legend-尾部跟随图例

组件

legend-尾部跟随图例

使用尾部跟随Legend,legend自动跟随最后一个数据点在画布上的位置，适用于折线图和堆叠面积图。并展示了尾部跟随Legend自定义交互方法。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,height=device-height">
    <title>legend-尾部跟随图例</title>
    <style>::-webkit-scrollbar{display:none;}html,body{overflow:hidden;height:100%;margin:0;}</style>
</head>
<body>
<div id="mountNode"></div>
<script>/*Fixing iframe window.innerHeight 0 issue in Safari*/document.body.clientHeight;</script>
<script src="https://gw.alipayobjects.com/os/antv/pkg/_antv.g2-3.5.1/dist/g2.min.js"></script>
<script src="https://gw.alipayobjects.com/os/antv/assets/lib/jquery-3.2.1.min.js"></script>
<script src="https://gw.alipayobjects.com/os/antv/pkg/_antv.data-set-0.10.1/dist/data-set.min.js"></script>
<script>
  $.getJSON('https://gw.alipayobjects.com/os/antvdemo/assets/data/fertility2.json', function(data) {
    var dv = new DataSet.View().source(data).transform({
      type: 'aggregate',
      fields: ['value', 'value'],
      operations: ['min', 'max'],
      as: ['min', 'max'],
      groupBy: ['country'],
      orderBy: ['year']
    }).rows;

data = new DataSet.View().source(data).transform({
      type: 'sort-by',
      field: 'year',
      orderBy: 'ASC'
    });
    var valueMap = {};
    var chart = new G2.Chart({
      container: 'mountNode',
      forceFit: true,
      height: window.innerHeight,
      padding: [10, 200, 50, 50]
    });
    chart.source(data);
    chart.legend({
      attachLast: true
    });
    chart.line().position('year*value').color('country').size('country', function(country) {
      if (country === 'China') return 5;
      return 2;
    }).label('country*value*year', function(country, value, year) {
      var result = null;
      for (var i = 0; i < dv.length; i++) {
        if (dv[i].country === country) {
          if (dv[i].min === value && !valueMap[country + 'min']) {
            valueMap[country + 'min'] = year;
            result = value;
            break;
          }

if (dv[i].max === value && !valueMap[country + 'max']) {
            valueMap[country + 'max'] = year;
            result = value;
            break;
          }
        }
      }
      return result;
    }, {
      labelLine: false,
      offset: 10,
      textStyle: {
        stroke: '#fff',
        lineWidth: 2
      }
    }).style({
      lineCap: 'round'
    });
    chart.point().position('year*value').color('country').style({
      lineWidth: 2
    }).size('country*value*year', function(country, value, year) {
      if (valueMap[country + 'min'] === year || valueMap[country + 'max'] === year) {
        return 3;
      }
      return 0;
    });
    chart.render();
  });
</script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,height=device-height">
    <title>legend-尾部跟随图例</title>
    <style>::-webkit-scrollbar{display:none;}html,body{overflow:hidden;height:100%;margin:0;}</style>
</head>
<body style="background: #1f1f1f;">
<div id="mountNode"></div>
<script>/*Fixing iframe window.innerHeight 0 issue in Safari*/document.body.clientHeight;</script>
<script src="https://gw.alipayobjects.com/os/antv/pkg/_antv.g2-3.5.1/dist/g2.min.js"></script>
<script src="https://gw.alipayobjects.com/os/antv/assets/lib/jquery-3.2.1.min.js"></script>
<script src="https://gw.alipayobjects.com/os/antv/pkg/_antv.data-set-0.10.1/dist/data-set.min.js"></script>
<script>G2.Global.setTheme('dark');</script>
<script>
  $.getJSON('https://gw.alipayobjects.com/os/antvdemo/assets/data/fertility2.json', function(data) {
    var dv = new DataSet.View().source(data).transform({
      type: 'aggregate',
      fields: ['value', 'value'],
      operations: ['min', 'max'],
      as: ['min', 'max'],
      groupBy: ['country'],
      orderBy: ['year']
    }).rows;

图表简介

使用尾部跟随Legend,legend自动跟随最后一个数据点在画布上的位置，适用于折线图和堆叠面积图。并展示了尾部跟随Legend自定义交互方法。

图表用法

数据来源：Tobacco smoking prevalence trends among people aged 15+ years from 2000 until 2025 (WHO)

折线图

条形图

柱状图

饼图

点图

面积图

箱形图

烛形图

热力图

仪表盘

漏斗图

地图

雷达图

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关系图

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图表用法

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