Delegates
Functions
notNull
Returns a property delegate for a read/write property with a non-
null
value that is initialized not during
object construction time but at a later time. Trying to read the property before the initial value has been
assigned results in an exception.
fun
<
T
:
Any
>
notNull
(
)
:
ReadWriteProperty
<
Any
?
,
T
>
observable
Returns a property delegate for a read/write property that calls a specified callback function when changed.
fun
<
T
>
observable
(
initialValue
:
T
,
onChange
:
(
property
:
KProperty
<
*
>
,
oldValue
:
T
,
newValue
:
T
)
->
Unit
)
:
ReadWriteProperty
<
Any
?
,
T
>
vetoable
Returns a property delegate for a read/write property that calls a specified callback function when changed, allowing the callback to veto the modification.
fun
<
T
>
vetoable
(
initialValue
:
T
,
onChange
:
(
property
:
KProperty
<
*
>
,
oldValue
:
T
,
newValue
:
T
)
->
Boolean
)
:
ReadWriteProperty
<
Any
?
,
T
>