--- a/Symbian3/SDK/Source/GUID-ACC71D0D-32C4-5DAF-B4D9-66013A073FD4-GENID-1-8-1-3-1-1-9-1-4-1-8-1.dita	Wed Mar 31 11:11:55 2010 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
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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-ACC71D0D-32C4-5DAF-B4D9-66013A073FD4-GENID-1-8-1-3-1-1-9-1-4-1-8-1" xml:lang="en"><title>Synchronising
-FEP Instantiations</title><shortdesc>This topic describes how to synchronize settings across different
-instances of the same FEP.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
-<p>As mentioned previously, the FEP architecture has been designed so that
-each running application has its own instance of the current FEP. <codeph>CCoeFep</codeph> provides
-support for synchronizing attributes across all of these instances, so that
-when one instance changes the value of an attribute, the others are automatically
-updated. In order for this to happen, the FEP has to do several things. </p>
-<ul>
-<li id="GUID-EC8E4D77-BE0E-5A5E-87B0-817109AD5D44-GENID-1-8-1-3-1-1-9-1-4-1-8-1-3-2-1"><p>Override the four pure
-virtual functions that <xref href="GUID-ADAA039A-7BF3-3B06-8486-2E3604C2633D.dita"><apiname>CCoeFep</apiname></xref> inherits from <xref href="GUID-B0007B23-6745-31BE-A832-9ACA4C12E3E6.dita"><apiname>MFepAttributeStore</apiname></xref>: <codeph>NumberOfAttributes()</codeph>, <codeph>AttributeAtIndex()</codeph>, <codeph>WriteAttributeDataToStreamL()</codeph> and <codeph>ReadAttributeDataFromStreamL()</codeph>. <codeph>NumberOfAttributes()</codeph> should return the number of attributes that are to be synchronized across
-all instances of the FEP, <codeph>AttributeAtIndex()</codeph> should return
-the UID of the specified attribute, and <codeph>WriteAttributeDataToStreamL()</codeph> and <codeph>ReadAttributeDataFromStreamL()</codeph> should
-write/read the specified attribute’s data to/from the provided stream. </p> </li>
-<li id="GUID-0163FF77-8495-5812-AF0D-2FB9AB376EC5-GENID-1-8-1-3-1-1-9-1-4-1-8-1-3-2-2"><p>When the object of the <xref href="GUID-ADAA039A-7BF3-3B06-8486-2E3604C2633D.dita"><apiname>CCoeFep</apiname></xref> -derived
-class has been fully constructed, call <codeph>CCoeFep::ReadAllAttributesL()</codeph>.
-This calls the <codeph>ReadAttributeDataFromStreamL()</codeph> virtual function
-for each of the UIDs that the FEP requires to be synchronized (as specified
-by <codeph>NumberOfAttributes()</codeph> and <codeph>AttributeAtIndex()</codeph>). </p> </li>
-<li id="GUID-E4435F88-8C8F-5E93-8587-101DBCA7FA03-GENID-1-8-1-3-1-1-9-1-4-1-8-1-3-2-3"><p>After internally changing
-the value of an attribute that is to be synchronized, call <codeph>CCoeFep::WriteAttributeDataAndBroadcastL()</codeph> to
-propagate that change to all the other instances of the FEP. The parameter
-identifies the attributes that are to be synchronized, using UIDs. See the
-Symbian website for information on how to be allocated UIDs. </p> </li>
-</ul>
-<p>The purpose of the <codeph>SynchronouslyExecuteSettingsDialogL()</codeph> exported
-function, which the FEP must provide, is to launch a dialog that allows the
-user to change any settings specific to that FEP. As mentioned above, there
-is no guarantee that any instance of that particular FEP exists when this
-function is called. In order for the dialog launched by <codeph>SynchronouslyExecuteSettingsDialogL()</codeph> to
-be able to edit settings that are required to be synchronized across all running
-applications, the dialog class must derive from <xref href="GUID-270424BB-124B-39FF-9CDA-5CAFB5407FAE.dita"><apiname>MFepAttributeStorer</apiname></xref>.
-The dialog class’ implementation of <xref href="GUID-270424BB-124B-39FF-9CDA-5CAFB5407FAE.dita"><apiname>MFepAttributeStorer</apiname></xref> ’s
-virtual functions should be the same as the <xref href="GUID-ADAA039A-7BF3-3B06-8486-2E3604C2633D.dita"><apiname>CCoeFep</apiname></xref> -derived
-class’ implementation of them. For an example of this, see TFEP1Plugin. When
-the dialog is launched it needs to call <codeph>MFepAttributeStorer::ReadAllAttributesL()</codeph> to
-correctly initialize all the settings. Conversely, the settings in the dialog
-are committed by calling <codeph>MFepAttributeStorer::WriteAttributeDataAndBroadcastL()</codeph>. </p>
-</conbody></concept>
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