Hacker News new | ask | show | jobs
by PaulDavisThe1st 861 days ago
> I disagree a lot on HTML here - it's a pretty fantastic way of describing a render and layout tree,

In the context of the discussion, that would imply that "a render and layout tree" is a good way to describe a UI. That too is subject to serious questions.
1 comments
spankalee 861 days ago
Yes, I would claim that. What major, non-game, UI stacks out there aren't structured that way?
link
PaulDavisThe1st 859 days ago
Well, the constraint layout system that Apple introduced (sorry, I am drawing a blank on the name) is sufficiently different that I'd say that although technically you could call it a layout tree, that is really missing the point.

Also, the render tree concept doesn't exist in the internals of GTK (at least; I could speculate about Qt but will not). Rendering is done by invalidating rectangles and then finding intersections with widgets; since there is no z-axis stacking, there's only ever 1 widget to be drawn at a given pixel coordinate.

link