Invoking JavaScript from Java
- by Geertjan
Here's an Action class defined in Java. The Action class executes a script via the JavaFX WebEngine:
@NbBundle.Messages("CTL_AddBananasAction=Add Banana")
private class AddBananasAction extends AbstractAction {
public AddBananasAction() {
super(Bundle.CTL_AddBananasAction());
}
@Override
public void actionPerformed(ActionEvent e) {
Platform.runLater(new Runnable() {
@Override
public void run() {
webengine.executeScript("addBanana(' " + newBanana + " ') ");
}
});
}
}How does the 'executescript' call know where to find the JavaScript file? Well, earlier in the code, the WebEngine loaded an HTML file, where the JavaScript file was registered:
WebView view = new WebView();
view.setMinSize(widthDouble, heightDouble);
view.setPrefSize(widthDouble, heightDouble);
webengine = view.getEngine();
URL url = getClass().getResource("home.html");
webengine.load(url.toExternalForm());
Finally, here's a skeleton 'addBanana' method, which is invoked via the Action class shown above:
function addBanana(user){
statustext.text(user);
}
By the way, if you have your JavaScript and CSS embedded within your
HTML file, the code navigator combines all three into the same window,
which is kind of cool:
