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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-0F593BE1-1220-4403-B04E-B8E8A9A49701" xml:lang="en"><title>UI concepts</title><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>The UI (User Interface) in devices based on the Symbian platform consists
+of at least one display for showing output to mobile device users and keys
+that allow mobile device users to enter input. The number, size, and resolution
+of displays varies among <xref href="http://www.forum.nokia.com/devices/matrix_s60_1.html" scope="external">devices based on the Symbian platform</xref>, as do the keys available for input.</p>
+<fig id="GUID-84A0AF11-85F9-45E1-B723-47A696C42619"><title>Symbian UI</title><image href="GUID-FE89E799-4F19-4C22-96B7-8006EB55812E_d0e41980_href.png"/></fig>
+<p>The display consists of different elements, for which the following
+terms are used:</p>
+<ul>
+<li><p>window - an area on the display. There are windows that take
+up the entire display, and other windows that only take up part of the display.
+For example, pop-up windows do not cover the entire display. Pop-up windows
+have frames and typically the underlying window is partly visible behind the
+pop-up window. Access to windows is gained through <xref href="GUID-5944FFF1-79C6-4F5E-95C8-F4833AFC64AB.dita"><i>controls</i></xref>.</p>
+</li>
+<li><p>pane - this is a subelement of a window that is dedicated
+to a specific purpose. Windows may contain several panes, and panes may contain
+subpanes. </p></li>
+</ul>
+<section id="GUID-4D941E4F-5954-4132-AAB4-CD4A725862EE"><title>Windows</title>
+<p>The following figure illustrates a typical window for an application:</p>
+<fig id="GUID-0E232F07-32AC-42B7-B94C-D959FF35AB68"><title>Symbian UI window</title><image href="GUID-657CAC8A-5524-4D76-9CAB-056191D3A318_d0e42011_href.png"/></fig>
+<p>Typically, windows contain a status pane, a main pane, and a control
+pane.</p>
+<p>Note that the Symbian UI can rotate between portrait and landscape layouts.
+For more information on the design implications of this feature, see Chapter
+7 of the S60 UI Style Guide available for download from <xref href="http://www.forum.nokia.com/info/sw.nokia.com/id/04c58d5a-84c3-42db-83d5-486c1cf3e6b3/S60_UI_Style_Guide_v1_3_en.pdf.html" scope="external">Forum Nokia</xref>.</p>
+<p>By default, the <i>status</i> pane:</p>
+<ul>
+<li><p>occupies the top part of the display</p></li>
+<li><p>shows information on the current application and state, and
+general information about the device status, such as signal and battery strength</p>
+</li>
+<li><p>contains five subpanes: <i>title pane</i>, <i>context pane</i>, <i>navi
+pane</i>, <i>signal pane</i>, and <i>battery pane/universal indicator pane</i></p>
+</li>
+</ul>
+<p>The <i>main</i> pane is in the middle of the display and is where applications
+show their application state.</p>
+<p>By default, the <i>control</i> pane:</p>
+<ul>
+<li><p>occupies the bottom part of the display</p></li>
+<li><p>displays the labels associated with the two softkeys</p>
+</li>
+<li><p>appears even when pop-up windows are on the display, although
+they are not contained in the pop-up window.</p></li>
+</ul>
+<p>Mobile device users navigate through applications based on input from
+selections in the <i>control pane</i> or key presses. The traditional hierarchical
+tree structure forms the basis for navigation, with mobile device users moving
+from one node, which represents a state, to another. </p>
+<p>The figure below illustrates an example of a basic state hierarchy.</p>
+<fig id="GUID-C8A1E4B5-8737-4378-A44A-21EB14882EF5"><title>Example of a basic state hierarchy in an application</title><image href="GUID-7BE7AC77-4EF5-46BD-A491-1DDBBA20AFE6_d0e42099_href.png"/></fig>
+</section>
+<section id="GUID-1ADE27AA-CFB6-42C2-8AE2-E7EDD4EC627A"><title>Tabs</title>
+<p>The Symbian UI supports tabs, which allow you to collect information
+for a state onto different pages. These tabs exist in the same node of the
+navigation hierarchy. The concept of tabs is related to the term <xref href="GUID-DAC32BB9-C0EB-42FF-A596-C2F1A90A4BD7.dita"><i>view</i></xref>.</p>
+<p>The following figure illustrates the use of tabs in an application.</p>
+<fig id="GUID-19AFDF8B-AC92-4214-BC40-DFEC8F32B6FE"><title>Windows with tabs</title><image href="GUID-BA13D0D6-DE42-43D3-BCA8-5B83181B009E_d0e42119_href.png"/></fig>
+<p>The following figures indicates how tabs appear in the navigation hierarchy.</p>
+<fig id="GUID-F595A77A-00A2-484F-85E5-3318749979E7"><title>Example of a hierarchy with tabs</title><image href="GUID-ADB3FA27-1DC0-4A04-A443-A174EDADF49D_d0e42127_href.png"/></fig>
+<p>See also:</p>
+<ul>
+<li><p><xref href="GUID-A4560E99-C124-49A1-ADA1-D1B1F18EE539.dita">Relationship
+between framework and applications</xref></p>
+</li>
+<li><p><xref href="GUID-B02C762B-C452-4184-ABEA-4753E6CD47D2.dita">Scalability</xref></p>
+</li>
+<li><p><xref href="GUID-A1DBE03F-728E-4F31-BE74-5BDA3906C8DD.dita">Themes</xref></p>
+</li>
+</ul>
+<p>The following concepts are also relevant in this context:</p>
+<ul>
+<li><p><xref href="GUID-FD2CDEB8-0784-4BE5-A775-170F57D71BBC.dita">UI controller</xref></p>
+</li>
+<li><p><xref href="GUID-5944FFF1-79C6-4F5E-95C8-F4833AFC64AB.dita">Controls</xref></p>
+</li>
+<li><p><xref href="GUID-DAC32BB9-C0EB-42FF-A596-C2F1A90A4BD7.dita">Views</xref></p>
+</li>
+</ul>
+</section>
+</conbody></concept>
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