Advanced Qt Widget and Fourier Noise

Hi everyone what’s up?
I just wanted to share a tool I have been working lately.
The tool is based on fourier series to produce a noise , then I created a custom qt widget
in order to being able to implement a 2D graph and plotting the data I needed to see.
Here is a screenshot of the demo

And here you guys can find the tool in action with a demo and a detailed
description.
http://www.marcogiordanotd.com/blog/scripting/fourier-noise-plotwidget

Comment and critiques are more then welcome
Cheers