diff -r aaeeca1f15af -r e8d784ac1a4b src/screensaveractivitymanager.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/screensaveractivitymanager.cpp	Wed Sep 01 12:30:40 2010 +0100
@@ -0,0 +1,131 @@
+// Copyright (c) 2007-2009 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:
+// CScreensaverActivityManager class
+// 
+//
+
+#include "screensaveractivitymanager.h"
+
+CScreensaverActivityManager* CScreensaverActivityManager::NewL(TInt aPriority)
+	{
+	CScreensaverActivityManager* self = new (ELeave) CScreensaverActivityManager(aPriority);
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	CActiveScheduler::Add(self);
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+CScreensaverActivityManager::CScreensaverActivityManager(TInt aPriority)
+	: CTimer(aPriority), iInactiveCallback(0,0), iActiveCallback(0,0), iState(EStNotActive)
+	{
+	}
+
+
+CScreensaverActivityManager::~CScreensaverActivityManager()
+	{
+	}
+
+
+void CScreensaverActivityManager::Start(TTimeIntervalSeconds aInterval,
+		TCallBack aInactiveCallback, TCallBack aActiveCallback) 
+	{  	
+	iInterval = aInterval;
+	iInactiveCallback = aInactiveCallback;
+	iActiveCallback = aActiveCallback;
+			
+	if	(iInterval.Int() < 0)
+		{
+		iInterval = TTimeIntervalSeconds(0);
+		}
+		
+	// Cancel outstanding timer, if any
+	CTimer::Cancel();
+	
+	if (iState == EStNotActive || iState == EStMonForInactivity) 
+		{
+		// Begin or contine monitoring for user inactivity
+		MonitorInactivity();
+		}
+	else 
+		{
+		// Continue monitoring for user activity
+		Inactivity(0); 
+		}
+	}
+
+     
+void CScreensaverActivityManager::SetInactivityTimeout(TTimeIntervalSeconds aInterval)
+	{
+	if (iState <= EStNotActive)
+    	{
+    	}
+	Start(aInterval, iInactiveCallback, iActiveCallback); 
+	}
+
+
+void CScreensaverActivityManager::MonitorInactivity()
+	{
+	if (User::InactivityTime() >= iInterval) 
+		{
+		// Already inactive enough, monitor for activity
+		iState = EStMonForActivity;
+		// Monitor for activity, set timer before callback to avoid missing any
+		// user activity should callback take some time.
+		Inactivity(0); 
+		// Inform client that the inactivity interval has ended.
+        (void) iInactiveCallback.CallBack();
+		}
+	else
+		{
+		// Monitor for Inactivity
+		iState = EStMonForInactivity;
+		Inactivity(iInterval);
+		}
+	}
+
+
+void CScreensaverActivityManager::RunL()
+	{
+	if (iStatus == KErrNone)
+		{
+		if (iState == EStMonForInactivity) 
+			{
+			// Looking for Inactivity, found it
+	   	    // Monitor for activity, set timer before callback to avoid missing 
+		    // any user activity should callback take some time.
+       		iState = EStMonForActivity;
+			Inactivity(0); 
+			// Inform client that the inactivity interval has ended.
+ 			(void) iInactiveCallback.CallBack();
+			}
+		else if (iState == EStMonForActivity)
+			{
+			// Looking for activity, found it
+			// Monitor for activity unless MonitorInactivity overrides it
+    		iState = EStMonForInactivity; 
+			MonitorInactivity();
+	        (void) iActiveCallback.CallBack();
+			}	
+		else
+            { // Must never happen, indicates internal state of object incorrect.
+            
+            }
+		}
+	}
+
+TBool CScreensaverActivityManager::IsMonitoringForActivity()
+    {
+    return ( iState == EStMonForActivity );
+    }