JavaFX: why scrollpane is including a splitpane?

Question

I am trying to understand how widgets in JavaFX work, and given the following FXML I don't get why a ScrollPane is putting a split in after the ListView :

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

<?import javafx.scene.control.Label?>
<?import javafx.scene.control.ListView?>
<?import javafx.scene.control.ScrollPane?>
<?import javafx.scene.control.ToolBar?>
<?import javafx.scene.Group?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.Pane?>
<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="500.0"
            prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
    <top>
        <Pane prefHeight="195.0" prefWidth="600.0" BorderPane.alignment="CENTER">
            <children>
                <Group>
                    <children>
                        <Label layoutX="58.0" layoutY="25.0" prefHeight="15.0" prefWidth="80.0" text="Testlabel "/>
                    </children>
                </Group>
            </children>
        </Pane>
    </top>
    <center>
        <ScrollPane fx:id="scrollPane" prefHeight="200.0" prefWidth="600.0" BorderPane.alignment="CENTER">
            <content>
                <ListView/>
            </content>
        </ScrollPane>
    </center>
    <bottom>
        <ToolBar layoutX="-86.0" layoutY="150.0" prefWidth="200.0">
            <items>

            </items>
        </ToolBar>
    </bottom>
</BorderPane>

I just want to have a ListView with a possiblity to scroll if the list is too long. Using JavaFX included in the latest JDK 8 (1.8.0_05) on Linux Mint.

Answer 1

Putting minWidth="600" as an attribute of ListView fixes the problem:

    <ScrollPane fx:id="scrollPane" prefHeight="100.0" prefWidth="600.0" BorderPane.alignment="CENTER">
        <ListView minWidth="600"/>
    </ScrollPane>

But I must admit it is utterly unintuitive. JavaFX should figure by itself out what the preferred width should be. Smells like Swing people developing JavaFX.