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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 --> |
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10 <!DOCTYPE concept |
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11 PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
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12 <concept id="GUID-CABA0B4D-11E4-5659-B949-C4277FB63804" xml:lang="en"><title>Notifier</title><shortdesc>A notifier is a simple service that allows either a single line |
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13 message (an infoprint) or a simple dialog box to be displayed on the hardware's |
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14 display device. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody> |
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15 <p>It is used for sending (debug) trace messages to the screen and putting |
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16 up debug dialog boxes. It can be used in any environment, including the text |
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17 shell used for development of engine or low level type code. Because it doesn't |
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18 require Uikon it is invaluable for developers who need to work without GUI |
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19 dependencies. </p> |
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20 <p>The dialog box consists of two lines of text and two buttons. The buttons |
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21 each display a single text character and the user is expected to key in one |
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22 of these characters. </p> |
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23 <p>The notifier is a server, managed by the Kernel. The client side creates |
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24 a session through an <codeph>RNotifier</codeph> handle. </p> |
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25 <p> <note/> If a plug-in notifier DLL fails to load successfully, the |
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26 OS will not start. Notifiers are critical system resources which must not |
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27 fail to load correctly. </p> |
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28 </conbody></concept> |