iris
f5b88932b4
`mov` accumulates a delta onto the slot and `reposition` overwrote it, and both legitimately land on one widget in one frame: `List::place`'s Bottom-known branch offers a row a same-size box that has moved (`mov`), then corrects the placement inside it when the row's cached height no longer matches what the row reports (`reposition`). That is what a wrapped transcript row hit, and what the `move_applied == ZERO` debug assert was standing in for -- an assert against a case that happens is not a guarantee, it is a crash. The slot means `move_applied + repositioned` now, both halves recorded on `ActiveData`, so `reposition` adds the move rather than dropping it and stays idempotent. The assert it replaces is a `debug_assert_eq!` that the slot still holds that sum on entry -- i.e. that nothing but those two ever wrote it. Test: `a_widget_moved_by_its_parent_and_then_placed_inside_it_lands_at_the_placement`, which draws the child at the offered position (-100px) rather than the placement (100px) without the fix. Verified against the `.wrap(true)` repro from docs/IRIS_TODO.md (draws correctly, no panic) and an emulator bench run with assertions live.
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