--- /dev/null
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qevdevtablet_p.h"
+#include <QWindowSystemInterface>
+#include <QStringList>
+#include <QSocketNotifier>
+#include <QGuiApplication>
+#include <QDebug>
+#include <QtCore/private/qcore_unix_p.h>
+#include <QtPlatformSupport/private/qdevicediscovery_p.h>
+#include <linux/input.h>
+
+QT_BEGIN_NAMESPACE
+
+class QEvdevTabletData
+{
+public:
+ QEvdevTabletData(QEvdevTabletHandler *q_ptr);
+ bool queryLimits();
+ void processInputEvent(input_event *ev);
+ void reportProximityEnter();
+ void reportProximityLeave();
+ void report();
+
+ QEvdevTabletHandler *q;
+ QSocketNotifier *notifier;
+ int fd;
+ int lastEventType;
+ QString devName;
+ struct {
+ int x, y, p, d;
+ } minValues, maxValues;
+ struct {
+ int x, y, p, d;
+ bool down, lastReportDown;
+ int tool, lastReportTool;
+ QPointF lastReportPos;
+ } state;
+};
+
+QEvdevTabletData::QEvdevTabletData(QEvdevTabletHandler *q_ptr)
+ : q(q_ptr), notifier(0), fd(-1), lastEventType(0)
+{
+ memset(&minValues, 0, sizeof(minValues));
+ memset(&maxValues, 0, sizeof(maxValues));
+ memset(&state, 0, sizeof(state));
+}
+
+bool QEvdevTabletData::queryLimits()
+{
+ bool ok = true;
+ input_absinfo absInfo;
+ memset(&absInfo, 0, sizeof(input_absinfo));
+ ok &= ioctl(fd, EVIOCGABS(ABS_X), &absInfo) >= 0;
+ if (ok) {
+ minValues.x = absInfo.minimum;
+ maxValues.x = absInfo.maximum;
+ qDebug("evdevtablet: min X: %d max X: %d", minValues.x, maxValues.x);
+ }
+ ok &= ioctl(fd, EVIOCGABS(ABS_Y), &absInfo) >= 0;
+ if (ok) {
+ minValues.y = absInfo.minimum;
+ maxValues.y = absInfo.maximum;
+ qDebug("evdevtablet: min Y: %d max Y: %d", minValues.y, maxValues.y);
+ }
+ if (ioctl(fd, EVIOCGABS(ABS_PRESSURE), &absInfo) >= 0) {
+ minValues.p = absInfo.minimum;
+ maxValues.p = absInfo.maximum;
+ qDebug("evdevtablet: min pressure: %d max pressure: %d", minValues.p, maxValues.p);
+ }
+ if (ioctl(fd, EVIOCGABS(ABS_DISTANCE), &absInfo) >= 0) {
+ minValues.d = absInfo.minimum;
+ maxValues.d = absInfo.maximum;
+ qDebug("evdevtablet: min distance: %d max distance: %d", minValues.d, maxValues.d);
+ }
+ char name[128];
+ if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), name) >= 0) {
+ devName = QString::fromLocal8Bit(name);
+ qDebug("evdevtablet: device name: %s", name);
+ }
+ return ok;
+}
+
+void QEvdevTabletData::processInputEvent(input_event *ev)
+{
+ if (ev->type == EV_ABS) {
+ switch (ev->code) {
+ case ABS_X:
+ state.x = ev->value;
+ break;
+ case ABS_Y:
+ state.y = ev->value;
+ break;
+ case ABS_PRESSURE:
+ state.p = ev->value;
+ break;
+ case ABS_DISTANCE:
+ state.d = ev->value;
+ break;
+ default:
+ break;
+ }
+ } else if (ev->type == EV_KEY) {
+ // code BTN_TOOL_* value 1 -> proximity enter
+ // code BTN_TOOL_* value 0 -> proximity leave
+ // code BTN_TOUCH value 1 -> contact with screen
+ // code BTN_TOUCH value 0 -> no contact
+ switch (ev->code) {
+ case BTN_TOUCH:
+ state.down = ev->value != 0;
+ break;
+ case BTN_TOOL_PEN:
+ state.tool = ev->value ? QTabletEvent::Pen : 0;
+ break;
+ case BTN_TOOL_RUBBER:
+ state.tool = ev->value ? QTabletEvent::Eraser : 0;
+ break;
+ default:
+ break;
+ }
+ } else if (ev->type == EV_SYN && ev->code == SYN_REPORT && lastEventType != ev->type) {
+ report();
+ }
+ lastEventType = ev->type;
+}
+
+void QEvdevTabletData::reportProximityEnter()
+{
+ QWindowSystemInterface::handleTabletEnterProximityEvent(QTabletEvent::Stylus, state.tool, 1);
+}
+
+void QEvdevTabletData::reportProximityLeave()
+{
+ QWindowSystemInterface::handleTabletLeaveProximityEvent(QTabletEvent::Stylus, state.tool, 1);
+}
+
+void QEvdevTabletData::report()
+{
+ if (!state.lastReportTool && state.tool)
+ reportProximityEnter();
+
+ qreal nx = (state.x - minValues.x) / qreal(maxValues.x - minValues.x);
+ qreal ny = (state.y - minValues.y) / qreal(maxValues.y - minValues.y);
+
+ QRect winRect = QGuiApplication::primaryScreen()->geometry();
+ QPointF globalPos(nx * winRect.width(), ny * winRect.height());
+ int pointer = state.tool;
+ // Prevent sending confusing values of 0 when moving the pen outside the active area.
+ if (!state.down && state.lastReportDown) {
+ globalPos = state.lastReportPos;
+ pointer = state.lastReportTool;
+ }
+
+ qreal pressure = (state.p - minValues.p) / qreal(maxValues.p - minValues.p);
+
+ if (state.down || state.lastReportDown) {
+ QWindowSystemInterface::handleTabletEvent(0, state.down, QPointF(), globalPos,
+ QTabletEvent::Stylus, pointer,
+ pressure, 0, 0, 0, 0, 0, 1, qGuiApp->keyboardModifiers());
+ }
+
+ if (state.lastReportTool && !state.tool)
+ reportProximityLeave();
+
+ state.lastReportDown = state.down;
+ state.lastReportTool = state.tool;
+ state.lastReportPos = globalPos;
+}
+
+
+QEvdevTabletHandler::QEvdevTabletHandler(const QString &spec, QObject *parent)
+ : QObject(parent), d(0)
+{
+ setObjectName(QLatin1String("Evdev Tablet Handler"));
+ d = new QEvdevTabletData(this);
+ QString dev;
+ QStringList args = spec.split(QLatin1Char(':'));
+ for (int i = 0; i < args.count(); ++i) {
+ if (args.at(i).startsWith(QLatin1String("/dev/"))) {
+ dev = args.at(i);
+ break;
+ }
+ }
+ if (dev.isEmpty()) {
+ QScopedPointer<QDeviceDiscovery> deviceDiscovery(
+ QDeviceDiscovery::create(QDeviceDiscovery::Device_Tablet, this));
+ if (deviceDiscovery) {
+ QStringList devices = deviceDiscovery->scanConnectedDevices();
+ if (!devices.isEmpty())
+ dev = devices.at(0);
+ }
+ }
+ if (!dev.isEmpty()) {
+ qDebug("evdevtablet: using %s", qPrintable(dev));
+ d->fd = QT_OPEN(dev.toLocal8Bit().constData(), O_RDONLY | O_NDELAY, 0);
+ if (d->fd >= 0 && d->queryLimits()) {
+ d->notifier = new QSocketNotifier(d->fd, QSocketNotifier::Read, this);
+ connect(d->notifier, SIGNAL(activated(int)), this, SLOT(readData()));
+ }
+ }
+}
+
+QEvdevTabletHandler::~QEvdevTabletHandler()
+{
+ delete d->notifier;
+ if (d->fd >= 0)
+ QT_CLOSE(d->fd);
+
+ delete d;
+}
+
+void QEvdevTabletHandler::readData()
+{
+ static input_event buffer[32];
+ int n = 0;
+ for (; ;) {
+ int result = QT_READ(d->fd, reinterpret_cast<char*>(buffer) + n, sizeof(buffer) - n);
+ if (!result) {
+ qWarning("evdevtablet: Got EOF from input device");
+ return;
+ } else if (result < 0) {
+ if (errno != EINTR && errno != EAGAIN) {
+ qErrnoWarning(errno, "evdevtablet: Could not read from input device");
+ if (errno == ENODEV) { // device got disconnected -> stop reading
+ delete d->notifier;
+ d->notifier = 0;
+ QT_CLOSE(d->fd);
+ d->fd = -1;
+ }
+ return;
+ }
+ } else {
+ n += result;
+ if (n % sizeof(input_event) == 0)
+ break;
+ }
+ }
+
+ n /= sizeof(input_event);
+
+ for (int i = 0; i < n; ++i)
+ d->processInputEvent(&buffer[i]);
+}
+
+
+QEvdevTabletHandlerThread::QEvdevTabletHandlerThread(const QString &spec, QObject *parent)
+ : QThread(parent), m_spec(spec), m_handler(0)
+{
+ start();
+}
+
+QEvdevTabletHandlerThread::~QEvdevTabletHandlerThread()
+{
+ quit();
+ wait();
+}
+
+void QEvdevTabletHandlerThread::run()
+{
+ m_handler = new QEvdevTabletHandler(m_spec);
+ exec();
+ delete m_handler;
+ m_handler = 0;
+}
+
+
+QT_END_NAMESPACE
--- /dev/null
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QEVDEVTABLET_P_H
+#define QEVDEVTABLET_P_H
+
+#include <QObject>
+#include <QString>
+#include <QThread>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QEvdevTabletData;
+
+class QEvdevTabletHandler : public QObject
+{
+ Q_OBJECT
+
+public:
+ QEvdevTabletHandler(const QString &spec = QString(), QObject *parent = 0);
+ ~QEvdevTabletHandler();
+
+private slots:
+ void readData();
+
+private:
+ QEvdevTabletData *d;
+};
+
+class QEvdevTabletHandlerThread : public QThread
+{
+public:
+ QEvdevTabletHandlerThread(const QString &spec, QObject *parent = 0);
+ ~QEvdevTabletHandlerThread();
+ void run();
+ QEvdevTabletHandler *handler() { return m_handler; }
+
+private:
+ QString m_spec;
+ QEvdevTabletHandler *m_handler;
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QEVDEVTABLET_P_H
--- /dev/null
+Generic plug-in for accessing pen-based tablets via evdev
+
+To test, run the demo app from examples/widgets/tablet with the
+command-line argument -plugin EvdevTablet
+
+Known to work with 3rd generation Wacom Bamboo Pen & Touch. Recent
+tablets like this one may need an updated wacom kernel driver for
+kernels 3.2 and older.
+
+Supports x, y, pressure, pen & eraser pointer types, proximity enter,
+proximity leave. The additional advanced fields of QTabletEvent will
+not be utilized.
+
+Connecting the tablet will result in two input devices: one for finger
+touch and the tablet buttons, and another for pen input including the
+stylus buttons. This plugin cares about the latter only. For touch,
+try the evdevtouch plugin.
+
+The plugin generates QTabletEvents only. For compatibility with Qt 4,
+TabletPress, Move and Release are only sent when the stylus is
+touching the screen.
+
+TabletEnterProximity and TabletLeaveProximity are always sent to the
+QGuiApplication instance. Use an event filter (or subclass) to handle
+these. In proximity events most of the data (incl. position) will be
+left unspecified as these are mere indication of the fact that the
+stylus entered the range of the tablet.
+
+When running under X, it is likely that no events are received due to
+the input device being grabbed. A temporary workaround is to disable
+the device from X via
+xinput set-prop <device> <device enabled property> 0.
+
+
+TODO #1: Indicate motion when lifted but still in proximity. Needs new
+event types.
+
+TODO #1.1: Where to report ABS_DISTANCE? Needs a new QTabletEvent member
+(unless we hijack z).
+
+TODO #2: QKeyEvent from the stylus buttons (BTN_STYLUS, BTN_STYLUS2,
+but there are no suitable Qt::Key_* constants?)
+
+TODO #3: QKeyEvent in evdevtouch (or this plugin?) from tablet buttons
--- /dev/null
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qgenericplugin_qpa.h>
+#include <QtPlatformSupport/private/qevdevtablet_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QEvdevTabletPlugin : public QGenericPlugin
+{
+ Q_OBJECT
+ Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QGenericPluginFactoryInterface" FILE "evdevtablet.json")
+
+public:
+ QEvdevTabletPlugin();
+
+ QStringList keys() const;
+ QObject* create(const QString &key, const QString &specification);
+};
+
+QEvdevTabletPlugin::QEvdevTabletPlugin()
+{
+}
+
+QStringList QEvdevTabletPlugin::keys() const
+{
+ return QStringList() << "EvdevTablet";
+}
+
+QObject *QEvdevTabletPlugin::create(const QString &key,
+ const QString &spec)
+{
+ if (!key.compare(QLatin1String("EvdevTablet"), Qt::CaseInsensitive))
+ return new QEvdevTabletHandlerThread(spec);
+
+ return 0;
+}
+
+QT_END_NAMESPACE
+
+#include "main.moc"
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