Clever Geek Handbook

How can I make persistent variables in Javafx for XML files

StackPane layoutY="70.0"

prefHeight="479.0"

. I want to make values (70.0)

and (479.0)

static in a Java file so that I can use them for other files.

Is it possible?

+3


source to share


2 answers


If your constant is defined in a class:

public class SomeClass {

    public static final double DEFAULT_HEIGHT = 479 ;

    // ...
}

then you can access it in FXML like this:



<StackPane>
    <prefHeight>
        <SomeClass fx:constant="DEFAULT_HEIGHT" />
    </prefHeight>
</StackPane>

Make sure you have the appropriate imports in your fxml file for the class you are using.

+6


source


James_D showed you a way to do this with a custom class. Another way to do it in fxml is to define your own variables. But they are not shared between files.

Instead of this

<StackPane layoutY="70.0" prefHeight="479.0">

Do you want to have



<StackPane layoutY="$variable" prefHeight="$variable">

You can do it like this:

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

<AnchorPane xmlns:fx="http://javafx.com/fxml/1" id="AnchorPane" prefHeight="200" prefWidth="320"  fx:controller="javafxapplication22.FXMLDocumentController">
  <fx:define>
    <Double fx:id="layoutY"  fx:value="70.0"/>
    <Double fx:id="prefHeight" fx:value="479.0"/>
  </fx:define>
  <children>
    <StackPane layoutY="$layoutY" prefHeight="$prefHeight"/>
    <Pane layoutY="$layoutY" prefHeight="$prefHeight"/>  
  </children>
</AnchorPane>
+6


source






More articles:


All Articles