Reading this back, three things claim something they do not do. `OnResize::Translate` is returned by `TextView::on_resize` under a comment weighing anchored glyphs against reshaping ones, but nothing consumes it: `try_reuse` asks only whether the answer is `Scale`, so a widget saying `Translate` is redrawn. Say so on the variant, since the comment beside it reads as a description of behaviour. `depend_on_size(child, false)` and `depend_on_size(child, true)` are the difference between a hint, which is context-free, and a size the child produced by drawing, which carries every pixel axis the child read. That is the subtlest rule in the file and it was spelled as a bool; give the two cases their names. `draw_started` is the record of what has drawn during the pass under way, and it worked only because `redraw` removes an id before asking about it -- nothing emptied the set, so it accumulated the id of every widget ever drawn, including ones long gone. Empty it with the pass. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
iris
My experimental attempt at a rust ui library (also my first ui library).
It's currently designed around using retained data structures (widgets), rather than diffing generated trees from data like xilem or iced. This is an experiment and I'm not sure if it's a good idea or not.
Examples are in examples, eg. cargo run --example tabs.
Goals, in general order:
- does what I want it to (text, images, video, animations)
- very easy to use ignoring ergonomic ref counting
- reasonably fast / efficient (a lot faster than electron, save battery life, try to beat iced and xilem)
dev details
not targeting web rn cause wanna use actual nice gpu features & entire point of this is to make desktop apps / not need a web browser
general ideas trynna use rn / experiment with:
- retained mode
- specifically designed around wgpu so there's no translation
- postfix functions for most things to prevent unreadable indentation (going very well)
- events can be done directly where you draw the widgets
- almost no macros in user code & actual LSP typechecking (variadic generics if you can hear me please save us)
- relative anchor + absolute offset coord system (+ "rest" / leftover during widget layout)
- single threaded ui & pass context around to make non async usage straightforward (pretty unsure about this)
- widgets store outside of the actual rendering so they can be moved around and swapped easily (unsure about this but seems to work good for now)
under heavy initial development so not gonna try to explain status, maybe check TODO for that; sizable chance it gets a rewrite once I know everything I need and what seems to work best
it's called iris because it's the structure around what you actually want to display and colorful