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Diffstat (limited to 'src/declarative/items/qquickmultipointtoucharea.cpp')
| -rw-r--r-- | src/declarative/items/qquickmultipointtoucharea.cpp | 729 |
1 files changed, 0 insertions, 729 deletions
diff --git a/src/declarative/items/qquickmultipointtoucharea.cpp b/src/declarative/items/qquickmultipointtoucharea.cpp deleted file mode 100644 index f7fdf97fb7..0000000000 --- a/src/declarative/items/qquickmultipointtoucharea.cpp +++ /dev/null @@ -1,729 +0,0 @@ -/**************************************************************************** -** -** 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 QtDeclarative module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** 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. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qquickmultipointtoucharea_p.h" -#include <qquickcanvas.h> -#include <QEvent> -#include <QMouseEvent> -#include <math.h> -#include <QDebug> - -QT_BEGIN_NAMESPACE - -/*! - \qmlclass TouchPoint QQuickTouchPoint - \inqmlmodule QtQuick 2 - \ingroup qml-event-elements - \brief The TouchPoint element describes a touch point in a MultiPointTouchArea. - - The TouchPoint element contains information about a touch point, such as the current - position, pressure, and area. -*/ - -/*! - \qmlproperty int QtQuick2::TouchPoint::pointId - - This property holds the point id of the touch point. - - Each touch point within a MultiPointTouchArea will have a unique id. -*/ -void QQuickTouchPoint::setPointId(int id) -{ - if (_id == id) - return; - _id = id; - emit pointIdChanged(); -} - -/*! - \qmlproperty real QtQuick2::TouchPoint::x - \qmlproperty real QtQuick2::TouchPoint::y - - These properties hold the current position of the touch point. -*/ - -void QQuickTouchPoint::setX(qreal x) -{ - if (_x == x) - return; - _x = x; - emit xChanged(); -} - -void QQuickTouchPoint::setY(qreal y) -{ - if (_y == y) - return; - _y = y; - emit yChanged(); -} - -/*! - \qmlproperty real QtQuick2::TouchPoint::pressure - \qmlproperty rectangle QtQuick2::TouchPoint::area - - These properties hold additional information about the current state of the touch point. - - \list - \i \c pressure is a value in the range of 0.0 to 1.0. - \i \c area is a rectangle covering the area of the touch point, centered on the current position of the touch point. - \endlist -*/ -void QQuickTouchPoint::setPressure(qreal pressure) -{ - if (_pressure == pressure) - return; - _pressure = pressure; - emit pressureChanged(); -} - -void QQuickTouchPoint::setArea(const QRectF &area) -{ - if (_area == area) - return; - _area = area; - emit areaChanged(); -} - -/*! - \qmlproperty bool QtQuick2::TouchPoint::valid - - This property holds whether the touch point is valid. - - An invalid touch point is one that has not yet been pressed, - or has already been released. -*/ -void QQuickTouchPoint::setValid(bool valid) -{ - if (_valid == valid) - return; - _valid = valid; - emit validityChanged(); -} - -/*! - \qmlproperty real QtQuick2::TouchPoint::startX - \qmlproperty real QtQuick2::TouchPoint::startY - - These properties hold the starting position of the touch point. -*/ - -void QQuickTouchPoint::setStartX(qreal startX) -{ - if (_startX == startX) - return; - _startX = startX; - emit startXChanged(); -} - -void QQuickTouchPoint::setStartY(qreal startY) -{ - if (_startY == startY) - return; - _startY = startY; - emit startYChanged(); -} - -/*! - \qmlproperty real QtQuick2::TouchPoint::previousX - \qmlproperty real QtQuick2::TouchPoint::previousY - - These properties hold the previous position of the touch point. -*/ -void QQuickTouchPoint::setPreviousX(qreal previousX) -{ - if (_previousX == previousX) - return; - _previousX = previousX; - emit previousXChanged(); -} - -void QQuickTouchPoint::setPreviousY(qreal previousY) -{ - if (_previousY == previousY) - return; - _previousY = previousY; - emit previousYChanged(); -} - -/*! - \qmlproperty real QtQuick2::TouchPoint::sceneX - \qmlproperty real QtQuick2::TouchPoint::sceneY - - These properties hold the current position of the touch point in scene coordinates. -*/ - -void QQuickTouchPoint::setSceneX(qreal sceneX) -{ - if (_sceneX == sceneX) - return; - _sceneX = sceneX; - emit sceneXChanged(); -} - -void QQuickTouchPoint::setSceneY(qreal sceneY) -{ - if (_sceneY == sceneY) - return; - _sceneY = sceneY; - emit sceneYChanged(); -} - -/*! - \qmlclass MultiPointTouchArea QQuickMultiPointTouchArea - \inqmlmodule QtQuick 2 - \brief The MultiPointTouchArea item enables handling of multiple touch points. - \inherits Item - - A MultiPointTouchArea is an invisible item that is used to track multiple touch points. - - The \l enabled property is used to enable and disable touch handling. When disabled, - the touch area becomes transparent to mouse/touch events. - - MultiPointTouchArea can be used in two ways: - - \list - \o setting \c touchPoints to provide touch point objects with properties that can be bound to - \o using the onTouchUpdated or onTouchPointsPressed, onTouchPointsUpdated and onTouchPointsReleased handlers - \endlist - - While a MultiPointTouchArea \i can take exclusive ownership of certain touch points, it is also possible to have - multiple MultiPointTouchAreas active at the same time, each operating on a different set of touch points. - - \sa TouchPoint -*/ - -/*! - \qmlsignal QtQuick2::MultiPointTouchArea::touchPointsPressed(list<TouchPoint> touchPoints) - - This handler is called when new touch points are added. \a touchPoints is a list of these new points. - - If minimumTouchPoints is set to a value greater than one, this handler will not be called until the minimum number - of required touch points has been reached. At that point, touchPointsPressed will be called with all the current touch points. -*/ - -/*! - \qmlsignal QtQuick2::MultiPointTouchArea::touchPointsUpdated(list<TouchPoint> touchPoints) - - This handler is called when existing touch points are updated. \a touchPoints is a list of these updated points. -*/ - -/*! - \qmlsignal QtQuick2::MultiPointTouchArea::touchPointsReleased(list<TouchPoint> touchPoints) - - This handler is called when existing touch points are removed. \a touchPoints is a list of these removed points. -*/ - -/*! - \qmlsignal QtQuick2::MultiPointTouchArea::touchPointsCanceled(list<TouchPoint> touchPoints) - - This handler is called when new touch events have been canceled because another element stole the touch event handling. - - This signal is for advanced use: it is useful when there is more than one MultiPointTouchArea - that is handling input, or when there is a MultiPointTouchArea inside a \l Flickable. In the latter - case, if you execute some logic on the touchPointsPressed signal and then start dragging, the - \l Flickable may steal the touch handling from the MultiPointTouchArea. In these cases, to reset - the logic when the MultiPointTouchArea has lost the touch handling to the \l Flickable, - \c onTouchPointsCanceled should be used in addition to onTouchPointsReleased. - - \a touchPoints is the list of canceled points. -*/ - -/*! - \qmlsignal QtQuick2::MultiPointTouchArea::gestureStarted(GestureEvent gesture) - - This handler is called when the global drag threshold has been reached. - - This function is typically used when a MultiPointTouchAreas has been nested in a Flickable or another MultiPointTouchArea. - Wnen the threshold has been reached, and the handler called, you can determine whether or not the touch - area should grab the current touch points. By default they will not be grabbed; to grab them call \c gesture.grab(). If the - gesture is not grabbed, the nesting Flickable, for example, would also have an opportunity to grab. - - The gesture object also includes information on the current set of \c touchPoints and the \c dragThreshold. -*/ - -/*! - \qmlsignal QtQuick2::MultiPointTouchArea::touchUpdated(list<TouchPoint> touchPoints) - - This handler is called when the touch points handled by the MultiPointTouchArea change. This includes adding new touch points, - removing previous touch points, as well as updating current touch point data. \a touchPoints is the list of all current touch - points. -*/ - -/*! - \qmlproperty list<TouchPoint> QtQuick2::MultiPointTouchArea::touchPoints - - This property holds a set of user-defined touch point objects that can be bound to. - - In the following example, we have two small rectangles that follow our touch points. - - \snippet doc/src/snippets/declarative/multipointtoucharea/multipointtoucharea.qml 0 - - By default this property holds an empty list. - - \sa TouchPoint -*/ - -QQuickMultiPointTouchArea::QQuickMultiPointTouchArea(QQuickItem *parent) - : QQuickItem(parent), - _minimumTouchPoints(0), - _maximumTouchPoints(INT_MAX), - _stealMouse(false) -{ - setAcceptedMouseButtons(Qt::LeftButton); - setFiltersChildMouseEvents(true); -} - -QQuickMultiPointTouchArea::~QQuickMultiPointTouchArea() -{ - clearTouchLists(); - foreach (QObject *obj, _touchPoints) { - QQuickTouchPoint *dtp = static_cast<QQuickTouchPoint*>(obj); - if (!dtp->isQmlDefined()) - delete dtp; - } -} - -/*! - \qmlproperty int QtQuick2::MultiPointTouchArea::minimumTouchPoints - \qmlproperty int QtQuick2::MultiPointTouchArea::maximumTouchPoints - - These properties hold the range of touch points to be handled by the touch area. - - These are convenience that allow you to, for example, have nested MultiPointTouchAreas, - one handling two finger touches, and another handling three finger touches. - - By default, all touch points within the touch area are handled. -*/ - -int QQuickMultiPointTouchArea::minimumTouchPoints() const -{ - return _minimumTouchPoints; -} - -void QQuickMultiPointTouchArea::setMinimumTouchPoints(int num) -{ - if (_minimumTouchPoints == num) - return; - _minimumTouchPoints = num; - emit minimumTouchPointsChanged(); -} - -int QQuickMultiPointTouchArea::maximumTouchPoints() const -{ - return _maximumTouchPoints; -} - -void QQuickMultiPointTouchArea::setMaximumTouchPoints(int num) -{ - if (_maximumTouchPoints == num) - return; - _maximumTouchPoints = num; - emit maximumTouchPointsChanged(); -} - -void QQuickMultiPointTouchArea::touchEvent(QTouchEvent *event) -{ - switch (event->type()) { - case QEvent::TouchBegin: - case QEvent::TouchUpdate: - case QEvent::TouchEnd: { - //if e.g. a parent Flickable has the mouse grab, don't process the touch events - QQuickCanvas *c = canvas(); - QQuickItem *grabber = c ? c->mouseGrabberItem() : 0; - if (grabber && grabber != this && grabber->keepMouseGrab() && grabber->isEnabled()) { - QQuickItem *item = this; - while ((item = item->parentItem())) { - if (item == grabber) - return; - } - } - updateTouchData(event); - if (event->type() == QEvent::TouchEnd) { - //TODO: move to canvas - _stealMouse = false; - setKeepMouseGrab(false); - QQuickCanvas *c = canvas(); - if (c && c->mouseGrabberItem() == this) - ungrabMouse(); - setKeepTouchGrab(false); - ungrabTouchPoints(); - } - break; - } - default: - QQuickItem::touchEvent(event); - break; - } -} - -void QQuickMultiPointTouchArea::grabGesture() -{ - _stealMouse = true; - - grabMouse(); - setKeepMouseGrab(true); - - grabTouchPoints(_touchPoints.keys()); - setKeepTouchGrab(true); -} - -void QQuickMultiPointTouchArea::updateTouchData(QEvent *event) -{ - bool ended = false; - bool moved = false; - bool started = false; - - clearTouchLists(); - QTouchEvent *e = static_cast<QTouchEvent*>(event); - QList<QTouchEvent::TouchPoint> touchPoints = e->touchPoints(); - int numTouchPoints = touchPoints.count(); - //always remove released touches, and make sure we handle all releases before adds. - foreach (QTouchEvent::TouchPoint p, touchPoints) { - Qt::TouchPointState touchPointState = p.state(); - int id = p.id(); - if (touchPointState & Qt::TouchPointReleased) { - QQuickTouchPoint* dtp = static_cast<QQuickTouchPoint*>(_touchPoints.value(id)); - if (!dtp) - continue; - _releasedTouchPoints.append(dtp); - _touchPoints.remove(id); - ended = true; - } - } - if (numTouchPoints >= _minimumTouchPoints && numTouchPoints <= _maximumTouchPoints) { - foreach (QTouchEvent::TouchPoint p, touchPoints) { - Qt::TouchPointState touchPointState = p.state(); - int id = p.id(); - if (touchPointState & Qt::TouchPointReleased) { - //handled above - } else if (!_touchPoints.contains(id)) { //could be pressed, moved, or stationary - addTouchPoint(&p); - started = true; - } else if (touchPointState & Qt::TouchPointMoved) { - QQuickTouchPoint* dtp = static_cast<QQuickTouchPoint*>(_touchPoints[id]); - Q_ASSERT(dtp); - _movedTouchPoints.append(dtp); - updateTouchPoint(dtp,&p); - moved = true; - } else { - QQuickTouchPoint* dtp = static_cast<QQuickTouchPoint*>(_touchPoints[id]); - Q_ASSERT(dtp); - updateTouchPoint(dtp,&p); - } - } - - //see if we should be grabbing the gesture - if (!_stealMouse /* !ignoring gesture*/) { - bool offerGrab = false; - const int dragThreshold = qApp->styleHints()->startDragDistance(); - foreach (const QTouchEvent::TouchPoint &p, touchPoints) { - if (p.state() == Qt::TouchPointReleased) - continue; - const QPointF ¤tPos = p.scenePos(); - const QPointF &startPos = p.startScenePos(); - if (qAbs(currentPos.x() - startPos.x()) > dragThreshold) - offerGrab = true; - else if (qAbs(currentPos.y() - startPos.y()) > dragThreshold) - offerGrab = true; - if (offerGrab) - break; - } - - if (offerGrab) { - QQuickGrabGestureEvent event; - event._touchPoints = _touchPoints.values(); - emit gestureStarted(&event); - if (event.wantsGrab()) - grabGesture(); - } - } - - if (ended) emit(touchPointsReleased(_releasedTouchPoints)); - if (moved) emit(touchPointsUpdated(_movedTouchPoints)); - if (started) emit(touchPointsPressed(_pressedTouchPoints)); - if (!_touchPoints.isEmpty()) emit touchUpdated(_touchPoints.values()); - } -} - -void QQuickMultiPointTouchArea::clearTouchLists() -{ - foreach (QObject *obj, _releasedTouchPoints) { - QQuickTouchPoint *dtp = static_cast<QQuickTouchPoint*>(obj); - if (!dtp->isQmlDefined()) - delete dtp; - else - dtp->setValid(false); - } - _releasedTouchPoints.clear(); - _pressedTouchPoints.clear(); - _movedTouchPoints.clear(); -} - -void QQuickMultiPointTouchArea::addTouchPoint(const QTouchEvent::TouchPoint *p) -{ - QQuickTouchPoint *dtp = 0; - foreach (QQuickTouchPoint* tp, _touchPrototypes) { - if (!tp->isValid()) { - tp->setValid(true); - dtp = tp; - break; - } - } - - if (dtp == 0) - dtp = new QQuickTouchPoint(false); - dtp->setPointId(p->id()); - updateTouchPoint(dtp,p); - _touchPoints.insert(p->id(),dtp); - //we may have just obtained enough points to start tracking them -- in that case moved or stationary count as newly pressed - if (p->state() & Qt::TouchPointPressed || p->state() & Qt::TouchPointMoved || p->state() & Qt::TouchPointStationary) - _pressedTouchPoints.append(dtp); -} - -void QQuickMultiPointTouchArea::addTouchPrototype(QQuickTouchPoint *prototype) -{ - int id = _touchPrototypes.count(); - prototype->setPointId(id); - _touchPrototypes.insert(id, prototype); -} - -void QQuickMultiPointTouchArea::updateTouchPoint(QQuickTouchPoint *dtp, const QTouchEvent::TouchPoint *p) -{ - //TODO: if !qmlDefined, could bypass setters. - // also, should only emit signals after all values have been set - dtp->setX(p->pos().x()); - dtp->setY(p->pos().y()); - dtp->setPressure(p->pressure()); - dtp->setArea(p->rect()); - dtp->setStartX(p->startPos().x()); - dtp->setStartY(p->startPos().y()); - dtp->setPreviousX(p->lastPos().x()); - dtp->setPreviousY(p->lastPos().y()); - dtp->setSceneX(p->scenePos().x()); - dtp->setSceneY(p->scenePos().y()); -} - -void QQuickMultiPointTouchArea::mousePressEvent(QMouseEvent *event) -{ - if (!isEnabled()) { - QQuickItem::mousePressEvent(event); - return; - } - - _stealMouse = false; - setKeepMouseGrab(false); - event->setAccepted(true); -} - -void QQuickMultiPointTouchArea::mouseMoveEvent(QMouseEvent *event) -{ - if (!isEnabled()) { - QQuickItem::mouseMoveEvent(event); - return; - } - - //do nothing -} - -void QQuickMultiPointTouchArea::mouseReleaseEvent(QMouseEvent *event) -{ - _stealMouse = false; - if (!isEnabled()) { - QQuickItem::mouseReleaseEvent(event); - return; - } - QQuickCanvas *c = canvas(); - if (c && c->mouseGrabberItem() == this) - ungrabMouse(); - setKeepMouseGrab(false); -} - -void QQuickMultiPointTouchArea::ungrab() -{ - if (_touchPoints.count()) { - QQuickCanvas *c = canvas(); - if (c && c->mouseGrabberItem() == this) { - _stealMouse = false; - setKeepMouseGrab(false); - } - setKeepTouchGrab(false); - emit touchPointsCanceled(_touchPoints.values()); - clearTouchLists(); - foreach (QObject *obj, _touchPoints) { - QQuickTouchPoint *dtp = static_cast<QQuickTouchPoint*>(obj); - if (!dtp->isQmlDefined()) - delete dtp; - else - dtp->setValid(false); - } - _touchPoints.clear(); - } -} - -void QQuickMultiPointTouchArea::mouseUngrabEvent() -{ - ungrab(); -} - -void QQuickMultiPointTouchArea::touchUngrabEvent() -{ - ungrab(); -} - -bool QQuickMultiPointTouchArea::sendMouseEvent(QMouseEvent *event) -{ - QRectF myRect = mapRectToScene(QRectF(0, 0, width(), height())); - - QQuickCanvas *c = canvas(); - QQuickItem *grabber = c ? c->mouseGrabberItem() : 0; - bool stealThisEvent = _stealMouse; - if ((stealThisEvent || myRect.contains(event->windowPos())) && (!grabber || !grabber->keepMouseGrab())) { - QMouseEvent mouseEvent(event->type(), mapFromScene(event->windowPos()), event->windowPos(), event->screenPos(), - event->button(), event->buttons(), event->modifiers()); - mouseEvent.setAccepted(false); - - switch (mouseEvent.type()) { - case QEvent::MouseMove: - mouseMoveEvent(&mouseEvent); - break; - case QEvent::MouseButtonPress: - mousePressEvent(&mouseEvent); - break; - case QEvent::MouseButtonRelease: - mouseReleaseEvent(&mouseEvent); - break; - default: - break; - } - grabber = c->mouseGrabberItem(); - if (grabber && stealThisEvent && !grabber->keepMouseGrab() && grabber != this) - grabMouse(); - - return stealThisEvent; - } - if (event->type() == QEvent::MouseButtonRelease) { - _stealMouse = false; - if (c && c->mouseGrabberItem() == this) - ungrabMouse(); - setKeepMouseGrab(false); - } - return false; -} - -bool QQuickMultiPointTouchArea::childMouseEventFilter(QQuickItem *i, QEvent *event) -{ - if (!isEnabled() || !isVisible()) - return QQuickItem::childMouseEventFilter(i, event); - switch (event->type()) { - case QEvent::MouseButtonPress: - case QEvent::MouseMove: - case QEvent::MouseButtonRelease: - return sendMouseEvent(static_cast<QMouseEvent *>(event)); - break; - case QEvent::TouchBegin: - case QEvent::TouchUpdate: - if (!shouldFilter(event)) - return false; - updateTouchData(event); - return _stealMouse; - case QEvent::TouchEnd: { - if (!shouldFilter(event)) - return false; - updateTouchData(event); - //TODO: verify this behavior - _stealMouse = false; - setKeepMouseGrab(false); - QQuickCanvas *c = canvas(); - if (c && c->mouseGrabberItem() == this) - ungrabMouse(); - setKeepTouchGrab(false); - ungrabTouchPoints(); - } - break; - default: - break; - } - return QQuickItem::childMouseEventFilter(i, event); -} - -bool QQuickMultiPointTouchArea::shouldFilter(QEvent *event) -{ - QQuickCanvas *c = canvas(); - QQuickItem *grabber = c ? c->mouseGrabberItem() : 0; - bool disabledItem = grabber && !grabber->isEnabled(); - bool stealThisEvent = _stealMouse; - bool contains = false; - if (!stealThisEvent) { - switch (event->type()) { - case QEvent::MouseButtonPress: - case QEvent::MouseMove: - case QEvent::MouseButtonRelease: { - QMouseEvent *me = static_cast<QMouseEvent*>(event); - QRectF myRect = mapRectToScene(QRectF(0, 0, width(), height())); - contains = myRect.contains(me->windowPos()); - } - break; - case QEvent::TouchBegin: - case QEvent::TouchUpdate: - case QEvent::TouchEnd: { - QTouchEvent *te = static_cast<QTouchEvent*>(event); - QRectF myRect = mapRectToScene(QRectF(0, 0, width(), height())); - foreach (const QTouchEvent::TouchPoint &point, te->touchPoints()) { - if (myRect.contains(point.scenePos())) { - contains = true; - break; - } - } - } - break; - default: - break; - } - } - if ((stealThisEvent || contains) && (!grabber || !grabber->keepMouseGrab() || disabledItem)) { - return true; - } - ungrab(); - return false; -} - -QT_END_NAMESPACE |