91 lines
2.5 KiB
JavaScript
91 lines
2.5 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/qrcode/barcodereader.js
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type: application/javascript
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module-type: widget
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barcodereader widget for reading barcodes
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Widget = require("$:/core/modules/widgets/widget.js").widget;
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var nextID = 0;
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var BarCodeReaderWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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/*
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Inherit from the base widget class
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*/
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BarCodeReaderWidget.prototype = new Widget();
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/*
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Render this widget into the DOM
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*/
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BarCodeReaderWidget.prototype.render = function(parent,nextSibling) {
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var self = this;
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this.parentDomNode = parent;
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this.computeAttributes();
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// Make the child widgets
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this.makeChildWidgets();
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// Generate an ID for this element
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var id = "capture-widget-internal-" + nextID;
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nextID += 1;
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// Create the DOM node and render children
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var domNode = this.document.createElement("div");
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domNode.className = "tc-readcode-widget";
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domNode.setAttribute("width","300px");
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domNode.setAttribute("height","300px");
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domNode.id = id;
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parent.insertBefore(domNode,nextSibling);
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this.renderChildren(domNode,null);
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this.domNodes.push(domNode);
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// Setup the qrcode library
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if($tw.browser) {
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var __Html5QrcodeLibrary__ = require("$:/plugins/tiddlywiki/qrcode/html5-qrcode/html5-qrcode.js").__Html5QrcodeLibrary__;
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function onScanSuccess(decodedText, decodedResult) {
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self.invokeActionString(self.getAttribute("actionsSuccess",""),self,{},{
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format: decodedResult.result.format.formatName,
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text: decodedText
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});
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console.log("Scan result",decodedResult,decodedText);
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}
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function onScanFailure(errorMessage) {
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self.invokeActionString(self.getAttribute("actionsFailure",""),self,{},{
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error: errorMessage
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});
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console.log("Scan error",errorMessage);
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}
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var html5QrcodeScanner = new __Html5QrcodeLibrary__.Html5QrcodeScanner(
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id,
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{
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fps: 10,
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qrbox: 250
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}
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);
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html5QrcodeScanner.render(onScanSuccess,onScanFailure);
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}
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};
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/*
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Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
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*/
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BarCodeReaderWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes(),
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hasChangedAttributes = $tw.utils.count(changedAttributes) > 0;
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if(hasChangedAttributes) {
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return this.refreshSelf();
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}
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return this.refreshChildren(changedTiddlers) || hasChangedAttributes;
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};
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exports.barcodereader = BarCodeReaderWidget;
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})();
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