[by magnalox]

Upon request I released a new version V1.1 which works with Ext V4.1 (and probably not with older versions).

All files:
http://code.google.com/p/qrext/source/browse/

Demopage:...

[by magnalox]

It's on googlecode in qrextV1.0.zip
Edit: on googlecode, not github

[by magnalox]

I considered using a Component in the beginning and found out that most of my use cases were Panels anyway. I admit that it can lead to one superflous nested div in the domtree, but given that there...

[by magnalox]

An extension that creates QR codes is here
http://code.google.com/p/qrext/downloads/list

Derived from Ext.panel.Panel, so you can easily use it in panels, windows, tabs etc....