--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/taskswitcher/utils/inc/tswindowgroupsobserver.h	Mon Sep 13 13:26:33 2010 +0300
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of "Eclipse Public License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.eclipse.org/legal/epl-v10.html".
+ *
+ * Initial Contributors:
+ * Nokia Corporation - initial contribution.
+ *
+ * Contributors:
+ *
+ * Description :
+ *
+ */
+#ifndef TSWINDOWGROUPSOBSERVER_H
+#define TSWINDOWGROUPSOBSERVER_H
+
+#include "tsresourcemanager.h"
+
+/**
+ * Interface declare mathods to notify about window server events
+ */
+class MTsWindowGroupsObserver
+{
+public:
+    /**
+     * Method notidy about window group changes.
+     * @param rsc - resource manager
+     * @param wgs - list of window groups associated with running applications
+     */
+    virtual void HandleWindowGroupChanged(MTsResourceManager &rsc, 
+                                          const TArray<RWsSession::TWindowGroupChainInfo> & wgs) =0;
+};
+
+/**
+ * Interface declare methods to subscribe windo server events
+ */
+class MTsWindowGroupsMonitor
+{
+public:
+    /**
+     * Method make subscription for window server events
+     * @param observer - events observer
+     */
+    virtual void SubscribeL(MTsWindowGroupsObserver & observer) =0;
+    
+    /**
+     * Method cancel subscription for window server events
+     * @param observer - events observer
+     */
+    virtual void Cancel(MTsWindowGroupsObserver &) =0;
+};
+
+/**
+ * Window server observer implementation. Class automaticly subscribe / cancel subscription
+ * at construction / destruction level.
+ * 
+ */
+class CTsWindowGroupsObserver: public CBase,
+                               public MTsWindowGroupsObserver
+{
+public:
+    /**
+     * Destructor
+     * Function automaticly cancel subscrption to window server events
+     */
+    ~CTsWindowGroupsObserver();
+    
+protected:
+    /**
+     * First phase constructor
+     */
+    CTsWindowGroupsObserver(MTsWindowGroupsMonitor &);
+    
+    /**
+     * Second phase constructor.
+     * Function automaticly subscribe window server events
+     */
+    void BaseConstructL();
+
+private:
+    MTsWindowGroupsMonitor & mMonitor;
+};
+
+/**
+ * Window server monitor implementation.
+ */
+class CTsWindowGroupsMonitor: public CActive, 
+                              public MTsWindowGroupsMonitor
+                              
+{
+public:
+    /**
+     * Two phase constructor
+     */
+    static CTsWindowGroupsMonitor* NewL(MTsResourceManager &);
+    
+    /**
+     * Destructor
+     */
+    ~CTsWindowGroupsMonitor();
+    
+    /**
+     * @see MTsWindowGroupsMonitor::SubscribeL
+     */
+    void SubscribeL(MTsWindowGroupsObserver &);
+    
+    /**
+     * @see MTsWindowGroupsMonitor::Cancel
+     */
+    void Cancel(MTsWindowGroupsObserver &);
+
+protected:
+    /**
+     * @see CActive::RunL
+     */
+    void RunL();
+    
+    /**
+     * @see CActive::DoCancel
+     */
+    void DoCancel();
+    
+    /**
+     * @see CActive::RunError
+     */
+    TInt RunError(TInt error);
+
+private:
+    /**
+     * First phase constructor
+     */
+    CTsWindowGroupsMonitor(MTsResourceManager &);
+    
+    /**
+     * Second phase constructor
+     */
+    void ConstructL();
+    
+    /**
+     * Function subscribe for event to window server and activate object
+     */
+    void Subscribe();
+    
+    /**
+     * Function provide window server event to observers
+     */
+    void ProvideEventL();
+    
+    /**
+     * Function provide window server event to observer
+     */
+    void ProvideEventL(TWsEvent, MTsWindowGroupsObserver &);
+
+private:
+    /**
+     * Registry of subscribed observers
+     */
+    RPointerArray<MTsWindowGroupsObserver> mObservers;
+    
+    /**
+     * Resources manager
+     */
+    MTsResourceManager &mResources;
+    
+    /**
+     * Monitor window group
+     */
+    RWindowGroup mWg;
+};
+#endif //TSWINDOWGROUPSOBSERVER_H