(webi) Pie chart in webi where the names of the label (color) are the names measures ?

[G-Garlatti]

Hi webi folks,

I have this things in my data set (simplified) :

Question	Modality 1	Modality 2	Modality 3	Modality 4	Modality (n)
Q1	10 %	50 %	40 %
Q2	5 %	65 %	20 %	10 %
Q(n)					...

A lot of questions in row and a lot of Modality. Each question have a 100% sum total. And each Modality are  mesure (some aren't used).

I could show an histogram of the result. But I want to have a pie !
1) one pie=one question => that ok with a filter on the question dimension.
2) one measure => ok I do the sum for each mesure so I have 100 %.. cool

3) a dimension to color the pie... here the problem.

 How could I say to webi to divide one measure in segment the pie in color where the color is labeled from the measure name.

I tryed some formula but couldn't find a way out.

Thx in advance.