Hi Veronica,

How can I try MOTreeMapLayout?  I only found a test but not an official example.
In one of my trees I just changed the layout to use this one. But when drawing there is an error because a  point has a fraction as one of its coordinates (integer@fraction).

I fixed MOTreeMapLayout and added a test. However, I am not sure the result is what one would expect. 
Here is the screenshot:

If having a tree map layout is important for you, than I will work on it with a student in December. Let me know.

Cheers,
Alexandre 

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Alexandre Bergel  http://www.bergel.eu
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