ComponentState<T extends StatefulComponent> class abstract Components Core State Management

Base class for managing the state of a StatefulComponent.

A ComponentState represents the mutable data and behavior associated with a StatefulComponent instance. The framework will create a ComponentState object when a StatefulComponent is inserted into the component tree, and may call its lifecycle methods during rendering.

Responsibilities:

• Hold and mutate state that affects how the component is built.
• Build and return a tree of child Components via build.
• Notify the framework to rebuild when state changes via setState.

Lifecycle:

• initState is called once when the state object is first created.
• build is called whenever the component needs to render itself.
• setState is used to schedule a rebuild after mutating state.

Constructors

ComponentState.new()

Properties

component ↔ T

The associated StatefulComponent that owns this state.

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

instance ↔ StatefulComponentInstance

The concrete instance for this StatefulComponent in the tree.

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

build() → List<Component>

Describes the component subtree for this state. Called every time the component needs to rebuild.

initState() → void

Called exactly once when the state is initialized. Override to set up state, subscribe to data sources, etc.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

setState(VoidCallback fn) → void

Marks this state as dirty and schedules a rebuild.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited