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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the plugins 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 "qmouselinuxinput_qws.h"
#include <QScreen>
#include <QSocketNotifier>
#include <qplatformdefs.h>
#include <private/qcore_unix_p.h> // overrides QT_OPEN
#include <errno.h>
#include <linux/input.h>
QT_BEGIN_NAMESPACE
class QWSLinuxInputMousePrivate : public QObject
{
Q_OBJECT
public:
QWSLinuxInputMousePrivate(QWSLinuxInputMouseHandler *, const QString &);
~QWSLinuxInputMousePrivate();
void enable(bool on);
private Q_SLOTS:
void readMouseData();
private:
QWSLinuxInputMouseHandler *m_handler;
QSocketNotifier * m_notify;
int m_fd;
int m_x, m_y;
int m_buttons;
};
QWSLinuxInputMouseHandler::QWSLinuxInputMouseHandler(const QString &device)
: QWSCalibratedMouseHandler(device)
{
d = new QWSLinuxInputMousePrivate(this, device);
}
QWSLinuxInputMouseHandler::~QWSLinuxInputMouseHandler()
{
delete d;
}
void QWSLinuxInputMouseHandler::suspend()
{
d->enable(false);
}
void QWSLinuxInputMouseHandler::resume()
{
d->enable(true);
}
QWSLinuxInputMousePrivate::QWSLinuxInputMousePrivate(QWSLinuxInputMouseHandler *h, const QString &device)
: m_handler(h), m_notify(0), m_x(0), m_y(0), m_buttons(0)
{
setObjectName(QLatin1String("LinuxInputSubsystem Mouse Handler"));
QString dev = QLatin1String("/dev/input/event0");
if (device.startsWith(QLatin1String("/dev/")))
dev = device;
m_fd = QT_OPEN(dev.toLocal8Bit().constData(), O_RDONLY | O_NDELAY, 0);
if (m_fd >= 0) {
m_notify = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);
connect(m_notify, SIGNAL(activated(int)), this, SLOT(readMouseData()));
} else {
qWarning("Cannot open mouse input device '%s': %s", qPrintable(dev), strerror(errno));
return;
}
}
QWSLinuxInputMousePrivate::~QWSLinuxInputMousePrivate()
{
if (m_fd >= 0)
QT_CLOSE(m_fd);
}
void QWSLinuxInputMousePrivate::enable(bool on)
{
if (m_notify)
m_notify->setEnabled(on);
}
void QWSLinuxInputMousePrivate::readMouseData()
{
if (!qt_screen)
return;
struct ::input_event buffer[32];
int n = 0;
forever {
n = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);
if (n == 0) {
qWarning("Got EOF from the input device.");
return;
} else if (n < 0 && (errno != EINTR && errno != EAGAIN)) {
qWarning("Could not read from input device: %s", strerror(errno));
return;
} else if (n % sizeof(buffer[0]) == 0) {
break;
}
}
n /= sizeof(buffer[0]);
for (int i = 0; i < n; ++i) {
struct ::input_event *data = &buffer[i];
bool unknown = false;
if (data->type == EV_ABS) {
if (data->code == ABS_X) {
m_x = data->value;
} else if (data->code == ABS_Y) {
m_y = data->value;
} else {
unknown = true;
}
} else if (data->type == EV_REL) {
if (data->code == REL_X) {
m_x += data->value;
} else if (data->code == REL_Y) {
m_y += data->value;
} else {
unknown = true;
}
} else if (data->type == EV_KEY && data->code == BTN_TOUCH) {
m_buttons = data->value ? Qt::LeftButton : 0;
} else if (data->type == EV_KEY) {
int button = 0;
switch (data->code) {
case BTN_LEFT: button = Qt::LeftButton; break;
case BTN_MIDDLE: button = Qt::MidButton; break;
case BTN_RIGHT: button = Qt::RightButton; break;
}
if (data->value)
m_buttons |= button;
else
m_buttons &= ~button;
} else if (data->type == EV_SYN && data->code == SYN_REPORT) {
QPoint pos(m_x, m_y);
pos = m_handler->transform(pos);
m_handler->limitToScreen(pos);
m_handler->mouseChanged(pos, m_buttons);
} else if (data->type == EV_MSC && data->code == MSC_SCAN) {
// kernel encountered an unmapped key - just ignore it
continue;
} else {
unknown = true;
}
if (unknown) {
qWarning("unknown mouse event type=%x, code=%x, value=%x", data->type, data->code, data->value);
}
}
}
QT_END_NAMESPACE
#include "qmouselinuxinput_qws.moc"
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