diff -r d1dadafc5584 -r 26079c1bb561 taskswitcher/server/src/tswindowgroupsmonitorimp.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/taskswitcher/server/src/tswindowgroupsmonitorimp.cpp	Wed Oct 06 16:00:22 2010 +0300
@@ -0,0 +1,182 @@
+/*
+ * 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 :
+ *
+ */
+#include <apgwgnam.h>
+
+#include "tswindowgroupsmonitorimp.h"
+#include "tsrunningappstorageimp.h"
+#include "tsresourcemanager.h"
+
+
+const int KOrdinalPositionNoZOrder(-1);
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+CTsWindowGroupsMonitor* CTsWindowGroupsMonitor::NewL(MTsResourceManager &resources)
+{
+    CTsWindowGroupsMonitor* self = new (ELeave) CTsWindowGroupsMonitor(resources);
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+    return self;
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+CTsWindowGroupsMonitor::CTsWindowGroupsMonitor(MTsResourceManager &resources)
+:
+    CActive(EPriorityStandard),
+    iResources(resources)
+{
+    CActiveScheduler::Add(this);
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+void CTsWindowGroupsMonitor::ConstructL()
+{
+    
+    // Initial window group
+    iWg = RWindowGroup (iResources.WsSession());
+    User::LeaveIfError (iWg.Construct ((TUint32)&iWg, EFalse));
+    iWg.SetOrdinalPosition (KOrdinalPositionNoZOrder);
+    iWg.EnableReceiptOfFocus (EFalse);
+    
+    // Hide window
+    CApaWindowGroupName* wn = CApaWindowGroupName::NewLC(iResources.WsSession());
+    wn->SetHidden (ETrue);
+    wn->SetWindowGroupName (iWg);
+    CleanupStack::PopAndDestroy (wn);
+    
+    // Window group change event
+    User::LeaveIfError (iWg.EnableGroupListChangeEvents());
+    Subscribe();
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+CTsWindowGroupsMonitor::~CTsWindowGroupsMonitor()
+{
+    CActive::Cancel();
+    iWg.Close();
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+void CTsWindowGroupsMonitor::SubscribeL(MTsWindowGroupsObserver &observer)
+{
+    const TInt offset(iObservers.Find(&observer));
+    KErrNotFound == offset ? iObservers.InsertL(&observer, 0) : 
+                             User::Leave(KErrAlreadyExists);
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+void CTsWindowGroupsMonitor::Cancel(MTsWindowGroupsObserver & observer)
+{
+    const TInt offset(iObservers.Find(&observer));
+    if (KErrNotFound != offset) {
+        iObservers.Remove(offset);
+    }
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+void CTsWindowGroupsMonitor::RunL()
+{
+    User::LeaveIfError(iStatus.Int());
+    ProvideEventL();
+    Subscribe();
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+void CTsWindowGroupsMonitor::DoCancel()
+{
+    if (IsActive()) {
+        iResources.WsSession().EventReadyCancel();
+    }
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+TInt CTsWindowGroupsMonitor::RunError(TInt error)
+{
+    if (!IsActive() && KErrCancel != error) {
+        Subscribe();
+    }
+    return KErrNone;
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+void CTsWindowGroupsMonitor::Subscribe()
+{
+    iResources.WsSession().EventReady( &iStatus );
+    SetActive();
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+//
+void CTsWindowGroupsMonitor::ProvideEventL()
+{
+    TWsEvent wsEvent;
+    iResources.WsSession().GetEvent(wsEvent);
+    if( EEventWindowGroupListChanged == wsEvent.Type() )
+        {
+        
+        CTsRunningAppStorage *storage = CTsRunningAppStorage::NewLC();
+        
+        RArray<RWsSession::TWindowGroupChainInfo> filteredWgInfo, fullWgInfo;
+        CleanupClosePushL(filteredWgInfo);
+        CleanupClosePushL(fullWgInfo);
+        User::LeaveIfError(iResources.WsSession().WindowGroupList(0, &filteredWgInfo));
+        User::LeaveIfError(iResources.WsSession().WindowGroupList(&fullWgInfo));
+        storage->HandleWindowGroupChanged(iResources, 
+                                          fullWgInfo.Array(), 
+                                          filteredWgInfo.Array());
+        CleanupStack::PopAndDestroy( &fullWgInfo );
+        CleanupStack::PopAndDestroy( &filteredWgInfo );
+                
+        for( TInt iter(0); iter < iObservers.Count(); ++iter ) 
+            {
+            iObservers[iter]->HandleWindowGroupChanged( iResources, *storage );
+            }
+        CleanupStack::PopAndDestroy( storage );
+        
+        }
+}