I have succeeded to find a good solution.
I have removed the scene
field from these classes, and added the super
method in the constructors, than added the elements to the class (this.getChildren().addAll(..)
).
Finally, here's my main controller:
public class Main extends Application {
public int difficulty = 1;
public GameState gameState = new GameState(difficulty);
public MainMenu mainMenu = new MainMenu();;
StackPane stackPane = new StackPane();
@Override
public void start(final Stage stage) {
stage.resizableProperty().setValue(false);
stage.setTitle("Main");
Scene scene = new Scene(stackPane, 650, 650);
scene.setCamera(new PerspectiveCamera());
stage.setScene(scene);
stage.show();
stackPane.getChildren().add(mainMenu);
mainMenu.getStartButton().setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent t) {
changeScene(gameState);
try {
gameState.startGame();
} catch (InterruptedException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
}
public void changeScene(Parent newPage) {
stackPane.getChildren().add(newPage);
EventHandler<ActionEvent> finished = new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
stackPane.getChildren().remove(0);
}
};
final Timeline switchPage = new Timeline(
new KeyFrame(Duration.seconds(0), new KeyValue(stackPane.getChildren().get(1).opacityProperty(), 0.0), new KeyValue(stackPane.getChildren().get(0).opacityProperty(), 1.0)),
new KeyFrame(Duration.seconds(3), finished, new KeyValue(stackPane.getChildren().get(1).opacityProperty(), 1.0), new KeyValue(stackPane.getChildren().get(0).opacityProperty(), 0.0))
);
switchPage.play();
}
}