diff -r 43e37759235e -r 51a74ef9ed63 Symbian3/SDK/Source/GUID-993A732B-13F8-48B6-B0C5-7246FA6828DF.dita
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-993A732B-13F8-48B6-B0C5-7246FA6828DF.dita	Wed Mar 31 11:11:55 2010 +0100
@@ -0,0 +1,37 @@
+<?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-993A732B-13F8-48B6-B0C5-7246FA6828DF" xml:lang="en"><title>Class
+structure for the toolbar API</title><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>The Toolbar API consists of following classes: <xref href="jar:GUID-759FBC7F-5384-4487-8457-A8D4B76F6AA6.jar!/html/classCAknToolbar.html" format="application/java-archive"><codeph>CAknToolbar</codeph></xref>, <xref href="jar:GUID-759FBC7F-5384-4487-8457-A8D4B76F6AA6.jar!/html/classCAknToolbarExtension.html" format="application/java-archive"><codeph>CAknToolbarExtension</codeph></xref>,
+and <xref href="jar:GUID-759FBC7F-5384-4487-8457-A8D4B76F6AA6.jar!/html/classMAknToolbarObserver.html" format="application/java-archive"><codeph>MAknToolbarObserver</codeph></xref>.
+The Toolbar API class structure and its simplified environment is described
+in the figure below.</p>
+<fig id="GUID-3E08B03E-BE4C-481A-82BB-B7EB03BC806A">
+<title>Toolbar API class structure</title>
+<image href="GUID-E60F9268-35D5-4D3F-B219-22AECF13953B_d0e79541_href.png" placement="inline"/>
+</fig>
+<p><codeph>CAknToolbar</codeph> is the API main class that provides the most
+of the API functionality. The UI framework classes <codeph>CEikAppUiFactory</codeph>, <codeph>CAknView</codeph>,
+and <codeph>CAknAppUi</codeph> take care of creating and destructing the <codeph>CAknToolbar</codeph> object.
+Moreover, you can access the toolbar in your application through these UI
+framework classes.  </p>
+<p><codeph>CAknToolbar</codeph> is a compound (window-owning) control that
+contains simple (non-window-owning) controls that are the toolbar items. Toolbar
+items can be for example <codeph>CAknButton</codeph> type controls. Each toolbar
+can also have one extension that expands the toolbar. The extension contains
+also for example <codeph>CAknButton</codeph> type controls.  </p>
+<p><codeph>MAknToolbarObserver</codeph> is an interface that can be used to
+observe toolbar events. The application class can implement this interface
+and register itself as the toolbar observer. <codeph>CAknToolbar</codeph> then
+informs the observer when toolbar events occur (when toolbar is about to be
+shown and when some toolbar item state has changed e.g. a button is pressed).</p>
+</conbody></concept>
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