Struct MotionTreeState 

pub struct MotionTreeState<K, V> { /* private fields */ }

Native owner for a portable variant tree; shares the graph’s explicit clock contract.

Implementations

impl<K: PartialEq, V: PartialEq> MotionTreeState<K, V>

pub fn new(tree: MotionTree<K, V>) -> Self

Retains a prepared node tree.

pub fn now(&self, cx: &App) -> Duration

Native control timestamp.

pub fn frame(&mut self, window: &mut Window, cx: &App)

Samples parent/child gates and schedules pending trajectories/delays.

pub fn get(&self, key: &K) -> Option<Frame>

Retrieves this backend’s native frame type.

Methods from Deref<Target = MotionTree<K, V>>

pub fn add(&mut self, declaration: MotionNode<K, V>) -> Result<(), TreeError>

Adds a unique node. Parents must already exist; invalid additions are transactional.

pub fn set_variant( &mut self, variant: &V, now: Duration, reduced: bool, ) -> Result<(), TreeError>

Propagates a variant through inheriting roots/descendants. A non-inheriting node blocks propagation through its subtree. New variants interrupt smoothly.

pub fn set_node_variant( &mut self, key: &K, variant: &V, now: Duration, reduced: bool, ) -> Result<(), TreeError>

Explicitly changes one subtree, including its root even when inheritance is disabled.

pub fn set_motion( &mut self, key: &K, motion: Motion, now: Duration, reduced: bool, ) -> Result<(), TreeError>

Retargets one node from application-computed data while retaining its parent/child timing policy. Other nodes keep their current declarations. Returns Identity without mutation for an unknown key.

pub fn sample(&mut self, now: Duration, reduced: bool)

Advances one monotonic frame. Reduced motion bypasses gates and delays.

pub fn get(&self, key: &K) -> Option<Frame>

Current node presentation, for ordinary native Frame application.

pub fn is_mounted(&self, key: &K) -> bool

Keeps an exiting root mounted until its entire nested subtree exits. Once false, the host may release that view/entity and restore focus.

pub fn is_animating(&self) -> bool

Whether a trajectory, dependent child, or stagger delay is pending.

pub fn completion(&mut self) -> Completion

Observes the current change; replacing it or dropping the tree cancels.

Trait Implementations

impl<K: Debug, V: Debug> Debug for MotionTreeState<K, V>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<K, V> Deref for MotionTreeState<K, V>

type Target = MotionTree<K, V>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<K, V> DerefMut for MotionTreeState<K, V>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.