--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/datasourcemodules/bluetoothgpspositioningmodule/btgpspsy/src/Utils/BTGPSEnvChangeHandler.cpp	Fri Jun 04 10:34:15 2010 +0100
@@ -0,0 +1,150 @@
+// Copyright (c) 2004-2009 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 FILES
+#include <e32std.h>
+#include <bacntf.h>
+
+#include "BTGPSEnvChangeHandler.h"
+#include "BTGPSRequestManager.h"
+#include "BTGPSLogging.h"
+
+// EXTERNAL DATA STRUCTURES
+
+// EXTERNAL FUNCTION PROTOTYPES  
+
+// CONSTANTS
+
+// MACROS
+
+// LOCAL CONSTANTS AND MACROS
+
+// MODULE DATA STRUCTURES
+
+// LOCAL FUNCTION PROTOTYPES
+
+// FORWARD DECLARATIONS
+
+// ============================= LOCAL FUNCTIONS ===============================
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+
+// -----------------------------------------------------------------------------
+// CBTGPSEnvChangeHandler::NewL
+// -----------------------------------------------------------------------------
+CBTGPSEnvChangeHandler* CBTGPSEnvChangeHandler::NewL(
+        CBTGPSRequestManager& aRequestManager)
+    {
+    CBTGPSEnvChangeHandler* self = new (ELeave) CBTGPSEnvChangeHandler(
+        aRequestManager);
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop();
+    return self;
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSEnvChangeHandler::~CBTGPSEnvChangeHandler
+// -----------------------------------------------------------------------------
+CBTGPSEnvChangeHandler::~CBTGPSEnvChangeHandler()
+    {
+    if(iEnvChangeNotifier!=NULL)
+        {
+        iEnvChangeNotifier->Cancel();
+        }
+    delete iEnvChangeNotifier;
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSEnvChangeHandler::ConstructL
+// -----------------------------------------------------------------------------
+void CBTGPSEnvChangeHandler::ConstructL()
+    {
+    iEnvChangeNotifier = 
+        CEnvironmentChangeNotifier::NewL(
+            CActive::EPriorityStandard, 
+            TCallBack(NotifierCallBack, this));
+    
+    iEnvChangeNotifier->Start();
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSEnvChangeHandler::CBTGPSEnvChangeHandler
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+CBTGPSEnvChangeHandler::CBTGPSEnvChangeHandler(
+        CBTGPSRequestManager& aRequestManager) : 
+    iRequestManager(aRequestManager)
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSEnvChangeHandler::NotifierCallBack
+// -----------------------------------------------------------------------------
+TInt CBTGPSEnvChangeHandler::NotifierCallBack(TAny* aPtr)
+    {
+    reinterpret_cast<CBTGPSEnvChangeHandler*>(aPtr)->HandleEnvironmentChange();
+    return KErrNone;
+    }
+
+// -----------------------------------------------------------------------------
+// CBTGPSEnvChangeHandler:HandleEnvironmentChange
+// 
+// Currently we are only interested of system time change. This function is also
+// called once immediately after enviroment change notifier object is
+// constructed.
+//
+// NOTE: This function can be used to detect changes in phone power supply
+// in case this information is needed to change the functionality depending of
+// whether external power supply is connected or not.
+//
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CBTGPSEnvChangeHandler::HandleEnvironmentChange()
+    {
+    TRACESTRING("CBTGPSEnvChangeHandler::HandleEnvironmentChange start...")
+    // This function is called once always after construction, in this
+    // case we don't even need to check reason
+    // --> "Filter out" this initialization
+    if (!iEnvChangeNotifierInitialized)
+        {
+        iEnvChangeNotifierInitialized = ETrue;
+        return;
+        }
+
+    // Get reason why this function was called
+    TInt envChange = iEnvChangeNotifier->Change();
+
+    // If reason was cancel, or system time change flag is not on, then we
+    // can return.
+     if (envChange == KErrCancel || !(envChange & EChangesSystemTime))
+        {
+        return;
+        }
+
+    // If system time really changed, then we set last fix time as 0
+    iRequestManager.SystemTimeChange();
+    TRACESTRING("CBTGPSEnvChangeHandler::HandleEnvironmentChange end")
+    }
+
+//  End of File
+
+
+