Using the JavaFX UI Controls - JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients - page 267

alertPopup.getContent().add(contentPane);

BorderPane.setAlignment(okButton, Pos.CENTER);
BorderPane.setMargin(okButton, new Insets(10, 0, 10, 0));
return alertPopup;
}

Here are some relevant notes about the createAlertPopup() method code:
A •

String argument containing the HTML to be displayed is passed into the method.

• A

Popup instance is created. A StackPane , including a BorderPane that has a Label containing
the HTML, is added to the Popup .
The

•

onAction handler in the OK button causes the Popup to hide from view, as you
experienced in Step 34 of the exercise.

Let's move on to the final UI control in the StarterApp program.

Using a WebView
The WebView control is a web browser that you can embed in JavaFX applications. As you experienced in Steps 34
and 35 of the exercise, the WebView control shown in Figure 6-14 automatically displays a randomly selected web page
when the tab labeled PasswordField is selected.
In the following snippet from Listing 6-5, the WebView created earlier is assigned to the Tab 's content and
properties are assigned, including the lambda expression that is called when the tab is selected.

Tab webViewTab = new Tab("WebView");
webViewTab.setContent(webView);
webViewTab.setClosable(false);
webViewTab.setOnSelectionChanged(e -> {
String randomWebSite = model.getRandomWebSite();
if (webViewTab.isSelected()) {
webView.getEngine().load(randomWebSite);
System.out.println("WebView tab is selected, loading: "
+ randomWebSite);
}
});

The code in the onSelectionChanged() method earlier calls a method in the StarterAppModel class to get the
URL of a randomly selected web site. The getEngine() method of the WebView is then invoked to get the WebEngine
instance associated with the WebView . The load() method of the WebEngine is invoked, passing a String that contains
the randomly selected URL, which causes the WebView to display the web page retrieved from that URL. The following
snippet contains the relevant code from the StarterAppModel class:

public String getRandomWebSite() {
String[] webSites = {
" http://javafx.com " ,
" http://fxexperience.com " ,
" http://steveonjava.com " ,
" http://javafxpert.com " ,
" http://pleasingsoftware.blogspot.com " ,