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1 <?xml version="1.0" encoding="utf-8"?> |
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2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. --> |
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3 <!-- This component and the accompanying materials are made available under the terms of the License |
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4 "Eclipse Public License v1.0" which accompanies this distribution, |
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5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". --> |
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6 <!-- Initial Contributors: |
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7 Nokia Corporation - initial contribution. |
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8 Contributors: |
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9 --> <!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"><concept id="GUID-16950F22-F5DE-4D52-8414-544105BA3200" xml:lang="en"><title>Hierarchical |
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10 list</title><prolog><metadata><keywords></keywords></metadata></prolog><conbody> |
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11 <p>The hierarchical list component (a "tree list") is available for use in |
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12 dialogs that deal with moving items to and from (or copying them) from one |
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13 folder to another. The main use situation for the component is the File Manager |
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14 folder and file browsing, when the actual data is being showed in the same |
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15 view. The hierarchical list component allows users to browse through their |
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16 folder content by having a list and its content available simultaneously: |
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17 the user can simply expand a listed item (folder) to show its content.</p> |
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18 <p>Unlike the other Symbian list types, the hierarchical list |
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19 component is not structured on the A D column structure. Visually, the hierarchical |
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20 levels are connected with vertical lines (see the figure below), and the folders |
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21 in each hierarchy level are shown before files on that same level. Scroll |
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22 bars function as usual (vertical bar is always present, horizontal bar is |
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23 available when necessary), and the list does not loop by default, although |
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24 it is possible to enable looping. Marquee scrolling is supported, but if not |
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25 used, the names of folders and files are truncated where necessary. The height |
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26 and the vertical distribution of the folder/file texts on the list is the |
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27 same as in normal lists. Hierarchical lists can be used both in the main pane |
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28 and as pop-ups.</p> |
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29 <fig id="GUID-5CC170B7-72AA-422E-8C44-AFB135C596D6"> |
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30 <title>Hierarchical list component</title> |
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31 <image href="GUID-341CE215-056C-45B6-ABE2-C75442605147_d0e55750_href.png" scale="40" placement="inline"></image> |
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32 </fig> |
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33 <p>Owing to the need for horizontal scrolling, it is not possible to use tabs |
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34 in the Navi pane. Typically the hierarchical list component is capable of |
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35 showing three hierarchy levels in portrait orientation, but this may vary |
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36 according to the display sizes and resolutions as well as the display orientation. |
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37 The order of folders (sorting order) on each level is defined by the application.</p> |
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38 <p><b>General navigation:</b></p> |
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39 <ul> |
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40 <li><p>Arrow keys either expand collapsed folders (Arrow right, the focus |
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41 does not move yet), collapse expanded folders (Arrow left: one press to move |
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42 the focus onto the parent folder when there is one, second press to collapse |
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43 the contents), or move the focus into the direction of scrolling. </p></li> |
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44 <li><p>The Selection key expands collapsed (or vice versa) folders or opens |
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45 files under focus. </p></li> |
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46 <li><p>Commands for expanding, collapsing and opening folders or files are |
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47 also available in the <b>Options</b> menu.</p></li> |
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48 </ul> |
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49 <section id="GUID-E507585F-2B77-49BC-B982-76E143E7BF2A"><title>Using |
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50 hierarchical lists in C++ applications</title><p>The API to use for hierarchical |
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51 lists is the Hierarchical |
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52 lists API. For implementation information, see Using |
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53 the Hierarchical lists API.</p></section> |
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54 </conbody></concept> |