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-->  <!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"><concept id="GUID-DAF35D49-9630-4186-A350-E8483693D50D" xml:lang="en"><title>Hierarchical

column list</title><prolog><metadata><keywords></keywords></metadata></prolog><conbody>

<p>Hierarchical column list is used for browsing in one view files and folders

that are in different levels in the file system. This enables for example

showing subtitles among the list items, and collapsing and expanding data

items under it.</p>

<fig id="GUID-0A22D779-41C5-41DD-884C-AFC7DF192720">

<title>Hierarchical column list component, where the subtitle "Yesterday"

is expanded</title>

<image href="GUID-573420CD-E8E0-4E98-B3E2-1388F4B1137D_d0e55804_href.png" scale="40" placement="inline"></image>

</fig>

<p>The hierarchical column list can have three different row types:</p>

<ul>

<li><p>Subtitle row </p></li>

<li><p>Core data row </p></li>

<li><p>Simple data row</p></li>

</ul>

<p>Subtitle can have only one type of subitems, thus both core data and simple

data items cannot exist under same subtitle. It is recommended, that only

one type of subitems would be used in the same view.</p>

<p>To enable more information in a single row, the core data row can be divided

into two core data columns. The more important information should be shown

in the first column due to more space, for example e-mail sender information

in the first column, and subject in the second column. In landscape there

can be also third column in use.</p>

<p><b>General navigation:</b> </p>

<p>Expanding and collapsing can be done in subtitle rows:</p>

<ul>

<li><p>Arrow key: Tabs can be used together with a hierarchical column list,

and thus arrow keys are used for moving between tabs. If there are no tabs,

the arrow keys expand subtitle item (Arrow right, the focus is not moved)

and collapse expanded subtitle item (Arrow left, focus is not moved). </p></li>

<li><p>The Selection key expands collapsed (or vice versa) subtitle item in

focus. </p></li>

<li><p>Commands for expanding, collapsing and opening folders or files are

also available in the <b>Options</b> menu.</p></li>

</ul>

<section><title>Using hierarchical column

lists in C++ applications</title><p>The API to use for hierarchical column

lists is the Hierarchical

lists API. For implementation information, see Using

the Hierarchical lists API.</p></section>

</conbody></concept>