diff options
Diffstat (limited to 'src/plugins/generic/touchscreen/qtouchscreen.cpp')
-rw-r--r-- | src/plugins/generic/touchscreen/qtouchscreen.cpp | 255 |
1 files changed, 141 insertions, 114 deletions
diff --git a/src/plugins/generic/touchscreen/qtouchscreen.cpp b/src/plugins/generic/touchscreen/qtouchscreen.cpp index 1142d0bf0b..b1eac6f359 100644 --- a/src/plugins/generic/touchscreen/qtouchscreen.cpp +++ b/src/plugins/generic/touchscreen/qtouchscreen.cpp @@ -41,28 +41,23 @@ #include "qtouchscreen.h" #include <QStringList> +#include <QHash> #include <QSocketNotifier> -#include <QDebug> #include <QtCore/private/qcore_unix_p.h> #include <linux/input.h> #include <libudev.h> QT_BEGIN_NAMESPACE -//#define POINT_DEBUG - class QTouchScreenData { public: QTouchScreenData(QTouchScreenHandler *q_ptr, const QStringList &args); void processInputEvent(input_event *data); - - void dump(); + void assignIds(); QTouchScreenHandler *q; - QEvent::Type m_state; - QEvent::Type m_prevState; int m_lastEventType; QList<QWindowSystemInterface::TouchPoint> m_touchPoints; @@ -71,17 +66,24 @@ public: int x; int y; int maj; + int pressure; Qt::TouchPointState state; QTouchEvent::TouchPoint::InfoFlags flags; - Contact() : trackingId(0), x(0), y(0), maj(1), state(Qt::TouchPointPressed), flags(0) { } + Contact() : trackingId(-1), + x(0), y(0), maj(1), pressure(0), + state(Qt::TouchPointPressed), flags(0) { } }; - QMap<int, Contact> m_contacts, m_lastContacts; + QHash<int, Contact> m_contacts, m_lastContacts; Contact m_currentData; + int findClosestContact(const QHash<int, Contact> &contacts, int x, int y, int *dist); + 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; QList<QTouchScreenObserver *> m_observers; @@ -89,11 +91,10 @@ public: QTouchScreenData::QTouchScreenData(QTouchScreenHandler *q_ptr, const QStringList &args) : q(q_ptr), - m_state(QEvent::TouchBegin), - m_prevState(m_state), m_lastEventType(-1), hw_range_x_min(0), hw_range_x_max(0), - hw_range_y_min(0), hw_range_y_max(0) + hw_range_y_min(0), hw_range_y_max(0), + hw_pressure_min(0), hw_pressure_max(0) { Q_UNUSED(args); } @@ -101,7 +102,7 @@ QTouchScreenData::QTouchScreenData(QTouchScreenHandler *q_ptr, const QStringList QTouchScreenHandler::QTouchScreenHandler(const QString &spec) : m_notify(0), m_fd(-1), d(0) { - setObjectName(QLatin1String("LinuxInputSubsystem Touch Handler")); + setObjectName(QLatin1String("Linux Touch Handler")); QString dev = QLatin1String("/dev/input/event5"); try_udev(&dev); @@ -126,16 +127,23 @@ QTouchScreenHandler::QTouchScreenHandler(const QString &spec) input_absinfo absInfo; memset(&absInfo, 0, sizeof(input_absinfo)); - if (!ioctl(m_fd, EVIOCGABS(ABS_X), &absInfo) >= 0) { + 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_Y), &absInfo) >= 0) { + 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); @@ -157,11 +165,14 @@ void QTouchScreenHandler::addObserver(QTouchScreenObserver *observer) return; d->m_observers.append(observer); observer->touch_configure(d->hw_range_x_min, d->hw_range_x_max, - d->hw_range_y_min, d->hw_range_y_max); + d->hw_range_y_min, d->hw_range_y_max, + d->hw_pressure_min, d->hw_pressure_max, + d->hw_name); } void QTouchScreenHandler::try_udev(QString *path) { + *path = QString(); udev *u = udev_new(); udev_enumerate *ue = udev_enumerate_new(u); udev_enumerate_add_match_subsystem(ue, "input"); @@ -171,9 +182,10 @@ void QTouchScreenHandler::try_udev(QString *path) udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(ue)) { const char *syspath = udev_list_entry_get_name(entry); udev_device *udevice = udev_device_new_from_syspath(u, syspath); - *path = QString::fromLocal8Bit(udev_device_get_devnode(udevice)); - qDebug("from udev: %s", qPrintable(*path)); + QString candidate = QString::fromLocal8Bit(udev_device_get_devnode(udevice)); udev_device_unref(udevice); + if (path->isEmpty() && candidate.startsWith("/dev/input/event")) + *path = candidate; } udev_enumerate_unref(ue); udev_unref(u); @@ -213,137 +225,152 @@ void QTouchScreenData::processInputEvent(input_event *data) { if (data->type == EV_ABS) { - if (data->code == ABS_MT_POSITION_X) { - m_currentData.x = data->value; - } else if (data->code == ABS_MT_POSITION_Y) { - m_currentData.y = data->value; - } else if (data->code == ABS_MT_TRACKING_ID) { - m_currentData.trackingId = data->value; - if (m_contacts.isEmpty()) - m_currentData.flags |= QTouchEvent::TouchPoint::Primary; - } else if (data->code == ABS_MT_TOUCH_MAJOR) { - m_currentData.maj = data->value; - if (data->value == 0) - m_currentData.state = Qt::TouchPointReleased; - } + if (data->code == ABS_MT_POSITION_X) { + m_currentData.x = qBound(hw_range_x_min, data->value, hw_range_x_max); + } else if (data->code == ABS_MT_POSITION_Y) { + m_currentData.y = qBound(hw_range_y_min, data->value, hw_range_y_max); + } else if (data->code == ABS_MT_TRACKING_ID) { + m_currentData.trackingId = data->value; + } else if (data->code == ABS_MT_TOUCH_MAJOR) { + m_currentData.maj = data->value; + if (data->value == 0) + m_currentData.state = Qt::TouchPointReleased; + } else if (data->code == ABS_PRESSURE) { + m_currentData.pressure = qBound(hw_pressure_min, data->value, hw_pressure_max); + } } else if (data->type == EV_SYN && data->code == SYN_MT_REPORT && m_lastEventType != EV_SYN) { - m_contacts.insert(m_currentData.trackingId, m_currentData); + // 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(); + + // Mark the first point as primary. + if (m_contacts.isEmpty()) + m_currentData.flags |= QTouchEvent::TouchPoint::Primary; + + 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(); - for (QMap<int, Contact>::iterator it = m_contacts.begin(), ite = m_contacts.end(); - it != ite; ++it) { + Qt::TouchPointStates combinedStates; + QMutableHashIterator<int, Contact> it(m_contacts); + while (it.hasNext()) { + it.next(); QWindowSystemInterface::TouchPoint tp; - tp.id = it->trackingId; - tp.flags = it->flags; - tp.pressure = it->state == Qt::TouchPointReleased ? 0 : 1; + Contact &contact(it.value()); + tp.id = contact.trackingId; + tp.flags = contact.flags; - if (m_lastContacts.contains(it->trackingId)) { - const Contact &prev(m_lastContacts.value(it->trackingId)); - if (it->state == Qt::TouchPointReleased) { + if (m_lastContacts.contains(contact.trackingId)) { + const Contact &prev(m_lastContacts.value(contact.trackingId)); + if (contact.state == Qt::TouchPointReleased) { // Copy over the previous values for released points, just in case. - it->x = prev.x; - it->y = prev.y; - it->maj = prev.maj; + contact.x = prev.x; + contact.y = prev.y; + contact.maj = prev.maj; } else { - it->state = (prev.x == it->x && prev.y == it->y) ? Qt::TouchPointStationary : Qt::TouchPointMoved; + contact.state = (prev.x == contact.x && prev.y == contact.y) + ? Qt::TouchPointStationary : Qt::TouchPointMoved; } } - tp.state = it->state; - tp.area = QRectF(it->x, it->y, it->maj, it->maj); + // Avoid reporting a contact in released state more than once. + if (contact.state == Qt::TouchPointReleased + && !m_lastContacts.contains(contact.trackingId)) { + it.remove(); + continue; + } + + tp.state = contact.state; + combinedStates |= tp.state; + + // Store the HW coordinates. Observers can then map it to screen space or something else. + tp.area = QRectF(0, 0, contact.maj, contact.maj); + tp.area.moveCenter(QPoint(contact.x, contact.y)); + tp.pressure = contact.pressure; - // Translate so that (0, 0) is the top-left corner. - const int hw_x = qBound(hw_range_x_min, int(tp.area.left()), hw_range_x_max) - hw_range_x_min; - const int hw_y = qBound(hw_range_y_min, int(tp.area.top()), hw_range_y_max) - hw_range_y_min; // Get a normalized position in range 0..1. - const int hw_w = hw_range_x_max - hw_range_x_min; - const int hw_h = hw_range_y_max - hw_range_y_min; - tp.normalPosition = QPointF(hw_x / qreal(hw_w), - hw_y / qreal(hw_h)); + 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 (m_contacts.isEmpty()) - m_state = QEvent::TouchEnd; + if (contact.state == Qt::TouchPointReleased) + it.remove(); + } m_lastContacts = m_contacts; m_contacts.clear(); - // No need to deliver if all points are stationary. - bool skip = false; - if (m_state == QEvent::TouchUpdate) { - skip = true; - for (int i = 0; i < m_touchPoints.count(); ++i) - if (m_touchPoints.at(i).state != Qt::TouchPointStationary) { - skip = false; - break; - } - } - -#ifdef POINT_DEBUG - dump(); -#endif - - if (!skip && !(m_state == m_prevState && m_state == QEvent::TouchEnd)) + if (!m_touchPoints.isEmpty() && combinedStates != Qt::TouchPointStationary) { for (int i = 0; i < m_observers.count(); ++i) m_observers.at(i)->touch_point(m_touchPoints); - - m_prevState = m_state; - if (m_state == QEvent::TouchBegin) - m_state = QEvent::TouchUpdate; - else if (m_state == QEvent::TouchEnd) - m_state = QEvent::TouchBegin; + } } m_lastEventType = data->type; } -void QTouchScreenData::dump() +int QTouchScreenData::findClosestContact(const QHash<int, Contact> &contacts, int x, int y, int *dist) { - const char *eventType; - switch (m_state) { - case QEvent::TouchBegin: - eventType = "TouchBegin"; - break; - case QEvent::TouchUpdate: - eventType = "TouchUpdate"; - break; - case QEvent::TouchEnd: - eventType = "TouchEnd"; - break; - default: - eventType = "unknown"; - break; + 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; + } } - qDebug() << "touch event" << eventType; - foreach (const QWindowSystemInterface::TouchPoint &tp, m_touchPoints) { - const char *pointState; - switch (tp.state) { - case Qt::TouchPointPressed: - pointState = "pressed"; - break; - case Qt::TouchPointMoved: - pointState = "moved"; - break; - case Qt::TouchPointStationary: - pointState = "stationary"; - break; - case Qt::TouchPointReleased: - pointState = "released"; - break; - default: - pointState = "unknown"; - break; + 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); } - qDebug() << " " << tp.id << tp.area << pointState << tp.normalPosition - << tp.pressure << tp.flags << tp.area.center(); } + m_contacts = newContacts; } |