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QR scan frappe
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#preview { | |
display: none; | |
} | |
#preview.active { | |
width: 100vw; | |
top: 0; | |
left: 0; | |
position: fixed; | |
display: block; | |
} |
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Learn more about bidirectional Unicode characters
var head = document.getElementsByTagName('head')[0]; | |
var script = document.createElement('script'); | |
script.type = 'text/javascript'; | |
script.src = "https://unpkg.com/@zxing/library@latest"; | |
script.async = false; | |
head.appendChild(script); | |
var video = document.createElement('video'); | |
video.id = 'preview'; | |
var activeInput = null; | |
// var videoButton = document.createElement('button'); | |
// videoButton.id = 'video_button'; | |
$(function () { | |
$('form').append(video); | |
var codeReader; | |
var selectedDeviceId; | |
script.addEventListener('load', function () { | |
codeReader = new ZXing.BrowserMultiFormatReader(); | |
}); | |
function stop() { | |
$('#preview').removeClass('active'); | |
codeReader.reset(); | |
} | |
var allDevices = []; | |
var selectedDeviceIndex = null; | |
function start() { | |
console.log('ZXing code reader initialized') | |
codeReader.listVideoInputDevices() | |
.then(function (videoInputDevices) { | |
allDevices = videoInputDevices; | |
if (selectedDeviceIndex === null) { | |
selectedDeviceIndex = allDevices.length - 1; | |
} | |
selectedDeviceId = videoInputDevices[selectedDeviceIndex].deviceId; | |
codeReader.decodeFromVideoDevice(selectedDeviceId, 'preview', (result, err) => { | |
if (result) { | |
console.log('result', result); | |
activeInput.val(result.text); | |
stop(); | |
// console.log(result) | |
// document.getElementById('result').textContent = result.text | |
} | |
if (err && !(err instanceof ZXing.NotFoundException)) { | |
alert(err); | |
stop(); | |
// document.getElementById('result').textContent = err | |
} | |
}) | |
console.log(`Started continous decode from camera with id ${selectedDeviceId}`) | |
}) | |
.catch((err) => { | |
console.error(err) | |
}); | |
} | |
$('input[data-fieldname^="cqr"], input[data-fieldname^="cQR"]').each(function () { | |
var $this = $(this); | |
$this.attr('disabled', 'disabled'); | |
var button = document.createElement('button'); | |
button.className = 'btn btn-primary btn-sm ml-2'; | |
button.innerHTML = 'Scan'; | |
button.onclick = function () { | |
activeInput = $this; | |
$('#preview').addClass('active'); | |
start(); | |
} | |
$(this).parents('.control-input').eq(0).addClass('flex'); | |
$(this).parents('.control-input').eq(0).append(button); | |
}); | |
$('body').on('click', 'video#preview', function () { | |
if (allDevices.length > 0) { | |
var newIndex = selectedDeviceIndex + 1; | |
if (newIndex < allDevices.length) { | |
selectedDeviceIndex = newIndex; | |
} else { | |
selectedDeviceIndex = 0; | |
} | |
start(); | |
} | |
}) | |
}); |
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