Guy Palmer,

I think that you'll be much better off creating your widgets on demand. Currently, you are building a huge name space and rendering thousands of images that are not likely to be used.

While it will be more expensive to build a given widget dynamically than to flip visibility, it is much cheaper to build a few on demand than building thousands on speculation.

You may be able to define a small set of prototype widgets. This might allow you do develop "skins" by re-defining the prototypes.