Можно ли спрятать JavaFX приложение в трей?

Эти 3 вопроса взаимосвязаны с вопросом о реализации одного проекта, но были распилены. Перед вами третий.
Второй, первый.
Есть GUI интерфейс который как запускается, так и выключается. И есть две операции, которые периодически выполняются. Причем одна маловесна, вторая до жути прожорлива.
Можно ли настроить окно JavaFX так, чтобы оно скрывалось в трей при нажатии крестика. (Не сворачивалось а именно в трей уходило)?

Ответ

Пример использования трея AWT + JavaFX:
https://gist.github.com/jewelsea/e231e89e8d36ef4e5d8a
import javafx.application.*; import javafx.geometry.Pos; import javafx.scene.*; import javafx.scene.control.Label; import javafx.scene.layout.*; import javafx.scene.paint.Color; import javafx.stage.*;
import javax.imageio.ImageIO; import java.io.IOException; import java.net.URL; import java.text.*; import java.util.*;
// Java 8 code public class JavaFXTrayIconSample extends Application {
// one icon location is shared between the application tray icon and task bar icon. // you could also use multiple icons to allow for clean display of tray icons on hi-dpi devices. private static final String iconImageLoc = "http://icons.iconarchive.com/icons/scafer31000/bubble-circle-3/16/GameCenter-icon.png";
// application stage is stored so that it can be shown and hidden based on system tray icon operations. private Stage stage;
// a timer allowing the tray icon to provide a periodic notification event. private Timer notificationTimer = new Timer();
// format used to display the current time in a tray icon notification. private DateFormat timeFormat = SimpleDateFormat.getTimeInstance();
// sets up the javafx application. // a tray icon is setup for the icon, but the main stage remains invisible until the user // interacts with the tray icon. @Override public void start(final Stage stage) { // stores a reference to the stage. this.stage = stage;
// instructs the javafx system not to exit implicitly when the last application window is shut. Platform.setImplicitExit(false);
// sets up the tray icon (using awt code run on the swing thread). javax.swing.SwingUtilities.invokeLater(this::addAppToTray);
// out stage will be translucent, so give it a transparent style. stage.initStyle(StageStyle.TRANSPARENT);
// create the layout for the javafx stage. StackPane layout = new StackPane(createContent()); layout.setStyle( "-fx-background-color: rgba(255, 255, 255, 0.5);" ); layout.setPrefSize(300, 200);
// this dummy app just hides itself when the app screen is clicked. // a real app might have some interactive UI and a separate icon which hides the app window. layout.setOnMouseClicked(event -> stage.hide());
// a scene with a transparent fill is necessary to implement the translucent app window. Scene scene = new Scene(layout); scene.setFill(Color.TRANSPARENT);
stage.setScene(scene); }
/** * For this dummy app, the (JavaFX scenegraph) content, just says "hello, world". * A real app, might load an FXML or something like that. * * @return the main window application content. */ private Node createContent() { Label hello = new Label("hello, world"); hello.setStyle("-fx-font-size: 40px; -fx-text-fill: forestgreen;"); Label instructions = new Label("(click to hide)"); instructions.setStyle("-fx-font-size: 12px; -fx-text-fill: orange;");
VBox content = new VBox(10, hello, instructions); content.setAlignment(Pos.CENTER);
return content; }
/** * Sets up a system tray icon for the application. */ private void addAppToTray() { try { // ensure awt toolkit is initialized. java.awt.Toolkit.getDefaultToolkit();
// app requires system tray support, just exit if there is no support. if (!java.awt.SystemTray.isSupported()) { System.out.println("No system tray support, application exiting."); Platform.exit(); }
// set up a system tray icon. java.awt.SystemTray tray = java.awt.SystemTray.getSystemTray(); URL imageLoc = new URL( iconImageLoc ); java.awt.Image image = ImageIO.read(imageLoc); java.awt.TrayIcon trayIcon = new java.awt.TrayIcon(image);
// if the user double-clicks on the tray icon, show the main app stage. trayIcon.addActionListener(event -> Platform.runLater(this::showStage));
// if the user selects the default menu item (which includes the app name), // show the main app stage. java.awt.MenuItem openItem = new java.awt.MenuItem("hello, world"); openItem.addActionListener(event -> Platform.runLater(this::showStage));
// the convention for tray icons seems to be to set the default icon for opening // the application stage in a bold font. java.awt.Font defaultFont = java.awt.Font.decode(null); java.awt.Font boldFont = defaultFont.deriveFont(java.awt.Font.BOLD); openItem.setFont(boldFont);
// to really exit the application, the user must go to the system tray icon // and select the exit option, this will shutdown JavaFX and remove the // tray icon (removing the tray icon will also shut down AWT). java.awt.MenuItem exitItem = new java.awt.MenuItem("Exit"); exitItem.addActionListener(event -> { notificationTimer.cancel(); Platform.exit(); tray.remove(trayIcon); });
// setup the popup menu for the application. final java.awt.PopupMenu popup = new java.awt.PopupMenu(); popup.add(openItem); popup.addSeparator(); popup.add(exitItem); trayIcon.setPopupMenu(popup);
// create a timer which periodically displays a notification message. notificationTimer.schedule( new TimerTask() { @Override public void run() { javax.swing.SwingUtilities.invokeLater(() -> trayIcon.displayMessage( "hello", "The time is now " + timeFormat.format(new Date()), java.awt.TrayIcon.MessageType.INFO ) ); } }, 5_000, 60_000 );
// add the application tray icon to the system tray. tray.add(trayIcon); } catch (java.awt.AWTException | IOException e) { System.out.println("Unable to init system tray"); e.printStackTrace(); } }
/** * Shows the application stage and ensures that it is brought ot the front of all stages. */ private void showStage() { if (stage != null) { stage.show(); stage.toFront(); } }
public static void main(String[] args) throws IOException, java.awt.AWTException { // Just launches the JavaFX application. // Due to way the application is coded, the application will remain running // until the user selects the Exit menu option from the tray icon. launch(args); } }
Объяснение почему awt:
https://toster.ru/q/221896
1. Есть ль альтернатива AWT-шным средствам работы с треем в Java 8? Да. Через пень-колоду-нативные методы (обращающиеся к вызовам ОС). Как, я понял, копать нужно в сторону SWT и иже с ними. Да так что проще заюзать AWT (для моей задачи). 2. Можно ли средствами JavaFX 8 работать с треем не прибегая к AWT/SWING? Нет. JavaFX 8 не поддерживает работу с треем. Возможно, поддержка работы с треем будет добавлена в 9й версии.
Ссылка на stackoverflow.com по данному вопросу:
https://stackoverflow.com/questions/12571329/javafx-app-in-system-tray