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-rw-r--r--src/platformsupport/input/evdevtouch/qevdevtouchhandler.cpp665
1 files changed, 665 insertions, 0 deletions
diff --git a/src/platformsupport/input/evdevtouch/qevdevtouchhandler.cpp b/src/platformsupport/input/evdevtouch/qevdevtouchhandler.cpp
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+++ b/src/platformsupport/input/evdevtouch/qevdevtouchhandler.cpp
@@ -0,0 +1,665 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the plugins module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qevdevtouchhandler_p.h"
+#include <QStringList>
+#include <QHash>
+#include <QSocketNotifier>
+#include <QGuiApplication>
+#include <QLoggingCategory>
+#include <QtCore/private/qcore_unix_p.h>
+#include <QtGui/private/qguiapplication_p.h>
+#include <linux/input.h>
+
+#if !defined(QT_NO_MTDEV)
+extern "C" {
+#include <mtdev.h>
+}
+#endif
+
+QT_BEGIN_NAMESPACE
+
+Q_LOGGING_CATEGORY(qLcEvdevTouch, "qt.qpa.input")
+
+/* android (and perhaps some other linux-derived stuff) don't define everything
+ * in linux/input.h, so we'll need to do that ourselves.
+ */
+#ifndef ABS_MT_TOUCH_MAJOR
+#define ABS_MT_TOUCH_MAJOR 0x30 /* Major axis of touching ellipse */
+#endif
+#ifndef ABS_MT_POSITION_X
+#define ABS_MT_POSITION_X 0x35 /* Center X ellipse position */
+#endif
+#ifndef ABS_MT_POSITION_Y
+#define ABS_MT_POSITION_Y 0x36 /* Center Y ellipse position */
+#endif
+#ifndef ABS_MT_SLOT
+#define ABS_MT_SLOT 0x2f
+#endif
+#ifndef ABS_CNT
+#define ABS_CNT (ABS_MAX+1)
+#endif
+#ifndef ABS_MT_TRACKING_ID
+#define ABS_MT_TRACKING_ID 0x39 /* Unique ID of initiated contact */
+#endif
+#ifndef SYN_MT_REPORT
+#define SYN_MT_REPORT 2
+#endif
+
+class QEvdevTouchScreenData
+{
+public:
+ QEvdevTouchScreenData(QEvdevTouchScreenHandler *q_ptr, const QStringList &args);
+
+ void processInputEvent(input_event *data);
+ void assignIds();
+
+ QEvdevTouchScreenHandler *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();
+ void addTouchPoint(const Contact &contact, Qt::TouchPointStates *combinedStates);
+
+ 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;
+ QTransform m_rotate;
+ bool m_singleTouch;
+};
+
+QEvdevTouchScreenData::QEvdevTouchScreenData(QEvdevTouchScreenHandler *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_singleTouch(false)
+{
+ m_forceToActiveWindow = args.contains(QLatin1String("force_window"));
+}
+
+void QEvdevTouchScreenData::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)
+
+#if defined(QT_NO_MTDEV)
+static inline bool testBit(long bit, const long *array)
+{
+ return (array[bit / LONG_BITS] >> bit % LONG_BITS) & 1;
+}
+#endif
+
+QEvdevTouchScreenHandler::QEvdevTouchScreenHandler(const QString &device, const QString &spec, QObject *parent)
+ : QObject(parent), m_notify(0), m_fd(-1), d(0)
+#if !defined(QT_NO_MTDEV)
+ , m_mtdev(0)
+#endif
+{
+ setObjectName(QLatin1String("Evdev Touch Handler"));
+
+ const QStringList args = spec.split(QLatin1Char(':'));
+ int rotationAngle = 0;
+ bool invertx = false;
+ bool inverty = false;
+ for (int i = 0; i < args.count(); ++i) {
+ if (args.at(i).startsWith(QLatin1String("rotate"))) {
+ QString rotateArg = args.at(i).section(QLatin1Char('='), 1, 1);
+ bool ok;
+ uint argValue = rotateArg.toUInt(&ok);
+ if (ok) {
+ switch (argValue) {
+ case 90:
+ case 180:
+ case 270:
+ rotationAngle = argValue;
+ default:
+ break;
+ }
+ }
+ } else if (args.at(i) == QLatin1String("invertx")) {
+ invertx = true;
+ } else if (args.at(i) == QLatin1String("inverty")) {
+ inverty = true;
+ }
+ }
+
+ qCDebug(qLcEvdevTouch, "evdevtouch: Using device %s", qPrintable(device));
+
+ m_fd = QT_OPEN(device.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 {
+ qErrnoWarning(errno, "evdevtouch: Cannot open input device %s", qPrintable(device));
+ return;
+ }
+
+#if !defined(QT_NO_MTDEV)
+ m_mtdev = static_cast<mtdev *>(calloc(1, sizeof(mtdev)));
+ int mtdeverr = mtdev_open(m_mtdev, m_fd);
+ if (mtdeverr) {
+ qWarning("evdevtouch: mtdev_open failed: %d", mtdeverr);
+ QT_CLOSE(m_fd);
+ return;
+ }
+#endif
+
+ d = new QEvdevTouchScreenData(this, args);
+
+#if !defined(QT_NO_MTDEV)
+ const char *mtdevStr = "(mtdev)";
+ d->m_typeB = true;
+#else
+ const char *mtdevStr = "";
+ 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);
+ d->m_singleTouch = !testBit(ABS_MT_POSITION_X, absbits);
+ }
+#endif
+
+ qCDebug(qLcEvdevTouch, "evdevtouch: %s: Protocol type %c %s (%s)", qPrintable(device),
+ d->m_typeB ? 'B' : 'A', mtdevStr, d->m_singleTouch ? "single" : "multi");
+
+ input_absinfo absInfo;
+ memset(&absInfo, 0, sizeof(input_absinfo));
+ bool has_x_range = false, has_y_range = false;
+
+ if (ioctl(m_fd, EVIOCGABS((d->m_singleTouch ? ABS_X : ABS_MT_POSITION_X)), &absInfo) >= 0) {
+ qCDebug(qLcEvdevTouch, "evdevtouch: %s: min X: %d max X: %d", qPrintable(device),
+ absInfo.minimum, absInfo.maximum);
+ d->hw_range_x_min = absInfo.minimum;
+ d->hw_range_x_max = absInfo.maximum;
+ has_x_range = true;
+ }
+
+ if (ioctl(m_fd, EVIOCGABS((d->m_singleTouch ? ABS_Y : ABS_MT_POSITION_Y)), &absInfo) >= 0) {
+ qCDebug(qLcEvdevTouch, "evdevtouch: %s: min Y: %d max Y: %d", qPrintable(device),
+ absInfo.minimum, absInfo.maximum);
+ d->hw_range_y_min = absInfo.minimum;
+ d->hw_range_y_max = absInfo.maximum;
+ has_y_range = true;
+ }
+
+ if (!has_x_range || !has_y_range)
+ qWarning("evdevtouch: %s: Invalid ABS limits, behavior unspecified", qPrintable(device));
+
+ if (ioctl(m_fd, EVIOCGABS(ABS_PRESSURE), &absInfo) >= 0) {
+ qCDebug(qLcEvdevTouch, "evdevtouch: %s: min pressure: %d max pressure: %d", qPrintable(device),
+ 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);
+ qCDebug(qLcEvdevTouch, "evdevtouch: %s: device name: %s", qPrintable(device), name);
+ }
+
+ // Fix up the coordinate ranges for am335x in case the kernel driver does not have them fixed.
+ if (d->hw_name == QLatin1String("ti-tsc")) {
+ if (d->hw_range_x_min == 0 && d->hw_range_x_max == 4095) {
+ d->hw_range_x_min = 165;
+ d->hw_range_x_max = 4016;
+ }
+ if (d->hw_range_y_min == 0 && d->hw_range_y_max == 4095) {
+ d->hw_range_y_min = 220;
+ d->hw_range_y_max = 3907;
+ }
+ qCDebug(qLcEvdevTouch, "evdevtouch: found ti-tsc, overriding: min X: %d max X: %d min Y: %d max Y: %d",
+ d->hw_range_x_min, d->hw_range_x_max, d->hw_range_y_min, d->hw_range_y_max);
+ }
+
+ bool grabSuccess = !ioctl(m_fd, EVIOCGRAB, (void *) 1);
+ if (grabSuccess)
+ ioctl(m_fd, EVIOCGRAB, (void *) 0);
+ else
+ qWarning("evdevtouch: The device is grabbed by another process. No events will be read.");
+
+ if (rotationAngle)
+ d->m_rotate = QTransform::fromTranslate(0.5, 0.5).rotate(rotationAngle).translate(-0.5, -0.5);
+
+ if (invertx)
+ d->m_rotate *= QTransform::fromTranslate(0.5, 0.5).scale(-1.0, 1.0).translate(-0.5, -0.5);
+
+ if (inverty)
+ d->m_rotate *= QTransform::fromTranslate(0.5, 0.5).scale(1.0, -1.0).translate(-0.5, -0.5);
+
+ d->registerDevice();
+}
+
+QEvdevTouchScreenHandler::~QEvdevTouchScreenHandler()
+{
+#if !defined(QT_NO_MTDEV)
+ if (m_mtdev) {
+ mtdev_close(m_mtdev);
+ free(m_mtdev);
+ }
+#endif
+
+ if (m_fd >= 0)
+ QT_CLOSE(m_fd);
+
+ delete d;
+}
+
+void QEvdevTouchScreenHandler::readData()
+{
+ ::input_event buffer[32];
+ int events = 0;
+
+#if !defined(QT_NO_MTDEV)
+ forever {
+ do {
+ events = mtdev_get(m_mtdev, m_fd, buffer, sizeof(buffer) / sizeof(::input_event));
+ // keep trying mtdev_get if we get interrupted. note that we do not
+ // (and should not) handle EAGAIN; EAGAIN means that reading would
+ // block and we'll get back here later to try again anyway.
+ } while (events == -1 && errno == EINTR);
+
+ // 0 events is EOF, -1 means error, handle both in the same place
+ if (events <= 0)
+ goto err;
+
+ // process our shiny new events
+ for (int i = 0; i < events; ++i)
+ d->processInputEvent(&buffer[i]);
+
+ // and try to get more
+ }
+#else
+ int n = 0;
+ for (; ;) {
+ events = QT_READ(m_fd, reinterpret_cast<char*>(buffer) + n, sizeof(buffer) - n);
+ if (events <= 0)
+ goto err;
+ n += events;
+ if (n % sizeof(::input_event) == 0)
+ break;
+ }
+
+ n /= sizeof(::input_event);
+
+ for (int i = 0; i < n; ++i)
+ d->processInputEvent(&buffer[i]);
+#endif
+ return;
+
+err:
+ if (!events) {
+ qWarning("evdevtouch: Got EOF from input device");
+ return;
+ } else if (events < 0) {
+ if (errno != EINTR && errno != EAGAIN) {
+ qErrnoWarning(errno, "evdevtouch: Could not read from input device");
+ if (errno == ENODEV) { // device got disconnected -> stop reading
+ delete m_notify;
+ m_notify = 0;
+ QT_CLOSE(m_fd);
+ m_fd = -1;
+ }
+ return;
+ }
+ }
+}
+
+void QEvdevTouchScreenData::addTouchPoint(const Contact &contact, Qt::TouchPointStates *combinedStates)
+{
+ QWindowSystemInterface::TouchPoint tp;
+ tp.id = contact.trackingId;
+ tp.flags = contact.flags;
+ 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));
+
+ if (!m_rotate.isIdentity())
+ tp.normalPosition = m_rotate.map(tp.normalPosition);
+
+ tp.rawPositions.append(QPointF(contact.x, contact.y));
+
+ m_touchPoints.append(tp);
+}
+
+void QEvdevTouchScreenData::processInputEvent(input_event *data)
+{
+ if (data->type == EV_ABS) {
+
+ if (data->code == ABS_MT_POSITION_X || (m_singleTouch && data->code == ABS_X)) {
+ m_currentData.x = qBound(hw_range_x_min, data->value, hw_range_x_max);
+ if (m_singleTouch)
+ m_contacts[m_currentSlot].x = m_currentData.x;
+ if (m_typeB) {
+ m_contacts[m_currentSlot].x = m_currentData.x;
+ if (m_contacts[m_currentSlot].state == Qt::TouchPointStationary)
+ m_contacts[m_currentSlot].state = Qt::TouchPointMoved;
+ }
+ } else if (data->code == ABS_MT_POSITION_Y || (m_singleTouch && data->code == ABS_Y)) {
+ m_currentData.y = qBound(hw_range_y_min, data->value, hw_range_y_max);
+ if (m_singleTouch)
+ m_contacts[m_currentSlot].y = m_currentData.y;
+ if (m_typeB) {
+ m_contacts[m_currentSlot].y = m_currentData.y;
+ if (m_contacts[m_currentSlot].state == Qt::TouchPointStationary)
+ m_contacts[m_currentSlot].state = Qt::TouchPointMoved;
+ }
+ } 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].state = Qt::TouchPointPressed;
+ 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_singleTouch)
+ m_contacts[m_currentSlot].pressure = m_currentData.pressure;
+ } else if (data->code == ABS_MT_SLOT) {
+ m_currentSlot = data->value;
+ }
+
+ } else if (data->type == EV_KEY && !m_typeB) {
+ if (data->code == BTN_TOUCH && data->value == 0)
+ m_contacts[m_currentSlot].state = Qt::TouchPointReleased;
+ } 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();
+ Contact &contact(it.value());
+
+ if (!contact.state)
+ continue;
+
+ int key = m_typeB ? it.key() : contact.trackingId;
+ if (!m_typeB && 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 (!m_typeB && contact.state == Qt::TouchPointReleased
+ && !m_lastContacts.contains(key)) {
+ it.remove();
+ continue;
+ }
+
+ addTouchPoint(contact, &combinedStates);
+ }
+
+ // Now look for contacts that have disappeared since the last sync.
+ it = m_lastContacts;
+ while (it.hasNext()) {
+ it.next();
+ Contact &contact(it.value());
+ int key = m_typeB ? it.key() : contact.trackingId;
+ if (!m_contacts.contains(key)) {
+ contact.state = Qt::TouchPointReleased;
+ addTouchPoint(contact, &combinedStates);
+ }
+ }
+
+ // Remove contacts that have just been reported as released.
+ it = m_contacts;
+ while (it.hasNext()) {
+ it.next();
+ Contact &contact(it.value());
+
+ if (!contact.state)
+ continue;
+
+ if (contact.state == Qt::TouchPointReleased) {
+ if (m_typeB)
+ contact.state = static_cast<Qt::TouchPointState>(0);
+ else
+ it.remove();
+ } else {
+ contact.state = Qt::TouchPointStationary;
+ }
+ }
+
+ m_lastContacts = m_contacts;
+ if (!m_typeB && !m_singleTouch)
+ m_contacts.clear();
+
+ if (!m_touchPoints.isEmpty() && combinedStates != Qt::TouchPointStationary)
+ reportPoints();
+ }
+
+ m_lastEventType = data->type;
+}
+
+int QEvdevTouchScreenData::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 QEvdevTouchScreenData::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 = 0;
+ 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 QEvdevTouchScreenData::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. Even though we report this as a QRectF, internally
+ // Qt uses QRect/QPoint so we need to bound the size to winRect.size() - QSize(1, 1)
+ const qreal wx = winRect.left() + tp.normalPosition.x() * (winRect.width() - 1);
+ const qreal wy = winRect.top() + tp.normalPosition.y() * (winRect.height() - 1);
+ const qreal sizeRatio = (winRect.width() + winRect.height()) / qreal(hw_w + hw_h);
+ if (tp.area.width() == -1) // touch major was not provided
+ tp.area = QRectF(0, 0, 8, 8);
+ else
+ 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);
+}
+
+
+QEvdevTouchScreenHandlerThread::QEvdevTouchScreenHandlerThread(const QString &device, const QString &spec, QObject *parent)
+ : QThread(parent), m_device(device), m_spec(spec), m_handler(0)
+{
+ start();
+}
+
+QEvdevTouchScreenHandlerThread::~QEvdevTouchScreenHandlerThread()
+{
+ quit();
+ wait();
+}
+
+void QEvdevTouchScreenHandlerThread::run()
+{
+ m_handler = new QEvdevTouchScreenHandler(m_device, m_spec);
+ exec();
+ delete m_handler;
+ m_handler = 0;
+}
+
+
+QT_END_NAMESPACE