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Symbian3/PDK/Source/GUID-ADC42872-9A5B-50F2-8A33-6621A8F7C177.dita
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Tue, 30 Mar 2010 11:56:28 +0100
changeset 5 f345bda72bc4
parent 1 25a17d01db0c
child 14 578be2adaf3e
permissions -rw-r--r--
Week 12 contribution of PDK documentation_content. See release notes for details. Fixes Bug 2054, Bug 1583, Bug 381, Bug 390, Bug 463, Bug 1897, Bug 344, Bug 1319, Bug 394, Bug 1520, Bug 1522, Bug 1892"
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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 task
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  PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">
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<task id="GUID-ADC42872-9A5B-50F2-8A33-6621A8F7C177" xml:lang="en"><title>Handling
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Feature Notification </title><shortdesc>How to handle notification of changes to a feature using <codeph>RFeatureControl</codeph>. </shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody>
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<context id="GUID-96D657EC-032D-535E-926A-924CB5D07324"><p>To handle notification
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of changes to a feature using <xref href="GUID-F6AAAC24-4A62-383A-86C6-2E46335C3FD4.dita"><apiname>RFeatureControl</apiname></xref>, take the
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following steps. </p><p/><p>  <xref href="GUID-623C4183-00F0-36B0-AE1F-5C5EDCAF1B3D.dita"><apiname>MFeatureObserver</apiname></xref> is an
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interface which you implement to react to change notification in whatever
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way you choose. It has two member functions which you must implement:   </p><p/><p><xref href="GUID-428DC6B1-6847-313F-BEEF-A8EC2442BA57.dita"><apiname>HandleNotifyChange()</apiname></xref> and</p><p><xref href="GUID-F737E1D7-5B67-345D-8290-E31F214D55E8.dita"><apiname>HandleNotifyError()</apiname></xref></p><p/><p>&lt;api-item&gt;HandleNotifyChange()&lt;/api-item&gt; takes two arguments: </p><p/><p>a <xref href="GUID-5F29338F-1073-3160-8FDD-E3FD4932F009.dita"><apiname>TFeatureChangeType</apiname></xref> representing
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the kind of change you want to be notified of, and</p><p>a <xref href="GUID-80C51259-F2C4-3877-97B4-EC0C85DE93DE.dita"><apiname>TFeatureEntry</apiname></xref> object
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representing the feature you want to be notified of when it is change. </p><p/><p> <xref href="GUID-F737E1D7-5B67-345D-8290-E31F214D55E8.dita"><apiname>HandleNotifyError()</apiname></xref> takes
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one argument, an integer: this integer represents one of the Symbian platform
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error codes. Any error in the notifier causes the notifier to stop handling
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notifications. Your implementation should respond to each of the error types
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you expect to occur.   </p> </context>
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</taskbody><related-links>
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<link href="GUID-2E33854B-5725-55DE-9B03-7A3100F5A5B5.dita"><linktext>Requesting
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feature                 notification</linktext></link>
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<link href="GUID-926862C4-5E13-5896-B959-0D408C748AB5.dita"><linktext>Cancelling
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feature                 notification</linktext></link>
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<link href="GUID-B71AC5E3-8AA8-55AD-916F-9E873926011B.dita"><linktext>Feature Manager
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Collection Overview</linktext></link>
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<link href="GUID-910780A3-D6AB-5EE2-966A-5F228AC5804F.dita"><linktext>Feature Manager
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Notification Tutorials</linktext></link>
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</related-links></task>
MCL/sftools/depl/docscontent