examples/Telephony/ETel3rdPartyExample/PhoneMonitoring/CSignalInfo.cpp

// Copyright (c) 2005-2009 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 "CSignalInfo.h"

CSignalInfo* CSignalInfo::NewL(MExecAsync* aController)
        {
        CSignalInfo* self = new(ELeave) CSignalInfo(aController);
        CleanupStack::PushL(self);
        self->ConstructL();
        CleanupStack::Pop(self);
        return self;
        }

CSignalInfo::~CSignalInfo()
        {
        Cancel();
        }

void CSignalInfo::DoStartRequestL()
        {
        _LIT(KDummyAnswerPanic, "CSignalInfo Get Method");
        __ASSERT_ALWAYS(!IsActive(), User::Panic(KDummyAnswerPanic, 1));
        iRequestNotify = EFalse;
        
        // Retrieves the phone's current signal strength via the aDes argument.
        iTelephony->GetSignalStrength(iStatus, iSignalStrengthV1Pckg);
        SetActive();
        }

CSignalInfo::CSignalInfo(MExecAsync* aController)
        : CISVAPIAsync(aController, KSignalInfo),
          iSignalStrengthV1Pckg(iSignalStrengthV1)
        {
        // Empty method
        }

void CSignalInfo::ConstructL()
        {
        // Empty method
        }

void CSignalInfo::RunL()
        {
        if(iStatus != KErrNone)
                {
                iConsole->Printf(KError);
                
                // Print the error status code
                iConsole->Printf(_L("%d\n"), iStatus.Int());
                }
        else
                {
                TInt32 strength = iSignalStrengthV1.iSignalStrength;
                TInt8 bars = iSignalStrengthV1.iBar;
                if (iRequestNotify)
                        {
                        iConsole->ClearScreen();
                        iConsole->Printf(_L("~*THIS IS A NOTIFICATION*~\n"));
                        }
                iConsole->Printf(KSignalStrengthMsg);
                iConsole->Printf(_L("There are %d bars!\n"), bars);
                iConsole->Printf(_L("Signal Strength is %d!\n"), strength);
                if (iRequestNotify)
                        {
                        DoRequestNotificationL();
                        }
                else
                        {
                        ExampleComplete();
                        }
                }
        }

void CSignalInfo::DoRequestNotificationL()
   {
        // Panic if this object is already performing an asynchronous operation. 
        // Application will panic if you call SetActive() on an already active object.
        _LIT( KNotifyPanic, "CSignalInfo Notify Method" );
        __ASSERT_ALWAYS( !IsActive(), User::Panic( KNotifyPanic, 1 ));
        iRequestNotify = ETrue;
        
        // Registers interest in receiving change notifications for events.
        iTelephony->NotifyChange(       iStatus,
                                                                CTelephony::ESignalStrengthChange,
                                                                iSignalStrengthV1Pckg );
        SetActive();
        }

void CSignalInfo::DoCancel()
        {
        // Cancels an outstanding asynchronous request.
        iTelephony->CancelAsync(CTelephony::ESignalStrengthChangeCancel);
        }

---