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diff --git a/src/gui/kernel/qstandardgestures.cpp b/src/gui/kernel/qstandardgestures.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 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"
+
+QT_BEGIN_NAMESPACE
+
+QPanGestureRecognizer::QPanGestureRecognizer()
+{
+}
+
+QGesture *QPanGestureRecognizer::create(QObject *target)
+{
+ if (target && target->isWidgetType()) {
+#if defined(Q_OS_WIN)
+ // 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) {
+ 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;
+
+ if (d->isNewSequence) {
+ d->startPosition[0] = p1.screenPos();
+ d->startPosition[1] = p2.screenPos();
+ }
+ QLineF line(p1.screenPos(), p2.screenPos());
+ QLineF tmp(line);
+ tmp.setLength(line.length() / 2.);
+ QPointF centerPoint = tmp.p2();
+
+ d->lastCenterPoint = d->centerPoint;
+ d->centerPoint = centerPoint;
+ d->changeFlags |= QPinchGesture::CenterPointChanged;
+
+ const qreal scaleFactor = QLineF(p1.pos(), p2.pos()).length()
+ / QLineF(d->startPosition[0], d->startPosition[1]).length();
+ if (d->isNewSequence) {
+ d->lastScaleFactor = scaleFactor;
+ } else {
+ d->lastScaleFactor = d->scaleFactor;
+ }
+ d->scaleFactor = scaleFactor;
+ d->totalScaleFactor += d->scaleFactor - d->lastScaleFactor;
+ d->changeFlags |= QPinchGesture::ScaleFactorChanged;
+
+ const qreal rotationAngle = -line.angle();
+ if (d->isNewSequence)
+ d->lastRotationAngle = rotationAngle;
+ 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;
+ 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 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 = 0;
+ d->totalRotationAngle = d->lastRotationAngle = d->rotationAngle = 0;
+
+ d->isNewSequence = true;
+
+ QGestureRecognizer::reset(state);
+}
+
+QT_END_NAMESPACE
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