Added system tray icon support

G-Earth/src/main/java/gearth/GEarth.java

@@ -5,6 +5,7 @@ import gearth.misc.Cacher;
 import gearth.misc.UpdateChecker;
 import gearth.misc.listenerpattern.ObservableObject;
 import gearth.ui.GEarthController;
+import gearth.ui.GEarthTrayIcon;
 import gearth.ui.themes.Theme;
 import gearth.ui.themes.ThemeFactory;
 import gearth.ui.titlebar.TitleBarConfig;
@@ -41,7 +42,6 @@ public class GEarth extends Application {
     public void start(Stage primaryStage) throws Exception{
         main = this;
         stage = primaryStage;
-
         FXMLLoader loader = new FXMLLoader(getClass().getResource("/gearth/ui/G-Earth.fxml"));
         Parent root;
         try {
@@ -120,7 +120,8 @@ public class GEarth extends Application {
             stage.getScene().getStylesheets().add(GEarth.class.getResource(String.format("/gearth/ui/themes/%s/styling.css", theme.internalName())).toExternalForm());
 
             stage.getIcons().clear();
-            stage.getIcons().add(new Image(GEarth.class.getResourceAsStream(String.format("/gearth/ui/themes/%s/logoSmall.png", theme.overridesLogo() ? theme.internalName() : defaultTheme.internalName()))));
+            final Image image = new Image(GEarth.class.getResourceAsStream(String.format("/gearth/ui/themes/%s/logoSmall.png", theme.overridesLogo() ? theme.internalName() : defaultTheme.internalName())));
+            stage.getIcons().add(image);
             stage.setTitle((theme.overridesTitle() ? theme.title() : defaultTheme.title()) + " " + GEarth.version);
 
             controller.infoController.img_logo.setImage(new Image(GEarth.class.getResourceAsStream(
@@ -131,7 +132,11 @@ public class GEarth extends Application {
             )));
             controller.infoController.version.setText(stage.getTitle());
 //        });
+        GEarthTrayIcon.updateOrCreate(image);
+    }
 
+    public GEarthController getController() {
+        return controller;
     }
 
     public static String[] args;

G-Earth/src/main/java/gearth/ui/GEarthTrayIcon.java

@@ -0,0 +1,105 @@
+package gearth.ui;
+
+import gearth.GEarth;
+import gearth.services.extension_handler.extensions.GEarthExtension;
+import gearth.services.extension_handler.extensions.extensionproducers.ExtensionProducerFactory;
+import gearth.services.extension_handler.extensions.implementations.network.NetworkExtensionServer;
+import javafx.application.Platform;
+import javafx.embed.swing.SwingFXUtils;
+import javafx.scene.image.Image;
+import javafx.stage.Stage;
+
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+/**
+ * Adds a {@link TrayIcon} to the {@link SystemTray} for this G-Earth instance.
+ *
+ * @author Dorving
+ */
+public final class GEarthTrayIcon {
+
+    private static final String TO_FRONT_LABEL = "To front";
+    private static final String TO_BACK_LABEL = "To back";
+
+    private static PopupMenu menu;
+
+    public static void updateOrCreate(Image image) {
+
+        if (!SystemTray.isSupported())
+            return;
+
+        final NetworkExtensionServer server = ExtensionProducerFactory.getExtensionServer();
+        final BufferedImage awtImage = SwingFXUtils.fromFXImage(image, null);
+        final String appTitle = "G-Earth " + GEarth.version + " (" + server.getPort() + ")";
+
+        final Optional<TrayIcon> trayIcon = Stream.of(SystemTray.getSystemTray().getTrayIcons())
+                .filter(other -> Objects.equals(other.getToolTip(), appTitle))
+                .findFirst();
+        if (trayIcon.isPresent()) {
+            EventQueue.invokeLater(() -> trayIcon.get().setImage(awtImage));
+        } else {
+            menu = new PopupMenu();
+            menu.add(createToFrontOrBackMenuItem());
+            menu.addSeparator();
+            menu.addSeparator();
+            menu.add(createInstallMenuItem());
+            try {
+                SystemTray.getSystemTray().add(new TrayIcon(awtImage, appTitle, menu));
+            } catch (AWTException e) {
+                e.printStackTrace();
+                menu = null;
+            }
+        }
+    }
+
+    private static MenuItem createToFrontOrBackMenuItem() {
+        final MenuItem showMenuItem = new MenuItem(TO_FRONT_LABEL);
+        showMenuItem.addActionListener(e -> {
+            if (Objects.equals(showMenuItem.getLabel(), TO_FRONT_LABEL)) {
+                showMenuItem.setLabel(TO_BACK_LABEL);
+                Platform.runLater(() -> GEarth.main.getController().getStage().toFront());
+            } else {
+                showMenuItem.setLabel(TO_FRONT_LABEL);
+                Platform.runLater(() -> GEarth.main.getController().getStage().toBack());
+            }
+        });
+        return showMenuItem;
+    }
+
+    private static MenuItem createInstallMenuItem() {
+        final MenuItem showMenuItem = new MenuItem("Install Extension...");
+        showMenuItem.addActionListener(e ->
+                Optional.ofNullable(GEarth.main.getController())
+                        .map(c -> c.extensionsController)
+                        .ifPresent(c -> Platform.runLater(() -> {
+                            final Stage stage = c.parentController.getStage();
+                            final boolean isOnTop = stage.isAlwaysOnTop();
+                            stage.setAlwaysOnTop(true); // bit of a hack to force stage to front
+                            c.installBtnClicked(null);
+                            stage.setAlwaysOnTop(isOnTop);
+                        })));
+        return showMenuItem;
+    }
+
+    /**
+     * Adds the argued extension as a menu item to {@link #menu}.
+     *
+     * @param extension the {@link GEarthExtension} to add to the {@link #menu}.
+     */
+    public static void addExtension(GEarthExtension extension) {
+
+        if (menu == null)
+            return;
+
+        final MenuItem menuItem = new MenuItem("Show "+extension.getTitle());
+        EventQueue.invokeLater(() -> menu.insert(menuItem, 2));
+        menuItem
+                .addActionListener(e -> Platform.runLater(() -> extension.getClickedObservable().fireEvent()));
+        extension.getDeletedObservable()
+                .addListener(() -> EventQueue.invokeLater(() -> menu.remove(menuItem)));
+    }
+}

G-Earth/src/main/java/gearth/ui/subforms/extensions/ExtensionsController.java

@@ -8,6 +8,7 @@ import gearth.services.extension_handler.extensions.implementations.network.exec
 import gearth.services.extension_handler.extensions.implementations.network.executer.ExtensionRunner;
 import gearth.services.extension_handler.extensions.implementations.network.executer.ExtensionRunnerFactory;
 import gearth.services.g_python.GPythonShell;
+import gearth.ui.GEarthTrayIcon;
 import gearth.ui.SubForm;
 import gearth.ui.subforms.extensions.logger.ExtensionLogger;
 import gearth.ui.translations.LanguageBundle;
@@ -18,6 +19,7 @@ import javafx.scene.control.*;
 import javafx.scene.layout.GridPane;
 import javafx.scene.layout.VBox;
 import javafx.stage.FileChooser;
+import javafx.stage.Stage;
 
 import java.io.File;
 
@@ -54,9 +56,10 @@ public class ExtensionsController extends SubForm {
     protected void onParentSet() {
         ExtensionItemContainerProducer producer = new ExtensionItemContainerProducer(extensioncontainer, scroller);
         extensionHandler = new ExtensionHandler(getHConnection());
-        extensionHandler.getObservable().addListener((e -> {
+        extensionHandler.getObservable().addListener((e -> Platform.runLater(() -> {
-            Platform.runLater(() -> producer.extensionConnected(e));
+            producer.extensionConnected(e);
-        }));
+            GEarthTrayIcon.addExtension(e);
+        })));
 
         //noinspection OptionalGetWithoutIsPresent
         networkExtensionsProducer