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+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "qmacgesturerecognizer_mac_p.h"
+#include "qgesture.h"
+#include "qgesture_p.h"
+#include "qevent.h"
+#include "qevent_p.h"
+#include "qwidget.h"
+#include "qdebug.h"
+
+#ifndef QT_NO_GESTURES
+
+QT_BEGIN_NAMESPACE
+
+QMacSwipeGestureRecognizer::QMacSwipeGestureRecognizer()
+{
+}
+
+QGesture *QMacSwipeGestureRecognizer::create(QObject * /*target*/)
+{
+    return new QSwipeGesture;
+}
+
+QGestureRecognizer::Result
+QMacSwipeGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
+{
+    if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
+        QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
+        switch (ev->gestureType) {
+            case QNativeGestureEvent::Swipe: {
+                QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
+                g->setSwipeAngle(ev->angle);
+                g->setHotSpot(ev->position);
+                return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
+                break; }
+            default:
+                break;
+        }
+    }
+
+    return QGestureRecognizer::Ignore;
+}
+
+void QMacSwipeGestureRecognizer::reset(QGesture *gesture)
+{
+    QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
+    g->setSwipeAngle(0);
+    QGestureRecognizer::reset(gesture);
+}
+
+////////////////////////////////////////////////////////////////////////
+
+QMacPinchGestureRecognizer::QMacPinchGestureRecognizer()
+{
+}
+
+QGesture *QMacPinchGestureRecognizer::create(QObject * /*target*/)
+{
+    return new QPinchGesture;
+}
+
+QGestureRecognizer::Result
+QMacPinchGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
+{
+    if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
+        QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
+        QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
+        switch(ev->gestureType) {
+        case QNativeGestureEvent::GestureBegin:
+            reset(gesture);
+            g->setStartCenterPoint(static_cast<QWidget*>(obj)->mapFromGlobal(ev->position));
+            g->setCenterPoint(g->startCenterPoint());
+            g->setChangeFlags(QPinchGesture::CenterPointChanged);
+            g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
+            g->setHotSpot(ev->position);
+            return QGestureRecognizer::MayBeGesture | QGestureRecognizer::ConsumeEventHint;
+        case QNativeGestureEvent::Rotate: {
+            g->setLastScaleFactor(g->scaleFactor());
+            g->setLastRotationAngle(g->rotationAngle());
+            g->setRotationAngle(g->rotationAngle() + ev->percentage);
+            g->setChangeFlags(QPinchGesture::RotationAngleChanged);
+            g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
+            g->setHotSpot(ev->position);
+            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
+        }
+        case QNativeGestureEvent::Zoom:
+            g->setLastScaleFactor(g->scaleFactor());
+            g->setLastRotationAngle(g->rotationAngle());
+            g->setScaleFactor(g->scaleFactor() * (1 + ev->percentage));
+            g->setChangeFlags(QPinchGesture::ScaleFactorChanged);
+            g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
+            g->setHotSpot(ev->position);
+            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
+        case QNativeGestureEvent::GestureEnd:
+            return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
+        default:
+            break;
+        }
+    }
+
+    return QGestureRecognizer::Ignore;
+}
+
+void QMacPinchGestureRecognizer::reset(QGesture *gesture)
+{
+    QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
+    g->setChangeFlags(0);
+    g->setTotalChangeFlags(0);
+    g->setScaleFactor(1.0f);
+    g->setTotalScaleFactor(1.0f);
+    g->setLastScaleFactor(1.0f);
+    g->setRotationAngle(0.0f);
+    g->setTotalRotationAngle(0.0f);
+    g->setLastRotationAngle(0.0f);
+    g->setCenterPoint(QPointF());
+    g->setStartCenterPoint(QPointF());
+    g->setLastCenterPoint(QPointF());
+    QGestureRecognizer::reset(gesture);
+}
+
+////////////////////////////////////////////////////////////////////////
+
+#if defined(QT_MAC_USE_COCOA)
+
+QMacPanGestureRecognizer::QMacPanGestureRecognizer() : _panCanceled(true)
+{
+}
+
+QGesture *QMacPanGestureRecognizer::create(QObject *target)
+{
+    if (!target)
+        return new QPanGesture;
+
+    if (QWidget *w = qobject_cast<QWidget *>(target)) {
+        w->setAttribute(Qt::WA_AcceptTouchEvents);
+        w->setAttribute(Qt::WA_TouchPadAcceptSingleTouchEvents);
+        return new QPanGesture;
+    }
+    return 0;
+}
+
+QGestureRecognizer::Result
+QMacPanGestureRecognizer::recognize(QGesture *gesture, QObject *target, QEvent *event)
+{
+    const int panBeginDelay = 300;
+    const int panBeginRadius = 3;
+
+    QPanGesture *g = static_cast<QPanGesture *>(gesture);
+
+    switch (event->type()) {
+    case QEvent::TouchBegin: {
+        const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
+        if (ev->touchPoints().size() == 1) {
+            reset(gesture);
+            _startPos = QCursor::pos();
+            _panTimer.start(panBeginDelay, target);
+            _panCanceled = false;
+            return QGestureRecognizer::MayBeGesture;
+        }
+        break;}
+    case QEvent::TouchEnd: {
+        if (_panCanceled)
+            break;
+
+        const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
+        if (ev->touchPoints().size() == 1)
+            return QGestureRecognizer::FinishGesture;
+        break;}
+    case QEvent::TouchUpdate: {
+        if (_panCanceled)
+            break;
+
+        const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
+        if (ev->touchPoints().size() == 1) {
+            if (_panTimer.isActive()) {
+                // INVARIANT: Still in maybeGesture. Check if the user
+                // moved his finger so much that it makes sense to cancel the pan:
+                const QPointF p = QCursor::pos();
+                if ((p - _startPos).manhattanLength() > panBeginRadius) {
+                    _panCanceled = true;
+                    _panTimer.stop();
+                    return QGestureRecognizer::CancelGesture;
+                }
+            } else {
+                const QPointF p = QCursor::pos();
+                const QPointF posOffset = p - _startPos;
+                g->setLastOffset(g->offset());
+                g->setOffset(QPointF(posOffset.x(), posOffset.y()));
+                g->setHotSpot(_startPos);
+                return QGestureRecognizer::TriggerGesture;
+            }
+        } else if (_panTimer.isActive()) {
+            // I only want to cancel the pan if the user is pressing
+            // more than one finger, and the pan hasn't started yet:
+            _panCanceled = true;
+            _panTimer.stop();
+            return QGestureRecognizer::CancelGesture;
+        }
+        break;}
+    case QEvent::Timer: {
+        QTimerEvent *ev = static_cast<QTimerEvent *>(event);
+        if (ev->timerId() == _panTimer.timerId()) {
+            _panTimer.stop();
+            if (_panCanceled)
+                break;
+            // Begin new pan session!
+            _startPos = QCursor::pos();
+            g->setHotSpot(_startPos);
+            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
+        }
+        break; }
+    default:
+        break;
+    }
+
+    return QGestureRecognizer::Ignore;
+}
+
+void QMacPanGestureRecognizer::reset(QGesture *gesture)
+{
+    QPanGesture *g = static_cast<QPanGesture *>(gesture);
+    _startPos = QPointF();
+    _panCanceled = true;
+    g->setOffset(QPointF(0, 0));
+    g->setLastOffset(QPointF(0, 0));
+    g->setAcceleration(qreal(1));
+    QGestureRecognizer::reset(gesture);
+}
+#endif // QT_MAC_USE_COCOA
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_GESTURES