diff options
Diffstat (limited to 'src/gui/kernel/qstandardgestures.cpp')
| -rw-r--r-- | src/gui/kernel/qstandardgestures.cpp | 320 |
1 files changed, 314 insertions, 6 deletions
diff --git a/src/gui/kernel/qstandardgestures.cpp b/src/gui/kernel/qstandardgestures.cpp index dfd49eb..0ea4764 100644 --- a/src/gui/kernel/qstandardgestures.cpp +++ b/src/gui/kernel/qstandardgestures.cpp @@ -45,6 +45,7 @@ #include "qevent.h" #include "qwidget.h" #include "qabstractscrollarea.h" +#include "qdebug.h" QT_BEGIN_NAMESPACE @@ -66,7 +67,9 @@ QGesture *QPanGestureRecognizer::create(QObject *target) return new QPanGesture; } -QGestureRecognizer::Result QPanGestureRecognizer::recognize(QGesture *state, QObject *, QEvent *event) +QGestureRecognizer::Result QPanGestureRecognizer::recognize(QGesture *state, + QObject *, + QEvent *event) { QPanGesture *q = static_cast<QPanGesture *>(state); QPanGesturePrivate *d = q->d_func(); @@ -155,7 +158,9 @@ QGesture *QPinchGestureRecognizer::create(QObject *target) return new QPinchGesture; } -QGestureRecognizer::Result QPinchGestureRecognizer::recognize(QGesture *state, QObject *, QEvent *event) +QGestureRecognizer::Result QPinchGestureRecognizer::recognize(QGesture *state, + QObject *, + QEvent *event) { QPinchGesture *q = static_cast<QPinchGesture *>(state); QPinchGesturePrivate *d = q->d_func(); @@ -199,8 +204,9 @@ QGestureRecognizer::Result QPinchGestureRecognizer::recognize(QGesture *state, Q d->centerPoint = centerPoint; d->changeFlags |= QPinchGesture::CenterPointChanged; - const qreal scaleFactor = QLineF(p1.pos(), p2.pos()).length() - / QLineF(d->startPosition[0], d->startPosition[1]).length(); + const qreal scaleFactor = + QLineF(p1.screenPos(), p2.screenPos()).length() + / QLineF(d->startPosition[0], d->startPosition[1]).length(); if (d->isNewSequence) { d->lastScaleFactor = scaleFactor; } else { @@ -210,7 +216,13 @@ QGestureRecognizer::Result QPinchGestureRecognizer::recognize(QGesture *state, Q d->totalScaleFactor += d->scaleFactor - d->lastScaleFactor; d->changeFlags |= QPinchGesture::ScaleFactorChanged; - const qreal rotationAngle = -line.angle(); + qreal angle = QLineF(p1.screenPos(), p2.screenPos()).angle(); + if (angle > 180) + angle -= 360; + qreal startAngle = QLineF(p1.startScreenPos(), p2.startScreenPos()).angle(); + if (startAngle > 180) + startAngle -= 360; + const qreal rotationAngle = startAngle - angle; if (d->isNewSequence) d->lastRotationAngle = rotationAngle; else @@ -224,7 +236,10 @@ QGestureRecognizer::Result QPinchGestureRecognizer::recognize(QGesture *state, Q result = QGestureRecognizer::TriggerGesture; } else { d->isNewSequence = true; - result = QGestureRecognizer::MayBeGesture; + if (q->state() == Qt::NoGesture) + result = QGestureRecognizer::Ignore; + else + result = QGestureRecognizer::FinishGesture; } break; } @@ -252,6 +267,299 @@ void QPinchGestureRecognizer::reset(QGesture *state) d->totalRotationAngle = d->lastRotationAngle = d->rotationAngle = 0; d->isNewSequence = true; + d->startPosition[0] = d->startPosition[1] = QPointF(); + + QGestureRecognizer::reset(state); +} + +// +// QSwipeGestureRecognizer +// + +QSwipeGestureRecognizer::QSwipeGestureRecognizer() +{ +} + +QGesture *QSwipeGestureRecognizer::create(QObject *target) +{ + if (target && target->isWidgetType()) { + static_cast<QWidget *>(target)->setAttribute(Qt::WA_AcceptTouchEvents); + } + return new QSwipeGesture; +} + +QGestureRecognizer::Result QSwipeGestureRecognizer::recognize(QGesture *state, + QObject *, + QEvent *event) +{ + QSwipeGesture *q = static_cast<QSwipeGesture *>(state); + QSwipeGesturePrivate *d = q->d_func(); + + const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); + + QGestureRecognizer::Result result; + + switch (event->type()) { + case QEvent::TouchBegin: { + d->speed = 1; + d->time = QTime::currentTime(); + d->started = true; + result = QGestureRecognizer::MayBeGesture; + break; + } + case QEvent::TouchEnd: { + if (q->state() != Qt::NoGesture) { + result = QGestureRecognizer::FinishGesture; + } else { + result = QGestureRecognizer::CancelGesture; + } + break; + } + case QEvent::TouchUpdate: { + if (!d->started) + result = QGestureRecognizer::CancelGesture; + else if (ev->touchPoints().size() == 3) { + QTouchEvent::TouchPoint p1 = ev->touchPoints().at(0); + QTouchEvent::TouchPoint p2 = ev->touchPoints().at(1); + QTouchEvent::TouchPoint p3 = ev->touchPoints().at(2); + + if (d->lastPositions[0].isNull()) { + d->lastPositions[0] = p1.startScreenPos().toPoint(); + d->lastPositions[1] = p2.startScreenPos().toPoint(); + d->lastPositions[2] = p3.startScreenPos().toPoint(); + } + d->hotSpot = p1.screenPos(); + d->isHotSpotSet = true; + + int xDistance = (p1.screenPos().x() - d->lastPositions[0].x() + + p2.screenPos().x() - d->lastPositions[1].x() + + p3.screenPos().x() - d->lastPositions[2].x()) / 3; + int yDistance = (p1.screenPos().y() - d->lastPositions[0].y() + + p2.screenPos().y() - d->lastPositions[1].y() + + p3.screenPos().y() - d->lastPositions[2].y()) / 3; + + const int distance = xDistance >= yDistance ? xDistance : yDistance; + int elapsedTime = d->time.msecsTo(QTime::currentTime()); + if (!elapsedTime) + elapsedTime = 1; + d->speed = 0.9 * d->speed + distance / elapsedTime; + d->time = QTime::currentTime(); + d->swipeAngle = QLineF(p1.startScreenPos(), p1.screenPos()).angle(); + + static const int MoveThreshold = 50; + if (xDistance > MoveThreshold || yDistance > MoveThreshold) { + // measure the distance to check if the direction changed + d->lastPositions[0] = p1.screenPos().toPoint(); + d->lastPositions[1] = p2.screenPos().toPoint(); + d->lastPositions[2] = p3.screenPos().toPoint(); + QSwipeGesture::SwipeDirection horizontal = + xDistance > 0 ? QSwipeGesture::Right : QSwipeGesture::Left; + QSwipeGesture::SwipeDirection vertical = + yDistance > 0 ? QSwipeGesture::Down : QSwipeGesture::Up; + if (d->verticalDirection == QSwipeGesture::NoDirection) + d->verticalDirection = vertical; + if (d->horizontalDirection == QSwipeGesture::NoDirection) + d->horizontalDirection = horizontal; + if (d->verticalDirection != vertical || d->horizontalDirection != horizontal) { + // the user has changed the direction! + result = QGestureRecognizer::CancelGesture; + } + result = QGestureRecognizer::TriggerGesture; + } else { + if (q->state() != Qt::NoGesture) + result = QGestureRecognizer::TriggerGesture; + else + result = QGestureRecognizer::MayBeGesture; + } + } 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 + result = QGestureRecognizer::MayBeGesture; + } + break; + } + case QEvent::MouseButtonPress: + case QEvent::MouseMove: + case QEvent::MouseButtonRelease: + result = QGestureRecognizer::Ignore; + break; + default: + result = QGestureRecognizer::Ignore; + break; + } + return result; +} + +void QSwipeGestureRecognizer::reset(QGesture *state) +{ + QSwipeGesture *q = static_cast<QSwipeGesture *>(state); + QSwipeGesturePrivate *d = q->d_func(); + + d->verticalDirection = d->horizontalDirection = QSwipeGesture::NoDirection; + d->swipeAngle = 0; + + d->lastPositions[0] = d->lastPositions[1] = d->lastPositions[2] = QPoint(); + d->started = false; + d->speed = 0; + d->time = QTime(); + + QGestureRecognizer::reset(state); +} + +// +// QTapGestureRecognizer +// + +QTapGestureRecognizer::QTapGestureRecognizer() +{ +} + +QGesture *QTapGestureRecognizer::create(QObject *target) +{ + if (target && target->isWidgetType()) { + static_cast<QWidget *>(target)->setAttribute(Qt::WA_AcceptTouchEvents); + } + return new QTapGesture; +} + +QGestureRecognizer::Result QTapGestureRecognizer::recognize(QGesture *state, + QObject *, + QEvent *event) +{ + QTapGesture *q = static_cast<QTapGesture *>(state); + QTapGesturePrivate *d = q->d_func(); + + const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); + + QGestureRecognizer::Result result = QGestureRecognizer::CancelGesture; + + switch (event->type()) { + case QEvent::TouchBegin: { + d->position = ev->touchPoints().at(0).pos(); + result = QGestureRecognizer::TriggerGesture; + break; + } + case QEvent::TouchUpdate: + case QEvent::TouchEnd: { + if (q->state() != Qt::NoGesture && ev->touchPoints().size() == 1) { + QTouchEvent::TouchPoint p = ev->touchPoints().at(0); + QPoint delta = p.pos().toPoint() - p.startPos().toPoint(); + enum { TapRadius = 40 }; + if (delta.manhattanLength() <= TapRadius) { + if (event->type() == QEvent::TouchEnd) + result = QGestureRecognizer::FinishGesture; + else + result = QGestureRecognizer::TriggerGesture; + } + } + break; + } + case QEvent::MouseButtonPress: + case QEvent::MouseMove: + case QEvent::MouseButtonRelease: + result = QGestureRecognizer::Ignore; + break; + default: + result = QGestureRecognizer::Ignore; + break; + } + return result; +} + +void QTapGestureRecognizer::reset(QGesture *state) +{ + QTapGesture *q = static_cast<QTapGesture *>(state); + QTapGesturePrivate *d = q->d_func(); + + d->position = QPointF(); + + QGestureRecognizer::reset(state); +} + +// +// QTapAndHoldGestureRecognizer +// + +QTapAndHoldGestureRecognizer::QTapAndHoldGestureRecognizer() +{ +} + +QGesture *QTapAndHoldGestureRecognizer::create(QObject *target) +{ + if (target && target->isWidgetType()) { + static_cast<QWidget *>(target)->setAttribute(Qt::WA_AcceptTouchEvents); + } + return new QTapAndHoldGesture; +} + +QGestureRecognizer::Result +QTapAndHoldGestureRecognizer::recognize(QGesture *state, QObject *object, + QEvent *event) +{ + QTapAndHoldGesture *q = static_cast<QTapAndHoldGesture *>(state); + QTapAndHoldGesturePrivate *d = q->d_func(); + + if (object == state && event->type() == QEvent::Timer) { + q->killTimer(d->timerId); + d->timerId = 0; + return QGestureRecognizer::Ignore | QGestureRecognizer::ConsumeEventHint; + } + + const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); + + QGestureRecognizer::Result result = QGestureRecognizer::CancelGesture; + + enum { TimerInterval = 2000 }; + enum { TapRadius = 40 }; + + switch (event->type()) { + case QEvent::TouchBegin: + d->position = ev->touchPoints().at(0).pos(); + if (d->timerId) + q->killTimer(d->timerId); + d->timerId = q->startTimer(TimerInterval); + result = QGestureRecognizer::TriggerGesture; + break; + case QEvent::TouchEnd: + if (d->timerId) + result = QGestureRecognizer::CancelGesture; + else + result = QGestureRecognizer::FinishGesture; + break; + case QEvent::TouchUpdate: + if (q->state() != Qt::NoGesture && ev->touchPoints().size() == 1) { + QTouchEvent::TouchPoint p = ev->touchPoints().at(0); + QPoint delta = p.pos().toPoint() - p.startPos().toPoint(); + if (delta.manhattanLength() <= TapRadius) + result = QGestureRecognizer::TriggerGesture; + } + break; + case QEvent::MouseButtonPress: + case QEvent::MouseMove: + case QEvent::MouseButtonRelease: + result = QGestureRecognizer::Ignore; + break; + default: + result = QGestureRecognizer::Ignore; + break; + } + return result; +} + +void QTapAndHoldGestureRecognizer::reset(QGesture *state) +{ + QTapAndHoldGesture *q = static_cast<QTapAndHoldGesture *>(state); + QTapAndHoldGesturePrivate *d = q->d_func(); + + d->position = QPointF(); + if (d->timerId) + q->killTimer(d->timerId); + d->timerId = 0; QGestureRecognizer::reset(state); } |