mirror of
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89 lines
2.8 KiB
JavaScript
89 lines
2.8 KiB
JavaScript
(function( $ ){
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$.fn.qrcode = function(options) {
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// if options is string,
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if( typeof options === 'string' ){
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options = { text: options };
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}
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// set default values
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// typeNumber < 1 for automatic calculation
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options = $.extend( {}, {
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render : "canvas",
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width : 256,
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height : 256,
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typeNumber : -1,
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correctLevel : QRErrorCorrectLevel.H,
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background : "#ffffff",
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foreground : "#000000"
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}, options);
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var createCanvas = function(){
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// create the qrcode itself
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var qrcode = new QRCode(options.typeNumber, options.correctLevel);
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qrcode.addData(options.text);
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qrcode.make();
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// create canvas element
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var canvas = document.createElement('canvas');
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canvas.width = options.width;
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canvas.height = options.height;
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var ctx = canvas.getContext('2d');
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// compute tileW/tileH based on options.width/options.height
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var tileW = options.width / qrcode.getModuleCount();
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var tileH = options.height / qrcode.getModuleCount();
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// draw in the canvas
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for( var row = 0; row < qrcode.getModuleCount(); row++ ){
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for( var col = 0; col < qrcode.getModuleCount(); col++ ){
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ctx.fillStyle = qrcode.isDark(row, col) ? options.foreground : options.background;
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var w = (Math.ceil((col+1)*tileW) - Math.floor(col*tileW));
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var h = (Math.ceil((row+1)*tileW) - Math.floor(row*tileW));
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ctx.fillRect(Math.round(col*tileW),Math.round(row*tileH), w, h);
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}
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}
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// return just built canvas
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return canvas;
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}
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// from Jon-Carlos Rivera (https://github.com/imbcmdth)
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var createTable = function(){
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// create the qrcode itself
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var qrcode = new QRCode(options.typeNumber, options.correctLevel);
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qrcode.addData(options.text);
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qrcode.make();
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// create table element
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var $table = $('<table></table>')
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.css("width", options.width+"px")
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.css("height", options.height+"px")
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.css("border", "0px")
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.css("border-collapse", "collapse")
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.css('background-color', options.background);
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// compute tileS percentage
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var tileW = options.width / qrcode.getModuleCount();
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var tileH = options.height / qrcode.getModuleCount();
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// draw in the table
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for(var row = 0; row < qrcode.getModuleCount(); row++ ){
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var $row = $('<tr></tr>').css('height', tileH+"px").appendTo($table);
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for(var col = 0; col < qrcode.getModuleCount(); col++ ){
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$('<td></td>')
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.css('width', tileW+"px")
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.css('background-color', qrcode.isDark(row, col) ? options.foreground : options.background)
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.appendTo($row);
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}
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}
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// return just built canvas
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return $table;
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}
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return this.each(function(){
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var element = options.render == "canvas" ? createCanvas() : createTable();
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$(element).appendTo(this);
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});
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};
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})( jQuery );
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