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Based on discussion with JavaFX team on 12 AUG 13 I quote: Q: Find usages and linking not working in some cases from FXML - I saw that they work for the Controller class but weren't working for individual methods? A: Right. The shortcut+click works for css file & controller file, but the onAction="#myHandler" for a Button, for example, didn't work. We did get code completion for any methods that were already defined on the controller (that took the event object). I believe it is valid to target a method that takes no arguments as well. What you want here is the ability to type in some name and get a hint to add the method to the controller if it isn't already defined. Also to shortcut+click to take you to the method. You also want "find usages" on the method in the controller to show the usages in FXML files.
Find usages on the controller class should also show where it is referenced in the FXML file, as that may be the only reference in the project.