void ScrollArea::onTouchScrollTimer() {
uint64 nowTime = getms();
if (_touchScrollState == TouchScrollAcceleration && _touchWaitingAcceleration && (nowTime - _touchAccelerationTime) > 40) {
_touchScrollState = TouchScrollManual;
touchResetSpeed();
} else if (_touchScrollState == TouchScrollAuto || _touchScrollState == TouchScrollAcceleration) {
int32 elapsed = int32(nowTime - _touchTime);
QPoint delta = _touchSpeed * elapsed / 1000;
bool hasScrolled = touchScroll(delta);
if (_touchSpeed.isNull() || !hasScrolled) {
_touchScrollState = TouchScrollManual;
_touchScroll = false;
_touchScrollTimer.stop();
} else {
_touchTime = nowTime;
}
touchDeaccelerate(elapsed);
}
}
void ScrollArea::touchEvent(QTouchEvent *e) {
if (!e->touchPoints().isEmpty()) {
_touchPrevPos = _touchPos;
_touchPos = e->touchPoints().cbegin()->screenPos().toPoint();
}
switch (e->type()) {
case QEvent::TouchBegin:
if (_touchPress || e->touchPoints().isEmpty()) return;
_touchPress = true;
if (_touchScrollState == TouchScrollAuto) {
_touchScrollState = TouchScrollAcceleration;
_touchWaitingAcceleration = true;
_touchAccelerationTime = getms();
touchUpdateSpeed();
_touchStart = _touchPos;
} else {
_touchScroll = false;
_touchTimer.start(QApplication::startDragTime());
}
_touchStart = _touchPrevPos = _touchPos;
_touchRightButton = false;
break;
case QEvent::TouchUpdate:
if (!_touchPress) return;
if (!_touchScroll && (_touchPos - _touchStart).manhattanLength() >= QApplication::startDragDistance()) {
_touchTimer.stop();
_touchScroll = true;
touchUpdateSpeed();
}
if (_touchScroll) {
if (_touchScrollState == TouchScrollManual) {
touchScrollUpdated(_touchPos);
} else if (_touchScrollState == TouchScrollAcceleration) {
touchUpdateSpeed();
_touchAccelerationTime = getms();
if (_touchSpeed.isNull()) {
_touchScrollState = TouchScrollManual;
}
}
}
break;
case QEvent::TouchEnd:
if (!_touchPress) return;
_touchPress = false;
if (_touchScroll) {
if (_touchScrollState == TouchScrollManual) {
_touchScrollState = TouchScrollAuto;
_touchPrevPosValid = false;
_touchScrollTimer.start(15);
_touchTime = getms();
} else if (_touchScrollState == TouchScrollAuto) {
_touchScrollState = TouchScrollManual;
_touchScroll = false;
touchResetSpeed();
} else if (_touchScrollState == TouchScrollAcceleration) {
_touchScrollState = TouchScrollAuto;
_touchWaitingAcceleration = false;
_touchPrevPosValid = false;
}
} else if (window() && widget()) { // one short tap -- like left mouse click, one long tap -- like right mouse click
#ifdef Q_OS_WIN
Qt::MouseButton btn(_touchRightButton ? Qt::RightButton : Qt::LeftButton);
QPoint mapped(widget()->mapFromGlobal(_touchStart)), winMapped(window()->mapFromGlobal(_touchStart));
QMouseEvent pressEvent(QEvent::MouseButtonPress, mapped, winMapped, _touchStart, btn, Qt::MouseButtons(btn), Qt::KeyboardModifiers());
pressEvent.accept();
qt_sendSpontaneousEvent(widget(), &pressEvent);
QMouseEvent releaseEvent(QEvent::MouseButtonRelease, mapped, winMapped, _touchStart, btn, Qt::MouseButtons(btn), Qt::KeyboardModifiers());
qt_sendSpontaneousEvent(widget(), &releaseEvent);
if (_touchRightButton) {
QContextMenuEvent contextEvent(QContextMenuEvent::Mouse, mapped, _touchStart);
qt_sendSpontaneousEvent(widget(), &contextEvent);
}
#endif
}
_touchTimer.stop();
_touchRightButton = false;
break;
case QEvent::TouchCancel:
_touchPress = false;
_touchScroll = false;
_touchScrollState = TouchScrollManual;
_touchTimer.stop();
break;
}
}
void ScrollArea::touchEvent(QTouchEvent *e) {
if (!e->touchPoints().isEmpty()) {
_touchPrevPos = _touchPos;
_touchPos = e->touchPoints().cbegin()->screenPos().toPoint();
}
switch (e->type()) {
case QEvent::TouchBegin:
if (_touchPress || e->touchPoints().isEmpty()) return;
_touchPress = true;
if (_touchScrollState == TouchScrollAuto) {
_touchScrollState = TouchScrollAcceleration;
_touchWaitingAcceleration = true;
_touchAccelerationTime = getms();
touchUpdateSpeed();
_touchStart = _touchPos;
} else {
_touchScroll = false;
_touchTimer.start(QApplication::startDragTime());
}
_touchStart = _touchPrevPos = _touchPos;
_touchRightButton = false;
break;
case QEvent::TouchUpdate:
if (!_touchPress) return;
if (!_touchScroll && (_touchPos - _touchStart).manhattanLength() >= QApplication::startDragDistance()) {
_touchTimer.stop();
_touchScroll = true;
touchUpdateSpeed();
}
if (_touchScroll) {
if (_touchScrollState == TouchScrollManual) {
touchScrollUpdated(_touchPos);
} else if (_touchScrollState == TouchScrollAcceleration) {
touchUpdateSpeed();
_touchAccelerationTime = getms();
if (_touchSpeed.isNull()) {
_touchScrollState = TouchScrollManual;
}
}
}
break;
case QEvent::TouchEnd:
if (!_touchPress) return;
_touchPress = false;
if (_touchScroll) {
if (_touchScrollState == TouchScrollManual) {
_touchScrollState = TouchScrollAuto;
_touchPrevPosValid = false;
_touchScrollTimer.start(15);
_touchTime = getms();
} else if (_touchScrollState == TouchScrollAuto) {
_touchScrollState = TouchScrollManual;
_touchScroll = false;
touchResetSpeed();
} else if (_touchScrollState == TouchScrollAcceleration) {
_touchScrollState = TouchScrollAuto;
_touchWaitingAcceleration = false;
_touchPrevPosValid = false;
}
} else if (window()) { // one short tap -- like left mouse click, one long tap -- like right mouse click
Qt::MouseButton btn(_touchRightButton ? Qt::RightButton : Qt::LeftButton);
sendSynteticMouseEvent(this, QEvent::MouseMove, Qt::NoButton, _touchStart);
sendSynteticMouseEvent(this, QEvent::MouseButtonPress, btn, _touchStart);
sendSynteticMouseEvent(this, QEvent::MouseButtonRelease, btn, _touchStart);
if (_touchRightButton) {
auto windowHandle = window()->windowHandle();
auto localPoint = windowHandle->mapFromGlobal(_touchStart);
QContextMenuEvent ev(QContextMenuEvent::Mouse, localPoint, _touchStart, QGuiApplication::keyboardModifiers());
ev.setTimestamp(getms());
QGuiApplication::sendEvent(windowHandle, &ev);
}
}
_touchTimer.stop();
_touchRightButton = false;
break;
case QEvent::TouchCancel:
_touchPress = false;
_touchScroll = false;
_touchScrollState = TouchScrollManual;
_touchTimer.stop();
break;
}
}
