[GREENFOOT-62] Add code pad functionality

A user requested this. I like the idea, but not sure where it would fit in the UI. Maybe next to the control panel.

Buis, Paul E. wrote:

Greenfoot is really cool! However, I was looking for a feature that I recall seeing with BlueJ that is missing here. I'd love to be able to interactively have expressions evaluated so I can do things like:

wombatList = getWorldObjects(Wombat.class);

wombat0 = wombatList.get(0);

wombat0.move();

interactively rather than going through the process of compiling and reinitializing the world.

I am not so sure about this one. Needs discussion. -mik-

Issue metadata

Issue type: Task
Priority: Medium
Fix versions: 3.0.0