Struct winit::event_loop::EventLoop

pub struct EventLoop<T: 'static> { /* fields omitted */ }

Provides a way to retrieve events from the system and from the windows that were registered to the events loop.

An EventLoop can be seen more or less as a "context". Calling EventLoop::new() initializes everything that will be required to create windows. For example on Linux creating an event loop opens a connection to the X or Wayland server.

To wake up an EventLoop from a another thread, see the EventLoopProxy docs.

Note that the EventLoop cannot be shared across threads (due to platform-dependant logic forbidding it), as such it is neither Send nor Sync. If you need cross-thread access, the Window created from this EventLoop can be sent to an other thread, and the EventLoopProxy allows you to wake up an EventLoop from another thread.

Methods

impl EventLoop<()>

pub fn new() -> EventLoop<()>

Builds a new event loop with a () as the user event type.

Platform-specific

• iOS: Can only be called on the main thread.

impl<T> EventLoop<T>

pub fn with_user_event() -> EventLoop<T>

Builds a new event loop.

Usage will result in display backend initialisation, this can be controlled on linux using an environment variable WINIT_UNIX_BACKEND. Legal values are x11 and wayland. If it is not set, winit will try to connect to a wayland connection, and if it fails will fallback on x11. If this variable is set with any other value, winit will panic.

Platform-specific

• iOS: Can only be called on the main thread.

pub fn run<F>(self, event_handler: F) -> ! where
    F: 'static + FnMut(Event<T>, &EventLoopWindowTarget<T>, &mut ControlFlow), 

Hijacks the calling thread and initializes the winit event loop with the provided closure. Since the closure is 'static, it must be a move closure if it needs to access any data from the calling context.

See the ControlFlow docs for information on how changes to &mut ControlFlow impact the event loop's behavior.

Any values not passed to this function will not be dropped.

pub fn create_proxy(&self) -> EventLoopProxy<T>

Creates an EventLoopProxy that can be used to dispatch user events to the main event loop.

pub fn available_monitors(&self) -> impl Iterator<Item = MonitorHandle>

Returns the list of all the monitors available on the system.

pub fn primary_monitor(&self) -> MonitorHandle

Returns the primary monitor of the system.

Trait Implementations

impl<T> EventLoopExtUnix for EventLoop<T>

fn new_x11() -> Result<Self, XNotSupported>

Builds a new EventLoops that is forced to use X11.

fn new_wayland() -> Self

Builds a new EventLoop that is forced to use Wayland.

impl<T> EventLoopExtDesktop for EventLoop<T>

type UserEvent = T

A type provided by the user that can be passed through Event::UserEvent.

fn run_return<F>(&mut self, event_handler: F) where
    F: FnMut(Event<T>, &EventLoopWindowTarget<T>, &mut ControlFlow), 

Initializes the winit event loop.

impl<T> Debug for EventLoop<T>

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

Formats the value using the given formatter.

impl<T> Deref for EventLoop<T>

type Target = EventLoopWindowTarget<T>

The resulting type after dereferencing.

fn deref(&self) -> &EventLoopWindowTarget<T>

Dereferences the value.