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<!DOCTYPE concept

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<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>