echarts 折线图循环滚动显示

最新推荐文章于 2024-12-23 13:40:12 发布

原创最新推荐文章于 2024-12-23 13:40:12 发布 · 729 阅读

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#echarts #javascript

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折线滚动显示

代码块

import * as echarts from 'echarts';

var chartDom = document.getElementById('main');
var myChart = echarts.init(chartDom);
var option;

option = {
  title: {
    text: 'Stacked Line'
  },
  tooltip: {
    trigger: 'axis'
  },
  legend: {
    data: [
      'Email',
      'Union Ads',
      'Video Ads',
      'Direct',
      'Search Engine',
      'Search Engine'
    ]
  },
  grid: {
    left: '3%',
    right: '4%',
    bottom: '3%',
    containLabel: true
  },
  toolbox: {
    feature: {
      saveAsImage: {}
    }
  },
  xAxis: {
    type: 'category',
    boundaryGap: false,
    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun', 'Sat', 'Sun']
  },
  yAxis: {
    type: 'value'
  },
  dataZoom: {
    show: false,
    type: 'slider',
    startValue: 0,
    // 数据窗口范围的结束数值（一页显示多少条数据）
    endValue: 4
  },
  series: [
    {
      name: 'Email',
      type: 'line',
      stack: 'Total',
      data: [120, 132, 101, 134, 90, 230, 210, 230, 210]
    },
    {
      name: 'Union Ads',
      type: 'line',
      stack: 'Total',
      data: [220, 182, 191, 234, 290, 330, 310, 230, 210]
    },
    {
      name: 'Video Ads',
      type: 'line',
      stack: 'Total',
      data: [150, 232, 201, 154, 190, 330, 410, 230, 210]
    },
    {
      name: 'Direct',
      type: 'line',
      stack: 'Total',
      data: [320, 332, 301, 334, 390, 330, 320, 230, 210]
    },
    {
      name: 'Search Engine',
      type: 'line',
      stack: 'Total',
      data: [820, 932, 901, 934, 1290, 1330, 1320, 230, 210]
    }
  ]
};
setInterval(function () {
  // 每次向后滚动一个，最后一个从头开始。
  // 判断option.dataZoom.endValue是否等于总条数，从第一条开始循环滚动
  if (option.dataZoom.endValue == 8) {
    option.dataZoom.endValue = 5;
    option.dataZoom.startValue = 0;
  } else {
    option.dataZoom.endValue = option.dataZoom.endValue + 1;
    option.dataZoom.startValue = option.dataZoom.startValue + 1;
  }
  myChart.setOption(option);
}, 2000);

option && myChart.setOption(option);