diff options
Diffstat (limited to 'src/widgets/kernel/qstandardgestures.cpp')
| -rw-r--r-- | src/widgets/kernel/qstandardgestures.cpp | 76 |
1 files changed, 50 insertions, 26 deletions
diff --git a/src/widgets/kernel/qstandardgestures.cpp b/src/widgets/kernel/qstandardgestures.cpp index 0822c04033..53e5d091fa 100644 --- a/src/widgets/kernel/qstandardgestures.cpp +++ b/src/widgets/kernel/qstandardgestures.cpp @@ -38,16 +38,13 @@ #include "qwidget.h" #include "qabstractscrollarea.h" #include <qgraphicssceneevent.h> +#include <QtGui/QTouchDevice> #include "qdebug.h" #ifndef QT_NO_GESTURES QT_BEGIN_NAMESPACE -QPanGestureRecognizer::QPanGestureRecognizer() -{ -} - QGesture *QPanGestureRecognizer::create(QObject *target) { if (target && target->isWidgetType()) { @@ -62,8 +59,35 @@ QGesture *QPanGestureRecognizer::create(QObject *target) return new QPanGesture; } +static QPointF panOffset(const QList<QTouchEvent::TouchPoint> &touchPoints, int maxCount) +{ + QPointF result; + const int count = qMin(touchPoints.size(), maxCount); + for (int p = 0; p < count; ++p) + result += touchPoints.at(p).pos() - touchPoints.at(p).startPos(); + return result / qreal(count); +} + +// ### fixme: Remove this +// Use single finger pan to scroll QPlainTextEdit/QTextEdit +// by changing the number of pan points to 1 for these classes. +// This used to be Qt 4's behavior on Windows which was achieved using native +// Windows gesture recognizers for these classes. +// The other classes inheriting QScrollArea still use standard 2 finger pan. +// In the long run, they should also use single finger pan to +// scroll on touch screens, however, this requires a distinct Tap&Hold-followed-by-pan +// type gesture to avoid clashes with item view selection and DnD. + +static inline int panTouchPoints(const QTouchEvent *event, const QObject *object, + int defaultTouchPoints) +{ + return event->device()->type() == QTouchDevice::TouchScreen && object && object->parent() + && (object->parent()->inherits("QPlainTextEdit") || object->parent()->inherits("QTextEdit")) + ? 1 : defaultTouchPoints; +} + QGestureRecognizer::Result QPanGestureRecognizer::recognize(QGesture *state, - QObject *, + QObject *object, QEvent *event) { QPanGesture *q = static_cast<QPanGesture *>(state); @@ -76,18 +100,15 @@ QGestureRecognizer::Result QPanGestureRecognizer::recognize(QGesture *state, result = QGestureRecognizer::MayBeGesture; QTouchEvent::TouchPoint p = ev->touchPoints().at(0); d->lastOffset = d->offset = QPointF(); + d->pointCount = panTouchPoints(ev, object, m_pointCount); break; } case QEvent::TouchEnd: { if (q->state() != Qt::NoGesture) { const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); - if (ev->touchPoints().size() == 2) { - QTouchEvent::TouchPoint p1 = ev->touchPoints().at(0); - QTouchEvent::TouchPoint p2 = ev->touchPoints().at(1); + if (ev->touchPoints().size() == d->pointCount) { d->lastOffset = d->offset; - d->offset = - QPointF(p1.pos().x() - p1.startPos().x() + p2.pos().x() - p2.startPos().x(), - p1.pos().y() - p1.startPos().y() + p2.pos().y() - p2.startPos().y()) / 2; + d->offset = panOffset(ev->touchPoints(), d->pointCount); } result = QGestureRecognizer::FinishGesture; } else { @@ -97,16 +118,12 @@ QGestureRecognizer::Result QPanGestureRecognizer::recognize(QGesture *state, } case QEvent::TouchUpdate: { const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); - if (ev->touchPoints().size() >= 2) { - QTouchEvent::TouchPoint p1 = ev->touchPoints().at(0); - QTouchEvent::TouchPoint p2 = ev->touchPoints().at(1); + if (ev->touchPoints().size() >= d->pointCount) { d->lastOffset = d->offset; - d->offset = - QPointF(p1.pos().x() - p1.startPos().x() + p2.pos().x() - p2.startPos().x(), - p1.pos().y() - p1.startPos().y() + p2.pos().y() - p2.startPos().y()) / 2; + d->offset = panOffset(ev->touchPoints(), d->pointCount); if (d->offset.x() > 10 || d->offset.y() > 10 || d->offset.x() < -10 || d->offset.y() < -10) { - q->setHotSpot(p1.startScreenPos()); + q->setHotSpot(ev->touchPoints().first().startScreenPos()); result = QGestureRecognizer::TriggerGesture; } else { result = QGestureRecognizer::MayBeGesture; @@ -283,7 +300,7 @@ QGestureRecognizer::Result QSwipeGestureRecognizer::recognize(QGesture *state, case QEvent::TouchBegin: { d->velocityValue = 1; d->time.start(); - d->started = true; + d->state = QSwipeGesturePrivate::Started; result = QGestureRecognizer::MayBeGesture; break; } @@ -297,9 +314,10 @@ QGestureRecognizer::Result QSwipeGestureRecognizer::recognize(QGesture *state, } case QEvent::TouchUpdate: { const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); - if (!d->started) + if (d->state == QSwipeGesturePrivate::NoGesture) result = QGestureRecognizer::CancelGesture; else if (ev->touchPoints().size() == 3) { + d->state = QSwipeGesturePrivate::ThreePointsReached; QTouchEvent::TouchPoint p1 = ev->touchPoints().at(0); QTouchEvent::TouchPoint p2 = ev->touchPoints().at(1); QTouchEvent::TouchPoint p3 = ev->touchPoints().at(2); @@ -354,12 +372,18 @@ QGestureRecognizer::Result QSwipeGestureRecognizer::recognize(QGesture *state, } else if (ev->touchPoints().size() > 3) { result = QGestureRecognizer::CancelGesture; } else { // less than 3 touch points - if (d->started && (ev->touchPointStates() & Qt::TouchPointPressed)) - result = QGestureRecognizer::CancelGesture; - else if (d->started) - result = QGestureRecognizer::Ignore; - else + switch (d->state) { + case QSwipeGesturePrivate::NoGesture: result = QGestureRecognizer::MayBeGesture; + break; + case QSwipeGesturePrivate::Started: + result = QGestureRecognizer::Ignore; + break; + case QSwipeGesturePrivate::ThreePointsReached: + result = (ev->touchPointStates() & Qt::TouchPointPressed) + ? QGestureRecognizer::CancelGesture : QGestureRecognizer::Ignore; + break; + } } break; } @@ -378,7 +402,7 @@ void QSwipeGestureRecognizer::reset(QGesture *state) d->swipeAngle = 0; d->lastPositions[0] = d->lastPositions[1] = d->lastPositions[2] = QPoint(); - d->started = false; + d->state = QSwipeGesturePrivate::NoGesture; d->velocityValue = 0; d->time.invalidate(); |