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<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">legacy

S60 devices and devices based on the Symbian platform</xref>, as do the

keys available for input.</p>

<p>The display consists of the following elements:</p>

<ul>

<li><p><b>Window</b> - 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><b>Pane</b> - This is a sub-element of a window that is dedicated

to a specific purpose. Windows may contain several panes, and panes may contain

sub-panes. </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>

<p>Typically, a window contains a status pane, a main pane, and a control

pane.</p>

<note>

<p>Symbian UI can rotate between portrait and landscape layouts. For more

information on the design implications of this feature, see <xref href="GUID-685C3F33-1530-4984-B125-E4EF8EBB2EE8.dita">Symbian

UI with rotation</xref>.</p>

</note>

<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 <i>title pane</i>, <i>context pane</i>, <i>navi

pane</i>, <i>signal pane</i>, <i>battery pane</i>, <i>universal indicator

pane</i> and <i>clock pane</i> sub-panes.</p></li>

</ul>

<p>The <i>main</i> pane is in the middle of the display. Applications display

their application state in the main pane.</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>

</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>

</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>

<p>The following figures illustrates how tabs appear in the navigation

hierarchy.</p>

<p>See also:</p>

</section>

</conbody></concept>