FXML cellValueFactory for TreeTableColumn

fxml, java-8, javafx-8

Solution

Here is a sample TreeTableView in FXML.

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

<?import javafx.scene.control.TreeTableView?>
<?import javafx.scene.control.TreeTableColumn?>
<?import javafx.scene.control.cell.TreeItemPropertyValueFactory?>

<TreeTableView>
    <columnResizePolicy>
        <TreeTableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
    </columnResizePolicy>
    <columns>
        <TreeTableColumn text="Contract Number">
            <cellValueFactory>
                <TreeItemPropertyValueFactory property="contractNumber" />
            </cellValueFactory>
        </TreeTableColumn>
    </columns>
</TreeTableView>

See RT-35233.

Problem

I've been trying to build a Tree Table and define the cellValueFactories in FXML. When I try this, I get the following error in the stack trace ``` Exception in thread "JavaFX Application Thread" java.lang.ClassCastException: javafx.scene.control.TreeTableColumn$CellDataFeatures cannot be cast to javafx.scene.control.TableColumn$CellDataFeatures ``` The FXML is written as follows ``` <TreeTableView prefHeight="500.0" prefWidth="600.0" fx:id="customerContractsTable"> <columns> <TreeTableColumn prefWidth="116.0" text="Contract Number"> <cellValueFactory> <PropertyValueFactory property=""/> </cellValueFactory> </TreeTableColumn> </columns> </TreeTableView> ``` I've been trying to find any documentation references on how to do this and am coming up completely empty handed. Any documentation or help would be greatly apperciated.

Original source