Enum Presence 

#[non_exhaustive]
pub enum Presence {
    Entering,
    Present,
    Exiting,
    Absent,
}

Lifecycle of a retained element. Exit completes only after all channels settle.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Entering

First mount or re-entry is moving toward the visible target.

Present

Mounted; may still be transitioning between visible targets.

Exiting

Removal requested; the element must remain rendered until settled.

Absent

Exit completed; omit the element from layout, painting, and input.

Trait Implementations

impl Clone for Presence

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Presence

impl Debug for Presence

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

Formats the value using the given formatter.

impl Eq for Presence

impl PartialEq for Presence

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Presence