Thanks Valts for your answer !
That's good to know, and will be very nice.
You're right, I was trying to get advantage of your very nice dynamic layout algorithm to fix some nodes, and then tryied to organize the rest of the nodes radially by switching the layout mode. But after some hours more coding, I understood the radial layout can't be working that way.
An other idea, maybe for a next release : as Zoomcharts has implemented 2 finger rotation for touchscreen devices, why not giving us the ability to specify it with some updateSettings method or else ?
It would be really nice to rotate the nodes of my radial layout to put the latest clicked node's children on a left-to-right orientation (I am displaying a related web page there with additional data there).
Thanks anyway for the answers and te help!