iris-aiandiris
c8ac669f95
Small, and disjoint from #12 — this touches `task.rs`, `harness.rs` and `render_state.rs`, none of which #12 goes near. `Tasks` held an `Arc<Window>` only to call `request_redraw` when a task finished, which made the task queue, and so `DefaultRsc`, impossible to build without a window. It now takes an `Arc<dyn WakeTaskQueue>`, and `Window` implements it. Waking also moves from *the task ended* to *an update was sent*, which is when there is actually something for the host to apply. A task that keeps running after sending one no longer holds it until it finishes, and a task that sends none no longer asks for a frame nothing needs. `iris::harness` is what that buys. `UiRenderState` already does layout, hit testing and primitive building with no surface, so a test can build a tree, run frames, move a pointer and read back where widgets landed. `tests/harness.rs` covers span layout, resize relayout, press routing, hover start and end, wheel scrolling with its clamp, and a task update reaching the tree. None of them could be written before, since the only way into layout was a window. It does not draw. A claim about pixels still needs a real surface — I checked this one against the rig rather than asserting it: `examples/task` under headless sway, centre pixel `ff0000` before the click and `0000ff` after, so the windowed path still applies task updates under the new wake. The only core change is `UiRenderState::output_size()`, so that a host reading back the size it set does not have to keep a second copy. --------- Co-authored-by: iris <2+iris@noreply.localhost> Reviewed-on: #15 Reviewed-by: iris <2+iris@noreply.localhost> Co-authored-by: AIris <4+iris-ai@noreply.localhost>
27 lines
818 B
Rust
27 lines
818 B
Rust
//! Scrolling moves content and stops at its ends.
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use iris::harness::{Harness, assert_corners};
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use iris::prelude::*;
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#[test]
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fn a_wheel_scrolls_the_content_and_stops_at_its_end() {
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let mut h = Harness::new((400, 200));
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// Twice the window's height, so there is 200 to scroll.
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let top = rect(Color::RED).height(200).add(&mut h.rsc);
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let bottom = rect(Color::BLUE).height(200).add(&mut h.rsc);
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h.set_root((top, bottom).span(Dir::DOWN).scrollable());
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h.move_to((200, 100));
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// `Scroll` starts snapped to the end.
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assert_corners!(h, top, (0, -200), (400, 0));
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// The handler scales a wheel line by 50.
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h.scroll((0, 1));
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h.frame();
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assert_corners!(h, top, (0, -150), (400, 50));
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h.scroll((0, 10));
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h.frame();
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assert_corners!(h, top, (0, 0), (400, 200));
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}
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