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authorGirish Ramakrishnan <girish.1.ramakrishnan@nokia.com>2012-05-30 21:38:22 -0700
committerQt by Nokia <qt-info@nokia.com>2012-06-01 01:21:24 +0200
commit3aac6768f837da5df4924280ba2856106e647837 (patch)
tree35e20c35ffc7d6a30b56922ef5efc9f37b2f10ef /src/platformsupport/input/evdevtouch
parent32fa7a54103eef9da9f6eb75274c4ff15793ea44 (diff)
Move evdev to platformsupport
Also wraps various string literals with QLatin1String. Change-Id: Ia0681bfae00006d9e9ad51f05d0e0d0f45cf2cec Reviewed-by: Laszlo Agocs <laszlo.p.agocs@nokia.com> Reviewed-by: Donald Carr <donald.carr@nokia.com>
Diffstat (limited to 'src/platformsupport/input/evdevtouch')
-rw-r--r--src/platformsupport/input/evdevtouch/evdevtouch.pri13
-rw-r--r--src/platformsupport/input/evdevtouch/qevdevtouch.cpp517
-rw-r--r--src/platformsupport/input/evdevtouch/qevdevtouch_p.h98
3 files changed, 628 insertions, 0 deletions
diff --git a/src/platformsupport/input/evdevtouch/evdevtouch.pri b/src/platformsupport/input/evdevtouch/evdevtouch.pri
new file mode 100644
index 0000000000..64c4b9afd9
--- /dev/null
+++ b/src/platformsupport/input/evdevtouch/evdevtouch.pri
@@ -0,0 +1,13 @@
+HEADERS += \
+ $$PWD/qevdevtouch_p.h
+
+SOURCES += \
+ $$PWD/qevdevtouch.cpp
+
+contains(QT_CONFIG, libudev) {
+ LIBS += $$QMAKE_LIBS_LIBUDEV
+}
+
+# DEFINES += USE_MTDEV
+
+contains(DEFINES, USE_MTDEV): LIBS += -lmtdev
diff --git a/src/platformsupport/input/evdevtouch/qevdevtouch.cpp b/src/platformsupport/input/evdevtouch/qevdevtouch.cpp
new file mode 100644
index 0000000000..1369e2ae53
--- /dev/null
+++ b/src/platformsupport/input/evdevtouch/qevdevtouch.cpp
@@ -0,0 +1,517 @@
+/****************************************************************************
+**
+** 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 "qevdevtouch_p.h"
+#include <QStringList>
+#include <QHash>
+#include <QSocketNotifier>
+#include <QGuiApplication>
+#include <QDebug>
+#include <QtCore/private/qcore_unix_p.h>
+#include <QtPlatformSupport/private/qdevicediscovery_p.h>
+#include <linux/input.h>
+
+#ifdef USE_MTDEV
+extern "C" {
+#include <mtdev.h>
+}
+#endif
+
+QT_BEGIN_NAMESPACE
+
+#ifndef ABS_MT_SLOT
+#define ABS_MT_SLOT 0x2f
+#endif
+
+class QTouchScreenData
+{
+public:
+ QTouchScreenData(QTouchScreenHandler *q_ptr, const QStringList &args);
+
+ void processInputEvent(input_event *data);
+ void assignIds();
+
+ QTouchScreenHandler *q;
+ int m_lastEventType;
+ QList<QWindowSystemInterface::TouchPoint> m_touchPoints;
+
+ struct Contact {
+ int trackingId;
+ int x;
+ int y;
+ int maj;
+ int pressure;
+ Qt::TouchPointState state;
+ QTouchEvent::TouchPoint::InfoFlags flags;
+ Contact() : trackingId(-1),
+ x(0), y(0), maj(1), pressure(0),
+ state(Qt::TouchPointPressed), flags(0) { }
+ };
+ QHash<int, Contact> m_contacts; // The key is a tracking id for type A, slot number for type B.
+ QHash<int, Contact> m_lastContacts;
+ Contact m_currentData;
+ int m_currentSlot;
+
+ int findClosestContact(const QHash<int, Contact> &contacts, int x, int y, int *dist);
+ void reportPoints();
+ void registerDevice();
+
+ int hw_range_x_min;
+ int hw_range_x_max;
+ int hw_range_y_min;
+ int hw_range_y_max;
+ int hw_pressure_min;
+ int hw_pressure_max;
+ QString hw_name;
+ bool m_forceToActiveWindow;
+ QTouchDevice *m_device;
+ bool m_typeB;
+};
+
+QTouchScreenData::QTouchScreenData(QTouchScreenHandler *q_ptr, const QStringList &args)
+ : q(q_ptr),
+ m_lastEventType(-1),
+ m_currentSlot(0),
+ hw_range_x_min(0), hw_range_x_max(0),
+ hw_range_y_min(0), hw_range_y_max(0),
+ hw_pressure_min(0), hw_pressure_max(0),
+ m_device(0), m_typeB(false)
+{
+ m_forceToActiveWindow = args.contains(QLatin1String("force_window"));
+}
+
+void QTouchScreenData::registerDevice()
+{
+ m_device = new QTouchDevice;
+ m_device->setName(hw_name);
+ m_device->setType(QTouchDevice::TouchScreen);
+ m_device->setCapabilities(QTouchDevice::Position | QTouchDevice::Area);
+ if (hw_pressure_max > hw_pressure_min)
+ m_device->setCapabilities(m_device->capabilities() | QTouchDevice::Pressure);
+
+ QWindowSystemInterface::registerTouchDevice(m_device);
+}
+
+#define LONG_BITS (sizeof(long) << 3)
+#define NUM_LONGS(bits) (((bits) + LONG_BITS - 1) / LONG_BITS)
+
+static inline bool testBit(long bit, const long *array)
+{
+ return (array[bit / LONG_BITS] >> bit % LONG_BITS) & 1;
+}
+
+QTouchScreenHandler::QTouchScreenHandler(const QString &spec, QObject *parent)
+ : QObject(parent), m_notify(0), m_fd(-1), d(0)
+#ifdef USE_MTDEV
+ , m_mtdev(0)
+#endif
+{
+ setObjectName(QLatin1String("Evdev Touch Handler"));
+
+ QString dev;
+
+ // only the first device argument is used for now
+ 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()) {
+ // try to let udev scan for already connected devices
+ QScopedPointer<QDeviceDiscovery> deviceDiscovery(QDeviceDiscovery::create(QDeviceDiscovery::Device_Touchpad | QDeviceDiscovery::Device_Touchscreen, this));
+ if (deviceDiscovery) {
+ QStringList devices = deviceDiscovery->scanConnectedDevices();
+
+ // only the first device found is used for now
+ if (devices.size() > 0)
+ dev = devices[0];
+ }
+ }
+
+ if (dev.isEmpty())
+ return;
+
+ qDebug("evdevtouch: Using device %s", qPrintable(dev));
+ 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(readData()));
+ } else {
+ qWarning("Cannot open input device '%s': %s", qPrintable(dev), strerror(errno));
+ return;
+ }
+
+#ifdef USE_MTDEV
+ m_mtdev = static_cast<mtdev *>(calloc(1, sizeof(mtdev)));
+ int mtdeverr = mtdev_open(m_mtdev, m_fd);
+ if (mtdeverr) {
+ qWarning("mtdev_open failed: %d", mtdeverr);
+ QT_CLOSE(m_fd);
+ return;
+ }
+#endif
+
+ d = new QTouchScreenData(this, args);
+
+ input_absinfo absInfo;
+ memset(&absInfo, 0, sizeof(input_absinfo));
+ if (ioctl(m_fd, EVIOCGABS(ABS_MT_POSITION_X), &absInfo) >= 0) {
+ qDebug("min X: %d max X: %d", absInfo.minimum, absInfo.maximum);
+ d->hw_range_x_min = absInfo.minimum;
+ d->hw_range_x_max = absInfo.maximum;
+ }
+ if (ioctl(m_fd, EVIOCGABS(ABS_MT_POSITION_Y), &absInfo) >= 0) {
+ qDebug("min Y: %d max Y: %d", absInfo.minimum, absInfo.maximum);
+ d->hw_range_y_min = absInfo.minimum;
+ d->hw_range_y_max = absInfo.maximum;
+ }
+ if (ioctl(m_fd, EVIOCGABS(ABS_PRESSURE), &absInfo) >= 0) {
+ qDebug("min pressure: %d max pressure: %d", absInfo.minimum, absInfo.maximum);
+ if (absInfo.maximum > absInfo.minimum) {
+ d->hw_pressure_min = absInfo.minimum;
+ d->hw_pressure_max = absInfo.maximum;
+ }
+ }
+ char name[1024];
+ if (ioctl(m_fd, EVIOCGNAME(sizeof(name) - 1), name) >= 0) {
+ d->hw_name = QString::fromLocal8Bit(name);
+ qDebug("device name: %s", name);
+ }
+
+#ifdef USE_MTDEV
+ const char *mtdevStr = "(mtdev)";
+ d->m_typeB = true;
+#else
+ const char *mtdevStr = "";
+ d->m_typeB = false;
+ long absbits[NUM_LONGS(ABS_CNT)];
+ if (ioctl(m_fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits) >= 0)
+ d->m_typeB = testBit(ABS_MT_SLOT, absbits);
+#endif
+ qDebug("Protocol type %c %s", d->m_typeB ? 'B' : 'A', mtdevStr);
+
+ d->registerDevice();
+}
+
+QTouchScreenHandler::~QTouchScreenHandler()
+{
+#ifdef USE_MTDEV
+ if (m_mtdev) {
+ mtdev_close(m_mtdev);
+ free(m_mtdev);
+ }
+#endif
+
+ if (m_fd >= 0)
+ QT_CLOSE(m_fd);
+
+ delete d;
+}
+
+void QTouchScreenHandler::readData()
+{
+ ::input_event buffer[32];
+ int n = 0;
+ for (; ;) {
+#ifdef USE_MTDEV
+ int result = mtdev_get(m_mtdev, m_fd, buffer, sizeof(buffer) / sizeof(::input_event));
+ if (result > 0)
+ result *= sizeof(::input_event);
+#else
+ int result = QT_READ(m_fd, reinterpret_cast<char*>(buffer) + n, sizeof(buffer) - n);
+#endif
+ if (!result) {
+ qWarning("Got EOF from input device");
+ return;
+ } else if (result < 0) {
+ if (errno != EINTR && errno != EAGAIN) {
+ qWarning("Could not read from input device: %s", strerror(errno));
+ if (errno == ENODEV) { // device got disconnected -> stop reading
+ delete m_notify;
+ m_notify = 0;
+ QT_CLOSE(m_fd);
+ m_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]);
+}
+
+void QTouchScreenData::processInputEvent(input_event *data)
+{
+ if (data->type == EV_ABS) {
+
+ if (data->code == ABS_MT_POSITION_X) {
+ m_currentData.x = qBound(hw_range_x_min, data->value, hw_range_x_max);
+ if (m_typeB)
+ m_contacts[m_currentSlot].x = m_currentData.x;
+ } else if (data->code == ABS_MT_POSITION_Y) {
+ m_currentData.y = qBound(hw_range_y_min, data->value, hw_range_y_max);
+ if (m_typeB)
+ m_contacts[m_currentSlot].y = m_currentData.y;
+ } else if (data->code == ABS_MT_TRACKING_ID) {
+ m_currentData.trackingId = data->value;
+ if (m_typeB) {
+ if (m_currentData.trackingId == -1)
+ m_contacts[m_currentSlot].state = Qt::TouchPointReleased;
+ else
+ m_contacts[m_currentSlot].trackingId = m_currentData.trackingId;
+ }
+ } else if (data->code == ABS_MT_TOUCH_MAJOR) {
+ m_currentData.maj = data->value;
+ if (data->value == 0)
+ m_currentData.state = Qt::TouchPointReleased;
+ if (m_typeB)
+ m_contacts[m_currentSlot].maj = m_currentData.maj;
+ } else if (data->code == ABS_PRESSURE) {
+ m_currentData.pressure = qBound(hw_pressure_min, data->value, hw_pressure_max);
+ if (m_typeB)
+ m_contacts[m_currentSlot].pressure = m_currentData.pressure;
+ } else if (data->code == ABS_MT_SLOT) {
+ m_currentSlot = data->value;
+ }
+
+ } else if (data->type == EV_SYN && data->code == SYN_MT_REPORT && m_lastEventType != EV_SYN) {
+
+ // If there is no tracking id, one will be generated later.
+ // Until that use a temporary key.
+ int key = m_currentData.trackingId;
+ if (key == -1)
+ key = m_contacts.count();
+
+ m_contacts.insert(key, m_currentData);
+ m_currentData = Contact();
+
+ } else if (data->type == EV_SYN && data->code == SYN_REPORT) {
+
+ // Ensure valid IDs even when the driver does not report ABS_MT_TRACKING_ID.
+ if (!m_contacts.isEmpty() && m_contacts.constBegin().value().trackingId == -1)
+ assignIds();
+
+ m_touchPoints.clear();
+ Qt::TouchPointStates combinedStates;
+ QMutableHashIterator<int, Contact> it(m_contacts);
+ while (it.hasNext()) {
+ it.next();
+ QWindowSystemInterface::TouchPoint tp;
+ Contact &contact(it.value());
+ tp.id = contact.trackingId;
+ tp.flags = contact.flags;
+
+ int key = m_typeB ? it.key() : contact.trackingId;
+ if (m_lastContacts.contains(key)) {
+ const Contact &prev(m_lastContacts.value(key));
+ if (contact.state == Qt::TouchPointReleased) {
+ // Copy over the previous values for released points, just in case.
+ contact.x = prev.x;
+ contact.y = prev.y;
+ contact.maj = prev.maj;
+ } else {
+ contact.state = (prev.x == contact.x && prev.y == contact.y)
+ ? Qt::TouchPointStationary : Qt::TouchPointMoved;
+ }
+ }
+
+ // Avoid reporting a contact in released state more than once.
+ if (contact.state == Qt::TouchPointReleased
+ && !m_lastContacts.contains(key)) {
+ it.remove();
+ continue;
+ }
+
+ tp.state = contact.state;
+ combinedStates |= tp.state;
+
+ // Store the HW coordinates for now, will be updated later.
+ tp.area = QRectF(0, 0, contact.maj, contact.maj);
+ tp.area.moveCenter(QPoint(contact.x, contact.y));
+ tp.pressure = contact.pressure;
+
+ // Get a normalized position in range 0..1.
+ tp.normalPosition = QPointF((contact.x - hw_range_x_min) / qreal(hw_range_x_max - hw_range_x_min),
+ (contact.y - hw_range_y_min) / qreal(hw_range_y_max - hw_range_y_min));
+
+ m_touchPoints.append(tp);
+
+ if (contact.state == Qt::TouchPointReleased)
+ it.remove();
+ }
+
+ m_lastContacts = m_contacts;
+ if (!m_typeB)
+ m_contacts.clear();
+
+ if (!m_touchPoints.isEmpty() && combinedStates != Qt::TouchPointStationary)
+ reportPoints();
+ }
+
+ m_lastEventType = data->type;
+}
+
+int QTouchScreenData::findClosestContact(const QHash<int, Contact> &contacts, int x, int y, int *dist)
+{
+ int minDist = -1, id = -1;
+ for (QHash<int, Contact>::const_iterator it = contacts.constBegin(), ite = contacts.constEnd();
+ it != ite; ++it) {
+ const Contact &contact(it.value());
+ int dx = x - contact.x;
+ int dy = y - contact.y;
+ int dist = dx * dx + dy * dy;
+ if (minDist == -1 || dist < minDist) {
+ minDist = dist;
+ id = contact.trackingId;
+ }
+ }
+ if (dist)
+ *dist = minDist;
+ return id;
+}
+
+void QTouchScreenData::assignIds()
+{
+ QHash<int, Contact> candidates = m_lastContacts, pending = m_contacts, newContacts;
+ int maxId = -1;
+ QHash<int, Contact>::iterator it, ite, bestMatch;
+ while (!pending.isEmpty() && !candidates.isEmpty()) {
+ int bestDist = -1, bestId;
+ for (it = pending.begin(), ite = pending.end(); it != ite; ++it) {
+ int dist;
+ int id = findClosestContact(candidates, it->x, it->y, &dist);
+ if (id >= 0 && (bestDist == -1 || dist < bestDist)) {
+ bestDist = dist;
+ bestId = id;
+ bestMatch = it;
+ }
+ }
+ if (bestDist >= 0) {
+ bestMatch->trackingId = bestId;
+ newContacts.insert(bestId, *bestMatch);
+ candidates.remove(bestId);
+ pending.erase(bestMatch);
+ if (bestId > maxId)
+ maxId = bestId;
+ }
+ }
+ if (candidates.isEmpty()) {
+ for (it = pending.begin(), ite = pending.end(); it != ite; ++it) {
+ it->trackingId = ++maxId;
+ newContacts.insert(it->trackingId, *it);
+ }
+ }
+ m_contacts = newContacts;
+}
+
+void QTouchScreenData::reportPoints()
+{
+ QRect winRect;
+ if (m_forceToActiveWindow) {
+ QWindow *win = QGuiApplication::focusWindow();
+ if (!win)
+ return;
+ winRect = win->geometry();
+ } else {
+ winRect = QGuiApplication::primaryScreen()->geometry();
+ }
+
+ const int hw_w = hw_range_x_max - hw_range_x_min;
+ const int hw_h = hw_range_y_max - hw_range_y_min;
+
+ // Map the coordinates based on the normalized position. QPA expects 'area'
+ // to be in screen coordinates.
+ const int pointCount = m_touchPoints.count();
+ for (int i = 0; i < pointCount; ++i) {
+ QWindowSystemInterface::TouchPoint &tp(m_touchPoints[i]);
+
+ // Generate a screen position that is always inside the active window
+ // or the primary screen.
+ const qreal wx = winRect.left() + tp.normalPosition.x() * winRect.width();
+ const qreal wy = winRect.top() + tp.normalPosition.y() * winRect.height();
+ const qreal sizeRatio = (winRect.width() + winRect.height()) / qreal(hw_w + hw_h);
+ tp.area = QRectF(0, 0, tp.area.width() * sizeRatio, tp.area.height() * sizeRatio);
+ tp.area.moveCenter(QPointF(wx, wy));
+
+ // Calculate normalized pressure.
+ if (!hw_pressure_min && !hw_pressure_max)
+ tp.pressure = tp.state == Qt::TouchPointReleased ? 0 : 1;
+ else
+ tp.pressure = (tp.pressure - hw_pressure_min) / qreal(hw_pressure_max - hw_pressure_min);
+ }
+
+ QWindowSystemInterface::handleTouchEvent(0, m_device, m_touchPoints);
+}
+
+
+QTouchScreenHandlerThread::QTouchScreenHandlerThread(const QString &spec)
+ : m_spec(spec), m_handler(0)
+{
+ start();
+}
+
+QTouchScreenHandlerThread::~QTouchScreenHandlerThread()
+{
+ quit();
+ wait();
+}
+
+void QTouchScreenHandlerThread::run()
+{
+ m_handler = new QTouchScreenHandler(m_spec);
+ exec();
+ delete m_handler;
+ m_handler = 0;
+}
+
+
+QT_END_NAMESPACE
diff --git a/src/platformsupport/input/evdevtouch/qevdevtouch_p.h b/src/platformsupport/input/evdevtouch/qevdevtouch_p.h
new file mode 100644
index 0000000000..63b02f2086
--- /dev/null
+++ b/src/platformsupport/input/evdevtouch/qevdevtouch_p.h
@@ -0,0 +1,98 @@
+/****************************************************************************
+**
+** 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 QEVDEVTOUCH_P_H
+#define QEVDEVTOUCH_P_H
+
+#include <QObject>
+#include <QString>
+#include <QList>
+#include <QThread>
+#include <QWindowSystemInterface>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QSocketNotifier;
+class QTouchScreenData;
+#ifdef USE_MTDEV
+struct mtdev;
+#endif
+
+class QTouchScreenHandler : public QObject
+{
+ Q_OBJECT
+
+public:
+ QTouchScreenHandler(const QString &spec = QString(), QObject *parent = 0);
+ ~QTouchScreenHandler();
+
+private slots:
+ void readData();
+
+private:
+ QSocketNotifier *m_notify;
+ int m_fd;
+ QTouchScreenData *d;
+#ifdef USE_MTDEV
+ mtdev *m_mtdev;
+#endif
+};
+
+class QTouchScreenHandlerThread : public QThread
+{
+public:
+ QTouchScreenHandlerThread(const QString &spec);
+ ~QTouchScreenHandlerThread();
+ void run();
+ QTouchScreenHandler *handler() { return m_handler; }
+
+private:
+ QString m_spec;
+ QTouchScreenHandler *m_handler;
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QEVDEVTOUCH_P_H