bevy_ui_navigation::systems

Function update_boundaries

Source 
pub fn update_boundaries(
    commands: Commands<'_, '_>,
    boundaries: Option<ResMut<'_, ScreenBoundaries>>,
    cam: Query<'_, '_, (&Camera, Option<&UiCameraConfig>), Or<(Changed<Camera>, Changed<UiCameraConfig>)>>,
)
Expand description

Update ScreenBoundaries resource when the UI camera change (assuming there is a unique one).

See ScreenBoundaries doc for details.