Preferred way to display charts/plots

I am planning to display ascii-art plots / charts within full screen application. My initial idea was to have Window/BufferControl/Buffer combo where I would simply set contents of the buffer with data I would like to display. However, rendering such content requires knowledge of drawable area dimensions, which to my knowledge, are not accessible directly.
I know there is a create_content method for BufferControl, which is called with height/width values.
With that, does it require that I would need to create a new UI Control, that would create plot content upon call to create_content? Or maybe there's a simpler way to just use generic Window/BufferControl/Buffer combo I don't see yet? Or maybe there exists a different dedicated control that can help me with doing the above?

Thank you for any tips and for creating such a useful library.

Start by reading the Window, BufferControl, and Buffer APIs, focusing on BufferControl.create_content and its height/width arguments. Determine whether existing controls support size-aware chart rendering or whether a dedicated control is needed; done means documenting or implementing a clear supported approach for displaying ASCII plots in a full-screen application.