[Interest] gesture on qt4.8.3 not sensitive
Steve (YiLiang) Zhou
szhou at telecomsys.com
Thu Sep 25 08:38:45 CEST 2014
Dear all,
Qt4.8.3 not support multitouch naturally ,so we add some codes to
support it. The guesture example can work and recognize the guestures
,but it's not sensitive and sometimes it can't recognize them.
About the modified codes ,see bellow, and about the touchpoint's center
algorithm ,I don't know whether it's ok.
If you have some advices or you met this before, please help me!
bool QApplicationPrivate::readRX71MultiTouchEvents(int deviceNumber)
{
RX71TouchPointState &touchPointState =
allRX71TouchPoints[deviceNumber];
QSocketNotifier *socketNotifier = touchPointState.socketNotifier;
int fd = socketNotifier->socket();
QTouchEvent::TouchPoint &touchPoint = touchPointState.touchPoint;
bool down = touchPoint.state() != Qt::TouchPointReleased;
if (down)
touchPoint.setState(Qt::TouchPointStationary);
bool changed = false;
for (;;) {
struct input_event inputEvent;
int bytesRead = read(fd, &inputEvent, sizeof(inputEvent));
if (bytesRead <= 0)
break;
if (bytesRead != sizeof(inputEvent)) {
qWarning("Qt: INTERNAL ERROR: short read in
readRX71MultiTouchEvents()");
return false;
}
processMultiTouchEvent(&inputEvent);
....
bool QApplicationPrivate::processMultiTouchEvent(struct input_event
*eventData)
{
bool ret = false;
if(eventData->type == EV_ABS)
{
if(eventData->code == ABS_MT_SLOT)
{
mCurrentSlot = eventData->value;
qDebug("ABS_MT_SLOT:%d\n", eventData->value);
}
if(eventData->code == ABS_MT_TOUCH_MAJOR)
{
mCurrContact.maj = eventData->value;
if (eventData->value == 0) mCurrContact.state =
Qt::TouchPointReleased;
if (mTypeB) mContacts[mCurrentSlot].maj = mCurrContact.maj;
qDebug("ABS_MT_TOUCH_MAJOR:%d\n", mCurrContact.maj);
}
if(eventData->code == ABS_MT_TOUCH_MINOR)
{
qDebug("Code:ABS_MT_TOUCH_MINOR, value:%d\n",
eventData->value);
}
if(eventData->code == ABS_MT_ORIENTATION)
{
qDebug("Code:ABS_MT_ORIENTATION, value:%d\n",
eventData->value);
}
if(eventData->code == ABS_MT_POSITION_X)
{
mCurrContact.x = qBound(hw_range_x_min, eventData->value,
hw_range_x_max);
//mCurrContact.x = eventData->value;
if (mTypeB) mContacts[mCurrentSlot].x = mCurrContact.x;
qDebug("ABS_MT_POSITION_X:%d\n", mCurrContact.x);
}
if(eventData->code == ABS_MT_POSITION_Y)
{
mCurrContact.y = qBound(hw_range_y_min, eventData->value,
hw_range_y_max);
//mCurrContact.y = eventData->value;
if (mTypeB) mContacts[mCurrentSlot].y = mCurrContact.y;
qDebug("ABS_MT_POSITION_Y:%d\n", mCurrContact.y);
}
if(eventData->code == ABS_MT_TRACKING_ID)
{
mCurrContact.trackingId = eventData->value;
if (mTypeB)
{
if (mCurrContact.trackingId == -1)
mContacts[mCurrentSlot].state =
Qt::TouchPointReleased;
else
{
mContacts[mCurrentSlot].trackingId =
mCurrContact.trackingId;
if(mLastEventType == ABS_MT_SLOT)
{
mContacts[mCurrentSlot].state =
Qt::TouchPointPressed;
}
}
}
qDebug("ABS_MT_TRACKING_ID:%d\n", mCurrContact.trackingId);
}
if(eventData->code == ABS_TOOL_WIDTH)
{
qDebug("Code:BS_TOOL_WIDTH, value:%d\n", eventData->value);
}
if(eventData->code == ABS_VOLUME)
{
qDebug("Code:ABS_VOLUME, value:%d\n", eventData->value);
}
if(eventData->code == ABS_PRESSURE)
{
mCurrContact.pressure = qBound(hw_pressure_min,
eventData->value, hw_pressure_max);
//mCurrContact.pressure = eventData->value;
if (mTypeB) mContacts[mCurrentSlot].pressure =
mCurrContact.pressure;
qDebug("ABS_PRESSURE:%d\n", mCurrContact.pressure);
}
}
else if (eventData->type == EV_SYN && eventData->code ==
SYN_MT_REPORT && mLastEventType != EV_SYN)
{
int key = mCurrContact.trackingId;
if (key == -1) key = mContacts.count();
mContacts.insert(key, mCurrContact);
mCurrContact.trackingId = -1;
mCurrContact.x = 0;
mCurrContact.y = 0;
mCurrContact.maj = -1;
mCurrContact.pressure = 0;
mCurrContact.state = Qt::TouchPointPressed;
//mCurrContact.flags = 0;
}
else if (eventData->type == EV_SYN && eventData->code == SYN_REPORT)
{
mTouchPoints.clear();
Qt::TouchPointStates combinedStates;
QMutableHashIterator<int, struct Contact> it(mContacts);
while (it.hasNext())
{
it.next();
QTouchEvent::TouchPoint tp;
struct Contact contact = it.value();
tp.setId(contact.trackingId);
//tp.flags = contact.flags;
int key = mTypeB ? it.key() : contact.trackingId;
if (mLastContacts.contains(key))
{
const Contact &prev(mLastContacts.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 &&
!mLastContacts.contains(key))
{
it.remove();
continue;
}
tp.setState(contact.state);
combinedStates |= tp.state();
QRectF screenRect;
QRect screenGeometry =
QApplication::desktop()->screenGeometry();
QPointF screenPos((contact.x - hw_range_x_min) /
qreal(hw_range_x_max - hw_range_x_min) * screenGeometry.width(),
(contact.y - hw_range_y_min) /
qreal(hw_range_y_max - hw_range_y_min) * screenGeometry.height());
screenRect.setSize(QSizeF(0.0, 0.0));
screenRect.moveCenter(screenPos);
tp.setScreenRect(screenRect);
tp.setNormalizedPos(QPointF(screenPos.x() /
screenGeometry.width(),
screenPos.y() /
screenGeometry.height()));
tp.setPressure(contact.pressure);
mTouchPoints.append(tp);
//qDebug("Add point\n");
if (contact.state == Qt::TouchPointReleased)
it.remove();
}
mLastContacts = mContacts;
if (!mTypeB)
mContacts.clear();
if (!mTouchPoints.isEmpty() && combinedStates !=
Qt::TouchPointStationary)
{
translateRawTouchEvent(0, QTouchEvent::TouchScreen, mTouchPoints);
reportPoints();
ret = true;
}
}
else
{
qWarning("unknow type:%d\n", eventData->type);
}
mLastEventType = eventData->code;
return ret;
}
Thanks and Best Regards
Steve Zhou
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