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Same points as before, how does a user come up with the x,y points to place the components?
Is there a tool to compute them and store them in the code.
I hope it doesn't have to be done manually.

It'd be a bit more useful if you added a main() method that would use the above classes and methods and demo how to use them.
It could be commented out when moving to production.

What are all the hardcoded x,y values? Is there a preprocessor that generates them? I hope you don't have to manually compute them.
What happens if you need to insert a line of components at the...