Pie chart to donut chart

[walter]

I want to draw a ring chart

I think Pie Charts does what you want, except you need to adapt the makeGeo function so that it returns a Geometry that is what you want. The makeAnnularWedge function in Radial Partition Layout does something similar to what you want, although the geometries are centered differently.

Create the semi circle around the node with multiple fill colors, on need

[Mithun] : We want to do this while we are highlighting a node. [Mithun] : Yes, we can have multiple nodes highlighted at a time. [Mithun] : Not when node is selected, when there is some external function calling the highlight. [Mithun] : Yes. [Mithun] : Colors and number of sections will be determined by data property and yes the number of such sections could change per node.