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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtslib_p.h"
#include <QSocketNotifier>
#include <QStringList>
#include <QPoint>
#include <QLoggingCategory>
#include <qpa/qwindowsysteminterface.h>
#include <errno.h>
#include <tslib.h>
QT_BEGIN_NAMESPACE
Q_LOGGING_CATEGORY(qLcTsLib, "qt.qpa.input")
QTsLibMouseHandler::QTsLibMouseHandler(const QString &key,
const QString &specification,
QObject *parent)
: QObject(parent),
m_notify(0), m_x(0), m_y(0), m_pressed(0), m_rawMode(false)
{
qCDebug(qLcTsLib) << "Initializing tslib plugin" << key << specification;
setObjectName(QLatin1String("TSLib Mouse Handler"));
QByteArray device = qgetenv("TSLIB_TSDEVICE");
if (specification.startsWith(QLatin1String("/dev/")))
device = specification.toLocal8Bit();
if (device.isEmpty())
device = QByteArrayLiteral("/dev/input/event1");
m_dev = ts_open(device.constData(), 1);
if (!m_dev) {
qErrnoWarning(errno, "ts_open() failed");
return;
}
if (ts_config(m_dev))
qErrnoWarning(errno, "ts_config() failed");
m_rawMode = !key.compare(QLatin1String("TslibRaw"), Qt::CaseInsensitive);
int fd = ts_fd(m_dev);
if (fd >= 0) {
qCDebug(qLcTsLib) << "tslib device is" << device;
m_notify = new QSocketNotifier(fd, QSocketNotifier::Read, this);
connect(m_notify, SIGNAL(activated(int)), this, SLOT(readMouseData()));
} else {
qErrnoWarning(errno, "tslib: Cannot open input device %s", device.constData());
}
}
QTsLibMouseHandler::~QTsLibMouseHandler()
{
if (m_dev)
ts_close(m_dev);
}
static bool get_sample(struct tsdev *dev, struct ts_sample *sample, bool rawMode)
{
if (rawMode)
return (ts_read_raw(dev, sample, 1) == 1);
else
return (ts_read(dev, sample, 1) == 1);
}
void QTsLibMouseHandler::readMouseData()
{
ts_sample sample;
while (get_sample(m_dev, &sample, m_rawMode)) {
bool pressed = sample.pressure;
int x = sample.x;
int y = sample.y;
// work around missing coordinates on mouse release
if (sample.pressure == 0 && sample.x == 0 && sample.y == 0) {
x = m_x;
y = m_y;
}
if (!m_rawMode) {
//filtering: ignore movements of 2 pixels or less
int dx = x - m_x;
int dy = y - m_y;
if (dx*dx <= 4 && dy*dy <= 4 && pressed == m_pressed)
continue;
}
QPoint pos(x, y);
QWindowSystemInterface::handleMouseEvent(0, pos, pos, pressed ? Qt::LeftButton : Qt::NoButton);
m_x = x;
m_y = y;
m_pressed = pressed;
}
}
QT_END_NAMESPACE
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