<?xml version="1.0" encoding="utf-8"?>

<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

<!-- This component and the accompanying materials are made available under the terms of the License 

"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: 

-->

<!DOCTYPE task

  PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">

<task id="GUID-2DC4EAD5-98D3-5B17-AEBD-6ADE481CBD94" xml:lang="en"><title>Call

in Progress Tutorial</title><shortdesc>This tutorial describes how to get the call progress with the telephony

API for applications. </shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody>

<context>The client applications can determine the status of voice, data and

fax calls with the <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony</apiname></xref> functions.</context>

<steps id="GUID-3321492D-D51F-5047-9C62-4E0951726010">

<step id="GUID-1C4E0B81-25D0-5645-9C85-F2EFAB23BBD8"><cmd/>

<info>create a new instance of <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony</apiname></xref>  </info>

</step>

<step id="GUID-0D3DCBA1-B00C-5EFD-A905-CCF7EE4DFE4C"><cmd/>

<info>use<xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony::GetIndicator()</apiname></xref> to

get the call progress information </info>

<info>The function returns a <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>TIndicatorV1</apiname></xref> object

that contains the call progress information </info>

</step>

<step id="GUID-82FEA69E-58DB-53B2-AD6D-3C7EC5A17BD0"><cmd/>

<info>pass the enumeration <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony::EGetIndicatorCancel</apiname></xref> to

cancel the aynchronous request </info>

</step>

<step id="GUID-1A45FD91-3793-5322-829F-4498F841E6E2"><cmd/>

<info>use <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony::EIndicatorChange</apiname></xref> to

get the notification of any changes in the call progress information </info>

</step>

<step id="GUID-780B4933-9C44-50FC-B020-368B5150A05D"><cmd/>

<info>pass the enumeration <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony::EIndicatorChangeCancel</apiname></xref> to

cancel the notification request </info>

</step>

</steps>

<example id="GUID-B43C210D-813A-58D6-8ADE-1FEF7C5FBE58"><title>Call in progress

example</title> <codeblock id="GUID-8A109B25-F01C-5495-A109-E4424DD3A24E" xml:space="preserve">#include &lt;e32base.h&gt;

#include <Etel3rdParty.h>

class CClientApp : public CActive

    { 

private:

    CTelephony* iTelephony;

    CTelephony::TIndicatorV1 iIndicatorV1;

    CTelephony::TIndicatorV1Pckg iIndicatorV1Pckg;

public:

    CClientApp(CTelephony* aTelephony);

    void SomeFunction();

private:

    /*

       These are the pure virtual methods from CActive that  

       MUST be implemented by all active objects

       */

    void RunL();

    void DoCancel();

   };

CClientApp::CClientApp(CTelephony* aTelephony)

    : CActive(EPriorityStandard),

      iTelephony(aTelephony),

      iIndicatorV1Pckg(iIndicatorV1)

    {

    //default constructor

    }

void CClientApp::SomeFunction()

    {

    iTelephony->GetIndicator(iStatus, iIndicatorV1Pckg);

    SetActive();

    }

void CClientApp::RunL()

    {

    if(iStatus==KErrNone)

       {

       if(iIndicatorV1.iCapabilities & CTelephony::KIndCallInProgress)

          {

          // We can detect when a call is in progress

          if(iIndicatorV1.iIndicator & CTelephony::KIndCallInProgress)

             {} // A call is in progress

          else

             {} // A call is not in progress

          }

       else

          {} // We do not know whether a call is in progress

       }

    }

void CClientApp::DoCancel()

    {

    iTelephony->CancelAsync(CTelephony::EGetIndicatorCancel);

    }

</codeblock> </example>

</taskbody></task>