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Add ID for canvas and link to download. #124

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Add ID for canvas and link to download. #124

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1 change: 1 addition & 0 deletions examples/Download_PNG.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
<!DOCTYPE html><html><head><title>Demo page</title></head><body><p> TODO make a nice looking pure client qrcode generator even allow download of the image</p><a id="output"></a><script src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script><!-- TEST jquery.qrcode.js--><script type="text/javascript" src="../src/qrcode.js"></script><script type="text/javascript" src="../src/jquery.qrcode.js">/*Need to include "../src/qrcode.js" at first*/</script><!-- TEST jquery.qrcode.min.js <script type="text/javascript" src="../jquery.qrcode.min.js"></script>--><script>jQuery(function(){ var aElement = jQuery('#output'); aElement.qrcode( { render: 'canvas', width: 256, height: 256, text: "http://jetienne.com", id: "canvasID" //set ID for canvas element } ); var qrcode = document.getElementById("canvasID"); //get canvas element by ID aElement.attr('href', qrcode.toDataURL("image/png")); //set qrcode from canvas as base64-dataURL aElement.attr('download', 'filename.png'); //add filename in download attribute aElement.attr('title', 'Click to download as PNG-file'); //add title tooltip.})</script></body></html>
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2 changes: 1 addition & 1 deletion jquery.qrcode.min.js
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5 changes: 5 additions & 0 deletions src/jquery.qrcode.js
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,11 @@
var canvas = document.createElement('canvas');
canvas.width = options.width;
canvas.height = options.height;

if(typeof options.id !== 'undefined' && options.id!==''){
canvas.id = options.id; //set id for canvas element
}

var ctx = canvas.getContext('2d');

// compute tileW/tileH based on options.width/options.height
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