<?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 concept

  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

<concept id="GUID-95DD1440-01C9-4997-8DD4-FFD33D7DEAFF" xml:lang="en"><title>Application-specific

events</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p><xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Control_Environment/CCoeAppUiClass.html#%3a%3aCCoeAppUi%3a%3aHandleApplicationSpecificEventL%28TInt%2cconst%20TWsEvent%20%26amp%3b%29" format="application/java-archive"><parmname>CCoeAppUi:HandleApplicationSpecificEventL()</parmname></xref> is

called for application-specific events where event codes are from <xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Window_Server/TKeyEventStruct.html" format="application/java-archive"><parmname>EEventUser</parmname></xref> upwards in <parmname>TEventCode</parmname>. You can define

a data structure to be delivered in the window server event. The data can

be accessed through a pointer, which can be obtained by calling<xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Window_Server/TWsEventClass.html#%3a%3aTWsEvent%3a%3aEventData%28%29const" format="application/java-archive"><parmname> TWsEvent::EventData()</parmname></xref>. The maximum event

data size is defined as <xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Window_Server/TWsEventClass.html#%3a%3aTWsEvent%3a%3aEWsEventDataSize" format="application/java-archive"><parmname>EWsEventDataSize</parmname></xref>. </p>

<codeblock id="GUID-80335267-13AB-49C8-8895-B6598F5D59A4" xml:space="preserve">void HandleApplicationSpecificEventL(TInt aType,const TWsEvent&amp; aEvent)

</codeblock>

<p>Code example: </p>

<p>First define a data structure for the event data:</p>

<codeblock id="GUID-BBC9DCFA-F46C-4AC9-BC7F-B1A2DB39963A" xml:space="preserve">class TEventsEventType

    {

    public:

        // Event iData

        TBufC< TWsEvent::EWsEventDataSize> data;

        };

</codeblock>

<p>Then create an event and send it to all window groups:</p>

<codeblock id="GUID-0E8CE3D4-19F2-46D6-9A22-9A7EBC73F5C5" xml:space="preserve">// Create a window server event

TWsEvent event;

TEventsEventType eventType;

// Set event data. eventType.data = KData;

event.SetType( ETestEvent1 ); // set event type

event.SetTimeNow(); // set the event time

event.SetHandle( iWsSession.WsHandle() ); // set window server handle

*( TEventsEventType* )( event.EventData() ) = eventType; // set event data

// Send the created event

User::LeaveIfError( iWsSession.SendEventToAllWindowGroups( event ) );

</codeblock>

<p>Catch the event using the following method:</p>

<codeblock id="GUID-1BF859E7-EC92-4BDA-AFCE-DEB82854C8D7" xml:space="preserve">void CEventsAppUi::HandleApplicationSpecificEventL(TInt aType,const TWsEvent&amp; aEvent)

    {

    // Check the event type

    if( aType == ETestEvent1 )

        {

        // Cast to TEventsEventType

        TEventsEventType event;

        event = *( TEventsEventType* )aEvent.EventData();

        // Print the data

        iEikonEnv->InfoMsg( event.data );

        }

        // Call the base class implementation

        CEikAppUi::HandleApplicationSpecificEventL( aType, aEvent );

    }

</codeblock>