使用 d3-tip 向 d3 条形图添加工具提示

深藏阁楼爱情的钟 2023-10-02 13:54 38阅读 0赞

如何在d3 的[简单条形图示例中][Link 1]使用[d3-tip][]。

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAYWxsd2F5Mg_size_20_color_FFFFFF_t_70_g_se_x_16][]

### index.html\# ###

<!DOCTYPE html>
    <meta charset="utf-8">
    <style>
    
    body {
      font: 10px sans-serif;
    }
    
    .axis path,
    .axis line {
      fill: none;
      stroke: #000;
      shape-rendering: crispEdges;
    }
    
    .bar {
      fill: orange;
    }
    
    .bar:hover {
      fill: orangered ;
    }
    
    .x.axis path {
      display: none;
    }
    
    .d3-tip {
      line-height: 1;
      font-weight: bold;
      padding: 12px;
      background: rgba(0, 0, 0, 0.8);
      color: #fff;
      border-radius: 2px;
    }
    
    /* Creates a small triangle extender for the tooltip */
    .d3-tip:after {
      box-sizing: border-box;
      display: inline;
      font-size: 10px;
      width: 100%;
      line-height: 1;
      color: rgba(0, 0, 0, 0.8);
      content: "\25BC";
      position: absolute;
      text-align: center;
    }
    
    /* Style northward tooltips differently */
    .d3-tip.n:after {
      margin: -1px 0 0 0;
      top: 100%;
      left: 0;
    }
    </style>
    <body>
    <script src="http://d3js.org/d3.v3.min.js"></script>
    <script src="http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script>
    <script>
    
    var margin = {
          top: 40, right: 20, bottom: 30, left: 40},
        width = 960 - margin.left - margin.right,
        height = 500 - margin.top - margin.bottom;
    
    var formatPercent = d3.format(".0%");
    
    var x = d3.scale.ordinal()
        .rangeRoundBands([0, width], .1);
    
    var y = d3.scale.linear()
        .range([height, 0]);
    
    var xAxis = d3.svg.axis()
        .scale(x)
        .orient("bottom");
    
    var yAxis = d3.svg.axis()
        .scale(y)
        .orient("left")
        .tickFormat(formatPercent);
    
    var tip = d3.tip()
      .attr('class', 'd3-tip')
      .offset([-10, 0])
      .html(function(d) {
        return "<strong>Frequency:</strong> <span style='color:red'>" + d.frequency + "</span>";
      })
    
    var svg = d3.select("body").append("svg")
        .attr("width", width + margin.left + margin.right)
        .attr("height", height + margin.top + margin.bottom)
      .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
    
    svg.call(tip);
    
    d3.tsv("data.tsv", type, function(error, data) {
      x.domain(data.map(function(d) { return d.letter; }));
      y.domain([0, d3.max(data, function(d) { return d.frequency; })]);
    
      svg.append("g")
          .attr("class", "x axis")
          .attr("transform", "translate(0," + height + ")")
          .call(xAxis);
    
      svg.append("g")
          .attr("class", "y axis")
          .call(yAxis)
        .append("text")
          .attr("transform", "rotate(-90)")
          .attr("y", 6)
          .attr("dy", ".71em")
          .style("text-anchor", "end")
          .text("Frequency");
    
      svg.selectAll(".bar")
          .data(data)
        .enter().append("rect")
          .attr("class", "bar")
          .attr("x", function(d) { return x(d.letter); })
          .attr("width", x.rangeBand())
          .attr("y", function(d) { return y(d.frequency); })
          .attr("height", function(d) { return height - y(d.frequency); })
          .on('mouseover', tip.show)
          .on('mouseout', tip.hide)
    
    });
    
    function type(d) {
      d.frequency = +d.frequency;
      return d;
    }
    
    </script>

### data.tsv\# ###

letter	frequency
    A	.08167
    B	.01492
    C	.02780
    D	.04253
    E	.12702
    F	.02288
    G	.02022
    H	.06094
    I	.06973
    J	.00153
    K	.00747
    L	.04025
    M	.02517
    N	.06749
    O	.07507
    P	.01929
    Q	.00098
    R	.05987
    S	.06333
    T	.09056
    U	.02758
    V	.01037
    W	.02465
    X	.00150
    Y	.01971
    Z	.00074

[Link 1]: http://bl.ocks.org/mbostock/3885304
[d3-tip]: https://github.com/caged/d3-tip
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAYWxsd2F5Mg_size_20_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/cfa5e93a87bd48cb892df5a97bbbdbeb.png?x-oss-process=image/watermark,type_ZHJvaWRzYW5zZmFsbGJhY2s,shadow_50,text_Q1NETiBAYWxsd2F5Mg==,size_20,color_FFFFFF,t_70,g_se,x_16