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Diffstat (limited to 'src/widgets/kernel/qstandardgestures.cpp')
| -rw-r--r-- | src/widgets/kernel/qstandardgestures.cpp | 595 |
1 files changed, 595 insertions, 0 deletions
diff --git a/src/widgets/kernel/qstandardgestures.cpp b/src/widgets/kernel/qstandardgestures.cpp new file mode 100644 index 0000000000..6338ef7afb --- /dev/null +++ b/src/widgets/kernel/qstandardgestures.cpp @@ -0,0 +1,595 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qstandardgestures_p.h" +#include "qgesture.h" +#include "qgesture_p.h" +#include "qevent.h" +#include "qwidget.h" +#include "qabstractscrollarea.h" +#include <qgraphicssceneevent.h> +#include "qdebug.h" + +#ifndef QT_NO_GESTURES + +QT_BEGIN_NAMESPACE + +QPanGestureRecognizer::QPanGestureRecognizer() +{ +} + +QGesture *QPanGestureRecognizer::create(QObject *target) +{ + if (target && target->isWidgetType()) { +#if defined(Q_OS_WIN) && !defined(QT_NO_NATIVE_GESTURES) + // for scroll areas on Windows we want to use native gestures instead + if (!qobject_cast<QAbstractScrollArea *>(target->parent())) + static_cast<QWidget *>(target)->setAttribute(Qt::WA_AcceptTouchEvents); +#else + static_cast<QWidget *>(target)->setAttribute(Qt::WA_AcceptTouchEvents); +#endif + } + return new QPanGesture; +} + +QGestureRecognizer::Result QPanGestureRecognizer::recognize(QGesture *state, + QObject *, + QEvent *event) +{ + QPanGesture *q = static_cast<QPanGesture *>(state); + QPanGesturePrivate *d = q->d_func(); + + const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); + + QGestureRecognizer::Result result; + switch (event->type()) { + case QEvent::TouchBegin: { + result = QGestureRecognizer::MayBeGesture; + QTouchEvent::TouchPoint p = ev->touchPoints().at(0); + d->lastOffset = d->offset = QPointF(); + break; + } + case QEvent::TouchEnd: { + if (q->state() != Qt::NoGesture) { + if (ev->touchPoints().size() == 2) { + QTouchEvent::TouchPoint p1 = ev->touchPoints().at(0); + QTouchEvent::TouchPoint p2 = ev->touchPoints().at(1); + 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; + } + result = QGestureRecognizer::FinishGesture; + } else { + result = QGestureRecognizer::CancelGesture; + } + break; + } + case QEvent::TouchUpdate: { + if (ev->touchPoints().size() >= 2) { + QTouchEvent::TouchPoint p1 = ev->touchPoints().at(0); + QTouchEvent::TouchPoint p2 = ev->touchPoints().at(1); + 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; + if (d->offset.x() > 10 || d->offset.y() > 10 || + d->offset.x() < -10 || d->offset.y() < -10) { + q->setHotSpot(p1.startScreenPos()); + result = QGestureRecognizer::TriggerGesture; + } 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 QPanGestureRecognizer::reset(QGesture *state) +{ + QPanGesture *pan = static_cast<QPanGesture*>(state); + QPanGesturePrivate *d = pan->d_func(); + + d->lastOffset = d->offset = QPointF(); + d->acceleration = 0; + + QGestureRecognizer::reset(state); +} + + +// +// QPinchGestureRecognizer +// + +QPinchGestureRecognizer::QPinchGestureRecognizer() +{ +} + +QGesture *QPinchGestureRecognizer::create(QObject *target) +{ + if (target && target->isWidgetType()) { + static_cast<QWidget *>(target)->setAttribute(Qt::WA_AcceptTouchEvents); + } + return new QPinchGesture; +} + +QGestureRecognizer::Result QPinchGestureRecognizer::recognize(QGesture *state, + QObject *, + QEvent *event) +{ + QPinchGesture *q = static_cast<QPinchGesture *>(state); + QPinchGesturePrivate *d = q->d_func(); + + const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); + + QGestureRecognizer::Result result; + + switch (event->type()) { + case QEvent::TouchBegin: { + result = QGestureRecognizer::MayBeGesture; + break; + } + case QEvent::TouchEnd: { + if (q->state() != Qt::NoGesture) { + result = QGestureRecognizer::FinishGesture; + } else { + result = QGestureRecognizer::CancelGesture; + } + break; + } + case QEvent::TouchUpdate: { + d->changeFlags = 0; + if (ev->touchPoints().size() == 2) { + QTouchEvent::TouchPoint p1 = ev->touchPoints().at(0); + QTouchEvent::TouchPoint p2 = ev->touchPoints().at(1); + + d->hotSpot = p1.screenPos(); + d->isHotSpotSet = true; + + QPointF centerPoint = (p1.screenPos() + p2.screenPos()) / 2.0; + if (d->isNewSequence) { + d->startPosition[0] = p1.screenPos(); + d->startPosition[1] = p2.screenPos(); + d->lastCenterPoint = centerPoint; + } else { + d->lastCenterPoint = d->centerPoint; + } + d->centerPoint = centerPoint; + + d->changeFlags |= QPinchGesture::CenterPointChanged; + + if (d->isNewSequence) { + d->scaleFactor = 1.0; + d->lastScaleFactor = 1.0; + } else { + d->lastScaleFactor = d->scaleFactor; + QLineF line(p1.screenPos(), p2.screenPos()); + QLineF lastLine(p1.lastScreenPos(), p2.lastScreenPos()); + d->scaleFactor = line.length() / lastLine.length(); + } + d->totalScaleFactor = d->totalScaleFactor * d->scaleFactor; + d->changeFlags |= QPinchGesture::ScaleFactorChanged; + + 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 = 0.0; + else + d->lastRotationAngle = d->rotationAngle; + d->rotationAngle = rotationAngle; + d->totalRotationAngle += d->rotationAngle - d->lastRotationAngle; + d->changeFlags |= QPinchGesture::RotationAngleChanged; + + d->totalChangeFlags |= d->changeFlags; + d->isNewSequence = false; + result = QGestureRecognizer::TriggerGesture; + } else { + d->isNewSequence = true; + if (q->state() == Qt::NoGesture) + result = QGestureRecognizer::Ignore; + else + result = QGestureRecognizer::FinishGesture; + } + break; + } + case QEvent::MouseButtonPress: + case QEvent::MouseMove: + case QEvent::MouseButtonRelease: + result = QGestureRecognizer::Ignore; + break; + default: + result = QGestureRecognizer::Ignore; + break; + } + return result; +} + +void QPinchGestureRecognizer::reset(QGesture *state) +{ + QPinchGesture *pinch = static_cast<QPinchGesture *>(state); + QPinchGesturePrivate *d = pinch->d_func(); + + d->totalChangeFlags = d->changeFlags = 0; + + d->startCenterPoint = d->lastCenterPoint = d->centerPoint = QPointF(); + d->totalScaleFactor = d->lastScaleFactor = d->scaleFactor = 1; + 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->velocityValue = 1; + d->time.start(); + 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.restart(); + if (!elapsedTime) + elapsedTime = 1; + d->velocityValue = 0.9 * d->velocityValue + distance / elapsedTime; + 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->velocityValue = 0; + d->time.invalidate(); + + 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(); + q->setHotSpot(ev->touchPoints().at(0).screenPos()); + 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::FinishGesture | QGestureRecognizer::ConsumeEventHint; + } + + const QTouchEvent *ev = static_cast<const QTouchEvent *>(event); + const QMouseEvent *me = static_cast<const QMouseEvent *>(event); +#ifndef QT_NO_GRAPHICSVIEW + const QGraphicsSceneMouseEvent *gsme = static_cast<const QGraphicsSceneMouseEvent *>(event); +#endif + + enum { TapRadius = 40 }; + + switch (event->type()) { +#ifndef QT_NO_GRAPHICSVIEW + case QEvent::GraphicsSceneMousePress: + d->position = gsme->screenPos(); + q->setHotSpot(d->position); + if (d->timerId) + q->killTimer(d->timerId); + d->timerId = q->startTimer(QTapAndHoldGesturePrivate::Timeout); + return QGestureRecognizer::MayBeGesture; // we don't show a sign of life until the timeout +#endif + case QEvent::MouseButtonPress: + d->position = me->globalPos(); + q->setHotSpot(d->position); + if (d->timerId) + q->killTimer(d->timerId); + d->timerId = q->startTimer(QTapAndHoldGesturePrivate::Timeout); + return QGestureRecognizer::MayBeGesture; // we don't show a sign of life until the timeout + case QEvent::TouchBegin: + d->position = ev->touchPoints().at(0).startScreenPos(); + q->setHotSpot(d->position); + if (d->timerId) + q->killTimer(d->timerId); + d->timerId = q->startTimer(QTapAndHoldGesturePrivate::Timeout); + return QGestureRecognizer::MayBeGesture; // we don't show a sign of life until the timeout +#ifndef QT_NO_GRAPHICSVIEW + case QEvent::GraphicsSceneMouseRelease: +#endif + case QEvent::MouseButtonRelease: + case QEvent::TouchEnd: + return QGestureRecognizer::CancelGesture; // get out of the MayBeGesture state + case QEvent::TouchUpdate: + if (d->timerId && ev->touchPoints().size() == 1) { + QTouchEvent::TouchPoint p = ev->touchPoints().at(0); + QPoint delta = p.pos().toPoint() - p.startPos().toPoint(); + if (delta.manhattanLength() <= TapRadius) + return QGestureRecognizer::MayBeGesture; + } + return QGestureRecognizer::CancelGesture; + case QEvent::MouseMove: { + QPoint delta = me->globalPos() - d->position.toPoint(); + if (d->timerId && delta.manhattanLength() <= TapRadius) + return QGestureRecognizer::MayBeGesture; + return QGestureRecognizer::CancelGesture; + } +#ifndef QT_NO_GRAPHICSVIEW + case QEvent::GraphicsSceneMouseMove: { + QPoint delta = gsme->screenPos() - d->position.toPoint(); + if (d->timerId && delta.manhattanLength() <= TapRadius) + return QGestureRecognizer::MayBeGesture; + return QGestureRecognizer::CancelGesture; + } +#endif + default: + return QGestureRecognizer::Ignore; + } +} + +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); +} + +QT_END_NAMESPACE + +#endif // QT_NO_GESTURES |