Binding properties of a root node and using fx:include.

Question

I posted a downloadable example of this here:
https://dl.dropboxusercontent.com/u/8788282/binding-test.zip
I've noticed some understandable, but less than perfect behaviour with the way FXML initialization is done when using fx:include.  I find it's difficult to bind properties that belong to the root node of the included view without shooting yourself in the proverbial foot.  Here is an example of what I mean:
sample.Main
package sample;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
    @Override
    public void start(Stage primaryStage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("MainView.fxml"));
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    public static void main(String[] args) {
        launch(args);
sample.MainController
package sample;
import javafx.fxml.FXML;
public class MainController {
    @FXML
    void initialize() {
        System.out.println("MainController initialized.");
sample.MainView (FXML)
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.*?>
<AnchorPane prefHeight="200.0" prefWidth="200.0"
            xmlns:fx="http://javafx.com/fxml/1"
            xmlns="http://javafx.com/javafx/2.2"
            fx:controller="sample.MainController">
    <children>
        <VBox prefHeight="200.0" prefWidth="200.0" AnchorPane.bottomAnchor="0.0"
              AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0"
              AnchorPane.topAnchor="0.0">
            <children>
                <Label text="Main"/>
                <StackPane prefHeight="150.0" prefWidth="200.0"/>
                <fx:include fx:id="sub" source="SubView.fxml" visible="false"/>
            </children>
        </VBox>
    </children>
</AnchorPane>
sample.SubController
package sample;
import javafx.beans.binding.Bindings;
import javafx.fxml.FXML;
import javafx.scene.control.Label;
import javafx.scene.layout.AnchorPane;
public class SubController {
    @FXML
    private AnchorPane anchorPane;
    @FXML
    private Label label;
    @FXML
    void initialize() {
        label.visibleProperty().bind(Bindings.createBooleanBinding(() -> true));
        /* When used as part of an fx:include, this controller's initialize()
         * block is called and the below binding is performed.  After that, any
         * property values set via the containing view (MainView) are applied.
         * In this example, the MainView attempts to set the visible property
         * of this included view (fx:id="sub").  Since the visible property of
         * the root node (anchorPane) has already been bound, the error
         * "A bound value cannot be set." is given.
        anchorPane.visibleProperty().bind(Bindings.createBooleanBinding(() -> true));
        System.out.println("SubController initialized.");
sample.SubView (FXML)
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" fx:id="anchorPane" maxHeight="-Infinity"
            maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity"
            prefHeight="400.0" prefWidth="600.0"
            xmlns:fx="http://javafx.com/fxml/1"
            xmlns="http://javafx.com/javafx/2.2"
            fx:controller="sample.SubController">
    <children>
        <VBox prefHeight="400.0" prefWidth="600.0" AnchorPane.bottomAnchor="0.0"
              AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0"
              AnchorPane.topAnchor="0.0">
            <children>
                <Label fx:id="label" text="sub view"/>
            </children>
        </VBox>
    </children>
</AnchorPane>
The comments in the initialize method of SubController explain what's happening.  I found it a bit confusing until I figured out what was going on.  Should FXMLLoader be checking to see if a property is already bound before trying to set it, at least for nodes declared via fx:include?

Answer 1

Hi Gaurave,
We need to show the report like this to some users, thats what the requirement is. Using the Posted nodes option does not help.
Thanks.