Trait relm::Widget

pub trait Widget<MSG: Clone + DisplayVariant> where Self: Sized, Self::Container: Clone + IsA<Widget> {
    type Container;
    type Model;
    fn container(&self) -> &Self::Container;
    fn model() -> Self::Model;
    fn update(&mut self, event: MSG, model: &mut Self::Model);
    fn view(relm: RemoteRelm<MSG>, model: &Self::Model) -> Self;

    fn subscriptions(_relm: &Relm<MSG>) { ... }
    fn update_command(_relm: &Relm<MSG>, _event: MSG, _model: &mut Self::Model) { ... }
}

Trait to implement to manage widget's events.

Associated Types

type Container

The type of the containing widget.

type Model

The type of the model.

Required Methods

fn container(&self) -> &Self::Container

Get the containing widget, i.e. the parent widget of the view.

fn model() -> Self::Model

Create the initial model.

fn update(&mut self, event: MSG, model: &mut Self::Model)

Method called when a message is received from an event.

Note

This method is called in the GTK+ thread, so that you can update widgets.

fn view(relm: RemoteRelm<MSG>, model: &Self::Model) -> Self

Create the initial view.

Provided Methods

fn subscriptions(_relm: &Relm<MSG>)

Connect the subscriptions. Subscriptions are Future/Stream that are spawn when the widget is created.

Note

This method is called in the tokio thread, so that you can spawn Futures and Streams.

fn update_command(_relm: &Relm<MSG>, _event: MSG, _model: &mut Self::Model)

Connect Futures or Streams when receiving an event.

Warning

This method is executed in the tokio thread: hence, you must spawn any futures in this method, not in Widget::update().

Implementors