Enum PresentationState

#[non_exhaustive]
pub enum PresentationState {
    Declared,
    CreationAllowed,
    Ready,
    Suspended,
    Unavailable(PresentationUnavailableReason),
    Destroyed,
}

Provider-neutral lifecycle state for a logical window presentation.

This enum models host/surface availability without owning a native window or GPU resource. It is non-exhaustive for downstream consumers.

Examples

use ailloli_ui_runtime::app::{PresentationState, PresentationUnavailableReason};
assert_ne!(PresentationState::Declared, PresentationState::Ready);
assert_eq!(PresentationState::Unavailable(PresentationUnavailableReason::ZeroExtent), PresentationState::Unavailable(PresentationUnavailableReason::ZeroExtent));

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.

Declared

Logical window exists but creation has not been authorized.

CreationAllowed

Host may create/attach a native presentation.

Ready

Native presentation is attached and accepts this generation’s events.

Suspended

Presentation is detached during host suspension.

Unavailable(PresentationUnavailableReason)

Presentation cannot currently be used for the recorded reason.

Destroyed

Terminal lifecycle state; only another Destroy event is accepted.

Trait Implementations

impl Clone for PresentationState

fn clone(&self) -> PresentationState

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PresentationState

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

Formats the value using the given formatter.

impl PartialEq for PresentationState

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for PresentationState

impl Eq for PresentationState

impl StructuralPartialEq for PresentationState