Symbian3/SDK/Source/GUID-92018B6B-3CBB-434D-9E61-F271C67E98E3.dita
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- This component and the accompanying materials are made available under the terms of the License 
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"Eclipse Public License v1.0" which accompanies this distribution, 
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
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<!-- Initial Contributors:
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	Nokia Corporation - initial contribution.
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Contributors: 
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-->  <!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"><concept id="GUID-92018B6B-3CBB-434D-9E61-F271C67E98E3" xml:lang="en"><title>Touch
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UI utilities API</title><shortdesc>The Touch UI utilities API is used for detecting long-tap events
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and showing an animation for them. </shortdesc><prolog><metadata><keywords></keywords></metadata></prolog><conbody>
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<p>A long tap, also called a touch down and hold event, means that the user
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holds the stylus down on the screen at the same point for a long time.</p>
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<fig id="GUID-1E6C16F9-51AA-45CC-8E50-AB5E51DB9E4E">
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<title>Long-tap event used for opening a stylus pop-up menu</title>
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<image href="GUID-78989363-A405-4A1D-8F13-DC52FE6FAD80_d0e50615_href.png" scale="40" placement="inline"></image>
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</fig>
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<p>The Touch UI utilities API can be used in all GUI applications. It is a
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library API that provides an interface for constructing and using the long-tap
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detector component.</p>
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<p>For user experience guidelines on the long-tap component, see <xref href="GUID-C11AF871-56C8-4EA4-A1E0-E2B23372EF84.dita">Touch
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down and hold</xref>.</p>
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<p>For the Touch UI utilities API classes and header files, see Classes and Definitions.</p>
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<p>For implementation information, see <xref href="GUID-A15EDC87-A6EF-40D8-AA78-B52449465FEA.dita">Receiving
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long tap events</xref>.</p>
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<section id="GUID-139D3102-1273-4F4D-9239-309677968281"><title>Error handling</title><p>The
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leave mechanism of the Symbian OS environment is used for handling memory
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exhaustion.</p></section>
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<section id="GUID-A4320820-D2A9-44C1-B2F0-C47A8C6CED6B"><title>Constraints</title><p>This
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API is valid for all touch enabled Symbian platforms.</p></section>
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<section id="GUID-C1463788-923F-4AF2-884B-3B16C93E7536"><title>Emulator support</title><p>This
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API is fully supported in the WINS/WINSCW emulator environment.</p></section>
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</conbody></concept>