JavaFX: Adding HTML Content to JavaFX Applications

7 Managing Web Pop-Up Windows

This chapter explains how to work with pop-up windows in the browser created by using the WebView component and how to implement this functionality in the WebViewSample application.

When you need to open a new browser window in your application, the instances of the PopupFeatures class are passed into pop-up handlers registered on a WebEngine object by using the setCreatePopupHandler method.

Using Pop-Up Windows to Set

In the WebViewSample application, you can set an alternative WebView object for the documents that will be opened in a separate window. Figure 7-1 shows a context menu a user can open by right-clicking any link.

To specify a new browser window for the target document, use the PopupFeatures instance as shown in the modified application code in Example 7-1.

Example 7-1 Processing a Command of a Pop-Up Window

import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Worker.State;
import javafx.event.ActionEvent;
import javafx.geometry.HPos;
import javafx.geometry.Pos;
import javafx.geometry.VPos;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Hyperlink;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.scene.paint.Color;
import javafx.scene.web.PopupFeatures;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
import netscape.javascript.JSObject;
public class WebViewSample extends Application {
    private Scene scene;
    public void start(Stage stage) {
        // create scene
        stage.setTitle("Web View Sample");
        scene = new Scene(new Browser(stage), 900, 600, Color.web("#666970"));
        // apply CSS style
        // show stage;
    public static void main(String[] args) {
class Browser extends Region {
    private final HBox toolBar;
    final private static String[] imageFiles = new String[]{
    final private static String[] captions = new String[]{
    final private static String[] urls = new String[]{
    final ImageView selectedImage = new ImageView();
    final Hyperlink[] hpls = new Hyperlink[captions.length];
    final Image[] images = new Image[imageFiles.length];
    final WebView browser = new WebView();
    final WebEngine webEngine = browser.getEngine();
    final Button toggleHelpTopics = new Button("Toggle Help Topics");
    private boolean needDocumentationButton = false;
    final WebView smallView = new WebView();
    public Browser(final Stage stage) {
        //apply the styles
        for (int i = 0; i < captions.length; i++) {
            // create hyperlinks
            Hyperlink hpl = hpls[i] = new Hyperlink(captions[i]);
            Image image = images[i]
                    = new Image(getClass().getResourceAsStream(imageFiles[i]));
            hpl.setGraphic(new ImageView(image));
            final String url = urls[i];
            final boolean addButton = (hpl.getText().equals("Help"));  
            // process event 
            hpl.setOnAction((ActionEvent e) -> {
                needDocumentationButton = addButton;
        // create the toolbar
        toolBar = new HBox();
        //set action for the button
        toggleHelpTopics.setOnAction((ActionEvent t) -> {
        smallView.setPrefSize(120, 80);
        //handle popup windows
                (PopupFeatures config) -> {
                    if (!toolBar.getChildren().contains(smallView)) {
                    return smallView.getEngine();
         // process page loading
            (ObservableValue<? extends State> ov, State oldState, 
                State newState) -> {
                    if (newState == State.SUCCEEDED) {
                        JSObject win
                                = (JSObject) webEngine.executeScript("window");
                        win.setMember("app", new JavaApp());
                        if (needDocumentationButton) {
        // load the home page        
        //add components
    // JavaScript interface object
    public class JavaApp {
        public void exit() {
    private Node createSpacer() {
        Region spacer = new Region();
        HBox.setHgrow(spacer, Priority.ALWAYS);
        return spacer;
    protected void layoutChildren() {
        double w = getWidth();
        double h = getHeight();
        double tbHeight = toolBar.prefHeight(w);
    protected double computePrefWidth(double height) {
        return 900;
    protected double computePrefHeight(double width) {
        return 600;

When a user selects the Open Link in New Window option from the pop-up menu, the smallView browser is added to the application toolbar. This behavior is defined by the setCreatePopupHandler method, which returns the web engine of an alternative browser to notify the application where to render the target page. The result of compiling and running the modified application is shown in Figure 7-2.

Figure 7-2 Small Preview Browser

Description of Figure 7-2 follows
Description of "Figure 7-2 Small Preview Browser"

Note that context menus are enabled by default for all WebView objects. To disable a context menu for a particular WebView instance, pass the false value to the setContextMenuEnabled method: browser.setContextMenuEnabled(false);.

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