Struggling to use Cordova barcodescanner plugin - eclipse

Question

I'm trying to create an application with Cordova (developing in eclipse, using JBoss Hybrid Mobile Tools + CordovaSim).
I have inspired the code snippet that's giving me problems on this example.
The error I get is:
!JavaScript ERROR: TypeError: 'undefined' is not an object (evaluating 'cordova.plugins.barcodeScanner') on line 6 for http://localhost:54726/js/QRScan.js
QRScan.js only contains the following code (so basically as in the example):
var scanBut = document.getElementById('QRScanButton');
scanBut.onclick = quickScan();
function quickScan(){
cordova.plugins.barcodeScanner.scan(
function (result) {
var s = "Result: " + result.text + "<br/>" +
"Format: " + result.format + "<br/>" +
"Cancelled: " + result.cancelled;
resultDiv.innerHTML = s;
},
function (error) {
alert("Scanning failed: " + error);
}
);
}
And I made sure my index.html contains the following line at the appropriate spot:
<script type="text/javascript" src="cordova.js"></script>
Finally my xml file should be configured correctly, I imported the correct plugin, the file looks like:
<?xml version="1.0" encoding="UTF-8"?>
<widget xmlns="http://www.w3.org/ns/widgets" xmlns:gap="http://phonegap.com/ns/1.0"
id="csam.test" version="1.0.0">
<name>csam test</name>
<description>
A sample Apache Cordova application that responds to the
deviceready
event.
</description>
<author href="http://www.eclipse.org/thym" email="thym-dev#eclipse.org">
Eclipse.org -
Thym
</author>
<content src="index.html" />
<access origin="*" />
<preference name="fullscreen" value="true" />
<preference name="webviewbounce" value="true" />
<feature name="App">
<param name="android-package" value="org.apache.cordova.App" />
</feature>
<feature name="BarcodeScanner">
<param name="android-package" value="com.phonegap.plugins.barcodescanner.BarcodeScanner" />
<param name="ios-package" value="CDVBarcodeScanner" />
<param name="wp-package" value="BarcodeScanner" />
<param name="id" value="cordova-plugin-barcodescanner" />
</feature>
<engine name="android" version="4.0.1" />
</widget>

Answer 1

Plugins must wait for the deviceready event for use. Here is the piece of code from the demo which waits for deviceready added back in.
document.addEventListener("deviceready", init, false);
function init() {
document.querySelector("#startScan").addEventListener("touchend", startScan, false);
var scanBut = document.getElementById('QRScanButton');
scanBut.onclick = quickScan();
}