litho-core/com.facebook.litho.animation/EnterExitState

EnterExitState

enum EnterExitState : Enum<EnterExitState>

The visibility lifecycle states for enter/exit transitions, shared by the animated container APIs.

Using three states instead of a Boolean lets enter and exit specify independent "invisible" values for the same property (e.g. fadeIn(initialAlpha = 0.2f) + fadeOut(targetAlpha = 0.5f)): BeforeEnter and AfterExit occupy separate slots in the per-state value mapping, so they never conflict. Modeled after Compose's EnterExitState.

Entries

BeforeEnter

Content is about to enter — not yet visible.

Visible

Content is fully visible.

AfterExit

Content has exited — no longer visible.

Properties

entries

val entries: EnumEntries<EnterExitState>

Returns a representation of an immutable list of all enum entries, in the order they're declared.

name

val name: String

ordinal

val ordinal: Int

Functions

valueOf

fun valueOf(value: String): EnterExitState

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

values

fun values(): Array<EnterExitState>

Returns an array containing the constants of this enum type, in the order they're declared.