Provide events on Drawables

[grg]

It would be useful for some GUIs to be able to attach event listeners to Drawables. I'd suggest using the standard MouseListener and MouseMotionListener interfaces, although it may be appropriate to provide a custom set of events.

[grg]

Some other useful events could be:

• drawableMoved
• linkAdded
• linkRemoved

[dound]

This is a good suggestion. linkAdded/Removed() may not make sense for all Drawables -- we could either ignore this (and thus some Drawables would never fire this event) or we could have sub-interfaces with additional methods like these.