import javafx.application.Application;

import javafx.application.Platform;

import javafx.beans.value.ChangeListener;

import javafx.beans.value.ObservableValue;

import javafx.collections.ListChangeListener;

import javafx.collections.ListChangeListener.Change;

import javafx.concurrent.Worker.State;

import javafx.event.ActionEvent;

import javafx.event.Event;

import javafx.event.EventHandler;

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.ComboBox;

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.WebHistory;

import javafx.scene.web.WebHistory.Entry;

import javafx.scene.web.WebView;

import javafx.stage.Stage;

import javafx.util.Callback;

import netscape.javascript.JSObject;

public class main extends Application {

    private Scene scene;

    @Override

    public void start(Stage stage) {

        // create scene

        stage.setTitle("Web View");

        scene = new Scene(new Browser(), 750, 500, Color.web("#666970"));

        stage.setScene(scene);

        // apply CSS style

        scene.getStylesheets().add("webviewsample/BrowserToolbar.css");

        // show stage

        stage.show();

    }

    public static void main(String[] args) {

        launch(main.class, args);

    }

}

class Browser extends Region {

    private HBox toolBar;

    private static String[] imageFiles = new String[]{

        "http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_1000871&contentType=image/jpeg",

        "http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_1000871&contentType=image/jpeg",

        "http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_1000871&contentType=image/jpeg",

        "http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_1000871&contentType=image/jpeg",

        "http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_1000871&contentType=image/jpeg",

    };

    private static String[] captions = new String[]{

        "Products",

        "Blogs",

        "Documentation",

        "Partners",

        "Help"

    };

    private static String[] urls = new String[]{

        "http://www.oracle.com/products/index.html",

        "http://blogs.oracle.com/",

        "http://docs.oracle.com/javase/index.html",

        "http://tinybrain.de/",

        "http://tinybrain.blog.de/"

    };

    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 showPrevDoc = new Button("Toggle Previous Docs");

    final WebView smallView = new WebView();

    final ComboBox comboBox = new ComboBox();

    private boolean needDocumentationButton = false;

    public Browser() {

        //apply the styles

        getStyleClass().add("browser");

        for (int i = 0; i < captions.length; i++) {

            // create hyperlinks

            Hyperlink hpl = hpls[i] = new Hyperlink(captions[i]);

            Image image = images[i] =

                    new Image(imageFiles[i], 100, 0, false, false);

            hpl.setGraphic(new ImageView(image));

            final String url = urls[i];

            final boolean addButton = (hpl.getText().equals("Documentation"));

            // process event 

            hpl.setOnAction(new EventHandler<ActionEvent>() {

                @Override

                public void handle(ActionEvent e) {

                    needDocumentationButton = addButton;

                    webEngine.load(url);

                }

            });

        }

        comboBox.setPrefWidth(60);

        // create the toolbar

        toolBar = new HBox();

        toolBar.setAlignment(Pos.CENTER);

        toolBar.getStyleClass().add("browser-toolbar");

        toolBar.getChildren().add(comboBox);

        toolBar.getChildren().addAll(hpls);

        toolBar.getChildren().add(createSpacer());

        //set action for the button

        showPrevDoc.setOnAction(new EventHandler() {

            @Override

            public void handle(Event t) {

                webEngine.executeScript("toggleDisplay('PrevRel')");

            }           

        });

        smallView.setPrefSize(120, 80);

        //handle popup windows

        webEngine.setCreatePopupHandler(

            new Callback<PopupFeatures, WebEngine>() {

                @Override public WebEngine call(PopupFeatures config) {

                    smallView.setFontScale(0.8);

                    if (!toolBar.getChildren().contains(smallView)) {

                        toolBar.getChildren().add(smallView);

                    }

                    return smallView.getEngine();

                }

             }

        );

        //process history

        final WebHistory history = webEngine.getHistory();

        history.getEntries().addListener(new 

            ListChangeListener<WebHistory.Entry>(){

                @Override

                public void onChanged(Change<? extends Entry> c) {

                    c.next();

                    for (Entry e : c.getRemoved()) {

                        comboBox.getItems().remove(e.getUrl());

                    }

                    for (Entry e : c.getAddedSubList()) {

                        comboBox.getItems().add(e.getUrl());

                    }

                }

        });

        //set the behavior for the history combobox               

        comboBox.setOnAction(new EventHandler<ActionEvent>() {

            @Override

            public void handle(ActionEvent ev) {

                int offset =

                        comboBox.getSelectionModel().getSelectedIndex()

                        - history.getCurrentIndex();

                history.go(offset);

            }

        });

        // process page loading

        webEngine.getLoadWorker().stateProperty().addListener(

            new ChangeListener<State>() {

                @Override

                public void changed(ObservableValue<? extends State> ov,

                    State oldState, State newState) {

                    toolBar.getChildren().remove(showPrevDoc);    

                    if (newState == State.SUCCEEDED) {

                            JSObject win = 

                                (JSObject) webEngine.executeScript("window");

                            win.setMember("app", new JavaApp());

                            if (needDocumentationButton) {

                                toolBar.getChildren().add(showPrevDoc);

                            }

                        }

                    }

                }

        );

        // load the home page        

        webEngine.load("http://www.oracle.com/products/index.html");

        //add components

        getChildren().add(toolBar);

        getChildren().add(browser);

    }

    // JavaScript interface object

    public class JavaApp {

        public void exit() {

            Platform.exit();

        }

    }

    private Node createSpacer() {

        Region spacer = new Region();

        HBox.setHgrow(spacer, Priority.ALWAYS);

        return spacer;

    }

    @Override

    protected void layoutChildren() {

        double w = getWidth();

        double h = getHeight();

        double tbHeight = toolBar.prefHeight(w);

        layoutInArea(browser,0,0,w,h-tbHeight,0,HPos.CENTER,VPos.CENTER);

        layoutInArea(toolBar,0,h-tbHeight,w,tbHeight,0,HPos.CENTER,VPos.CENTER);

    }

    @Override

    protected double computePrefWidth(double height) {

        return 750;

    }

    @Override

    protected double computePrefHeight(double width) {

        return 600;

    }

}