BranchNinja/stateMachine at master · varomix/BranchNinja · GitHub

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class MyGame {
    static public var game : Game;

    static function main() {
        game = new Game();

        for (i in 0...10) {
            game.update();
            game.render();
        }

        game.switchState(new PlayState());

        for (i in 0...10) {
            game.update();
        	game.render();
        }
    }
}

class Game {
    public var state : State;

    public function new() {
        state = new MenuState();
        state.create();
    }

    public function update() {
        state.update();
    }

    public function render() {
        state.render();
    }

    public function switchState(state : State) {
        this.state.destroy();
        this.state = state;
        this.state.create();
    }
}

class State {
    public function new() {}
    public function create() {}
    public function destroy() {}
    public function update() {}
    public function render() {}
}

class MenuState extends State {
    public function new() { super(); }
    override public function create() { super.create(); trace("Creating Menu State"); }
    override public function destroy() { super.destroy(); trace("Destroying Menu State"); }
    override public function update() { super.update(); trace("Updating Menu State"); }
    override public function render() { super.render(); trace("Rendering Menu State"); }
}

class PlayState extends State {
    public function new() { super(); }
    override public function create() { super.create(); trace("Creating Play State"); }
    override public function destroy() { super.destroy(); trace("Destroying Play State"); }
    override public function update() { super.update(); trace("Updating Play State"); }
    override public function render() { super.render(); trace("Rendering Play State"); }
}