Custom DrawingTool render after async calculation

I’m developing a new DrawingTool which one has to make a long calculation at every chart anchor move. The calculation has 3 steps and after every step I want to rerender the tool. What is the best practice to achive this?

You can only learn by doing. Take a stab at it and then iterate. Alternatively, there’s always Gemini and ChatGPT, they have gotten frighteningly good doing these sort of things.