Symbian3/SDK/Source/GUID-2131E679-779D-427D-BD41-47D9949A8749.dita
author Dominic Pinkman <dominic.pinkman@nokia.com>
Tue, 20 Jul 2010 12:00:49 +0100
changeset 13 48780e181b38
parent 7 51a74ef9ed63
permissions -rw-r--r--
Week 28 contribution of SDK documentation content. See release notes for details. Fixes bugs Bug 1897 and Bug 1522.
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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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-->
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<!DOCTYPE concept
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="GUID-2131E679-779D-427D-BD41-47D9949A8749" xml:lang="en"><title>Disabling
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hardware key shortcuts</title><shortdesc>This document describes how to disable hardware key shortcuts when
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none of the items in a list are highlighted.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
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<p>If an application has item-specific hardware key shortcuts, they must be
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disabled when there are no visible highlights in lists.</p>
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<ul>
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<li><p>Applications must retrieve the list highlighted state using the <xref href="GUID-019B2B8B-AFAA-3806-B796-3D91B4D79361.dita#GUID-019B2B8B-AFAA-3806-B796-3D91B4D79361/GUID-951D2BAE-C567-362C-9F55-5C3969144F89"><apiname>CEikMenuBar::ItemSpecificCommandsEnabled()</apiname></xref> function.
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The function returns <codeph>ETrue</codeph> when item-specific commands are
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enabled in the menu bar (that is, a list has highlighted options) and <codeph>EFalse</codeph> when
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they are disabled (the list does not have highlighted options). </p><note>Symbian^3
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supports focused items on hybrid devices when the UI is manipulated through
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key events. For details, see <xref href="GUID-28A0E021-C702-4AAF-9C64-B60B09B40176.dita#GUID-28A0E021-C702-4AAF-9C64-B60B09B40176/GUID-D556C1B0-9D9A-4219-BFF8-5CDBA10677CA">Moving
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in hybrid devices</xref></note><p>For example, considering that an application
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supports single-tap, the following code enables the delete action only if
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the call to <codeph>ItemSpecificCommandsEnabled</codeph> indicates that an
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item is currently focused. </p><codeblock xml:space="preserve">TBool CLogsRecentListView::ProcessKeyEventL(
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const TKeyEvent&amp; aKeyEvent,
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TEventCode aType )
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{
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  if( aType == EEventKey )
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  {
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    if( <b>MenuBar()-&gt;ItemSpecificCommandsEnabled()</b> &amp;&amp; aKeyEvent.iCode == EKeyBackspace )
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    {
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      HandleCommandL( ELogsCmdMenuDelete );
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      return ETrue;
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    }
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  }
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}
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</codeblock></li>
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</ul>
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</conbody></concept>