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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module 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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qplatformdefs.h"
#include "qmouseqnx_qws.h"
#include "qsocketnotifier.h"
#include "qdebug.h"
#include <sys/dcmd_input.h>
#include <errno.h>
QT_BEGIN_NAMESPACE
/*!
\class QQnxMouseHandler
\preliminary
\ingroup qws
\internal
\since 4.6
\brief The QQnxMouseHandler class implements a mouse driver
for the QNX \c{devi-hid} input manager.
To be able to compile this mouse handler, \l{Qt for Embedded Linux}
must be configured with the \c -qt-mouse-qnx option, see the
\l{Qt for Embedded Linux Pointer Handling}{Pointer Handling} documentation for details.
In order to use this mouse handler, the \c{devi-hid} input manager
must be set up and run with the resource manager interface (option \c{-r}).
Also, Photon must not be running.
Example invocation from command line: \c{/usr/photon/bin/devi-hid -Pr kbd mouse}
Note that after running \c{devi-hid}, you will not be able to use the local
shell anymore. It is suggested to run the command in a shell scrip, that launches
a Qt application after invocation of \c{devi-hid}.
To make \l{Qt for Embedded Linux} explicitly choose the qnx mouse
handler, set the QWS_MOUSE_PROTO environment variable to \c{qnx}. By default,
the first mouse device (\c{/dev/devi/mouse0}) is used. To override, pass a device
name as the first and only parameter, for example
\c{QWS_MOUSE_PROTO=qnx:/dev/devi/mouse1; export QWS_MOUSE_PROTO}.
\sa {Qt for Embedded Linux Pointer Handling}{Pointer Handling}, {Qt for Embedded Linux}
*/
/*!
Constructs a mouse handler for the specified \a device, defaulting to \c{/dev/devi/mouse0}.
The \a driver parameter must be \c{"qnx"}.
Note that you should never instanciate this class, instead let QMouseDriverFactory
handle the mouse handlers.
\sa QMouseDriverFactory
*/
QQnxMouseHandler::QQnxMouseHandler(const QString & /*driver*/, const QString &device)
{
// open the mouse device with O_NONBLOCK so reading won't block when there's no data
mouseFD = QT_OPEN(device.isEmpty() ? "/dev/devi/mouse0" : device.toLatin1().constData(),
QT_OPEN_RDONLY | O_NONBLOCK);
if (mouseFD == -1) {
qErrnoWarning(errno, "QQnxMouseHandler: Unable to open mouse device");
return;
}
// register a socket notifier on the file descriptor so we'll wake up whenever
// there's a mouse move waiting for us.
mouseNotifier = new QSocketNotifier(mouseFD, QSocketNotifier::Read, this);
connect(mouseNotifier, SIGNAL(activated(int)), SLOT(socketActivated()));
qDebug() << "QQnxMouseHandler: connected.";
}
/*!
Destroys this mouse handler and closes the connection to the mouse device.
*/
QQnxMouseHandler::~QQnxMouseHandler()
{
QT_CLOSE(mouseFD);
}
/*! \reimp */
void QQnxMouseHandler::resume()
{
if (mouseNotifier)
mouseNotifier->setEnabled(true);
}
/*! \reimp */
void QQnxMouseHandler::suspend()
{
if (mouseNotifier)
mouseNotifier->setEnabled(false);
}
/*! \internal
This function is called whenever there is activity on the mouse device.
By default, it reads up to 10 mouse move packets and calls mouseChanged()
for each of them.
*/
void QQnxMouseHandler::socketActivated()
{
// _mouse_packet is a QNX structure. devi-hid is nice enough to translate
// the raw byte data from mouse devices into generic format for us.
_mouse_packet packet;
int iteration = 0;
// read mouse events in batches of 10. Since we're getting quite a lot
// of mouse events, it's better to do them in batches than to return to the
// event loop every time.
do {
int bytesRead = QT_READ(mouseFD, &packet, sizeof(packet));
if (bytesRead == -1) {
// EAGAIN means that there are no more mouse events to read
if (errno != EAGAIN)
qErrnoWarning(errno, "QQnxMouseHandler: Unable to read from socket");
return;
}
// bytes read should always be equal to the size of a packet.
Q_ASSERT(bytesRead == sizeof(packet));
// translate the coordinates from the QNX data structure to Qt coordinates
// note the swapped y axis
QPoint pos = mousePos;
pos += QPoint(packet.dx, -packet.dy);
// QNX only tells us relative mouse movements, not absolute ones, so limit the
// cursor position manually to the screen
limitToScreen(pos);
// translate the QNX mouse button bitmask to Qt buttons
int buttons = Qt::NoButton;
if (packet.hdr.buttons & _POINTER_BUTTON_LEFT)
buttons |= Qt::LeftButton;
if (packet.hdr.buttons & _POINTER_BUTTON_MIDDLE)
buttons |= Qt::MidButton;
if (packet.hdr.buttons & _POINTER_BUTTON_RIGHT)
buttons |= Qt::RightButton;
// call mouseChanged() - this does all the magic to actually move the on-screen
// mouse cursor.
mouseChanged(pos, buttons, 0);
} while (++iteration < 11);
}
QT_END_NAMESPACE
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