mirror of
https://github.com/serratus/quaggaJS.git
synced 2026-08-13 13:51:37 +08:00
added example for multiple readers; reordered urls
This commit is contained in:
Christoph Oberhofer
@@ -0,0 +1,185 @@
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$(function() {
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var App = {
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init: function() {
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this.overlay = document.querySelector('#interactive canvas.drawing');
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App.attachListeners();
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},
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attachListeners: function() {
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var self = this;
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$(".controls input[type=file]").on("change", function(e) {
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if (e.target.files && e.target.files.length) {
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App.decode(e.target.files[0]);
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}
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});
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$(".controls button").on("click", function(e) {
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var input = document.querySelector(".controls input[type=file]");
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if (input.files && input.files.length) {
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App.decode(input.files[0]);
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}
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});
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$(".controls .reader-config-group").on("change", "input, select", function(e) {
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e.preventDefault();
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var $target = $(e.target),
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value = $target.attr("type") === "checkbox" ? $target.prop("checked") : $target.val(),
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name = $target.attr("name"),
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state = self._convertNameToState(name);
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console.log("Value of "+ state + " changed to " + value);
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self.setState(state, value);
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});
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},
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_accessByPath: function(obj, path, val) {
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var parts = path.split('.'),
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depth = parts.length,
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setter = (typeof val !== "undefined") ? true : false;
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return parts.reduce(function(o, key, i) {
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if (setter && (i + 1) === depth) {
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o[key] = val;
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}
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return key in o ? o[key] : {};
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}, obj);
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},
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_convertNameToState: function(name) {
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return name.replace("_", ".").split("-").reduce(function(result, value) {
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return result + value.charAt(0).toUpperCase() + value.substring(1);
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});
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},
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detachListeners: function() {
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$(".controls input[type=file]").off("change");
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$(".controls .reader-config-group").off("change", "input, select");
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$(".controls button").off("click");
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},
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decode: function(file) {
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this.detachListeners();
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var scanner = Quagga
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.config(this.state)
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.fromSource(file, {size: this.state.inputStream.size});
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scanner
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.toPromise()
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.then(function(result) {
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addToResults(scanner, result);
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return result;
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})
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.catch(function(result) {
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console.log('Not found', result);
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return result;
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})
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.then(function(result) {
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drawResult(scanner, result);
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this.attachListeners();
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}.bind(this));
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},
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setState: function(path, value) {
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var self = this;
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if (typeof self._accessByPath(self.inputMapper, path) === "function") {
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value = self._accessByPath(self.inputMapper, path)(value);
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}
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self._accessByPath(self.state, path, value);
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console.log(JSON.stringify(self.state));
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App.detachListeners();
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App.init();
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},
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inputMapper: {
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inputStream: {
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size: function(value){
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return parseInt(value);
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}
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},
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numOfWorkers: function(value) {
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return parseInt(value);
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},
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decoder: {
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readers: function(value) {
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if (value === 'ean_extended') {
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return [{
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format: "ean_reader",
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config: {
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supplements: [
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'ean_5_reader', 'ean_2_reader'
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]
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}
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}];
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}
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return [{
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format: value + "_reader",
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config: {}
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}];
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}
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}
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},
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state: {
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inputStream: {
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size: 800
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},
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locator: {
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patchSize: "medium",
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halfSample: false
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},
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numOfWorkers: 1,
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decoder: {
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readers: [{
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format: "code_128_reader",
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config: {}
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}]
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},
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locate: true,
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src: null
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}
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};
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App.init();
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function drawResult(scanner, result) {
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var processingCanvas = scanner.getCanvas(),
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canvas = App.overlay,
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ctx = canvas.getContext("2d");
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canvas.setAttribute('width', processingCanvas.getAttribute('width'));
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canvas.setAttribute('height', processingCanvas.getAttribute('height'));
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if (result) {
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if (result.boxes) {
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ctx.clearRect(0, 0, parseInt(canvas.getAttribute("width")), parseInt(canvas.getAttribute("height")));
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result.boxes.filter(function (box) {
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return box !== result.box;
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}).forEach(function (box) {
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Quagga.ImageDebug.drawPath(box, {x: 0, y: 1}, ctx, {color: "green", lineWidth: 2});
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});
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}
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if (result.box) {
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Quagga.ImageDebug.drawPath(result.box, {x: 0, y: 1}, ctx, {color: "#00F", lineWidth: 2});
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}
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if (result.codeResult && result.codeResult.code) {
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Quagga.ImageDebug.drawPath(result.line, {x: 'x', y: 'y'}, ctx, {color: 'red', lineWidth: 3});
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}
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if (App.state.inputStream.area) {
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var area = calculateRectFromArea(canvas, App.state.inputStream.area);
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drawingCtx.strokeStyle = "#0F0";
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drawingCtx.strokeRect(area.x, area.y, area.width, area.height);
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}
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}
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};
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function addToResults(scanner, result) {
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var code = result.codeResult.code,
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$node,
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canvas = scanner.getCanvas();
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$node = $('<li><div class="thumbnail"><div class="imgWrapper"><img /></div><div class="caption"><h4 class="code"></h4></div></div></li>');
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$node.find("img").attr("src", canvas.toDataURL());
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$node.find("h4.code").html(code);
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$("#result_strip ul.thumbnails").prepend($node);
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}
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});
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@@ -0,0 +1,86 @@
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---
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layout: v1.0.0-beta.1/examples
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title: Demo with file-input
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showInMenu: false
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---
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<section id="container" class="container">
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<h3>Working with file-input</h3>
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<p>This example let's you select an image from your local filesystem.
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There is no server interaction needed as the file is
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simply accessed through the
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<a href="http://www.w3.org/TR/file-upload/">File API</a>.
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<p>This also works great on a wide range of mobile-phones where the
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camera access through <code>getUserMedia</code> is still very
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limited. </p>
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<p>If the default configuration does not suit your use-case, you can
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adjust various parameters of the localization and decoding process.</p>
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<div class="controls">
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<fieldset class="input-group">
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<input type="file" accept="image/*;capture=camera"/>
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<button>Rerun</button>
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</fieldset>
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<fieldset class="reader-config-group">
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<label>
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<span>Barcode-Type</span>
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<select name="decoder_readers">
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<option value="code_128" selected="selected">Code 128</option>
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<option value="code_39">Code 39</option>
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<option value="code_39_vin">Code 39 VIN</option>
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<option value="ean">EAN</option>
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<option value="ean_extended">EAN-extended</option>
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<option value="ean_8">EAN-8</option>
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<option value="upc">UPC</option>
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<option value="upc_e">UPC-E</option>
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<option value="codabar">Codabar</option>
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<option value="i2of5">ITF</option>
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</select>
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</label>
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<label>
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<span>Resolution (long side)</span>
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<select name="input-stream_size">
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<option value="320">320px</option>
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<option value="640">640px</option>
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<option selected="selected" value="800">800px</option>
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<option value="1280">1280px</option>
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<option value="1600">1600px</option>
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<option value="1920">1920px</option>
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</select>
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</label>
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<label>
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<span>Patch-Size</span>
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<select name="locator_patch-size">
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<option value="x-small">x-small</option>
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<option value="small">small</option>
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<option selected="selected" value="medium">medium</option>
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<option value="large">large</option>
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<option value="x-large">x-large</option>
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</select>
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</label>
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<label>
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<span>Half-Sample</span>
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<input type="checkbox" name="locator_half-sample" />
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</label>
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<label>
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<span>Workers</span>
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<select name="numOfWorkers">
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<option value="0">0</option>
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<option value="1" selected="selected">1</option>
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<option value="2">2</option>
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<option value="4">4</option>
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<option value="8">8</option>
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</select>
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</label>
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</fieldset>
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</div>
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<div id="result_strip">
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<ul class="thumbnails"></ul>
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</div>
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<div id="interactive" class="viewport">
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<canvas class="drawing" />
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</div>
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</section>
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<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
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<script src="../js/quagga.min.js" type="text/javascript"></script>
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<script src="file_input.js" type="text/javascript"></script>
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