Struct AnimationManager 

pub struct AnimationManager<K: Eq + Hash + Copy> { /* private fields */ }

Central, Qt-style animation driver, generic over any hashable key type so it can be reused outside of any specific GUI framework. Callers never own a timer themselves; they only report their current target value and the manager owns the entire lifecycle (starting, easing, retargeting, finishing).

Implementations

impl<K: Eq + Hash + Copy> AnimationManager<K>

pub fn new() -> Self

Creates an empty manager with no active or resting animations.

pub fn set_target( &mut self, key: K, target: AnimValue, transition: Option<Transition>, )

pub fn set_color_target( &mut self, key: K, target: AnimValue, transition: Option<Transition>, )

Like set_target, but blends the transition using premultiplied alpha - use this when target packs an RGBA color, so a transparent endpoint’s meaningless RGB doesn’t leak into the blend as a visible flash partway through the fade.

pub fn tick(&mut self, dt: Duration)

Advances every active transition by one frame’s delta time. Call exactly once per frame, before layout/paint.

pub fn value(&self, key: K) -> Option<AnimValue>

Current (possibly mid-transition) value for key, or None once the transition has settled - callers should fall back to their own resolved target value in that case.

pub fn active_keys(&self) -> impl Iterator<Item = &K>

Iterates the keys of every animation currently mid-transition, letting callers check what is animating instead of only whether anything is - e.g. to skip layout work for animations that only affect paint (colors, opacity) and not the box model.

pub fn is_animating(&self) -> bool

Whether any animation is currently in flight across all keys. Useful to decide whether the render loop needs to keep polling for frames.

Trait Implementations

impl<K: Eq + Hash + Copy> Default for AnimationManager<K>

fn default() -> Self

Returns the “default value” for a type.