Transparent Background on Piechart?

Vincent Fraser

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Aug 27, 2014, 10:18:17 AM8/27/14

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Is is posiable for me to make the Pie Chart have a transparent back ground? Where would i put it in the code?

<html>
<head>
    
    <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', '0.5', {'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() {

        // Create the data table.
        var data = new google.visualization.DataTable();
        data.addColumn('string', 'Topping');
        data.addColumn('number', 'Slices');
        data.addRows([
        //    ['Test', 6],
          ['Foucs',5],
          ['Euphoric', 4],
          ['Creative', 4],
          ['Sleepy', 2],
          ['Paranoia', 1]
        ]);

        // Set chart options
        var options = {'title':'Effects',
                       'width':400,
                       'height':300};

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

<body>
    
    <div id="chart_div"></div>
</body>
</html>

Andrew Gallant

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Aug 27, 2014, 8:13:41 PM8/27/14

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Set the backgroundColor option to "transparent":

var options = {

'title':'Effects',

'width':400,

'height':300,

backgroundColor: 'transparent'

};

This does not work in IE8 and older, as the API does not support transparency in VML, which what IE8 uses to draw the charts.

Vincent Fraser

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Aug 27, 2014, 8:21:59 PM8/27/14

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Thank you so much!

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