javascript - 更改 Google 堆积条形图颜色( Material 条形图)

Question

var data = google.visualization.arrayToDataTable(stats_data);

var options = {
    width: 1400,
    height: 400,
    legend: { position: 'top', maxLines: 3 },
    bar: { groupWidth: '75%' },
    isStacked: true,
    bars: 'vertical',
    colors:['#999','#346ac9', '#279423', '#fc9826'],
};

var chart = new google.charts.Bar(document.getElementById('chart-recent'));
chart.draw(data, google.charts.Bar.convertOptions(options));

我有一个堆叠条形图，我希望每种颜色都不同(灰色、蓝色、绿色、橙色)。但是，分区的颜色在多个亮度中只取第一种颜色(灰色)。

我也在我的选项中试过这个:

series: [
    {color: '#999'},
    {color: '#346ac9'},
    {color: '#279423'},
    {color: '#fc9826'}
]

如何让每个系列都有不同的颜色？

Answer 1

在最初提出问题时，Material Bar Chart 可能还不支持堆叠条形图的自定义颜色。

今天，作为颜色对象数组 的series 配置选项似乎工作正常。请参阅下面示例中的 colors 变量。

示例代码:

const data = [
   ['Sector',        'High', 'Medium', 'Low' ],
   ['Agriculture',   18,  9, 29],
   ['Education',      2, 14, 10],
   ['Healthcare',     4,  6, 41],
   ['Manufacturing', 36, 10,  3]
   ];
const colors = [
   { color: 'indianred' },  //high
   { color: 'khaki' },      //medium
   { color: 'seagreen' },   //low
   ];

const drawChart = () => {
   const options = {
      chart:   { title: 'Risk by sector' },
      legend:  { position: 'top' },  //not yet supported
      bars:    'horizontal',
      stacked: true,
      series:  colors
      };
   const chartData = google.visualization.arrayToDataTable(data);
   const elem = $('figure#health-chart')[0];
   const chart = new google.charts.Bar(elem);
   chart.draw(chartData, options);
   };

google.charts.load('current', { packages: ['bar'] });
google.charts.setOnLoadCallback(drawChart);

结果图表:

摆弄代码:
https://jsfiddle.net/p8bnfe2h

配置选项

series
An array of objects, each describing the format of the corresponding series in the chart. To use default values for a series, specify an empty object {}. If a series or a value is not specified, the global value will be used.

文档:
https://developers.google.com/chart/interactive/docs/gallery/barchart#configuration-options