1 <?xml version="1.0" encoding="utf-8"?> |
|
2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. --> |
|
3 <!-- This component and the accompanying materials are made available under the terms of the License |
|
4 "Eclipse Public License v1.0" which accompanies this distribution, |
|
5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". --> |
|
6 <!-- Initial Contributors: |
|
7 Nokia Corporation - initial contribution. |
|
8 Contributors: |
|
9 --> |
|
10 <!DOCTYPE concept |
|
11 PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
|
12 <concept id="GUID-644810EC-7D5E-4569-834B-C207447B88A3" xml:lang="en"><title>Multitasking</title><prolog><metadata><keywords/></metadata></prolog><conbody> |
|
13 <p>The Symbian UI style allows multitasking; that is, working with more than |
|
14 one application simultaneously. Mobile device users can leave an application |
|
15 running when they start another application, swap between running applications, |
|
16 and interact with them.</p> |
|
17 <p>To open a new application without closing the one that is presently being |
|
18 used, users can press the Home / Menu key to go to the <xref href="GUID-86AADA3E-B77C-45CC-B523-785B75BAA5AA.dita">Menu</xref> and |
|
19 select application suites and applications.</p> |
|
20 <p>The first application process remains running in the background while the |
|
21 user interacts with the second application.</p> |
|
22 <p>The number of simultaneously running (different) applications is limited |
|
23 only by the available memory in the device. When a new application process |
|
24 cannot be created because of limited memory, the system can automatically |
|
25 shut down applications to increase the amount of free memory.</p> |
|
26 <p>To swap active applications, users can:</p> |
|
27 <ul> |
|
28 <li><p>Long-press the Home / Menu key to open the task swapping window.</p></li> |
|
29 <li><p>Alternatively, select <uicontrol>Options</uicontrol> > <uicontrol>Show |
|
30 open applications</uicontrol> to open the task swapping window.</p></li> |
|
31 </ul> |
|
32 <fig id="GUID-9855DE8A-5103-4172-9884-C5266ADB8F16"> |
|
33 <title>Visualized multitasking: task swapping window</title> |
|
34 <image href="GUID-182326EB-E818-4146-82D9-494D59E430B8_d0e81983_href.png" placement="inline"/> |
|
35 </fig> |
|
36 <p>The task swapping window displays the applications that are currently running |
|
37 in the order of their most recent use. By default, the focus is on the first |
|
38 item in the grid. The task swapping window is a pop-up with a heading (<uicontrol>Open |
|
39 applications</uicontrol>). The names of the open applications are displayed |
|
40 in an Information pop-up. The Information pop-up is launched with a 0.5 second |
|
41 delay after the focus is moved onto each item, and it remains visible for |
|
42 1.5 seconds (or until the focus is moved to another item). Menu and home screen |
|
43 are always visible in the task swapping window. The configuration and visual |
|
44 appearance of the task swapping window might depend on the product.</p> |
|
45 <p>Users can use the task swapping window to close active applications. In |
|
46 devices with a keypad, users move the focus onto the application to be closed, |
|
47 and press the <uicontrol>Clear</uicontrol> (delete) key. In touch devices, |
|
48 users tap and hold the item to open a pop-up menu where they can select the <uicontrol>Exit</uicontrol> option.</p> |
|
49 <p>For implementation information on |
|
50 using the <xref href="GUID-29486886-CB54-4A83-AD6D-70F971A86DFC.dita">application |
|
51 and UI frameworks</xref>, see <xref href="GUID-EF7FF39E-929F-4767-B475-5D582D37BB32.dita">Window |
|
52 server events</xref>.</p> |
|
53 </conbody><related-links> |
|
54 <linklist> |
|
55 <link href="GUID-0F8D0399-58CD-4EB6-82DF-75D6BE5B0A84.dita"><linktext>Application |
|
56 framework concepts</linktext></link> |
|
57 <link href="GUID-BDDDF68F-F7C3-43AF-8B6C-C77C701FD2A9.dita"><linktext>Framework |
|
58 requirements for GUI applications</linktext></link> |
|
59 </linklist> |
|
60 </related-links></concept> |
|