Use FrameClosingEvents in WindowManager.

Change-Id: Iba5bc03ad28b1bb28def0b7a1f27c9cf4e2fe7d0
Reviewed-on: http://gerrit.dmdirc.com/3813
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

src/com/dmdirc/ui/WindowManager.java

 package com.dmdirc.ui;
 
 import com.dmdirc.CustomWindow;
+import com.dmdirc.DMDircMBassador;
 import com.dmdirc.FrameContainer;
 import com.dmdirc.Precondition;
-import com.dmdirc.interfaces.FrameCloseListener;
+import com.dmdirc.events.FrameClosingEvent;
 import com.dmdirc.interfaces.ui.FrameListener;
 import com.dmdirc.util.collections.ListenerList;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
+import net.engio.mbassy.listener.Handler;
+
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 import static com.google.common.base.Preconditions.checkState;
     private final List<FrameContainer> rootWindows = new CopyOnWriteArrayList<>();
     /** A list of frame listeners. */
     private final ListenerList listeners = new ListenerList();
-    /** Listener for frame close events. */
-    private final FrameCloseListener closeListener = new CloseListener();
 
     /**
      * Creates a new instance of {@link WindowManager}.
      */
     @Inject
-    public WindowManager() {
+    public WindowManager(final DMDircMBassador eventBus) {
+        eventBus.subscribe(this);
     }
 
     /**
         rootWindows.add(window);
 
         fireAddWindow(window, focus);
-
-        window.addCloseListener(closeListener);
     }
 
     /**
         parent.addChild(child);
 
         fireAddWindow(parent, child, focus);
-
-        child.addCloseListener(closeListener);
     }
 
     /**
         }
     }
 
-    /**
-     * Frame close listener that removes the window from this manager.
-     */
-    private class CloseListener implements FrameCloseListener {
-
-        @Override
-        public void windowClosing(final FrameContainer window) {
-            removeWindow(window);
-        }
-
+    @Handler
+    public void frameClosing(final FrameClosingEvent event) {
+        removeWindow(event.getContainer());
     }
 
 }

test/com/dmdirc/ui/WindowManagerTest.java

 package com.dmdirc.ui;
 
 import com.dmdirc.CustomWindow;
+import com.dmdirc.DMDircMBassador;
 import com.dmdirc.FrameContainer;
 import com.dmdirc.interfaces.ui.FrameListener;
 
     @Mock private FrameContainer container;
     @Mock private FrameContainer child;
     @Mock private FrameContainer grandchild;
+    @Mock private DMDircMBassador eventBus;
     private WindowManager manager;
 
     @Before
     public void setup() {
-        manager = new WindowManager();
+        manager = new WindowManager(eventBus);
     }
 
     @Test