JavaFX8 fxml naming of nested controllers

Question

Given an .fxml include like:

<fx:include fx:id="header" source="Header.fxml" />

The Java FXML docs say to create two variables like:

@FXML private HBox header;
@FXML private HeaderController headerController;

What determines the controller variable name? Is it always just the include id followed by "Controller"?

It's not explicitly stated in the documentation, but that is how I interpret it (and it always seems to work that way.) — James_D
– James_D, Commented Jun 10, 2017 at 0:00
What better way is there to identify which controller is associated with the fxml file? — SedJ601
– SedJ601, Commented Jun 10, 2017 at 4:56
@SedrickJefferson something like header.getController() and a variable name I can control? — simpleuser
– simpleuser, Commented Jun 12, 2017 at 15:26

fabian · Accepted Answer · 2017-06-10 07:37:56Z

5

Yes the field name the controller is injected to is always constructed by concatenating the fx:id of the <fx:include> tag with "Controller".

A suffix for controllers of included fxml files. The full key is stored in namespace map.

(The namespace map contains all the objects by the field name they are injected to, if such a field exists.)

answered Jun 10, 2017 at 7:37

fabian

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1 Comment

Very comprehensive answer! Thank you.