public void goForward() {
try {
WebEngine engine = webView.getEngine();
WebHistory history = engine.getHistory();
history.go(1);
} catch (Exception e) {
}
}
// Adding functionality to the forward button
public String goForward() {
final WebHistory history = browser.getEngine().getHistory();
ObservableList<WebHistory.Entry> entryList = history.getEntries();
int currentIndex = history.getCurrentIndex();
Platform.runLater(() -> history.go(1));
if (currentIndex < entryList.size() - 2) {
entryList.get(currentIndex + 1);
forwardButton.setDisable(false);
} else {
entryList.get(history.getCurrentIndex());
forwardButton.setDisable(true);
backButton.setDisable(false);
}
return entryList.get(currentIndex).getUrl();
}
private void addButtonsAvailabilityListeners(JButton backButton, JButton forwardButton) {
Platform.runLater(
() ->
myEngine
.getLoadWorker()
.stateProperty()
.addListener(
(ov, oldState, newState) -> {
if (newState == Worker.State.SUCCEEDED) {
final WebHistory history = myEngine.getHistory();
boolean isGoBackAvailable = history.getCurrentIndex() > 0;
boolean isGoForwardAvailable =
history.getCurrentIndex() < history.getEntries().size() - 1;
ApplicationManager.getApplication()
.invokeLater(
() -> {
backButton.setEnabled(isGoBackAvailable);
forwardButton.setEnabled(isGoForwardAvailable);
});
}
}));
}
public Browser(final Stage stage) {
// 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(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;
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
toggleHelpTopics.setOnAction(
(ActionEvent t) -> {
webEngine.executeScript("toggle_visibility('help_topics')");
});
smallView.setPrefSize(120, 80);
// handle popup windows
webEngine.setCreatePopupHandler(
(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(
(Change<? extends Entry> c) -> {
c.next();
c.getRemoved()
.stream()
.forEach(
(e) -> {
comboBox.getItems().remove(e.getUrl());
});
c.getAddedSubList()
.stream()
.forEach(
(e) -> {
comboBox.getItems().add(e.getUrl());
});
});
// set the behavior for the history combobox
comboBox.setOnAction(
(Event ev) -> {
int offset = comboBox.getSelectionModel().getSelectedIndex() - history.getCurrentIndex();
history.go(offset);
});
// process page loading
webEngine
.getLoadWorker()
.stateProperty()
.addListener(
(ObservableValue<? extends State> ov, State oldState, State newState) -> {
toolBar.getChildren().remove(toggleHelpTopics);
if (newState == State.SUCCEEDED) {
JSObject win = (JSObject) webEngine.executeScript("window");
win.setMember("app", new JavaApp());
if (needDocumentationButton) {
toolBar.getChildren().add(toggleHelpTopics);
}
}
});
// adding context menu
final ContextMenu cm = new ContextMenu();
MenuItem cmItem1 = new MenuItem("Print");
cm.getItems().add(cmItem1);
toolBar.addEventHandler(
MouseEvent.MOUSE_CLICKED,
(MouseEvent e) -> {
if (e.getButton() == MouseButton.SECONDARY) {
cm.show(toolBar, e.getScreenX(), e.getScreenY());
}
});
// processing print job
cmItem1.setOnAction(
(ActionEvent e) -> {
PrinterJob job = PrinterJob.createPrinterJob();
if (job != null) {
webEngine.print(job);
job.endJob();
}
});
// load the home page
webEngine.load("http://www.cnn.com");
// add components
getChildren().add(toolBar);
getChildren().add(browser);
}
private BorderPane webViewScene() {
url = new TextField();
url.setPrefWidth(800);
browser = new WebView();
engine = browser.getEngine();
url.setText(fileUrl);
engine.load(fileUrl);
history = browser.getEngine().getHistory();
backButton = new Button(null, new ImageView(new Image("res/BrowserIcons/back.png")));
backButton.setOnAction(
(ActionEvent e) -> {
if (!checkIntConnection(defaultUrl)) {
alert();
} else browser.getEngine().load(goBack());
});
backButton.addEventHandler(
MouseEvent.MOUSE_ENTERED, event -> backButton.setEffect(new DropShadow()));
backButton.addEventHandler(MouseEvent.MOUSE_EXITED, event -> backButton.setEffect(null));
forwardButton = new Button(null, new ImageView(new Image("res/BrowserIcons/forward.png")));
forwardButton.setOnAction(
(ActionEvent e) -> {
if (!checkIntConnection(defaultUrl)) {
alert();
} else browser.getEngine().load(goForward());
});
forwardButton.addEventHandler(
MouseEvent.MOUSE_ENTERED, event -> forwardButton.setEffect(new DropShadow()));
forwardButton.addEventHandler(MouseEvent.MOUSE_EXITED, event -> forwardButton.setEffect(null));
reloadButton = new Button(null, new ImageView(new Image("res/BrowserIcons/reload.png")));
reloadButton.setOnAction(
event -> {
if (!checkIntConnection(defaultUrl)) {
alert();
} else browser.getEngine().reload();
});
reloadButton.addEventHandler(
MouseEvent.MOUSE_ENTERED, event -> reloadButton.setEffect(new DropShadow()));
reloadButton.addEventHandler(MouseEvent.MOUSE_EXITED, event -> reloadButton.setEffect(null));
goButton = new Button(null, new ImageView(new Image("res/BrowserIcons/go.jpg")));
goButton.setOnAction(
event -> {
// adding the http or https prefix if user didn't type it
if (!checkIntConnection(defaultUrl)) {
alert();
} else {
if (url.getText().length() > 7
&& (url.getText(0, 7).equals("http://") || url.getText(0, 8).equals("https://"))) {
browser.getEngine().load(url.getText());
} else if (url.getText().length() > 7 && !url.getText(0, 7).equals("http://")) {
browser.getEngine().load("http://" + url.getText());
} else {
browser.getEngine().load("https://" + url.getText());
}
}
});
goButton.addEventHandler(
MouseEvent.MOUSE_ENTERED, event -> goButton.setEffect(new DropShadow()));
goButton.addEventHandler(MouseEvent.MOUSE_EXITED, event -> goButton.setEffect(null));
webHistoryComboBox = new ComboBox();
webHistoryComboBox.setPromptText("Web History");
webHistoryComboBox.setPrefWidth(200);
webHistoryComboBox.setOnAction(
event -> {
// Navigate to the link in the history index
int offset =
webHistoryComboBox.getSelectionModel().getSelectedIndex() - history.getCurrentIndex();
history.go(offset);
});
// Displying browse history in a combo box
history
.getEntries()
.addListener(
(ListChangeListener<WebHistory.Entry>)
c -> {
c.next();
for (WebHistory.Entry e : c.getRemoved())
webHistoryComboBox.getItems().remove(e.getUrl());
for (WebHistory.Entry e : c.getAddedSubList())
webHistoryComboBox.getItems().add(e.getUrl());
});
// Enabling and Disabling back and forward buttons
browser
.getEngine()
.getLoadWorker()
.stateProperty()
.addListener(
(observable, oldValue, newValue) -> {
if (!browser.getEngine().getHistory().getEntries().isEmpty()) {
int index = browser.getEngine().getHistory().getCurrentIndex();
url.setText(browser.getEngine().getHistory().getEntries().get(index).getUrl());
if (index == 0) {
backButton.setDisable(true);
} else {
backButton.setDisable(false);
}
if (browser.getEngine().getHistory().getEntries().size() == 1) {
forwardButton.setDisable(true);
} else if (index < browser.getEngine().getHistory().getEntries().size() - 2) {
forwardButton.setDisable(false);
} else if (index < browser.getEngine().getHistory().getEntries().size() - 1) {
forwardButton.setDisable(false);
} else if (index == browser.getEngine().getHistory().getEntries().size() - 1) {
forwardButton.setDisable(true);
}
}
});
progress.setPrefSize(25, 25);
progress.visibleProperty().bind(browser.getEngine().getLoadWorker().runningProperty());
BorderPane border = new BorderPane();
HBox topBar = new HBox();
topBar.setAlignment(Pos.CENTER);
topBar.setSpacing(10);
topBar.setPadding(new Insets(10, 10, 10, 10));
topBar
.getChildren()
.addAll(
progress, reloadButton, url, goButton, backButton, forwardButton, webHistoryComboBox);
border.setTop(topBar);
border.setCenter(browser);
border.setPrefHeight(Screen.getPrimary().getVisualBounds().getHeight());
border.setPrefWidth(Screen.getPrimary().getVisualBounds().getWidth());
return border;
}
