Why disappears the JavaFX content on my TopComponent?

Question

I've got a problem that maybe is caused by a lack of understanding in some principles of wether the Netbeans Platform(7.1.2) or JavaFX 2. I wanted to add a JFXPanel with a very simple Scene to a Swing JPanel that is a child of a TopComponent. I achieved this by the following code:

 public accexTopComponent() {
    initComponents();
    setName(Bundle.CTL_accexTopComponent());
    setToolTipText(Bundle.HINT_accexTopComponent());
    putClientProperty(TopComponent.PROP_CLOSING_DISABLED, Boolean.TRUE);



    //Begin of my code
    myFX = new JFXPanel(); //myFX is a static JFXPanel
    Platform.runLater(new Runnable() {

        @Override
        public void run() {

            myFX.setScene(new Scene(ButtonBuilder.create().minHeight(40.0).minWidth(40.0).build()));

        }
    });

      jPanel1.add(myFX);



}

This compiles without a problem and a JavaFX Button is displayed when i show the TopComponent for the very first time. But as soon as the component is hidden and shown again, the JavaFX Button disappears while the other children still are visible.

Why does the JavaFX content disappear?

Edit:

I now include the source of the whole TopComponent. I guess that's all you need to test it for yourself. I didn't change any other file.

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package de.jeed.nbgan.accexplorer;

import java.awt.Color;
import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.scene.Scene;
import javafx.scene.control.ButtonBuilder;
import javafx.scene.text.TextBuilder;
import javafx.scene.web.WebView;
import javafx.scene.web.WebViewBuilder;
import org.netbeans.api.settings.ConvertAsProperties;
import org.openide.awt.ActionID;
import org.openide.awt.ActionReference;
import org.openide.windows.TopComponent;
import org.openide.util.NbBundle.Messages;

/**
 * Top component which displays something.
 */
@ConvertAsProperties(dtd = "-//de.jeed.nbgan.accexplorer//accex//EN",
autostore = false)
@TopComponent.Description(preferredID = "accexTopComponent",
//iconBase="SET/PATH/TO/ICON/HERE", 
persistenceType = TopComponent.PERSISTENCE_ALWAYS)
@TopComponent.Registration(mode = "explorer", openAtStartup = true)
@ActionID(category = "Window", id = "de.jeed.nbgan.accexplorer.accexTopComponent")
@ActionReference(path = "Menu/Window" /*
 * , position = 333
 */)
@TopComponent.OpenActionRegistration(displayName = "#CTL_accexAction",
preferredID = "accexTopComponent")
@Messages({
    "CTL_accexAction=accex",
    "CTL_accexTopComponent=Konten-Explorer",
    "HINT_accexTopComponent=Durchsuchen von Abteilungen und Konten"
})
public final class accexTopComponent extends TopComponent {

    static JFXPanel myFX;

    public accexTopComponent() {
        initComponents();
        setName(Bundle.CTL_accexTopComponent());
        setToolTipText(Bundle.HINT_accexTopComponent());
        putClientProperty(TopComponent.PROP_CLOSING_DISABLED, Boolean.TRUE);
        myFX = new JFXPanel();
        Platform.runLater(new Runnable() {

            @Override
            public void run() {

                myFX.setScene(new                            Scene(ButtonBuilder.create().minHeight(40.0).minWidth(40.0).build()));

        }
    });

      jPanel1.add(myFX);


}

/**
 * This method is called from within the constructor to initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 */
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    jPanel1 = new javax.swing.JPanel();

    jPanel1.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED));
    jPanel1.setLayout(new java.awt.GridBagLayout());

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
    this.setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(54, 54, 54)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 193, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(153, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(33, 33, 33)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 193, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(74, Short.MAX_VALUE))
    );
}// </editor-fold>                        
// Variables declaration - do not modify                     
private javax.swing.JPanel jPanel1;
// End of variables declaration                   

@Override
public void componentOpened() {
    // TODO add custom code on component opening
}

@Override
public void componentClosed() {
    // TODO add custom code on component closing
}

void writeProperties(java.util.Properties p) {
    // better to version settings since initial version as advocated at
    // http://wiki.apidesign.org/wiki/PropertyFiles
    p.setProperty("version", "1.0");
    // TODO store your settings
}

void readProperties(java.util.Properties p) {
    String version = p.getProperty("version");
    // TODO read your settings according to their version
}
}

In my case, this TopComponent is part of a Component called AccountExplorer which references JavaFX and is referenced by a plain NB Platform Application.

Answer 1

Try this:

Platform.setImplicitExit(false);