<?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-DB2E0959-C24E-4E6E-BC6D-064B91BDE662" xml:lang="en"><title>Checking
for touch support at runtime</title><shortdesc>The Symbian platform now includes <parmname>AknLayoutUtils::PenEnabled()</parmname> to
check for touch support at runtime to allow for reduced run-time memory consumption
if the device does not support touch.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
<p>Typical cases where <parmname>AknLayoutUtils::PenEnabled()</parmname> might
be useful include:</p>
<ul>
<li><p>In the component’s constructor to skip the creation of touch-only component
controls.</p></li>
<li><p>In the component’s <parmname>HandleResourceChange</parmname>, create
touch-only component controls if the layout is switched from a non-touchable
to a touchable one. Touch-only component controls should not be deleted.</p></li>
<li><p>In the component’s drawing code.</p></li>
</ul>
<note><p><codeph>AknLayoutUtils::PenEnabled()</codeph> is supported from S60
3rd Edition, FP1, onwards.</p></note>
<codeblock xml:space="preserve">void CMyAppContainer::ConstructL( const TRect&amp; aRect )
    {
    CreateWindowL();
    SetRect( aRect );
 
    // If the device supports touch, construct long tap detector
    if ( AknLayoutUtils::PenEnabled() )
        {
        iLongTapDetector = CAknLongTapDetector::NewL( this );
        }
    ActivateL();
    }</codeblock>
<note><p>You cannot use <codeph>AknLayoutUtils::PenEnabled()</codeph> in <codeph>.rss</codeph> resource
files.</p></note>
</conbody></concept>