JavaFx: how to reference main Controller class instance from CustomComponentController class?

Question

WHAT I HAVE is a standard JavaFX application: Main.java, MainController.java & main.fxml. To add custom component, I created CustomComponentController

Answer 1

Your problem looks like the classic catalog-crud forms updating, I implemented an interface that I called Updatable with an update method so I could reference any catalog form with any crud form easy after passing Controller Main Class as the UserData Property of the Child Root Component's Form

Hope it Can Solve your problem