EmpireNullableIntProperty class Null safety

An EmpireProperty with similar characteristics of dart int objects

The underlying value can be null.

You can perform most arithmetic operator on this (+, -, /, *). If the underlying value of this is null and an arithmetic operator is called on this, it will throw a EmpirePropertyNullValueException.

Unary operators are not supported (++, --, +=, -=, etc)

You can easily check for null by accessing the isNull or isNotNull properties.

When the value of this changes, it will send a EmpireStateChanged event by default. This includes automatically triggering a UI rebuild.

Example

late final EmpireNullableIntProperty age;

age = createNullableIntProperty();

if (age.isNull)
{
  print("I'm Null");
}

Other Usages Examples


late final EmpireNullableIntProperty age;

age = createNullableIntProperty();

print('${age + 5}'); //throws EmpireNullValueException because no value has been set yet.

age(10)

print('${age - 5}'); //prints 5
Inheritance

Constructors

EmpireNullableIntProperty(int? value, EmpireViewModel viewModel, {String? propertyName})

Properties

hashCode → int
The hash code for this object.
read-only, inherited
isEven → bool
Returns true if the int value is even.
read-only
isNegative → bool
Whether this number is negative.
read-only
isNotNull → bool
read-only, inherited
isNull → bool
read-only, inherited
isOdd → bool
Returns true if the int value is odd
read-only
originalValue → int?
read-only, inherited
propertyName ↔ String?
read / write, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
value → int?
read-only, inherited

Methods

abs() → int?
Returns the absolute value of this integer.
call(int? value, {bool notifyChange = true}) → void
inherited
equals(dynamic other) → bool
Checks if other is equal to the value of this EmpireProperty
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
reset({bool notifyChange = true}) → void
Resets the value to what it was initialized with.
inherited
set(int? value, {bool notifyChange = true}) → int?
Updates the property value. Notifies any listeners to the change
inherited
setOriginalValueToCurrent() → void
Updates the original value to what the current value of this property is.
inherited
toDouble() → double?
The int value as a double
toString() → String
A string representation of this object.
inherited

Operators

operator %(dynamic other) → int
operator *(dynamic other) → int
operator +(dynamic other) → int
operator -(dynamic other) → int
operator /(dynamic other) → int
operator ==(dynamic other) → bool
The equality operator.
inherited