Struct 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_plugins(GenericNavigationPlugin::<MoveCursor3d>::new())
        // ...
        // Add the button color update system after the focus update system
        .add_systems(Update, 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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for NavRequestSystem

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl SystemSet for NavRequestSystem

where Self: 'static + Send + Sync + Clone + Eq + Debug + Hash,

fn dyn_clone(&self) -> Box<dyn SystemSet>

Clones this SystemSet.

fn as_dyn_eq(&self) -> &dyn DynEq

Casts this value to a form where it can be compared with other type-erased values.

fn dyn_hash(&self, state: &mut dyn Hasher)

Feeds this value into the given Hasher.

fn system_type(&self) -> Option<TypeId>

Returns Some if this system set is a SystemTypeSet.

fn is_anonymous(&self) -> bool

Returns true if this system set is an AnonymousSet.

fn intern(&self) -> Interned<dyn SystemSet>

where Self: Sized,

Returns an Interned value corresponding to self.

impl Eq for NavRequestSystem

impl StructuralPartialEq for NavRequestSystem