D3.js实现节点折叠+闪烁+叶节点形状改变的demo

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>

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转载自blog.csdn.net/joker_fei/article/details/74910281