[cairo] How does one Normailze the Mouse Coordinates to the DrawingArea Box? [ Got it ]

[Allen]

Hey all,

I just answered my own questions while playing around w/the 
user_to_device() space method.  Boy, this is cool.

Anywhere we can post code so that others may learn from our 
discoveries?  & Have folks on the list notified of those new discoveries?

Allen wrote:
> Hi all,
>
> does anyone know how to normalize the mouse coordinates to be between 
> 0.0 ~ 1.0 within a particular DrawingArea?
>
> I've just learned how to use the "scale" method for a cairo context but 
> my mouse positions are coming in as Pixel positions and I've No idea how 
> to tell if those positions are w/in the Drawing Area let alone how to 
> normalize them to ONLY the drawing area.
>
> Thank you for the help ahead of time!
>
> --Allen
>
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