Struct Headless 

pub struct Headless<A: App> { /* private fields */ }

Drives an App the way the event loop does, minus the terminal.

Implementations

impl<A: App> Headless<A>

where A::Message: Send + 'static,

pub fn start(app: A, size: CellSize) -> Self

Start app on a screen of size cells.

pub fn type_bytes(&mut self, bytes: &[u8])

Feed bytes as if typed, with a lone escape counting as Esc.

pub fn input(&mut self, event: InputEvent)

Deliver one input event; answers to pacing queries stay with the loop, as they do on a terminal.

pub fn deliver_messages(&mut self)

Deliver every message the app’s threads queued so far.

pub fn resize(&mut self, size: CellSize)

Resize the screen and let it settle, the way a window resize ends.

pub fn frame(&mut self) -> Result<Option<Vec<u8>>>

Draw one frame when the app asked for one; None when it waits or quit.

pub fn quit(&self) -> bool

Whether the app asked to quit.

pub fn app(&self) -> &A

The app, for asserting on its state.

Trait Implementations

impl<A: Debug + App> Debug for Headless<A>

where A::Message: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.