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

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

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

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

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->

    10 <!DOCTYPE concept

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

    12 <concept id="GUID-DB2E0959-C24E-4E6E-BC6D-064B91BDE662" xml:lang="en"><title>Checking

    13 for touch support at runtime</title><shortdesc>The Symbian platform now includes <parmname>AknLayoutUtils::PenEnabled()</parmname> to

    14 check for touch support at runtime to allow for reduced run-time memory consumption

    15 if the device does not support touch.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

    16 <p>Typical cases where <parmname>AknLayoutUtils::PenEnabled()</parmname> might

    17 be useful include:</p>

    18 <ul>

    19 <li><p>In the component’s constructor to skip the creation of touch-only component

    20 controls.</p></li>

    21 <li><p>In the component’s <parmname>HandleResourceChange</parmname>, create

    22 touch-only component controls if the layout is switched from a non-touchable

    23 to a touchable one. Touch-only component controls should not be deleted.</p></li>

    24 <li><p>In the component’s drawing code.</p></li>

    25 </ul>

    26 <note><p><codeph>AknLayoutUtils::PenEnabled()</codeph> is supported from S60

    27 3rd Edition, FP1, onwards.</p></note>

    28 <codeblock xml:space="preserve">void CMyAppContainer::ConstructL( const TRect&amp; aRect )

    29     {

    30     CreateWindowL();

    31     SetRect( aRect );

    32  

    33     // If the device supports touch, construct long tap detector

    34     if ( AknLayoutUtils::PenEnabled() )

    35         {

    36         iLongTapDetector = CAknLongTapDetector::NewL( this );

    37         }

    38     ActivateL();

    39     }</codeblock>

    40 <note><p>You cannot use <codeph>AknLayoutUtils::PenEnabled()</codeph> in <codeph>.rss</codeph> resource

    41 files.</p></note>

    42 </conbody></concept>