Struct bevy_ui_navigation::NavRequestSystem

pub struct NavRequestSystem;

The label of the system in which the NavRequest events are handled, the focus state of the Focusables is updated and the NavEvent events are sent.

Systems updating visuals of UI elements should run after the NavRequestSystem, while systems that emit NavRequest should run before it. For example, an input system should run before the NavRequestSystem.

Failing to do so won’t cause logical errors, but will make the UI feel more slugish than necessary. This is especially critical of you are running on low framerate.

Example

use bevy_ui_navigation::prelude::*;
use bevy_ui_navigation::events::Direction;
use bevy_ui_navigation::custom::GenericNavigationPlugin;
use bevy::prelude::*;
fn main() {
    App::new()
        .add_plugin(GenericNavigationPlugin::<MoveCursor3d>::new())
        // ...
        // Add the button color update system after the focus update system
        .add_system(button_system.after(NavRequestSystem))
        // ...
        .run();
}

Trait Implementations

impl Clone for NavRequestSystem

fn clone(&self) -> NavRequestSystem

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NavRequestSystem

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

Formats the value using the given formatter.

impl Hash for NavRequestSystem

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl PartialEq<NavRequestSystem> for NavRequestSystem

fn eq(&self, other: &NavRequestSystem) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl SystemLabel for NavRequestSystem where
    Self: 'static, 

fn as_str(&self) -> &'static str

Returns the representation of this label as a string literal.

fn as_label(&self) -> SystemLabelId

Converts this type into an opaque, strongly-typed label.

fn type_id(&self) -> TypeId

Returns the [TypeId] used to differentiate labels.

impl Eq for NavRequestSystem

impl StructuralEq for NavRequestSystem

impl StructuralPartialEq for NavRequestSystem