Remove button to hide in systray, minimize the window will do it

src/com/sheepit/client/standalone/GuiSwing.java

@@ -30,6 +30,8 @@ import java.awt.Toolkit;
 import java.awt.TrayIcon;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowStateListener;
 import java.net.URL;
 
 import javax.swing.ImageIcon;
@@ -82,6 +84,15 @@ public class GuiSwing extends JFrame implements Gui {
 		
 		try {
 			sysTray = SystemTray.getSystemTray();
+			if (SystemTray.isSupported()) {
+				addWindowStateListener(new WindowStateListener() {
+					public void windowStateChanged(WindowEvent e) {
+						if (e.getNewState() == ICONIFIED) {
+							hideToTray();
+						}
+					}
+				});
+			}
 		}
 		catch (UnsupportedOperationException e) {
 			sysTray = null;
@@ -242,6 +253,9 @@ public class GuiSwing extends JFrame implements Gui {
 		if (sysTray != null && SystemTray.isSupported()) {
 			sysTray.remove(trayIcon);
 			setVisible(true);
+			setExtendedState(getExtendedState() & ~JFrame.ICONIFIED & JFrame.NORMAL); // for toFront and requestFocus to actually work
+			toFront();
+			requestFocus();
 		}
 	}
 	

src/com/sheepit/client/standalone/swing/activity/Working.java

@@ -134,15 +134,6 @@ public class Working implements Activity {
 		parent.getContentPane().add(pauseButton, constraints);
 		
 		++currentRow;
-		//Add hide button if os supports it
-		if (SystemTray.isSupported()) {
-			JButton hideButton = new JButton("Hide window");
-			hideButton.addActionListener(new HideAction());
-			constraints.gridx = 1;
-			constraints.gridy = currentRow;
-			parent.getContentPane().add(hideButton, constraints);
-		}
-		
 		exitAfterFrame = new JButton("Exit after this frame");
 		constraints.gridx = 2;
 		constraints.gridy = currentRow;
@@ -230,15 +221,6 @@ public class Working implements Activity {
 		}
 	}
 	
-	class HideAction implements ActionListener {
-		@Override
-		public void actionPerformed(ActionEvent e) {
-			if (parent != null) {
-				parent.hideToTray();
-			}
-		}
-	}
-        
 	class ExitAfterAction implements ActionListener {
 		@Override
 		public void actionPerformed(ActionEvent e) {