Trait Middleware

pub trait Middleware<'a, Control> {
    type Event;
    type EventContext;
    type Surface;
    type Init;
    type Context;
    type RenderTarget;

    // Required methods
    fn init(&'a mut self, control: &'a mut Control) -> Self::Init;
    fn update(
        &'a mut self,
        control: &'a mut Control,
        delta: Duration,
    ) -> Self::Context;
    fn handle_event(
        &mut self,
        event: Self::Event,
        event_context: Self::EventContext,
        control: &mut Control,
    ) -> Option<Self::Event>;
    fn render(&'a mut self, surface: Self::Surface) -> Self::RenderTarget;
}

Middleware trait.

Required Associated Types

type Event

Event type to be handled;

type EventContext

Specific context supporting the event handling.

type Surface

Surface to render to.

type Init

Initialization context to be passed to the application.

type Context

Context to be passed to the application.

type RenderTarget

Render target to be passed to the application.

Required Methods

fn init(&'a mut self, control: &'a mut Control) -> Self::Init

Initialize during startup.

fn update( &'a mut self, control: &'a mut Control, delta: Duration, ) -> Self::Context

Provide context for the application update process.

fn handle_event( &mut self, event: Self::Event, event_context: Self::EventContext, control: &mut Control, ) -> Option<Self::Event>

Handle event generated by the backend, return it if not consumed.

fn render(&'a mut self, surface: Self::Surface) -> Self::RenderTarget

Provide render context for the application to draw on.

Implementors