Javascript 使用Google图表在画布中显示饼图_Javascript_Html_Canvas_Charts_Google Visualization

Javascript 使用Google图表在画布中显示饼图

javascript html canvas charts google-visualization

Javascript 使用Google图表在画布中显示饼图,javascript,html,canvas,charts,google-visualization,Javascript,Html,Canvas,Charts,Google Visualization,我正在尝试使用以下代码在画布中显示交互式饼图： <html> <head>  <script type="text/javascript" src="https://www.google.com/jsapi"></script> <script type="text/javascript"> // Load the Visualizat

我正在尝试使用以下代码在画布中显示交互式饼图：

<html>
  <head>
    <!--Load the AJAX API-->
    <script type="text/javascript" src="https://www.google.com/jsapi"></script>
    <script type="text/javascript">

      // Load the Visualization API and the piechart package.
      google.load('visualization', '1.0', {'packages':['corechart']});

      // Set a callback to run when the Google Visualization API is loaded.
      google.setOnLoadCallback(drawChart);

      // Callback that creates and populates a data table,
      // instantiates the pie chart, passes in the data and
      // draws it.
      function drawChart() {
        var context = document.getElementById('myCanvas').getContext('2d');
        // Create the data table.
        var data = new google.visualization.DataTable();
        data.addColumn('string', 'Topping');
        data.addColumn('number', 'Slices');
        data.addRows([
          ['Mushrooms', 3],
          ['Onions', 1],
          ['Olives', 1],
          ['Zucchini', 1],
          ['Pepperoni', 2]
        ]);

        // Set chart options
        var options = {'title':'How Much Pizza I Ate Last Night',
                       'width':800,
                       'height':800};

        // Instantiate and draw our chart, passing in some options.
        var chart = new google.visualization.PieChart(context);
        chart.draw(data, options);
      }
    </script>
  </head>

  <body>
    <!--canvas that will hold the pie chart-->
    <canvas id="myCanvas"></canvas>
  </body>
</html>

但当我尝试在画布内部显示时，它不会显示任何内容。。。请告诉我我做错了什么？

我不确定仅仅使用google api而不进行任何转换是否可行。如果我没有错的话，谷歌图表是用SVG或VML绘制的。看看highcharts.js怎么样？？我只想让这些图表的容器成为我的应用程序的画布元素……我认为highcharts.js也使用SVG。那么，我还剩下什么呢？必须有一种在画布中显示交互式图表的方法…Chart.js是一种可能性。很可能还有其他一些。例如，见

var chart = new google.visualization.PieChart(document.getElementById('div'));