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

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

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     4 "Eclipse Public License v1.0" which accompanies this distribution, 

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     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

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    10 <!DOCTYPE concept

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

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

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

    14 <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

    15 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

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

    17 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

    18 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>

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

    20 </codeblock>

    21 <p>Code example: </p>

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

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

    24     {

    25     public:

    26         // Event iData

    27         TBufC< TWsEvent::EWsEventDataSize> data;

    28         };

    29 </codeblock>

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

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

    32 TWsEvent event;

    33 TEventsEventType eventType;

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

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

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

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

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

    39 // Send the created event

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

    41 </codeblock>

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

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

    44     {

    45     // Check the event type

    46     if( aType == ETestEvent1 )

    47         {

    48         // Cast to TEventsEventType

    49         TEventsEventType event;

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

    51         // Print the data

    52         iEikonEnv->InfoMsg( event.data );

    53         }

    54         // Call the base class implementation

    55         CEikAppUi::HandleApplicationSpecificEventL( aType, aEvent );

    56     }

    57 </codeblock>

    58 </conbody></concept>