I've updated the original article with a video capture of the widget running using the same code on Linux. I didn't test this particular project on Linux previous to this my original post. I copied over the project, built it without modifying a thing, and it just worked. See for yourself in the video at the project page (the 2nd video was captured on Linux).
http://www.getlazarus.org/forums/viewtopic.php?f=18&t=40 A note on my Linux computer, it's a 2007 laptop (that's old) with a Core 2 Duo T9800 CPU, GeForce 8600M GT video card, and 4GB of RAM. It's running Ubuntu 14.04 64bit. Hopefully this gives you people some perspective on hardware/performance. Also, the screen capture imposes some limits on performance when running overlay windows, but you'd never know that judging by the video capture I posted.
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