Symbian3/SDK/Source/GUID-7AE34C8A-50C6-49BA-9E43-AE76873B5E12.dita
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Thu, 21 Jan 2010 18:18:20 +0000
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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-7AE34C8A-50C6-49BA-9E43-AE76873B5E12" xml:lang="en"><title>Handling
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toolbar item events</title><prolog><metadata><keywords/></metadata></prolog><conbody>
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<section>      <p>To be able to receive toolbar item events in your application
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or application view, you must implement the toolbar observer interface in
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the view and register the view to the toolbar:</p> <p>To receive toolbar item
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events, use the observer class <xref href="jar:GUID-759FBC7F-5384-4487-8457-A8D4B76F6AA6.jar!/html/classMAknToolbarObserver.html" format="application/java-archive"><codeph>MAknToolbarObserver</codeph></xref>.</p>      <p>The example below shows how to set the toolbar observer.</p> 
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    <codeblock xml:space="preserve">void CMyAppView::ConstructL( TInt aResId )
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    {
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    BaseConstructL( aResId );
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    CAknToolbar* toolbar = Toolbar();
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    if ( toolbar )
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        {
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        toolbar-&gt;SetToolbarObserver( this );
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        }
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    }
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</codeblock>     </section>
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<section>       <p>Handle toolbar item events in <codeph>MAknToolbarObserver</codeph>’s <xref href="jar:GUID-759FBC7F-5384-4487-8457-A8D4B76F6AA6.jar!/html/classMAknToolbarObserver.html#af95495179253d4ce78609feb8c64d14" format="application/java-archive"><codeph>OfferToolbarEventL()</codeph></xref>.</p><p><codeph>OfferToolbarEventL()</codeph> is called when the toolbar
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item state has changed, for example when a button is pressed. When handling
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a toolbar event, the control in question can be identified from the commandid
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that is sent as a parameter in the method. The ID belongs to that control
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it was sent from (in case of a button, the ID of the button that was pressed).</p> 
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           <p>The example below illustrates how to implement <codeph>OfferToolBarEventL()</codeph>.</p> 
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     <codeblock xml:space="preserve">void CMyAppView::OfferToolbarEventL( TInt aCommandId )
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    {
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    if ( aCommandId == KButtonId )
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        {
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        // do button function
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        }
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    }
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</codeblock></section>
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</conbody></concept>