[556] | 1 | /****************************************************************************
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| 2 | **
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[651] | 3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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[556] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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| 6 | **
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| 7 | ** This file is part of the documentation of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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| 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at [email protected].
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | /*!
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| 43 | \page qt-embedded-charinput.html
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| 44 |
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| 45 | \title Qt for Embedded Linux Character Input
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| 46 | \ingroup qt-embedded-linux
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| 47 |
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| 48 | When running a \l {Qt for Embedded Linux} application, it either runs as a
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| 49 | server or connects to an existing server. The keyboard driver is
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| 50 | loaded by the server application when it starts running, using
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| 51 | Qt's \l {How to Create Qt Plugins}{plugin system}.
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| 52 |
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| 53 | Internally in the client/server protocol, all system generated
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| 54 | events, including key events, are passed to the server application
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| 55 | which then propagates the event to the appropriate client. Note
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| 56 | that key events do not always come from a keyboard device, they
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| 57 | can can also be generated by the server process using input
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| 58 | widgets.
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| 59 |
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| 60 | \table
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| 61 | \header \o Input Widgets
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| 62 | \row
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| 63 | \o
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| 64 |
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| 65 | The server process may call the static QWSServer::sendKeyEvent()
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| 66 | function at any time. Typically, this is done by popping up a
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| 67 | widget that enables the user specify characters with the pointer
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| 68 | device.
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| 69 |
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| 70 | Note that the key input widget should not take focus since the
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| 71 | server would then just send the key events back to the input
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| 72 | widget. One way to make sure that the input widget never takes
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| 73 | focus is to set the Qt::Tool widget flag in the QWidget
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| 74 | constructor.
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| 75 |
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| 76 | The \l{Qt Extended} environment contains various input widgets such as
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| 77 | Handwriting Recognition and Virtual Keyboard.
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| 78 |
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| 79 | \endtable
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| 80 |
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| 81 | \tableofcontents
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| 82 |
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