EmpireProperty<T> class

Contains any object that will notify any listeners when its value is changed.

Usually these are properties that are bound to a UI Widget so when the value changes, the UI is updated.

You optionally set the propertyName argument to conditionally perform logic when a specific property changes. You can access the propertyName in any event listener registered with the EmpireViewModel.addOnStateChangedListener function via the propertyName property on an EmpireStateChanged object.

If T is of type List or Map, use either EmpireListProperty or EmpireMapProperty. Not doing so will prevent the reset function from performing as expected.

An EmpireProperty is callable. Calling the property updates the value. However, there are two ways to update the value of an EmpireProperty:

Using set:

//initialize the property value to zero.
final age = createProperty<int>(0);

//update the property value to five.
age.set(5);

Calling the property:

//initialize the property value to zero.
final age = createProperty<int>(0);

//update the property value to five.
age(5);

Implemented types

Implementers

Constructors

hashCode → int: The hash code for this object.
no setteroverride
isNotNull → bool: Returns true if the value of this is not null.
no setter
isNull → bool: Returns true if the value of this is null.
no setter
originalValue → T: no setter
propertyName ↔ String?: getter/setter pair
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
value → T: no setteroverride
viewModel → EmpireViewModel: Returns the instance of the EmpireViewModel this property is associated with.
no setter

call(T value, {bool notifyChange = true, bool setAsOriginal = false}) → void: Updates the underlying value for this EmpireProperty.
equals(dynamic other) → bool: Checks if other is equal to the value of this EmpireProperty
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
reset({bool notifyChange = true}) → void: Resets the value to the originalValue.
set(T value, {bool notifyChange = true, bool setAsOriginal = false}) → T: Updates the property value. Notifies any listeners to the change
setOriginalValueToCurrent() → void: Updates the original value to what the current value of this property is.
setViewModel(EmpireViewModel viewModel) → void: Links this EmpireProperty instance with an EmpireViewModel.
toString() → String: A string representation of this object.
override