diff -r f742655b05bf -r d38647835c2e callcontinuity/vcchotrigger/src/vccsignallevelhandler.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/callcontinuity/vcchotrigger/src/vccsignallevelhandler.cpp	Wed Sep 01 12:29:57 2010 +0100
@@ -0,0 +1,319 @@
+/*
+* Copyright (c) 2007-2008 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:   Implementation of the base class of signal level handler
+*
+*/
+
+
+
+#include "vccsignallevelhandler.h"
+#include "vccsignallevelobserver.h"
+#include "rubydebug.h"
+
+
+// Min. signal strength in absolut dBm, i.e. the value
+// in real world is -110 dBm (so quite weak).
+static const TInt32 KStrengthMin = 110;
+
+// ---------------------------------------------------------------------------
+// C++ destructor.
+// ---------------------------------------------------------------------------
+//
+CVccSignalLevelHandler::~CVccSignalLevelHandler()
+    {
+    // Cancel any outstanding requests.
+    Cancel();
+
+    iStrength = 0;
+    }
+
+// ---------------------------------------------------------------------------
+// Symbian second-phase constructor.
+// ---------------------------------------------------------------------------
+//
+void CVccSignalLevelHandler::ConstructL()
+    {
+    CTimer::ConstructL();
+    }
+
+// ---------------------------------------------------------------------------
+// C++ constructor.
+// ---------------------------------------------------------------------------
+//
+CVccSignalLevelHandler::CVccSignalLevelHandler(
+    MVccSignalLevelObserver& aObserver,
+    const TSignalLevelParams& aParams )
+    : CTimer( EPriorityStandard ),
+    iObserver( aObserver ),
+    iParams( aParams )
+    {
+    CActiveScheduler::Add( this );
+    }
+
+// ---------------------------------------------------------------------------
+// Star signal level observing.
+// ---------------------------------------------------------------------------
+//
+void CVccSignalLevelHandler::StartL()
+    {
+    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::StartL" );
+
+    if ( !iNotificationsOn )
+        {
+        EnableNotificationsL();
+        iNotificationsOn = ETrue;
+        }
+
+    RUBY_DEBUG0( " -call Cancel()" );
+    Cancel();
+
+    RUBY_DEBUG0( " -call GetStrength()" );
+    GetStrength();
+
+    RUBY_DEBUG1( " -iStrength = %d, set op = EOperationGet \
+                 state = EStrengthUnknown", iStrength );
+    
+    iOperation = EOperationGet;
+
+    iState = EStrengthUnknown;
+
+    RUBY_DEBUG0( " -call SetActive()" );
+    SetActive();
+    }
+
+// ---------------------------------------------------------------------------
+// Stop signal level observing.
+// ---------------------------------------------------------------------------
+//
+void CVccSignalLevelHandler::Stop()
+    {
+    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::Stop ");
+
+    DisableNotifications();
+
+    iNotificationsOn = EFalse;
+
+    iStrength = 0;
+
+    Cancel();
+    }
+
+// ---------------------------------------------------------------------------
+// Set new parameters.
+// ---------------------------------------------------------------------------
+//
+void CVccSignalLevelHandler::SetParams( const TSignalLevelParams& aParams )
+    {
+    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::SetParams" );
+    iParams = aParams;
+    }
+
+// ---------------------------------------------------------------------------
+// Handles getting the signal strength and notifying the observer about
+// strength changes.
+// ---------------------------------------------------------------------------
+//
+void CVccSignalLevelHandler::RunL()
+    {
+    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::RunL" );
+
+    // Zero (0) is not acceptable.
+    if ( !iStrength )
+        {
+        RUBY_DEBUG0( " -0 strength not acceptable, setting to KStrengthMin");
+        iStrength = KStrengthMin;
+        }
+
+    RUBY_DEBUG3( " -iStrength = %d iState = %d iOp = %d", iStrength, iState, iOperation );
+
+    switch ( iOperation )
+        {
+        case EOperationGet:
+            {
+
+            // We are in the Get-mode to get the signal strength.
+            // If the strength is < than the high level (== the strength
+            // is good), start timer to check if we are still in good level
+            // after the timer completes.
+            // The same is done if we have a low level (== bad).
+
+            RUBY_DEBUG0( " -EOperationGet");
+
+            if ( iStrength <= iParams.iHighLevel && iStrength > 0 )
+                {
+                RUBY_DEBUG0( "  set state = EStrengthHigh, op = EOperationWait" );
+
+                After( iParams.iHighTimeout );
+                iState = EStrengthHigh;
+                iOperation = EOperationWait;
+                }
+            else if ( iStrength >= iParams.iLowLevel )
+                {
+                RUBY_DEBUG0( "  set state = EStrengtLow, op = EOperationWait" );
+                After( iParams.iLowTimeout );
+                iState = EStrengthLow;
+                iOperation = EOperationWait;
+                }
+            else
+                {
+                RUBY_DEBUG0( "  strength between low and high, set op = EOperationNone" );
+
+                iOperation = EOperationNone;
+                // PCLint
+                }
+            break;
+            }
+
+        case EOperationWait:
+            {
+
+            // Timer has completed. Check the signal level again.
+
+            RUBY_DEBUG0( " -EOperationWait" );
+            RUBY_DEBUG0( "  set op = EOperationComplete" );
+            GetStrength();
+
+            SetActive();
+
+            iOperation = EOperationComplete;
+
+            break;
+            }
+
+        case EOperationComplete:
+            {
+            // Checking signal strength is now done.
+            // Notify our observer (if needed).
+
+            RUBY_DEBUG1( " -EOperationComplete, iStrength = %d", iStrength );
+
+            // Do we have a good signal level?
+            if ( iStrength <= iParams.iHighLevel && iStrength > 0 && iState == EStrengthHigh )
+                {
+                RUBY_DEBUG0( " -if ( iStrength <= iParams.iHighLevel" );
+                NotifyChanges( iStrength, MVccSignalLevelObserver::ESignalClassNormal );
+                }
+            // Or do we have a bad signal level?
+            else if ( iStrength >= iParams.iHighLevel && iState == EStrengthLow )
+                {
+                RUBY_DEBUG0( " -else if ( iStrength >= iParams.iHighLevel" );
+                NotifyChanges( iStrength, MVccSignalLevelObserver::ESignalClassWeak );
+                }
+            else
+                {
+                // PCLint
+                }
+
+            iOperation = EOperationNone;
+
+            break;
+            }
+
+        default:
+            {
+            break;
+            }
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// Handles signal strength changes notified by the subsystem
+// (either the WLAN or the GSM).
+// ---------------------------------------------------------------------------
+//
+void CVccSignalLevelHandler::StrengthChanged()
+    {
+
+    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::StrengthChanged" );
+
+    // The zero (0) is not good.
+    if ( !iStrength )
+        {
+        iStrength = KStrengthMin;
+        }
+
+    RUBY_DEBUG3( " -iStrength = %d, iState = %d, iOp = %d",
+                             iStrength, iState, iOperation);
+
+    // Check in which direction the signal strength changed
+    // and start the timeout timer to see if the signal level
+    // stays at that (new) level.
+
+    RUBY_DEBUG1( " -iHighLevel = %d", iParams.iHighLevel );
+    RUBY_DEBUG1( " -iLowLevel = %d", iParams.iLowLevel );
+    if ( iStrength <= iParams.iHighLevel && iStrength > 0 )  // && 
+        //( iState == EStrengthLow || iState == EStrengthUnknown ) )
+        {
+        // Cancel outstanding timer in all the cases
+        Cancel();
+        // We have a good level after a bad one.
+
+        RUBY_DEBUG0( " -call After( hightimeout ), set state = High, op = Wait");
+        After( iParams.iHighTimeout );
+        iState = EStrengthHigh;
+        iOperation = EOperationWait;
+        }
+    else if ( iStrength >= iParams.iLowLevel )  //&& 
+            //( iState == EStrengthHigh || iState == EStrengthUnknown ) )
+        {
+        // Cancel outstanding timer in all the cases
+        Cancel();
+        // We have a bad level after a good one.
+
+        RUBY_DEBUG0( " -call After( lowtimeout ), set state = Low, op = Wait");
+
+        After ( iParams.iLowTimeout );
+        iState = EStrengthLow;
+        iOperation = EOperationWait;
+        }
+    else
+        {
+        RUBY_DEBUG0( "-EOperationNone ");
+        iOperation = EOperationNone;
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// Cancel outstanding requests.
+// ---------------------------------------------------------------------------
+//
+void CVccSignalLevelHandler::DoCancel()
+    {
+    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::DoCancel" );
+    switch ( iOperation )
+        {
+        case EOperationWait:
+            {
+            RUBY_DEBUG0( "EOperationWait" );
+            CTimer::DoCancel();
+
+            break;
+            }
+
+        case EOperationGet:
+            // fall-through intended here
+        case EOperationComplete:
+            {
+            RUBY_DEBUG0( "EOperationGet / EOperationComplete" );
+            CancelGetStrength();
+
+            break;
+            }
+
+        default:
+            {
+            break;
+            }
+        }
+    }