support right mouse click on single-touch

While multitouch support has advanced with newer versions of ubuntu, usability of singletouch screen has considerably been reduced. Last version of ubuntu on which I could control my PC reasonalbly well with my eGalax touchscreen TFT was Ubuntu 10.10 (!!!) (see also http://ubuntuforums.org/showpost.php?p=10676948&postcount=34).

In all more recent version of ubuntu, it was possible to enable the eGalax touchscreen but it what I've found was not enough to control it. The main showstopper at present is that there is no singletouch 'gesture' for 'right mouse click'.

In ancient times, right mouse click was emulated if you first tap short on the screen and then tap long on the same spot. This worked reasonably well. But I could imagine other possibilities as well (e.g. tap on to one spot).