JavaFX – how to make ComboBox hgrow?

I have JavaFX (8), H@R_509_2419 @, Combo@R_509_2419 @And hgrow

This is my fxml Code:

<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<V@R_509_2419@ prefHeight="117.0" prefWidth="285.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="de.test.TestController">
  <children>
     <H@R_509_2419@ prefHeight="105.0" prefWidth="196.0" V@R_509_2419@.vgrow="ALWAYS">
     <children>
        <Combo@R_509_2419@ fx:id="fxCboTest" prefHeight="25.0" prefWidth="62.0" H@R_509_2419@.hgrow="ALWAYS" />
     </children>
    </H@R_509_2419@>
  </children>
</V@R_509_2419@>

This code will lead to:

I have also tried the following code (without success, this code does nothing):

H@R_509_2419@.setHgrow(uiController.fxCboTest,Priority.ALWAYS);

Does anyone know how to make it Combo@R_509_2419 @ HGrow？

Solution

This is the answer to my own question

This will result in the following code / XML from scenebuilder:

...
<children>
   <Combo@R_509_2419@ maxWidth="1.7976931348623157E308" prefWidth="150.0" H@R_509_2419@.hgrow="ALWAYS" />
</children>
...

Among them, 1.7976931348623157e308 looks like double MAX_ VALUE. This also applies to H@R_509_2419 @Multiple controls in

In my opinion, this is not very / continuous I still don't know why hgrow can't be used for Combo@R_509_2419 @.