Make StatusTrayIcon work with JavaFX

* Remove Swing dependencies from StatusTrayIcon
* Pass a stage to the constructor
* Adjust focus change handler and reactivation
* Add IconUtil#loadAWTCompatible for BufferedImage loading

client/src/main/java/envoy/client/ui/IconUtil.java

@@ -1,9 +1,13 @@
 package envoy.client.ui;
 
+import java.awt.image.BufferedImage;
+import java.io.IOException;
 import java.util.EnumMap;
 import java.util.EnumSet;
 import java.util.logging.Level;
 
+import javax.imageio.ImageIO;
+
 import javafx.scene.image.Image;
 
 import envoy.client.data.Settings;
@@ -145,6 +149,23 @@ public class IconUtil {
 		return icons;
 	}
 
+	/**
+	 * Loads a buffered image from the resource folder which is compatible with AWT.
+	 *
+	 * @param path the path to the icon inside the resource folder
+	 * @return the loaded image
+	 * @since Envoy Client v0.2-beta
+	 */
+	public static BufferedImage loadAWTCompatible(String path) {
+		BufferedImage image = null;
+		try {
+			image = ImageIO.read(IconUtil.class.getResource(path));
+		} catch (IOException e) {
+			EnvoyLog.getLogger(IconUtil.class).log(Level.WARNING, String.format("Could not load image at path %s: ", path), e);
+		}
+		return image;
+	}
+
 	/**
 	 * This method should be called if the display of an image depends upon the
 	 * currently active theme.<br>
@@ -154,7 +175,7 @@ public class IconUtil {
 	 * @return the theme specific folder
 	 * @since Envoy Client v0.1-beta
 	 */
-	public static String themeSpecificSubFolder() {
+	private static String themeSpecificSubFolder() {
 		return Settings.getInstance().isUsingDefaultTheme() ? Settings.getInstance().getCurrentTheme() + "/" : "";
 	}
 }

client/src/main/java/envoy/client/ui/StatusTrayIcon.java

@@ -2,15 +2,14 @@ package envoy.client.ui;
 
 import java.awt.*;
 import java.awt.TrayIcon.MessageType;
-import java.awt.event.WindowAdapter;
+
-import java.awt.event.WindowEvent;
+import javafx.application.Platform;
-import java.util.logging.Level;
+import javafx.stage.Stage;
 
 import envoy.client.event.MessageCreationEvent;
 import envoy.data.Message;
 import envoy.event.EventBus;
 import envoy.exception.EnvoyException;
-import envoy.util.EnvoyLog;
 
 /**
  * Project: <strong>envoy-client</strong><br>
@@ -39,18 +38,16 @@ public class StatusTrayIcon {
 	 * Creates a {@link StatusTrayIcon} with the Envoy logo, a tool tip and a pop-up
 	 * menu.
 	 *
-	 * @param focusTarget the {@link Window} which focus determines if message
+	 * @param stage the stage which focus determines if message
-	 *                    notifications are displayed
+	 *              notifications are displayed
 	 * @throws EnvoyException if the currently used OS does not support the System
 	 *                        Tray API
-	 * @since Envoy Client v0.2-alpha
+	 * @since Envoy Client v0.2-beta
 	 */
-	public StatusTrayIcon(Window focusTarget) throws EnvoyException {
+	public StatusTrayIcon(Stage stage) throws EnvoyException {
 		if (!SystemTray.isSupported()) throw new EnvoyException("The Envoy tray icon is not supported.");
 
-		final ClassLoader	loader	= Thread.currentThread().getContextClassLoader();
+		trayIcon = new TrayIcon(IconUtil.loadAWTCompatible("/icons/envoy_logo.png"), "Envoy");
-		final Image			img		= Toolkit.getDefaultToolkit().createImage(loader.getResource("envoy_logo.png"));
-		trayIcon = new TrayIcon(img, "Envoy Client");
 		trayIcon.setImageAutoSize(true);
 		trayIcon.setToolTip("You are notified if you have unread messages.");
 
@@ -62,18 +59,11 @@ public class StatusTrayIcon {
 
 		trayIcon.setPopupMenu(popup);
 
-		// Only display messages if the chat window is not focused
+		// Only display messages if the stage is not focused
-		focusTarget.addWindowFocusListener(new WindowAdapter() {
+		stage.focusedProperty().addListener((ov, onHidden, onShown) -> displayMessages = ov.getValue());
-
-			@Override
-			public void windowGainedFocus(WindowEvent e) { displayMessages = false; }
-
-			@Override
-			public void windowLostFocus(WindowEvent e) { displayMessages = true; }
-		});
 
 		// Show the window if the user clicks on the icon
-		trayIcon.addActionListener(evt -> { focusTarget.setVisible(true); focusTarget.requestFocus(); });
+		trayIcon.addActionListener(evt -> Platform.runLater(() -> { stage.show(); stage.requestFocus(); }));
 
 		// Start processing message events
 		// TODO: Handle other message types
@@ -93,7 +83,6 @@ public class StatusTrayIcon {
 		try {
 			SystemTray.getSystemTray().add(trayIcon);
 		} catch (final AWTException e) {
-			EnvoyLog.getLogger(StatusTrayIcon.class).log(Level.INFO, "Could not display StatusTrayIcon: ", e);
 			throw new EnvoyException("Could not attach Envoy tray icon to system tray.", e);
 		}
 	}