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demo.html
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demo.html
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<!doctype html>
<html><head><title>bwip-js - JavaScript Barcode Generator</title>
<meta charset="utf-8" />
<meta name="keywords" content="bar code, barcode generator, online barcode generator, free barcode generator, javascript, javascript library, nodejs, QR Code, EAN, EAN 13, Code 128, UPC, ISBN, ITF 14, Code 39, GS1, GS1 128, PDF417, HIBC, DataMatrix, Data Matrix, DataBar, OCR, OCR B, OCR font, Aztec Code, PostNet, USPS, Pharmacode" />
<meta name="description" content="JavaScript barcode generator and library. Create any barcode in your browser." />
<link rel="stylesheet" type="text/css" href="lib/demo.css">
<script type="text/javascript" src="dist/bwip-js-min.js"></script>
<script type="text/javascript" src="lib/symdesc.js"></script>
<script type="text/javascript" src="lib/canvas-toblob.js"></script>
<script type="text/javascript" src="lib/filesaver.js"></script>
<script type="text/javascript" src="lib/inconsolata.js"></script>
<script type="text/javascript">
window.addEventListener('load', function() {
var lastSymbol, lastBarText, lastAltText, lastOptions, lastRotate, lastScaleX, lastScaleY;
try {
lastSymbol = localStorage.getItem('bwipjsLastSymbol');
lastBarText = localStorage.getItem('bwipjsLastBarText');
lastAltText = localStorage.getItem('bwipjsLastAltText');
lastOptions = localStorage.getItem('bwipjsLastOptions');
lastRotate = localStorage.getItem('bwipjsLastRotate');
lastScaleX = +localStorage.getItem('bwipjsLastScaleX');
lastScaleY = +localStorage.getItem('bwipjsLastScaleY');
} catch (e) {
}
// Set up the select list of barcode types
var sel = document.getElementById('symbol');
var opts = [];
for (var id in symdesc) {
opts.push(symdesc[id]);
}
opts.sort(function (a,b) { return a.desc < b.desc ? -1 : 1 });
for (var i = 0, l = opts.length; i < l; i++) {
var elt = document.createElement('option');
elt.textContent = opts[i].desc;
elt.value = opts[i].sym;
sel.appendChild(elt);
}
sel.addEventListener('change', function(ev) {
var desc = symdesc[sel.value];
if (desc) {
document.getElementById('symtext').value = desc.text;
document.getElementById('symopts').value = desc.opts;
} else {
document.getElementById('symtext').value = '';
document.getElementById('symopts').value = '';
}
document.getElementById('symaltx').value = '';
document.getElementById('saveas').style.visibility = 'hidden';
document.getElementById('stats').textContent = '';
var canvas = document.getElementById('canvas');
canvas.width = canvas.width;
});
if (lastSymbol) {
sel.value = lastSymbol;
} else {
sel.selectedIndex = 0;
}
var evt = document.createEvent("HTMLEvents");
evt.initEvent("change", false, true);
sel.dispatchEvent(evt);
if (lastBarText) {
document.getElementById('symtext').value = lastBarText;
document.getElementById('symaltx').value = lastAltText;
document.getElementById('symopts').value = lastOptions;
}
if (lastScaleX && lastScaleY) {
document.getElementById('scaleX').value = lastScaleX;
document.getElementById('scaleY').value = lastScaleY;
}
if (lastRotate) {
document.getElementById('rotate' + lastRotate).checked = true;
}
document.getElementById('scaleX').addEventListener('change', function(ev) {
document.getElementById('scaleY').value = ev.target.value;
});
document.getElementById('render').addEventListener('click', render);
document.getElementById('saveas').style.visibility = 'hidden';
// Allow Enter to render
document.getElementById('params').addEventListener('keypress', function(ev) {
if (ev.which == 13) {
render();
ev.stopPropagation();
ev.preventDefault();
return false;
}
});
document.getElementById('versions').textContent =
'bwip-js ' + bwipjs.BWIPJS_VERSION + ' / BWIPP ' + bwipjs.BWIPP_VERSION;
// A reasonable match to OCR-B metrics.
bwipjs.loadFont("Inconsolata", 95, 105, Inconsolata);
});
function render() {
var elt = symdesc[document.getElementById('symbol').value];
var text = document.getElementById('symtext').value.trim();
var alttext = document.getElementById('symaltx').value.trim();
var options = document.getElementById('symopts').value.trim();
var rotate = document.querySelector('input[name="rotate"]:checked').value;
var scaleX = +document.getElementById('scaleX').value || 2;
var scaleY = +document.getElementById('scaleY').value || 2;
try {
localStorage.setItem('bwipjsLastSymbol', elt.sym);
localStorage.setItem('bwipjsLastBarText', text);
localStorage.setItem('bwipjsLastAltText', alttext);
localStorage.setItem('bwipjsLastOptions', options);
localStorage.setItem('bwipjsLastScaleX', scaleX);
localStorage.setItem('bwipjsLastScaleY', scaleY);
localStorage.setItem('bwipjsLastRotate', rotate);
} catch (e) {
}
// Clear the page
document.getElementById('output').value = '';
document.getElementById('stats').value = '';
document.getElementById('saveas').style.visibility = 'hidden';
document.getElementById('output').textContent = '';
var canvas = document.getElementById('canvas');
canvas.height = 1;
canvas.width = 1;
canvas.style.visibility = 'hidden';
// Convert the options to an object.
let opts = {};
let aopts = options.split(' ');
for (let i = 0; i < aopts.length; i++) {
if (!aopts[i]) {
continue;
}
var eq = aopts[i].indexOf('=');
if (eq == -1) {
opts[aopts[i]] = true;
} else {
opts[aopts[i].substr(0, eq)] = aopts[i].substr(eq+1);
}
}
// Finish up the options
opts.text = text;
opts.bcid = elt.sym;
opts.scaleX = scaleX;
opts.scaleY = scaleY;
opts.rotate = rotate;
if (alttext) {
opts.alttext = alttext;
}
// Draw the bar code to the canvas
try {
let ts0 = new Date;
bwipjs.toCanvas(canvas, opts);
show(ts0, new Date);
} catch (e) {
// Watch for BWIPP generated raiseerror's.
var msg = (''+e).trim();
if (msg.indexOf("bwipp.") >= 0) {
document.getElementById('output').textContent = msg;
} else if (e.stack) {
// GC includes the message in the stack. FF does not.
document.getElementById('output').textContent =
(e.stack.indexOf(msg) == -1 ? msg + '\n' : '') + e.stack;
} else {
document.getElementById('output').textContent = msg;
}
return;
}
function show(ts0, ts1) {
canvas.style.visibility = 'visible';
setURL();
document.getElementById('stats').textContent = 'Rendered in ' + (ts1-ts0) + ' msecs.';
document.getElementById('saveas').style.visibility = 'visible';
saveCanvas.basename = elt.sym + '-' + text.replace(/[^a-zA-Z0-9._]+/g, '-');
}
}
function saveCanvas(type, ext) {
var canvas = document.getElementById('canvas');
canvas.toBlob(function (blob) {
saveAs(blob, saveCanvas.basename + ext);
}, type, 1);
}
function setURL() {
var elt = symdesc[document.getElementById('symbol').value];
var text = document.getElementById('symtext').value.trim();
var alttext = document.getElementById('symaltx').value.trim();
var options = document.getElementById('symopts').value.trim();
var rotate = document.querySelector('input[name="rotate"]:checked').value;
var scaleX = +document.getElementById('scaleX').value || 2;
var scaleY = +document.getElementById('scaleY').value || scaleX;
var url = 'http://bwipjs-api.metafloor.com/?bcid=' + elt.sym +
'&text=' + encodeURIComponent(text) +
(alttext ? '&alttext=' + encodeURIComponent(alttext) : '') +
(options ? '&' + options.replace(/ +/g, '&') : '') +
(rotate != 'N' ? '&rotate=' + rotate : '') +
(scaleX == scaleY ? '&scale=' + scaleX
: '&scaleX=' + scaleX + '&scaleY=' + scaleY)
;
document.getElementById('apiurl').href = url;
}
</script>
</head><body>
<div id="header">
<div id="bwip-js">bwip-js // Barcode Writer in Pure JavaScript</div>
<div id="versions"></div>
</div>
<div id="params">
<table border=0 cellpading=0 cellspacing=0><tr>
<td style="vertical-align:top">
<table border=0 cellpading=0 cellspacing=0>
<tr><th>Barcode Type:<td><select id="symbol"></select>
<tr><th>Bar Text:<td><input id="symtext" type="text">
<tr><th>Alt Text:<td><input id="symaltx" type="text">
<tr><th>Options:<td><input id="symopts" type="text">
<tr><td><td>
<div id="saveas">
<a class="saveas" href="javascript:saveCanvas('image/png','.png')">Save As PNG</a>
<a class="saveas" href="javascript:saveCanvas('image/jpeg','.jpg')">Save As JPEG</a>
<a class="saveas" id="apiurl" href="">Goto URL</a>
</div>
<div id="stats"></div>
</table>
<td style="padding-left:10mm;vertical-align:top">
<table border=0 cellpading=0 cellspacing=5>
<tr><th>Scale X,Y:<td>
<input type="number" min=1 max=9 step=1 id="scaleX" value=2>
<input type="number" min=1 max=9 step=1 id="scaleY" value=2>
<tr><th>Image Rotation:<td>
<label for="rotateN"><input type="radio" name="rotate" value="N"
id="rotateN" checked>Normal</label>
<label for="rotateR"><input type="radio" name="rotate" value="R"
id="rotateR">Right</label>
<label for="rotateL"><input type="radio" name="rotate" value="L"
id="rotateL">Left</label>
<label for="rotateI"><input type="radio" name="rotate" value="I"
id="rotateI">Invert</label>
<tr><td><td><button style="margin-top:1ex" id="render">Show Barcode</button>
</table>
<tr><td><br>
</table>
</div>
<div id="content">
<canvas id="canvas" width=1 height=1 style="border:1px solid #fff;visibility:hidden"></canvas>
<div id="output" style="white-space:pre"></div>
</div>
</body>
</html>