如何在pdf中导出谷歌图表？

Question

我画了谷歌图表.现在,我想把按钮以pdf格式保存图表.我从这里看起来将谷歌图表保存为pdf和堆栈中可用的其他问题,但它不起作用.

通过已使用的谷歌图表打印png图像,但它只是打开一个带有png图像的新选项卡,但它不会为用户打开另存为pdf窗口.

有谁知道有办法吗？

Answer 1

您可以使用jsPDF来创建PDF

使用方法addImage将图表的图像uri添加到pdf中

请参阅以下工作代码段...

google.charts.load('current', {
  packages: ['controls', 'corechart', 'table']
}).then(function () {
  var data = new google.visualization.DataTable();
  data.addColumn('number', 'X');
  data.addColumn('number', 'y0');
  data.addRows([
    [0, 0],   [1, 10],  [2, 23],  [3, 17],  [4, 18],  [5, 9],
    [6, 11],  [7, 27],  [8, 33],  [9, 40],  [10, 32], [11, 35],
    [12, 30], [13, 40], [14, 42], [15, 47], [16, 44], [17, 48],
    [18, 52], [19, 54], [20, 42], [21, 55], [22, 56], [23, 57],
    [24, 60], [25, 50], [26, 52], [27, 51], [28, 49], [29, 53],
    [30, 55], [31, 60], [32, 61], [33, 59], [34, 62], [35, 65],
    [36, 62], [37, 58], [38, 55], [39, 61], [40, 64], [41, 65],
    [42, 63], [43, 66], [44, 67], [45, 69], [46, 69], [47, 70],
    [48, 72], [49, 68], [50, 66], [51, 65], [52, 67], [53, 70],
    [54, 71], [55, 72], [56, 73], [57, 75], [58, 70], [59, 68],
    [60, 64], [61, 60], [62, 65], [63, 67], [64, 68], [65, 69],
    [66, 70], [67, 72], [68, 75], [69, 80]
  ]);

  var container = document.getElementById('chart_div');
  var chart = new google.visualization.LineChart(container);
  var btnSave = document.getElementById('save-pdf');

  google.visualization.events.addListener(chart, 'ready', function () {
    btnSave.disabled = false;
  });

  btnSave.addEventListener('click', function () {
    var doc = new jsPDF();
    doc.addImage(chart.getImageURI(), 0, 0);
    doc.save('chart.pdf');
  }, false);

  chart.draw(data, {
    chartArea: {
      bottom: 24,
      left: 36,
      right: 12,
      top: 48,
      width: '100%',
      height: '100%'
    },
    height: 600,
    title: 'chart title',
    width: 600
  });
});

<script src="https://www.gstatic.com/charts/loader.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.3.5/jspdf.min.js"></script>
<input id="save-pdf" type="button" value="Save as PDF" disabled />
<div id="chart_div"></div>