Stick tooltip in the center of ring and pie charts

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>

  <script nonce="undefined" src="https://cdn.zingchart.com/zingchart.min.js"></script>
  <style></style>
</head>

<body>
  <div id='myChart'></div>
  <script>
    ZC.LICENSE = ["569d52cefae586f634c54f86dc99e6a9", "b55b025e438fa8a98e32482b5f768ff5"];
    var myConfig = {
      type: "ring",
      title: {
        text: 'Center Sticky Tooltip Custom'
      },
      plot: {
        slice: 60,
        detach: false,
        tooltip: {
          fontSize: 16,
          anchor: 'c',
          x: '50%',
          y: '48%',
          sticky: true,
          backgroundColor: 'none',
          text: '<span style="color:%color">%t</span><br><span style="color:%color">%v</span>'
        }
      },
      legend: {
        verticalAlign: "bottom",
        align: "center"
      },
      series: [{
          values: [50],
          text: "Thing 1"
        },
        {
          values: [35],
          text: "Thing 2"
        },
        {
          values: [20],
          text: "Thing 3"
        }
      ]
    };

    zingchart.render({
      id: 'myChart',
      data: myConfig,
      height: 400,
      width: '100%'
    });
  </script>
</body>

</html>

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>

  <script src="https://cdn.zingchart.com/zingchart.min.js"></script>
</head>

<body>
  <div id='myChart'></div>
</body>

</html>

var myConfig = {
  type: "ring",
  title: {
    text: 'Center Sticky Tooltip Custom'
  },
  plot: {
    slice: 60,
    detach: false,
    tooltip: {
      fontSize: 16,
      anchor: 'c',
      x: '50%',
      y: '48%',
      sticky: true,
      backgroundColor: 'none',
      text: '<span style="color:%color">%t</span><br><span style="color:%color">%v</span>'
    }
  },
  legend: {
    verticalAlign: "bottom",
    align: "center"
  },
  series: [{
      values: [50],
      text: "Thing 1"
    },
    {
      values: [35],
      text: "Thing 2"
    },
    {
      values: [20],
      text: "Thing 3"
    }
  ]
};

zingchart.render({
  id: 'myChart',
  data: myConfig,
  height: 400,
  width: '100%'
});