By this moment I have been developing and fixing bugs of the qooxdoo application for several months. It is rather old framework, but nowadays it still alive, however it is not so popular. Actually it has never been very popular, it is seen when you start google something - the most often result is official documentation and nothing else. It should be noted, the framework documentation is rather good. The qooxdoo has a lot of different widgets and it seems that all your need is already implemented there or it is needed make a tiny modification of existing item to get what you want. I was wonder when I realized that there is no autocomplete combobox widget. Moreover, there is almost nothing about it in the internet. So I had to do it myself.