svgui: revision graph

graph

less more | rev 1357: (0) -1000 -300 -100 -30 -10 -4 +4 +10 +30 +100 tip

Rework cacheing logic to reduce the number of reallocations and be more correct about the repaint areas. I don't expect the difference to be really noticeable but in theory performance should be a little better...2018-10-11, by Chris Cannam
Fix ugly text positioning/drawing on osx2018-10-11, by Chris Cannam
Remove some debug bits2018-10-10, by Chris Cannam
Use zoom constraints more consistently, including the new RelativelyFine one2018-10-10, by Chris Cannam

less more | rev 1357: (0) -1000 -300 -100 -30 -10 -4 +4 +10 +30 +100 tip