CommandsViewModel.java

package pt.isec.pa.pong.ui;

import javafx.application.Platform;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import pt.isec.pa.pong.model.Game;

class CommandsViewModel {
    Game game;

    BooleanProperty btStart, bdPause, bdResume;

    CommandsViewModel(Game game) {
        this.game = game;
        btStart = new SimpleBooleanProperty(false);
        bdPause = new SimpleBooleanProperty(false);
        bdResume = new SimpleBooleanProperty(false);

        game.addListener(Game.PROP_GAME, evt -> Platform.runLater(() -> {
            btStart.set(game.isGameActive());
            bdPause.set(!game.isGameActive() || game.isGamePaused());
            bdResume.set(!game.isGameActive() || !game.isGamePaused());
        }));
    }

    public void start() {
        game.initGame();
    }

    public void pause() {
        game.pauseGame();
    }

    public void resume() {
        game.resumeGame();
    }
}