JavaFX – how to set the margins of borderpane in fxml?

• Java

I want to run this fxml code in JavaFX:

<BorderPane fx:controller="com.bryantmorrill.chat.main.Controller"
      xmlns:fx="http://javafx.com/fxml" >

<center>
    <ScrollPane BorderPane.margin="25,25,25">
        <content>
            <TextArea fx:id="chatArea" minWidth="200" maxWidth="450"
                      prefWidth="450" minHeight="200" prefHeight="400"
                      maxHeight="400"/>
        </content>
    </ScrollPane>
</center>

<bottom>
    <FlowPane BorderPane.margin="25,25">
        <TextField fx:id="inputArea" minWidth="200" maxWidth="450" prefWidth="450"/>
        <Button text="Send" onAction="#sendMessage" minWidth="200" maxWidth="450" prefWidth="450"/>
    </FlowPane>

</bottom>

However, when I tried to set the margin in this way, I failed:

<ScrollPane BorderPane.margin="25,25">

I have also tried these methods:

<ScrollPane BorderPane.margin="25 25 25 25">
<ScrollPane BorderPane.margin="25">

These are all the exceptions I get:

java.lang.IllegalArgumentException: Unable to coerce 25,25 to class javafx.geometry.Insets.

This is my first time using JavaFX. I can't find any good examples Thanks for your help!

Solution

You need to add margins as child elements of the child nodes of borderpane:

<center>
    <ScrollPane>
        <BorderPane.margin>
             <Insets bottom="25.0" left="25.0" right="25.0" top="25.0" />
        </BorderPane.margin>
        <content>
            <TextArea fx:id="chatArea" minWidth="200" maxWidth="450"
                      prefWidth="450" minHeight="200" prefHeight="400"
                      maxHeight="400"/>
        </content>
    </ScrollPane>
</center>
<bottom>
    <FlowPane>
        <BorderPane.margin>
             <Insets bottom="25.0" left="25.0" right="25.0" top="25.0" />
        </BorderPane.margin>
        <TextField fx:id="inputArea" minWidth="200" maxWidth="450" prefWidth="450"/>
        <Button text="Send" onAction="#sendMessage" minWidth="200" maxWidth="450" prefWidth="450"/>
    </FlowPane>
</bottom>
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