Struct Crossterm 

pub struct Crossterm<PainterT: Painter = IncrementalPainter> { /* private fields */ }

A terminal backend implementation for Zi using crossterm

fn main() -> zi_term::Result<()> {
    zi_term::incremental()?
        .run_event_loop(Text::with(TextProperties::new().content("Hello, world!")))
}

Implementations

impl<PainterT: Painter> Crossterm<PainterT>

pub fn new() -> Result<Self>

Create a new backend instance.

This method initialises the underlying tty device, enables raw mode, hides the cursor and enters alternative screen mode. Additionally, an async event stream with input events from stdin is started.

pub fn run_event_loop(&mut self, layout: Layout) -> Result<()>

Starts the event loop. This is the main entry point of a Zi application. It draws and presents the components to the backend, handles user input and delivers messages to components. This method returns either when prompted using the exit method on ComponentLink or on error.

fn main() -> zi_term::Result<()> {
    zi_term::incremental()?
        .run_event_loop(Text::with(TextProperties::new().content("Hello, world!")))
}

pub fn suspend(&mut self) -> Result<()>

Suspends the event stream.

This is used when running something that needs exclusive access to the underlying terminal (i.e. to stdin and stdout). For example spawning an external editor to collect or display text. The resume function is called upon returning to the application.

pub fn resume(&mut self) -> Result<()>

Recreates the event stream and reinitialises the underlying terminal.

This function is used to return execution to the application after running something that needs exclusive access to the underlying backend. It will only be called after a call to suspend.

In addition to restarting the event stream, this function should perform any other required initialisation of the backend. For ANSI terminals, this typically hides the cursor and saves the current screen content (i.e. “alternative screen mode”) in order to restore the previous terminal content on exit.

Trait Implementations

impl<PainterT: Painter> Drop for Crossterm<PainterT>

fn drop(&mut self)

Executes the destructor for this type.