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+<?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-0C19D3F1-CF60-4760-8A77-242E14647738" xml:lang="en"><title>Touch
+UI observer interfaces</title><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>To support the touch functionality in existing UI components too, S60 5th
+Edition introduced new observer interfaces to the existing components. These
+are:</p>
+<ul>
+<li><p><i>Navigation decorator observer</i></p><p>The navigation decorator
+observer interface is used in the navigation pane. The interface receives
+an event indicating that the decorator’s right or left arrow has been tapped
+(or the navi label), and then the observer implementation can perform an action
+(for example, raise the volume or change focus to the next tab). This might
+be useful if you implement custom controls to be included in the navigation
+control.</p><p>It is defined by <codeph>MAknNaviDecoratorObserver</codeph>.
+The observer can be set by <codeph>CAknNavigationDecorator::SetNaviDecoratorObserver</codeph>.</p> </li>
+<li><p><i>Long tap detector</i></p><p>The long tap detector (<codeph>CAknLongTapDetector</codeph>)
+is an Avkon component that an application or control can use to receive long
+tap events.</p><p>The long tap handler must inherit from <codeph>MAknLongTapDetectorCallBack</codeph> and
+implement the <codeph>HandleLongTapEventL</codeph> call back function for
+long tap events.</p> <p>When the stylus is held down in the same position,
+an animation starts in about 0.15 s to show that the long tap functionality
+has started. Animation is provided by AVKON and cannot be changed by the application
+or control. However, animation can be turned off using the class <codeph>CAknLongTapDetector</codeph> in
+the Touch UI utilities API.</p> <p>For implementation infomation, see the <xref href="GUID-92018B6B-3CBB-434D-9E61-F271C67E98E3.dita">Touch UI utilities API specification</xref>.</p></li>
+<li><p><i>Double-click support in lists</i></p><p>In order to receive double-click
+events from a list or grid, the object that wishes to be informed must implement
+and register the <codeph>MEikListBoxObserver</codeph> interface via <codeph>CEikListBox::SetListBoxObserver</codeph>. </p></li>
+<li><p><i>Title pane touch observer</i></p><p>The title pane touch observer
+enables you to provide functionality for title pane touch events. For implementation
+information, see the <xref href="GUID-B876D548-FD40-4369-B328-7427002B4851.dita">Title
+pane touch observer API specification</xref>.</p></li>
+</ul>
+</conbody></concept>
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