iris
3a74a04a5b
`WakeTaskQueue` becomes `TaskQueue`, which carries the update itself. Delivery and waking are then one act: the winit host sends it through the `EventLoopProxy` as a `DefaultEvent::Update`, so there is no channel beside the loop and nothing has to claim a redraw is needed in order to be looked at. `Window::request_redraw` is gone from this path; `event` applies the update and then asks the tree whether anything became dirty, which is the same question `window_event` already ended with -- now `schedule_redraw`, called from both. The loop's message type is `DefaultEvent<State>`, so `Proxy` becomes a wrapper that takes the application's own `Event` and requires it to be `Send`, since it now crosses to the task thread by that route. The harness supplies a channel-backed queue, which is what lets a test hold updates until it asks for them. Tests split by subject -- layout, pointer, scroll, tasks -- with the region helper in `tests/common`.
30 lines
816 B
Rust
30 lines
816 B
Rust
//! Scrolling moves content and stops at its ends.
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mod common;
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use common::corners;
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use iris::harness::Harness;
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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_eq!(corners(&h, &top).1, -200.0);
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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_eq!(corners(&h, &top).1, -150.0);
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h.scroll((0, 10));
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h.frame();
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assert_eq!(corners(&h, &top).1, 0.0);
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}
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