[Cuis-dev] minimum requirements for a BoxMorph subclass

[Mark Volkmann]

I'm trying to understand what is required to create a subclass of BoxMorph.
I know I need to implement the drawOn: instance method. And I believe that
depending on how I implement that, I need to implement the
requiresVectorCanvas method to return true.

Is anything else required? I think more must be required, because I can't
get a basic example to work doing only those things.

I'd especially appreciate it if someone can tell me how I could have
determined the answer on my own by looking at the source. I tried to do
that and failed.

-- 
R. Mark Volkmann
Object Computing, Inc.
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