AuroraMiddleware/qt5base-lts
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send touch update when more points begin after single touch is ignored

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Otherwise, a widget can't detect pinches if the points don't start
simultaneously unless it sets WA_TouchPadAcceptSingleTouchEvents.
The use case is for a widget that doesn't actually want the single
touch events, but only when there are two or more touchpoints.

Task-number: QTBUG-42389
Change-Id: I5269d9acb93a0001c4fde02b1f7b9e0dfcc0032f
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
This commit is contained in:
Shawn Rutledge 2014-11-05 14:51:06 +01:00
parent ea8d4869b7
commit 63f5b1a7fc
2 changed files with 11 additions and 3 deletions
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12
src/widgets/kernel/qapplication.cpp
View File

@ -4230,8 +4230,9 @@ bool QApplicationPrivate::shouldSetFocus(QWidget *w, Qt::FocusPolicy policy)
return true;
}
void QApplicationPrivate::updateTouchPointsForWidget(QWidget *widget, QTouchEvent *touchEvent)
bool QApplicationPrivate::updateTouchPointsForWidget(QWidget *widget, QTouchEvent *touchEvent)
{
bool containsPress = false;
for (int i = 0; i < touchEvent->touchPoints().count(); ++i) {
QTouchEvent::TouchPoint &touchPoint = touchEvent->_touchPoints[i];
@ -4244,7 +4245,11 @@ void QApplicationPrivate::updateTouchPointsForWidget(QWidget *widget, QTouchEven
touchPoint.d->rect = rect;
touchPoint.d->startPos = widget->mapFromGlobal(touchPoint.startScreenPos().toPoint()) + delta;
touchPoint.d->lastPos = widget->mapFromGlobal(touchPoint.lastScreenPos().toPoint()) + delta;
if (touchPoint.state() == Qt::TouchPointPressed)
containsPress = true;
}
return containsPress;
}
void QApplicationPrivate::initializeMultitouch()
@ -4391,11 +4396,14 @@ bool QApplicationPrivate::translateRawTouchEvent(QWidget *window,
QApplication::keyboardModifiers(),
it.value().first,
it.value().second);
updateTouchPointsForWidget(widget, &touchEvent);
bool containsPress = updateTouchPointsForWidget(widget, &touchEvent);
touchEvent.setTimestamp(timestamp);
touchEvent.setWindow(window->windowHandle());
touchEvent.setTarget(widget);
if (containsPress)
widget->setAttribute(Qt::WA_WState_AcceptedTouchBeginEvent);
switch (touchEvent.type()) {
case QEvent::TouchBegin:
{

2
src/widgets/kernel/qapplication_p.h
View File

@ -275,7 +275,7 @@ public:
QPixmap *ignore_cursor;
#endif
static void updateTouchPointsForWidget(QWidget *widget, QTouchEvent *touchEvent);
static bool updateTouchPointsForWidget(QWidget *widget, QTouchEvent *touchEvent);
void initializeMultitouch();
void initializeMultitouch_sys();
void cleanupMultitouch();