/**************************************************************************** ** ** Copyright (C) 2010 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 "qgesture.h" #include "private/qgesture_p.h" #include "private/qstandardgestures_p.h" #ifndef QT_NO_GESTURES QT_BEGIN_NAMESPACE /*! \class QGesture \since 4.6 \ingroup gestures \brief The QGesture class represents a gesture, containing properties that describe the corresponding user input. Gesture objects are not constructed directly by developers. They are created by the QGestureRecognizer object that is registered with the application; see QGestureRecognizer::registerRecognizer(). For an overview of gesture handling in Qt and information on using gestures in your applications, see the \l{Gestures Programming} document. \section1 Gesture Properties The class has a list of properties that can be queried by the user to get some gesture-specific arguments. For example, the pinch gesture has a scale factor that is exposed as a property. Developers of custom gesture recognizers can add additional properties in order to provide additional information about a gesture. This can be done by adding new dynamic properties to a QGesture object, or by subclassing the QGesture class (or one of its subclasses). \section1 Lifecycle of a Gesture Object A QGesture instance is implicitly created when needed and is owned by Qt. Developers should never destroy them or store them for later use as Qt may destroy particular instances of them and create new ones to replace them. The registered gesture recognizer monitors the input events for the target object via its \l{QGestureRecognizer::}{recognize()} function, updating the properties of the gesture object as required. The gesture object may be delivered to the target object in a QGestureEvent if the corresponding gesture is active or has just been canceled. Each event that is delivered contains a list of gesture objects, since support for more than one gesture may be enabled for the target object. Due to the way events are handled in Qt, gesture events may be filtered by other objects. \sa QGestureEvent, QGestureRecognizer */ /*! Constructs a new gesture object with the given \a parent. QGesture objects are created by gesture recognizers in the QGestureRecognizer::create() function. */ QGesture::QGesture(QObject *parent) : QObject(*new QGesturePrivate, parent) { d_func()->gestureType = Qt::CustomGesture; } /*! \internal */ QGesture::QGesture(QGesturePrivate &dd, QObject *parent) : QObject(dd, parent) { } /*! Destroys the gesture object. */ QGesture::~QGesture() { } /*! \property QGesture::state \brief the current state of the gesture */ /*! \property QGesture::gestureType \brief the type of the gesture */ /*! \property QGesture::hotSpot \brief The point that is used to find the receiver for the gesture event. The hot-spot is a point in the global coordinate system, use QWidget::mapFromGlobal() or QGestureEvent::mapToGraphicsScene() to get a local hot-spot. The hot-spot should be set by the gesture recognizer to allow gesture event delivery to a QGraphicsObject. */ /*! \property QGesture::hasHotSpot \brief whether the gesture has a hot-spot */ Qt::GestureType QGesture::gestureType() const { return d_func()->gestureType; } Qt::GestureState QGesture::state() const { return d_func()->state; } QPointF QGesture::hotSpot() const { return d_func()->hotSpot; } void QGesture::setHotSpot(const QPointF &value) { Q_D(QGesture); d->hotSpot = value; d->isHotSpotSet = true; } bool QGesture::hasHotSpot() const { return d_func()->isHotSpotSet; } void QGesture::unsetHotSpot() { d_func()->isHotSpotSet = false; } /*! \property QGesture::gestureCancelPolicy \brief the policy for deciding what happens on accepting a gesture On accepting one gesture Qt can automatically cancel other gestures that belong to other targets. The policy is normally set to not cancel any other gestures and can be set to cancel all active gestures in the context. For example for all child widgets. */ /*! \enum QGesture::GestureCancelPolicy This enum describes how accepting a gesture can cancel other gestures automatically. \value CancelNone On accepting this gesture no other gestures will be affected. \value CancelAllInContext On accepting this gesture all gestures that are active in the context (respecting the Qt::GestureFlag that were specified when subscribed to the gesture) will be cancelled. */ void QGesture::setGestureCancelPolicy(GestureCancelPolicy policy) { Q_D(QGesture); d->gestureCancelPolicy = static_cast(policy); } QGesture::GestureCancelPolicy QGesture::gestureCancelPolicy() const { Q_D(const QGesture); return static_cast(d->gestureCancelPolicy); } /*! \class QPanGesture \since 4.6 \brief The QPanGesture class describes a panning gesture made by the user. \ingroup gestures \image pangesture.png For an overview of gesture handling in Qt and information on using gestures in your applications, see the \l{Gestures Programming} document. \sa QPinchGesture, QSwipeGesture */ /*! \property QPanGesture::lastOffset \brief the last offset recorded for this gesture The last offset contains the change in position of the user's input as reported in the \l offset property when a previous gesture event was delivered for this gesture. If no previous event was delivered with information about this gesture (i.e., this gesture object contains information about the first movement in the gesture) then this property contains a zero size. */ /*! \property QPanGesture::offset \brief the total offset from the first input position to the current input position The offset measures the total change in position of the user's input covered by the gesture on the input device. */ /*! \property QPanGesture::delta \brief the offset from the previous input position to the current input This is essentially the same as the difference between offset() and lastOffset(). */ /*! \property QPanGesture::acceleration */ /*! \internal */ QPanGesture::QPanGesture(QObject *parent) : QGesture(*new QPanGesturePrivate, parent) { d_func()->gestureType = Qt::PanGesture; } QPointF QPanGesture::lastOffset() const { return d_func()->lastOffset; } QPointF QPanGesture::offset() const { return d_func()->offset; } QPointF QPanGesture::delta() const { Q_D(const QPanGesture); return d->offset - d->lastOffset; } qreal QPanGesture::acceleration() const { return d_func()->acceleration; } void QPanGesture::setLastOffset(const QPointF &value) { d_func()->lastOffset = value; } void QPanGesture::setOffset(const QPointF &value) { d_func()->offset = value; } void QPanGesture::setAcceleration(qreal value) { d_func()->acceleration = value; } /*! \class QPinchGesture \since 4.6 \brief The QPinchGesture class describes a pinch gesture made my the user. \ingroup touch \ingroup gestures A pinch gesture is a form of touch user input in which the user typically touches two points on the input device with a thumb and finger, before moving them closer together or further apart to change the scale factor, zoom, or level of detail of the user interface. For an overview of gesture handling in Qt and information on using gestures in your applications, see the \l{Gestures Programming} document. \image pinchgesture.png Instead of repeatedly applying the same pinching gesture, the user may continue to touch the input device in one place, and apply a second touch to a new point, continuing the gesture. When this occurs, gesture events will continue to be delivered to the target object, containing an instance of QPinchGesture in the Qt::GestureUpdated state. \sa QPanGesture, QSwipeGesture */ /*! \enum QPinchGesture::ChangeFlag This enum describes the changes that can occur to the properties of the gesture object. \value ScaleFactorChanged The scale factor held by scaleFactor changed. \value RotationAngleChanged The rotation angle held by rotationAngle changed. \value CenterPointChanged The center point held by centerPoint changed. \sa changeFlags, totalChangeFlags */ /*! \property QPinchGesture::totalChangeFlags \brief the property of the gesture that has change This property indicates which of the other properties has changed since the gesture has started. You can use this information to determine which aspect of your user interface needs to be updated. \sa changeFlags, scaleFactor, rotationAngle, centerPoint */ /*! \property QPinchGesture::changeFlags \brief the property of the gesture that has changed in the current step This property indicates which of the other properties has changed since the previous gesture event included information about this gesture. You can use this information to determine which aspect of your user interface needs to be updated. \sa totalChangeFlags, scaleFactor, rotationAngle, centerPoint */ /*! \property QPinchGesture::totalScaleFactor \brief the total scale factor The total scale factor measures the total change in scale factor from the original value to the current scale factor. \sa scaleFactor, lastScaleFactor */ /*! \property QPinchGesture::lastScaleFactor \brief the last scale factor recorded for this gesture The last scale factor contains the scale factor reported in the \l scaleFactor property when a previous gesture event included information about this gesture. If no previous event was delivered with information about this gesture (i.e., this gesture object contains information about the first movement in the gesture) then this property contains zero. \sa scaleFactor, totalScaleFactor */ /*! \property QPinchGesture::scaleFactor \brief the current scale factor The scale factor measures the scale factor associated with the distance between two of the user's inputs on a touch device. \sa totalScaleFactor, lastScaleFactor */ /*! \property QPinchGesture::totalRotationAngle \brief the total angle covered by the gesture This total angle measures the complete angle covered by the gesture. Usually, this is equal to the value held by the \l rotationAngle property, except in the case where the user performs multiple rotations by removing and repositioning one of the touch points, as described above. In this case, the total angle will be the sum of the rotation angles for the multiple stages of the gesture. \sa rotationAngle, lastRotationAngle */ /*! \property QPinchGesture::lastRotationAngle \brief the last reported angle covered by the gesture motion The last rotation angle is the angle as reported in the \l rotationAngle property when a previous gesture event was delivered for this gesture. \sa rotationAngle, totalRotationAngle */ /*! \property QPinchGesture::rotationAngle \brief the angle covered by the gesture motion \sa totalRotationAngle, lastRotationAngle */ /*! \property QPinchGesture::startCenterPoint \brief the starting position of the center point \sa centerPoint, lastCenterPoint */ /*! \property QPinchGesture::lastCenterPoint \brief the last position of the center point recorded for this gesture \sa centerPoint, startCenterPoint */ /*! \property QPinchGesture::centerPoint \brief the current center point The center point is the midpoint between the two input points in the gesture. \sa startCenterPoint, lastCenterPoint */ /*! \internal */ QPinchGesture::QPinchGesture(QObject *parent) : QGesture(*new QPinchGesturePrivate, parent) { d_func()->gestureType = Qt::PinchGesture; } QPinchGesture::ChangeFlags QPinchGesture::totalChangeFlags() const { return d_func()->totalChangeFlags; } void QPinchGesture::setTotalChangeFlags(QPinchGesture::ChangeFlags value) { d_func()->totalChangeFlags = value; } QPinchGesture::ChangeFlags QPinchGesture::changeFlags() const { return d_func()->changeFlags; } void QPinchGesture::setChangeFlags(QPinchGesture::ChangeFlags value) { d_func()->changeFlags = value; } QPointF QPinchGesture::startCenterPoint() const { return d_func()->startCenterPoint; } QPointF QPinchGesture::lastCenterPoint() const { return d_func()->lastCenterPoint; } QPointF QPinchGesture::centerPoint() const { return d_func()->centerPoint; } void QPinchGesture::setStartCenterPoint(const QPointF &value) { d_func()->startCenterPoint = value; } void QPinchGesture::setLastCenterPoint(const QPointF &value) { d_func()->lastCenterPoint = value; } void QPinchGesture::setCenterPoint(const QPointF &value) { d_func()->centerPoint = value; } qreal QPinchGesture::totalScaleFactor() const { return d_func()->totalScaleFactor; } qreal QPinchGesture::lastScaleFactor() const { return d_func()->lastScaleFactor; } qreal QPinchGesture::scaleFactor() const { return d_func()->scaleFactor; } void QPinchGesture::setTotalScaleFactor(qreal value) { d_func()->totalScaleFactor = value; } void QPinchGesture::setLastScaleFactor(qreal value) { d_func()->lastScaleFactor = value; } void QPinchGesture::setScaleFactor(qreal value) { d_func()->scaleFactor = value; } qreal QPinchGesture::totalRotationAngle() const { return d_func()->totalRotationAngle; } qreal QPinchGesture::lastRotationAngle() const { return d_func()->lastRotationAngle; } qreal QPinchGesture::rotationAngle() const { return d_func()->rotationAngle; } void QPinchGesture::setTotalRotationAngle(qreal value) { d_func()->totalRotationAngle = value; } void QPinchGesture::setLastRotationAngle(qreal value) { d_func()->lastRotationAngle = value; } void QPinchGesture::setRotationAngle(qreal value) { d_func()->rotationAngle = value; } /*! \class QSwipeGesture \since 4.6 \brief The QSwipeGesture class describes a swipe gesture made by the user. \ingroup gestures \image swipegesture.png For an overview of gesture handling in Qt and information on using gestures in your applications, see the \l{Gestures Programming} document. \sa QPanGesture, QPinchGesture */ /*! \enum QSwipeGesture::SwipeDirection This enum describes the possible directions for the gesture's motion along the horizontal and vertical axes. \value NoDirection The gesture had no motion associated with it on a particular axis. \value Left The gesture involved a horizontal motion to the left. \value Right The gesture involved a horizontal motion to the right. \value Up The gesture involved an upward vertical motion. \value Down The gesture involved a downward vertical motion. */ /*! \property QSwipeGesture::horizontalDirection \brief the horizontal direction of the gesture If the gesture has a horizontal component, the horizontal direction is either Left or Right; otherwise, it is NoDirection. \sa verticalDirection, swipeAngle */ /*! \property QSwipeGesture::verticalDirection \brief the vertical direction of the gesture If the gesture has a vertical component, the vertical direction is either Up or Down; otherwise, it is NoDirection. \sa horizontalDirection, swipeAngle */ /*! \property QSwipeGesture::swipeAngle \brief the angle of the motion associated with the gesture If the gesture has either a horizontal or vertical component, the swipe angle describes the angle between the direction of motion and the x-axis as defined using the standard widget \l{Coordinate System}{coordinate system}. \sa horizontalDirection, verticalDirection */ /*! \internal */ QSwipeGesture::QSwipeGesture(QObject *parent) : QGesture(*new QSwipeGesturePrivate, parent) { d_func()->gestureType = Qt::SwipeGesture; } QSwipeGesture::SwipeDirection QSwipeGesture::horizontalDirection() const { Q_D(const QSwipeGesture); if (d->swipeAngle < 0 || d->swipeAngle == 90 || d->swipeAngle == 270) return QSwipeGesture::NoDirection; else if (d->swipeAngle < 90 || d->swipeAngle > 270) return QSwipeGesture::Right; else return QSwipeGesture::Left; } QSwipeGesture::SwipeDirection QSwipeGesture::verticalDirection() const { Q_D(const QSwipeGesture); if (d->swipeAngle <= 0 || d->swipeAngle == 180) return QSwipeGesture::NoDirection; else if (d->swipeAngle < 180) return QSwipeGesture::Up; else return QSwipeGesture::Down; } qreal QSwipeGesture::swipeAngle() const { return d_func()->swipeAngle; } void QSwipeGesture::setSwipeAngle(qreal value) { d_func()->swipeAngle = value; } /*! \class QTapGesture \since 4.6 \brief The QTapGesture class describes a tap gesture made by the user. \ingroup gestures For an overview of gesture handling in Qt and information on using gestures in your applications, see the \l{Gestures Programming} document. \sa QPanGesture, QPinchGesture */ /*! \property QTapGesture::position \brief the position of the tap */ /*! \internal */ QTapGesture::QTapGesture(QObject *parent) : QGesture(*new QTapGesturePrivate, parent) { d_func()->gestureType = Qt::TapGesture; } QPointF QTapGesture::position() const { return d_func()->position; } void QTapGesture::setPosition(const QPointF &value) { d_func()->position = value; } /*! \class QTapAndHoldGesture \since 4.6 \brief The QTapAndHoldGesture class describes a tap-and-hold (aka LongTap) gesture made by the user. \ingroup gestures For an overview of gesture handling in Qt and information on using gestures in your applications, see the \l{Gestures Programming} document. \sa QPanGesture, QPinchGesture */ /*! \property QTapAndHoldGesture::position \brief the position of the tap */ /*! \internal */ QTapAndHoldGesture::QTapAndHoldGesture(QObject *parent) : QGesture(*new QTapAndHoldGesturePrivate, parent) { d_func()->gestureType = Qt::TapAndHoldGesture; } QPointF QTapAndHoldGesture::position() const { return d_func()->position; } void QTapAndHoldGesture::setPosition(const QPointF &value) { d_func()->position = value; } /*! Set the timeout, in milliseconds, before the gesture triggers. The recognizer will detect a touch down and and if \a msecs later the touch is still down, it will trigger the QTapAndHoldGesture. The default value is 700 milliseconds. */ // static void QTapAndHoldGesture::setTimeout(int msecs) { QTapAndHoldGesturePrivate::Timeout = msecs; } /*! Gets the timeout, in milliseconds, before the gesture triggers. The recognizer will detect a touch down and and if timeout() later the touch is still down, it will trigger the QTapAndHoldGesture. The default value is 700 milliseconds. */ // static int QTapAndHoldGesture::timeout() { return QTapAndHoldGesturePrivate::Timeout; } int QTapAndHoldGesturePrivate::Timeout = 700; // in ms QT_END_NAMESPACE #include #endif // QT_NO_GESTURES