如何使用Highcharts导出多种尺寸的图表？

Question

I'm trying to create a Highchart chart that can be downloaded as a PNG in multiple resolutions.

I've created this JSFiddle file as a test: http://jsfiddle.net/4v133hnm/26/

Here's the relevant code, I think:

export_for_print = function() {
  var chart = $('#container').highcharts();
  chart.exportChartLocal(null, {
    chart: {
      sourceWidth: 4000,
      sourceHeight: 2000,
      scale: 6
    }
  });
};

The export works fine, but it only comes through in a single resolution.

If you take a look at the custom "Export for email/desktop/print" functions, I've tried changing the sourceWidth, sourceHeight, and scale attributes, but no matter what I do, the PNG downloaded from the chart is 1200x800.

I'd really appreciate any help with this issue — thanks!

Answer 1

The first argument is for exporting options so you should change your code to this:

export_for_print = function() {
  var chart = $('#container').highcharts();
  chart.exportChartLocal({
     sourceWidth: 4000,
     sourceHeight: 2000,
     scale: 6
  }, null);
};

http://api.highcharts.com/highcharts#Chart.exportChart

Answer 2

take a look on the documentation:

You need change the scale, the scale will change your resolution.

Here you can see one example with two different resolutions, 600x400 and 1200x800:

http://api.highcharts.com/highcharts#exporting.scale

 $(function () { $('#container').highcharts({ title: { text: 'Highcharts exporting scale demo' }, subtitle: { text: 'This subtitle is HTML', useHTML: true }, xAxis: { categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'] }, series: [{ data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4] }], exporting: { allowHTML: true, enabled: false } }); $('button.export').click(function () { $('#container').highcharts() .exportChart({ scale: $(this).data().scale//take a look here }); }); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> <script src="https://code.highcharts.com/highcharts.js"></script> <script src="https://code.highcharts.com/modules/exporting.js"></script> <div style="width: 600px; margin: 0 auto"> <div id="container" style="height: 400px"></div> <button class="export" data-scale="1">Scale = 1</button> <button class="export" data-scale="2">Scale = 2</button> </div>