Google Chart API：Geo Charts边界颜色 [英] Google Chart API: Geo Charts boundary colour

问题描述

我正在使用Google API中的GEO图表。
我需要知道国家/地区边界的颜色是否可以更改吗？这可以帮助我根据为图表选择的填充颜色更好地区分国家/地区。

I am using a GEO chart from the google API. I needed to know if the colour of the country boundaries can be changed or not?, which might help me distinguish the countries better depending on the fill colour i selected for the graph.

推荐答案

没有用于更改边框颜色的配置选项，

，但是您可以手动更改图表的' 事件。

there are no config options for changing the border color,
but you can change manually, on the chart's 'ready' event.

每个国家/地区都将使用< path> 元素绘制。
每个
< path> 元素将具有描边属性，

是边框颜色。

each country will be drawn with a <path> element.
each <path> element will have a stroke attribute,
which is the border color.

var countries = container.getElementsByTagName('path');
Array.prototype.forEach.call(countries, function(path) {
  path.setAttribute('stroke', 'red');
});

请参阅以下工作摘要...

see following working snippet...

google.charts.load('current', {
  packages: ['geochart'],
  mapsApiKey: 'AIzaSyD-9tSrke72PouQMnMX-a7eZSW0jkFMBWY'
}).then(function () {
  var data = google.visualization.arrayToDataTable([
    ['Country', 'Popularity'],
    ['Germany', 200],
    ['United States', 300],
    ['Brazil', 400],
    ['Canada', 500],
    ['France', 600],
    ['RU', 700]
  ]);

  var container = document.getElementById('chart_div');
  var chart = new google.visualization.GeoChart(container);

  google.visualization.events.addListener(chart, 'ready', function () {
    var countries = container.getElementsByTagName('path');
    Array.prototype.forEach.call(countries, function(path) {
      path.setAttribute('stroke', 'red');
    });
  });

  chart.draw(data, {
    legend: 'none'
  });
});

<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

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