Constants in an FXML file

Question

Couldn't find any examples on this. How do I define constants in an FXML file?

For example (where CONTENT_SPACING is the constant I want to create):

<VBox fx:controller="myapp.Controller" xmlns:fx="http://javafx.com/fxml" alignment="center" spacing="20">
    <fx:define>
        <Double fx:id="CONTENT_SPACING" fx:value="200"/>
    </fx:define>

    <VBox fx:id="content" spacing="$CONTENT_SPACING">
        <!-- My window contents would go here -->
    </VBox>
</VBox>

My code would benefit in readability if this was possible. Thanks!

I think this works if you correct the syntax: `spacing="${CONTENT_SPACING}"` — James_D, May 26 '14 at 02:19

score 12 · Accepted Answer · edited Oct 25 '18 at 14:07

12

Well, this is a bit embarrassing. It was valid FXML all along, but my IDE (IntelliJ IDEA) keeps telling me it's not. The code itself runs fine.

screenshot

I'll go file a bug report.

Edit: Bug is fixed.

edited Oct 25 '18 at 14:07

cubuspl42

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answered May 26 '14 at 04:46

midrare

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I'm not actually sure it should work though. Does IntelliJ still complain if you include the `{}` in the expression? – James_D May 26 '14 at 05:29
@James_D IntelliJ complains with or without the `{}`. But the code runs fine both with and without the braces. No complaints from the VM, only IntelliJ. – midrare May 26 '14 at 21:52
Same issue with IntelliJ 14.1.2. I couldn't find any bug report at https://youtrack.jetbrains.com – Paolo Fulgoni May 13 '15 at 13:54
Any way to have CONTENT_SPACING defined in the controller? – Alex Stoneham Sep 22 '22 at 22:24

Constants in an FXML file

1 Answers1