PreferenceDelegate

open class PreferenceDelegate<T>(getValue: () -> T?, getEffectiveValue: () -> T, getIsEffective: () -> Boolean, updateValue: (T?) -> Unit) : Preference<T>

Constructors

constructor(getValue: () -> T?, getEffectiveValue: () -> T, getIsEffective: () -> Boolean, updateValue: (T?) -> Unit)

open override val effectiveValue: T

The value that will be effectively used by the navigator if preferences are submitted as they are.

open override val isEffective: Boolean

If this preference will be effectively used by the navigator if preferences are submitted as they are.

open override val value: T?

The current value of the preference.

Unset the preference.

Returns a new preference with its boolean value flipped.

fun <T, V> Preference<T>.map(from: (T) -> V, to: (V) -> T): Preference<V>

Creates a new Preference object wrapping the receiver and converting its value from and to the target type V.

open override fun set(value: T?)

Set the preference to value. A null value means unsetting the preference.

Toggle the preference value. A default value is taken as the initial one if the preference is currently unset.

Creates a new EnumPreference object wrapping the receiver with the provided supportedValues.