css - Google 可视化 - 更改大小图例 AnnotationChart

Question

我的页面中有一个包含多个列的 AnnotationChart。构建图表时，在顶部创建的图例具有较小的字体大小。可以增加此图例的字体大小吗？

我用这种图表的一个小例子创建了一个 plunker。

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

      function drawChart() {
        var data = new google.visualization.DataTable();
        data.addColumn('date', 'Date');
        data.addColumn('number', 'Kepler-22b mission');
        data.addColumn('string', 'Kepler title');
        data.addColumn('string', 'Kepler text');
        data.addColumn('number', 'Gliese 163 mission');
        data.addColumn('string', 'Gliese title');
        data.addColumn('string', 'Gliese text');
        data.addRows([
          [new Date(2314, 2, 15), 12400, undefined, undefined,
                                  10645, undefined, undefined],
          [new Date(2314, 2, 16), 24045, 'Lalibertines', 'First encounter',
                                  12374, undefined, undefined],
          [new Date(2314, 2, 17), 35022, 'Lalibertines', 'They are very tall',
                                  15766, 'Gallantors', 'First Encounter'],
          [new Date(2314, 2, 18), 12284, 'Lalibertines', 'Attack on our crew!',
                                  34334, 'Gallantors', 'Statement of shared principles'],
          [new Date(2314, 2, 19), 8476, 'Lalibertines', 'Heavy casualties',
                                  66467, 'Gallantors', 'Mysteries revealed'],
          [new Date(2314, 2, 20), 0, 'Lalibertines', 'All crew lost',
                                  79463, 'Gallantors', 'Omniscience achieved']
        ]);

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

        var options = {
          displayAnnotations: true,
          legendPosition: 'newRow',                   
          displayZoomButtons: false
        };

        chart.draw(data, options);
      }

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
       <div id='chart_div' style='width: 900px; height: 500px;'></div>
   

Answer 1

你可以使用 css 来改变 font-size...

#chart_div_AnnotationChart_legendContainer {
  font-size: 12pt;
}

请参阅以下工作片段...

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

function drawChart() {
  var data = new google.visualization.DataTable();
  data.addColumn('date', 'Date');
  data.addColumn('number', 'Kepler-22b mission');
  data.addColumn('string', 'Kepler title');
  data.addColumn('string', 'Kepler text');
  data.addColumn('number', 'Gliese 163 mission');
  data.addColumn('string', 'Gliese title');
  data.addColumn('string', 'Gliese text');
  data.addRows([
    [new Date(2314, 2, 15), 12400, undefined, undefined,
                            10645, undefined, undefined],
    [new Date(2314, 2, 16), 24045, 'Lalibertines', 'First encounter',
                            12374, undefined, undefined],
    [new Date(2314, 2, 17), 35022, 'Lalibertines', 'They are very tall',
                            15766, 'Gallantors', 'First Encounter'],
    [new Date(2314, 2, 18), 12284, 'Lalibertines', 'Attack on our crew!',
                            34334, 'Gallantors', 'Statement of shared principles'],
    [new Date(2314, 2, 19), 8476, 'Lalibertines', 'Heavy casualties',
                            66467, 'Gallantors', 'Mysteries revealed'],
    [new Date(2314, 2, 20), 0, 'Lalibertines', 'All crew lost',
                            79463, 'Gallantors', 'Omniscience achieved']
  ]);

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

  var options = {
    displayAnnotations: true,
    legendPosition: 'newRow',
    displayZoomButtons: false
  };

  chart.draw(data, options);
}

#chart_div_AnnotationChart_legendContainer {
  font-size: 12pt;
}

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<div id='chart_div' style='width: 900px; height: 500px;'></div>