gui - Super minimal, rock-solid foundation for concurrent GUI in Go.

	Commit message (Collapse)	Author	Age	Files	Lines
*	lay/strain: replace Solver mutex with channels	Sam Anthony	4 days	1	-10/+75
\| \| \| \| \| \| \| \| \|	Partially reverts 483236742ddcd7883b5f9cff92244129274aa79c. Solver still closes itself automatically, but reverted to using request/reply channels. Mutex was becoming annoying to manage, as expected. TODO: TestRows fails intermittently due to constraint channels not being flushed when Solve() is called.
*	lay/strain: add default constraints to Solver	Sam Anthony	12 days	1	-11/+25
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*	lay/strain: use synctest	Sam Anthony	12 days	1	-33/+37
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*	lay/strain: simplify Solver internal synchronization	Sam Anthony	12 days	1	-9/+51
\| \| \| \| \| \| \| \|	Replaced the AddConstraint() and Solve() methods' request/reply channels, used a mutex instread. Solver now closes the fieldConstrs channel automatically; removed the Close() method. Generally tidied up.
*	lay/strain: represent rectangles as (origin, size)	Sam Anthony	12 days	1	-0/+105