4 commits

Author	SHA1	Message	Date
Paul Davis	52718b3411	some initial bits of work on canvas allocation	2017-02-01 21:58:20 +01:00
Paul Davis	4fa4b9a135	remove use of boost::optional to define "undefined" Canvas::Rect, and use Rect::empty instead. ... This commit includes Rect::operator bool() which might be a candidate for removal in a future commit, in an attempt to make the meaning clearer	2017-01-19 20:54:54 +01:00
Paul Davis	fccd0da9c6	bug fixes for Canvas::Box	2016-09-27 14:59:32 -05:00
Paul Davis	85c1523611	add new Box container for Canvas. ... API subject to change and improvement	2016-09-27 14:59:32 -05:00