Legend Filter

[pearmini]

interaction.legendFilter

通过 legend 去对数据进行过滤。

开始

import { Chart } from '@antv/g2';

const data = [
  { month: 'Jan', city: 'Tokyo', temperature: 7 },
  { month: 'Jan', city: 'London', temperature: 3.9 },
  { month: 'Feb', city: 'Tokyo', temperature: 6.9 },
  { month: 'Feb', city: 'London', temperature: 4.2 },
  { month: 'Mar', city: 'Tokyo', temperature: 9.5 },
  { month: 'Mar', city: 'London', temperature: 5.7 },
  { month: 'Apr', city: 'Tokyo', temperature: 14.5 },
  { month: 'Apr', city: 'London', temperature: 8.5 },
  { month: 'May', city: 'Tokyo', temperature: 18.4 },
  { month: 'May', city: 'London', temperature: 11.9 },
  { month: 'Jun', city: 'Tokyo', temperature: 21.5 },
  { month: 'Jun', city: 'London', temperature: 15.2 },
  { month: 'Jul', city: 'Tokyo', temperature: 25.2 },
  { month: 'Jul', city: 'London', temperature: 17 },
  { month: 'Aug', city: 'Tokyo', temperature: 26.5 },
  { month: 'Aug', city: 'London', temperature: 16.6 },
  { month: 'Sep', city: 'Tokyo', temperature: 23.3 },
  { month: 'Sep', city: 'London', temperature: 14.2 },
  { month: 'Oct', city: 'Tokyo', temperature: 18.3 },
  { month: 'Oct', city: 'London', temperature: 10.3 },
  { month: 'Nov', city: 'Tokyo', temperature: 13.9 },
  { month: 'Nov', city: 'London', temperature: 6.6 },
  { month: 'Dec', city: 'Tokyo', temperature: 9.6 },
  { month: 'Dec', city: 'London', temperature: 4.8 },
];

const chart = new Chart();

const common = node => node.encode('x', 'month').encode('y', 'temperature).encode('color', 'city');

chart.data(data);

chart.line().call(common).encode('shape', 'circle');

chart.point().call(common).encode('shape', 'point');

// 指定 legendFilter 交互
// 暂时不默认设置，之后和 tooltip 一起默认设置
chart.interaction({ type: 'legendFilter' });

chart.render();

实现思路

• 获得图例实例
• 监听事件
• 管理图例状态

[pearmini]

第一个 PR 只会实现对离散的数据的 filter