Canvas edges should grow/shrink

Description of Feature:
In order to simulate changes in pressure, the canvas should have the ability 
(perhaps via a dial or scrollbar) to grow or shrink during the simulation.

Do you know how this issue might be addressed?
This may involve modifying the physics engine... currently, the boundaries for 
the canvas (the canvas edge bodies) have static location set at the beginning 
of the sim.  It may simply involve moving these bodies further in, or further 
out.
We will have to consider whether we should have a visual cue, like a "plunger" 
to indicate that the canvas is growing and shrinking.

Original issue reported on code.google.com by allan.be...@gmail.com on 8 Feb 2011 at 5:06

aakash58 / connchem

Canvas edges should grow/shrink #28