在鼠标悬停上突出显示使用 D3.js 绘制的椭圆弧并显示工具提示

Question

如何使用 d3.js 在鼠标悬停时突出显示绘制的椭圆弧并显示工具提示？

Answer 1

使用 d3-tip 将工具提示添加到 d3 条形图

Index.html:

    Using d3-tip to add tooltips to a d3 bar chart.
<!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: "BC";
  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

字母频率 .08167 B.01492 C.02780 D.04253 E.12702 F.02288 G.02022 H .06094 我.06973 J.00153 K.00747 大号.04025 M.02517 N.06749 O.07507 P.01929 问.00098 R.05987 S.06333 T.09056 U .02758 五.01037 W.02465 X.00150 Y.01971 Z .00074

参考：

Answer 2

<!DOCTYPE html>
<meta charset="utf-8">
<html>
<head>
    <style>
        body { font: 10px sans-serif; }

        .d3-tip {
            background: rgba(0, 0, 0, 0.8);
            border-radius: 2px;
            color: #fff;
            font-weight: bold;
            line-height: 1;
            padding: 12px;
        }
    </style>
</head>
<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 w = window.innerWidth,
        h = window.innerHeight,
        margin = { top: 40, right: 20, bottom: 20, left: 40 };

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

    var dataset = [
        { toolTip: "one", d: "M 50 200 a 100 50 0 1 1 250 50" },
        { toolTip: "two", d: "M 400 100 a 100 50 30 1 1 250 50" },
        { toolTip: "three", d: "M 400 300 a 100 50 45 1 1 250 50" },
        { toolTip: "four", d: "M 750 200 a 100 50 135 1 1 250 50" }
    ];

    var tip = d3.tip()
        .attr('class', 'd3-tip')
        .offset([-10, 0])
        .html(function(d) {
            return "<strong>Elipse:</strong> <span style='color:red'>" + d.toolTip + "</span>";
        });

    svg.selectAll("g")
        .data(dataset)
        .enter()
        .append("g")
        .attr("stroke-width", 3)
        .attr("stroke", "black")
        .attr("fill", "none")
        .on('mouseover', tip.show)
        .on('mouseout', tip.hide)
        .append("path")
        .attr("d", function(d) { return d.d })
        .on('mouseover', highLight)
        .on('mouseout', unHighLight);

        svg.call(tip);

    function highLight(){
       var foo = d3.select(this);
       foo.attr("stroke","red");
   }

    function unHighLight(){
        var foo = d3.select(this);
        foo.attr("stroke","black");
    }

</script>
</body>
</html>

view block here

在鼠标悬停上突出显示使用 D3.js 绘制的椭圆弧并显示工具提示

Highlight elliptical arc drawn using D3.js on Mouseover and display tooltip

javascript

tooltip

tipsy

d3.js