Charts library: Pie Charts

[positrom2]

I am trying to figure out from the charts framework how to draw the most simple pie like that in the image. But I cannot find out where to enter the parameters (the angles of the two boundary lines for instance).
Thanks for a hint.
Regards, positrom2

 

[positrom2]

Solved

Hi,
more or less by trial and error I found out how to manipulate the piecharts from the charts framework.
Thanks, positrom2