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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+ \page qt-embedded-charinput.html
+
+ \title Qt for Embedded Linux Character Input
+ \ingroup qt-embedded-linux
+
+ When running a \l {Qt for Embedded Linux} application, it either runs as a
+ server or connects to an existing server. The keyboard driver is
+ loaded by the server application when it starts running, using
+ Qt's \l {How to Create Qt Plugins}{plugin system}.
+
+ Internally in the client/server protocol, all system generated
+ events, including key events, are passed to the server application
+ which then propagates the event to the appropriate client. Note
+ that key events do not always come from a keyboard device, they
+ can can also be generated by the server process using input
+ widgets.
+
+ \table
+ \header \o Input Widgets
+ \row
+ \o
+
+ The server process may call the static QWSServer::sendKeyEvent()
+ function at any time. Typically, this is done by popping up a
+ widget that enables the user specify characters with the pointer
+ device.
+
+ Note that the key input widget should not take focus since the
+ server would then just send the key events back to the input
+ widget. One way to make sure that the input widget never takes
+ focus is to set the Qt::Tool widget flag in the QWidget
+ constructor.
+
+ The \l{Qt Extended} environment contains various input widgets such as
+ Handwriting Recognition and Virtual Keyboard.
+
+ \endtable
+
+ \tableofcontents
+
+ \section1 Available Keyboard Drivers
+
+ \l {Qt for Embedded Linux} provides ready-made drivers for the SL5000, Yopy,
+ Vr41XX, console (TTY) and USB protocols. Run the \c configure
+ script to list the available drivers:
+
+ \snippet doc/src/snippets/code/doc_src_emb-charinput.qdoc 0
+
+ Note that the console keyboard driver also handles console
+ switching (\bold{Ctrl+Alt+F1}, ..., \bold{Ctrl+Alt+F10}) and
+ termination (\bold{Ctrl+Alt+Backspace}).
+
+ In the default Qt configuration, only the "TTY" driver is
+ enabled. The various drivers can be enabled and disabled using the
+ \c configure script. For example:
+
+ \snippet doc/src/snippets/code/doc_src_emb-charinput.qdoc 1
+
+ Custom keyboard drivers can be implemented by subclassing the
+ QWSKeyboardHandler class and creating a keyboard driver plugin
+ (derived from the QKbdDriverPlugin class). The default
+ implementation of the QKbdDriverFactory class will automatically
+ detect the plugin, loading the driver into the server application
+ at run-time.
+
+ \section1 Specifying a Keyboard Driver
+
+ To specify which driver to use, set the QWS_KEYBOARD environment
+ variable. For example (if the current shell is bash, ksh, zsh or
+ sh):
+
+ \snippet doc/src/snippets/code/doc_src_emb-charinput.qdoc 2
+
+ The \c <driver> argument are \c SL5000, \c Yopy, \c VR41xx, \c
+ TTY, \c USB and \l {QKbdDriverPlugin::keys()}{keys} identifying
+ custom drivers, and the driver specific options are typically a
+ device, e.g., \c /dev/tty0.
+
+ Multiple keyboard drivers can be specified in one go:
+
+ \snippet doc/src/snippets/code/doc_src_emb-charinput.qdoc 3
+
+ Input will be read from all specified drivers.
+*/