void QXcbConnection::xi2HandleEvent(xcb_ge_event_t *event)
{
if (xi2PrepareXIGenericDeviceEvent(event, m_xiOpCode)) {
xXIGenericDeviceEvent *xiEvent = reinterpret_cast<xXIGenericDeviceEvent *>(event);
#ifndef QT_NO_TABLETEVENT
for (int i = 0; i < m_tabletData.count(); ++i) {
if (m_tabletData.at(i).deviceId == xiEvent->deviceid) {
if (xi2HandleTabletEvent(xiEvent, &m_tabletData[i]))
return;
}
}
#endif // QT_NO_TABLETEVENT
#ifdef XCB_USE_XINPUT22
if (xiEvent->evtype == XI_TouchBegin || xiEvent->evtype == XI_TouchUpdate || xiEvent->evtype == XI_TouchEnd) {
xXIDeviceEvent* xiDeviceEvent = reinterpret_cast<xXIDeviceEvent *>(event);
#ifdef XI2_TOUCH_DEBUG
qDebug("XI2 event type %d seq %d detail %d pos 0x%X,0x%X %f,%f root pos %f,%f",
event->event_type, xiEvent->sequenceNumber, xiDeviceEvent->detail,
xiDeviceEvent->event_x, xiDeviceEvent->event_y,
fixed1616ToReal(xiDeviceEvent->event_x), fixed1616ToReal(xiDeviceEvent->event_y),
fixed1616ToReal(xiDeviceEvent->root_x), fixed1616ToReal(xiDeviceEvent->root_y) );
#endif
if (QXcbWindow *platformWindow = platformWindowFromId(xiDeviceEvent->event)) {
XInput2DeviceData *dev = deviceForId(xiEvent->deviceid);
if (xiEvent->evtype == XI_TouchBegin) {
QWindowSystemInterface::TouchPoint tp;
tp.id = xiDeviceEvent->detail % INT_MAX;
tp.state = Qt::TouchPointPressed;
tp.pressure = -1.0;
m_touchPoints[tp.id] = tp;
}
QWindowSystemInterface::TouchPoint &touchPoint = m_touchPoints[xiDeviceEvent->detail];
qreal x = fixed1616ToReal(xiDeviceEvent->root_x);
qreal y = fixed1616ToReal(xiDeviceEvent->root_y);
qreal nx = -1.0, ny = -1.0, w = 0.0, h = 0.0;
QXcbScreen* screen = m_screens.at(0);
for (int i = 0; i < dev->xiDeviceInfo->num_classes; ++i) {
XIAnyClassInfo *classinfo = dev->xiDeviceInfo->classes[i];
if (classinfo->type == XIValuatorClass) {
XIValuatorClassInfo *vci = reinterpret_cast<XIValuatorClassInfo *>(classinfo);
int n = vci->number;
double value;
if (!xi2GetValuatorValueIfSet(xiDeviceEvent, n, &value))
continue;
#ifdef XI2_TOUCH_DEBUG
qDebug(" valuator class label %d value %lf from range %lf -> %lf name %s",
vci->label, value, vci->min, vci->max, XGetAtomName(static_cast<Display *>(m_xlib_display), vci->label) );
#endif
if (vci->label == atom(QXcbAtom::AbsMTPositionX)) {
nx = valuatorNormalized(value, vci);
} else if (vci->label == atom(QXcbAtom::AbsMTPositionY)) {
ny = valuatorNormalized(value, vci);
} else if (vci->label == atom(QXcbAtom::AbsMTTouchMajor)) {
// Convert the value within its range as a fraction of a finger's max (contact patch)
// width in mm, and from there to pixels depending on screen resolution
w = valuatorNormalized(value, vci) * FINGER_MAX_WIDTH_MM *
screen->geometry().width() / screen->physicalSize().width();
} else if (vci->label == atom(QXcbAtom::AbsMTTouchMinor)) {
h = valuatorNormalized(value, vci) * FINGER_MAX_WIDTH_MM *
screen->geometry().height() / screen->physicalSize().height();
} else if (vci->label == atom(QXcbAtom::AbsMTPressure) ||
vci->label == atom(QXcbAtom::AbsPressure)) {
touchPoint.pressure = valuatorNormalized(value, vci);
}
}
}
// If any value was not updated, use the last-known value.
if (nx == -1.0) {
x = touchPoint.area.center().x();
nx = x / screen->geometry().width();
}
if (ny == -1.0) {
y = touchPoint.area.center().y();
ny = y / screen->geometry().height();
}
if (xiEvent->evtype != XI_TouchEnd) {
if (w == 0.0)
w = touchPoint.area.width();
if (h == 0.0)
h = touchPoint.area.height();
}
switch (xiEvent->evtype) {
case XI_TouchUpdate:
if (touchPoint.area.center() != QPoint(x, y))
touchPoint.state = Qt::TouchPointMoved;
else
touchPoint.state = Qt::TouchPointStationary;
break;
case XI_TouchEnd:
touchPoint.state = Qt::TouchPointReleased;
}
touchPoint.area = QRectF(x - w/2, y - h/2, w, h);
touchPoint.normalPosition = QPointF(nx, ny);
#ifdef XI2_TOUCH_DEBUG
qDebug() << " tp " << touchPoint.id << " state " << touchPoint.state << " pos norm " << touchPoint.normalPosition <<
" area " << touchPoint.area << " pressure " << touchPoint.pressure;
#endif
QWindowSystemInterface::handleTouchEvent(platformWindow->window(), xiEvent->time, dev->qtTouchDevice, m_touchPoints.values());
// If a touchpoint was released, we can forget it, because the ID won't be reused.
if (touchPoint.state == Qt::TouchPointReleased)
m_touchPoints.remove(touchPoint.id);
}
}
#endif
}
}
