I looked in the code and discovered that the issue does not have to do with iPad. It has to do with CODAP running in the Safari browser. There was a time when Safari would not allow CODAP to transfer data to the Draw Tool plugin for security reasons and that was why we disabled the menu item. (The iPad uses the Safari browser, of course, or, more specifically, the underlying WebKit technology.)
But I just discovered that if I enable the menu item, it now appears that the transfer works both in desktop safari and on the iPad! But with a bug, namely that you have to resize the Draw Tool component to actually see the transferred image. So, bottom line, I’ll enable the menu item and see about fixing the bug.
Thanks for asking about this and pushing me to investigate further.
Bill