Trait StateHandler 

pub trait StateHandler: Sized {
    type Model: Clone;
    type Message;
    type Input;
    type Output;

    // Required methods
    fn new(_link: HandlerLink<Self>) -> Self;
    fn state(&mut self) -> &mut Rc<Self::Model>;

    // Provided methods
    fn changed(&mut self) { ... }
    fn update(&mut self, _msg: Self::Message) -> Changed { ... }
    fn handle_input(&mut self, msg: Self::Input, _who: HandlerId) -> Changed { ... }
}

Determines how state should be created, modified, and shared.

Required Associated Types

type Model: Clone

type Message

type Input

type Output

Required Methods

fn new(_link: HandlerLink<Self>) -> Self

Create new state.

fn state(&mut self) -> &mut Rc<Self::Model>

Return a reference to current state.

Provided Methods

fn changed(&mut self)

Called after state is changed.

fn update(&mut self, _msg: Self::Message) -> Changed

Receive messages from components.

fn handle_input(&mut self, msg: Self::Input, _who: HandlerId) -> Changed

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T> StateHandler for SharedHandler<T>

where T: Clone + Default,

type Model = T

type Message = ()

type Input = ()

type Output = ()

impl<T> StateHandler for StorageHandler<T>

where T: Default + Clone + Storable,

type Model = T

type Message = ()

type Input = ()

type Output = ()