I got the breakdown of control.cpp done. This is much more manageable now.

I ran into an issue with root menu item titles. In Kaleidoscope, the titles overlap by 1 pixel, by means of setting the left bound 1 pixel to the left of the default bounding box. When I attempt to do this in a theme, the extra pixel does not draw on the screen, nor will it draw if I attempt hanging off from the right side. So there's a little issue there, maybe something in the 'tinf' resource will help but I doubt it. I'll just play with it and see what happens.

I found something interesting in the Hi-Tech checkbox layo - they used a NULL type image to make the checkbox redraw, so maybe I'll try that.