With Windows set to show no animations (Settings ▸ Accessibility ▸ Visual
effects ▸ Animation effects), dialogs and menus still faded in and wheel
input glided. All of that motion is egui's default behaviour, and nothing
asked the operating system.
- crates/ui-egui/src/animation.rs: AnimationPref (System, On, Off). Off sets
egui's animation_time to 0 and scroll_animation to none (window, menu,
tooltip and popup fades, collapsing sections, scroll bars, scroll-to
glides), hands each wheel notch to scroll areas whole, and lets
Cmd/Ctrl+wheel zoom reach its zoom in one step.
- System, the default, follows the OS live: UISettings::AnimationsEnabled on
Windows, NSWorkspace's Reduce motion on macOS, the XDG Desktop Portal's
reduced-motion (then GNOME's enable-animations) on Linux and the BSDs,
prefers-reduced-motion on the web.
- View ▸ Accessibility ▸ Animation Effects ▸ Use System Setting / On / Off,
the same choice in Options ▸ Display, and `ui.animations`, `options` and
`ui.set` {"animations"}; `ui.inspect` reports whether animations show.
Drafting behaviour is untouched: tracking's acquisition pause, the
time-sensitive right-click, previews, the caret blink, realtime pan and
zoom. Plain wheel zoom already moved a whole notch per frame (#692).
macOS and Linux are compile-checked (clippy -D warnings for
aarch64-apple-darwin and x86_64-unknown-linux-gnu), not run.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
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