imageDataURL

Returns a PNG image of the gauge encoded as a Data URL.

This method is obsoleted and replaced by exportImage, but will remain fully functional.

Returns

String A data URL with image/png MIME type. Will be null if the browser does not support the canvas element.

Example - show a snapshot of the gauge

<div id="gauge"></div>
<a download="export.png" id="export" class="k-button">Export PNG</a>
<script>
$("#gauge").kendoLinearGauge({
    pointer: {
        value: 50
    },
    scale: {
        min: 0,
        max: 100
    }
});

$("#export").on("click", function() {
  var gauge = $("#gauge").data("kendoLinearGauge");
  var imageDataURL = gauge.imageDataURL();

  if (navigator.msSaveBlob) {
    var blob = toBlob(imageDataURL, "image/png");
    navigator.msSaveBlob(blob, this.getAttribute("download"));
  } else {
    this.href = imageDataURL;
  }
});

// See: https://goo.gl/qlg5dd
function toBlob(base64, type) {
  var rawData = base64.substring(base64.indexOf("base64,") + 7);
  var data = atob(rawData);
  var arr = new Uint8Array(data.length);

  for (var i = 0; i < data.length; ++i) {
    arr[i] = data.charCodeAt(i);
  }

  return new Blob([ arr.buffer ], { type: type });
}
</script>