the d3.js library --><script src="http://d3js.org/d3.v3.min.js"></script><script>var treeData = [  {    "name": "Top Level",    "parent": "null",    "value": 10,    "children": [      {        "name": "Level 2: A",        "parent": "Top Level",        "value": 10,        "children": [          {            "name": "Son of A",            "parent": "Level 2: A",            "value": 5          },          {            "name": "Daughter of A",            "parent": "Level 2: A",            "value": 5          },        ]      },      {        "name": "Level 2: B",        "parent": "Top Level",        "value": 5      },      {        "name": "Level 2: C",        "parent": "Top Level",        "value": 5      },    ]  }];// ************** Generate the tree diagram  *****************//定义树图的全局属性(宽高)var margin = {top: 20, right: 120, bottom: 20, left: 120},    width = 960 - margin.right - margin.left,    height = 500 - margin.top - margin.bottom;var i = 0,    duration = 750,//过渡延迟时间    root;var tree = d3.layout.tree()//创建一个树布局    .size([height, width]);var diagonal = d3.svg.diagonal()    .projection(function(d) { return [d.y, d.x]; });//创建新的斜线生成器//声明与定义画布属性var svg = d3.select("body").append("svg")    .attr("width", width + margin.right + margin.left)    .attr("height", height + margin.top + margin.bottom)  .append("g")    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");root = treeData[0];//treeData为上边定义的节点属性root.x0 = height / 2;root.y0 = 0;update(root);d3.select(self.frameElement).style("height", "500px");function update(source) {  // Compute the new tree layout.计算新树图的布局  var nodes = tree.nodes(root).reverse(),      links = tree.links(nodes);  // Normalize for fixed-depth.设置y坐标点,每层占180px  nodes.forEach(function(d) { d.y = d.depth * 180; });  // Update the nodes…每个node对应一个group  var node = svg.selectAll("g.node")      .data(nodes, function(d) { return d.id || (d.id = ++i); });//data():绑定一个数组到选择集上,数组的各项值分别与选择集的各元素绑定  // Enter any new nodes at the parent's previous position.新增节点数据集,设置位置  var nodeEnter = node.enter().append("g")  //在 svg 中添加一个g,g是 svg 中的一个属性,是 group 的意思,它表示一组什么东西,如一组 lines , rects ,circles 其实坐标轴就是由这些东西构成的。      .attr("class", "node") //attr设置html属性,style设置css属性      .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })      .on("click", click);  //添加连接点---此处设置的是圆圈过渡时候的效果(颜色)  // nodeEnter.append("circle")    //   .attr("r", 1e-6);//d 代表数据,也就是与某元素绑定的数据。  nodeEnter.append("path")    .style("stroke-width", "2px")    .style("stroke", "#4682b4")    .style("fill", "white")    .attr("d", d3.svg.symbol()                 .size(function(d){ if                    (d.value <= 9) { return "400"; } else if                    (d.value >= 9) { return "400";}                  })                 .type(function(d) { if                    (d.value <= 9) { return "triangle-up"; } else if                    (d.value >= 9) { return "circle";}                  }))    .attr('class',function(d){      if(d.value <= 9 ){        return 'bling';      }else{        return 'fill_normal';      }    });  //添加标签  nodeEnter.append("text")      .attr("x", function(d) { return d.children || d._children ? -13 : 13; })      .attr("dy", ".35em")      .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })      .text(function(d) { return d.name; })      .style("fill-opacity", 1e-6);  // Transition nodes to their new position.将节点过渡到一个新的位置-----主要是针对节点过渡过程中的过渡效果  //node就是保留的数据集,为原来数据的图形添加过渡动画。首先是整个组的位置  var nodeUpdate = node.transition()  //开始一个动画过渡      .duration(duration)  //过渡延迟时间,此处主要设置的是圆圈节点随斜线的过渡延迟      .attr("r", 10)    .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });  //更新连接点的填充色  // nodeUpdate.select("circle")  // .attr("r", 10)  // .attr('class',function(d){  //   if(d.value <= 9){  //     return 'bling';  //   }else{  //     return 'fill_normal';  //   }  // });  nodeUpdate.select("path")    .style("stroke-width", "2px")    .style("stroke", "#4682b4")    .style("fill", "white")    .attr("d", d3.svg.symbol()                 .size(function(d){ if                    (d.value <= 9) { return "400"; } else if                    (d.value >= 9) { return "400";}                  })                 .type(function(d) { if                    (d.value <= 9) { return "triangle-up"; } else if                    (d.value >= 9) { return "circle";}                  }))    .attr('class',function(d){      if(d.value <= 9 ){        return 'bling';      }else{        return 'fill_normal';      }    });  nodeUpdate.select("text")      .style("fill-opacity", 1);  // Transition exiting nodes to the parent's new position.过渡现有的节点到父母的新位置。  //最后处理消失的数据,添加消失动画  var nodeExit = node.exit().transition()      .duration(duration)      .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })      .remove();  nodeExit.select("circle")      .attr("r", 1e-6);  nodeExit.select("text")      .style("fill-opacity", 1e-6);  // Update the links…线操作相关  //再处理连线集合  var link = svg.selectAll("path.link")      .data(links, function(d) { return d.target.id; });  // Enter any new links at the parent's previous position.  //添加新的连线  link.enter().insert("path", "g")      .attr("class", "link")      .attr("d", function(d) {        var o = {x: source.x0, y: source.y0};        return diagonal({source: o, target: o});  //diagonal - 生成一个二维贝塞尔连接器, 用于节点连接图.      })    .style("stroke",function(d){      //d包含当前的属性console.log(d)      return '#ccc';    });  // Transition links to their new position.将斜线过渡到新的位置  //保留的连线添加过渡动画  link.transition()      .duration(duration)      .attr("d", diagonal);  // Transition exiting nodes to the parent's new position.过渡现有的斜线到父母的新位置。  //消失的连线添加过渡动画  link.exit().transition()      .duration(duration)      .attr("d", function(d) {        var o = {x: source.x, y: source.y};        return diagonal({source: o, target: o});      })      .remove();  // Stash the old positions for transition.将旧的斜线过渡效果隐藏  nodes.forEach(function(d) {    d.x0 = d.x;    d.y0 = d.y;  });}//定义一个将某节点折叠的函数// Toggle children on click.切换子节点事件function click(d) {  if (d.children) {    d._children = d.children;    d.children = null;  } else {    d.children = d._children;    d._children = null;  }  update(d);}</script>  </body></html>