author | Dominic Pinkman <Dominic.Pinkman@Nokia.com> |
Thu, 21 Jan 2010 18:18:20 +0000 | |
changeset 0 | 89d6a7a84779 |
permissions | -rw-r--r-- |
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<?xml version="1.0" encoding="utf-8"?> |
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. --> |
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<!-- This component and the accompanying materials are made available under the terms of the License |
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"Eclipse Public License v1.0" which accompanies this distribution, |
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". --> |
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<!-- Initial Contributors: |
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Nokia Corporation - initial contribution. |
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Contributors: |
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--> |
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<!DOCTYPE concept |
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PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
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<concept id="GUID-BBBA5C6C-4E8B-513A-8FA1-C7A04C54C140" xml:lang="en"><title>Clipboard</title><prolog><metadata><keywords/></metadata></prolog><conbody> |
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Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
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<p>Symbian platform supports the concept of cut, copy and paste by providing |
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a clipboard. An application can copy data to the clipboard and the same data |
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can then be pasted in by the same application or by any other application. </p> |
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<p>The clipboard is a resource which is shared by all applications. An application |
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must, therefore, hold the clipboard for the minimum time possible. </p> |
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<section><title>Cut, copy and paste</title> <p>The clipboard is encapsulated |
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by the <codeph>CClipboard</codeph> class. Applications use this class when |
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they place data on, or retrieve data from the clipboard. </p> <p>It is implemented |
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as a direct file store. When the data is placed on the clipboard, it is stored |
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in the clipboard's store as a stream or a network of streams. Every data type |
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placed on the clipboard is identified by a UID. This allows a pasting application |
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to identify the required data. </p> <p>It uses a stream dictionary to maintain |
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UID and stream ID pairs, and always makes the stream dictionary the root stream |
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of the store. </p> <p>The essential features of the <codeph>CClipboard</codeph> class |
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are shown in the following diagram: </p> <fig id="GUID-22419444-933C-5431-9717-CD332A17FCF2"> |
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<title> Clipboard class structure </title> |
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<image href="GUID-15591211-58D3-56B6-868F-D34C30ED7A7A_d0e153880_href.png" placement="inline"/> |
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</fig> <p>Any type of data can be placed on the clipboard. When retrieving |
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data, applications check the UID in the stream dictionary to determine whether |
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there is any data relevant to them. The following diagram illustrates a typical |
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situation: </p> <fig id="GUID-3ABDDCDD-DBC9-5BD5-8448-8249F535FB06"> |
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<title> Clipboard store </title> |
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<image href="GUID-F5B58B20-B85C-5BCD-B1EB-69CCE42DE6BB_d0e153891_href.png" placement="inline"/> |
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</fig> </section> |
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</conbody><related-links> |
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<link href="GUID-8C94EE15-82EA-4A95-9044-C3404F95BD51.dita"><linktext>Using |
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Clipboard</linktext></link> |
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<link href="GUID-B683496C-652E-5F48-924E-52D2FF3A78A7.dita"><linktext>Direct file |
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stores</linktext></link> |
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<link href="GUID-79F39C97-75E8-5DB1-B976-8FE76E6E60C9.dita"><linktext>Dictionary |
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stores</linktext></link> |
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<link href="GUID-AB705D21-87A3-5F32-A4B9-17B7593DD5C3.dita"><linktext>UID manipulation</linktext> |
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</link> |
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</related-links></concept> |