State changes (on Bevy 0.10)

[adiletto64]

place: https://bevy-cheatbook.github.io/programming/states.html

Conditional running

use ✅

.add_systems(Update, handle_ui_buttons.run_if(in_state(AppState::MainMenu)))

instead of ❌

.add_system_set(SystemSet::on_update(AppState::MainMenu)
                .with_system(handle_ui_buttons)
)

On enter

use ✅

.add_systems(OnEnter::<AppState>(AppState::MainMenu), setup_menu)

instead of ❌

.add_system_set(
    SystemSet::on_enter(AppState::MainMenu)
        .with_system(setup_menu)
)

On exit

use ✅

.add_systems(OnExit::<AppState>(AppState::MainMenu), close_menu)

instead of ❌

.add_system_set(
    SystemSet::on_exit(AppState::MainMenu)
        .with_system(close_menu)
)

Change

to change to another state use NextState instead of State
(place)

fn enter_game(mut app_state: ResMut<NextState<AppState>>) {
    app_state.set(AppState::InGame).unwrap();
    // ^ this can fail if we are already in the target state
    // or if another state change is already queued
}

[igortavtib]

Hi, I'd like to work on this issue if it is ok