--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-0C19D3F1-CF60-4760-8A77-242E14647738.dita	Wed Mar 31 11:11:55 2010 +0100
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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 the UI components, following observer
+interfaces are provided:</p>
+<ul>
+<li><p><b>Navigation decorator observer</b> (<codeph>MAknNaviDecoratorObserver</codeph>)-
+It 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).
+Based on the event received, the observer implementation performs an action
+(for example, raise the volume or change focus to the next tab). This observer
+is useful when custom controls needs to be implemented  in the navigation
+control. The observer can be set using <codeph>CAknNavigationDecorator::SetNaviDecoratorObserver()</codeph>.</p> <p/> </li>
+<li><p><b>Long tap detector</b> (<codeph>CAknLongTapDetector</codeph>) - It
+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/finger 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 information, see the <xref href="GUID-92018B6B-3CBB-434D-9E61-F271C67E98E3.dita">Touch UI utilities API specification</xref>.</p></li>
+<li><p><b>Double-click support in lists</b> - To receive double-click events
+from a list or grid, the object that needs to be informed must implement and
+register the <codeph>MEikListBoxObserver</codeph> interface via <codeph>CEikListBox::SetListBoxObserver()</codeph>. </p>After
+registering, handle the <codeph>EEventItemDoubleClicked</codeph> event in<codeph>HandleListBoxEventL()</codeph> method. <p>If
+single click is enabled, <codeph>EEventItemSingleClicked</codeph> event should
+be handled instead.</p></li>
+<li><p><b>Title pane touch observer</b> - The title pane touch observer enables
+you to provide functionality for title pane touch events. For implementation
+information, see the <xref format="html" href="specs/guides/Title_Pane_Touch_Observer_API_Specification/Title_Pane_Touch_Observer_API_Specification.html" scope="peer">Title pane touch observer API specification</xref>.</p></li>
+</ul>
+</conbody></concept>
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