/****************************************************************************

**

** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the test suite of the Qt Toolkit.

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** General Public License version 2.1 requirements will be met:

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** rights. These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

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** 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

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** $QT_END_LICENSE$

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****************************************************************************/

#include <QtTest/QtTest>

#include <QtTest/qtesttouch.h>

#include "../../shared/util.h"

#include <qevent.h>

#include <qwidget.h>

#include <qlayout.h>

#include <qgesture.h>

#include <qgesturerecognizer.h>

#include <qgraphicsitem.h>

#include <qgraphicswidget.h>

#include <qgraphicsview.h>

#include <qmainwindow.h>

#include <qdebug.h>

//TESTED_CLASS=

//TESTED_FILES=

static QPointF mapToGlobal(const QPointF &pt, QGraphicsItem *item, QGraphicsView *view)

{

    return view->viewport()->mapToGlobal(view->mapFromScene(item->mapToScene(pt)));

}

class CustomGesture : public QGesture

{

    Q_OBJECT

public:

    static Qt::GestureType GestureType;

    CustomGesture(QObject *parent = 0)

        : QGesture(parent), serial(0)

    {

    }

    int serial;

    static const int SerialMaybeThreshold;

    static const int SerialStartedThreshold;

    static const int SerialFinishedThreshold;

};

Qt::GestureType CustomGesture::GestureType = Qt::CustomGesture;

const int CustomGesture::SerialMaybeThreshold = 1;

const int CustomGesture::SerialStartedThreshold = 3;

const int CustomGesture::SerialFinishedThreshold = 6;

class CustomEvent : public QEvent

{

public:

    static int EventType;

    CustomEvent(int serial_ = 0)

        : QEvent(QEvent::Type(CustomEvent::EventType)),

          serial(serial_), hasHotSpot(false)

    {

    }

    int serial;

    QPointF hotSpot;

    bool hasHotSpot;

};

int CustomEvent::EventType = 0;

class CustomGestureRecognizer : public QGestureRecognizer

{

public:

    static bool ConsumeEvents;

    CustomGestureRecognizer()

    {

        if (!CustomEvent::EventType)

            CustomEvent::EventType = QEvent::registerEventType();

    }

    QGesture* create(QObject *)

    {

        return new CustomGesture;

    }

    QGestureRecognizer::Result recognize(QGesture *state, QObject*, QEvent *event)

    {

        if (event->type() == CustomEvent::EventType) {

            QGestureRecognizer::Result result = 0;

            if (CustomGestureRecognizer::ConsumeEvents)

                result |= QGestureRecognizer::ConsumeEventHint;

            CustomGesture *g = static_cast<CustomGesture*>(state);

            CustomEvent *e = static_cast<CustomEvent*>(event);

            g->serial = e->serial;

            if (e->hasHotSpot)

                g->setHotSpot(e->hotSpot);

            if (g->serial >= CustomGesture::SerialFinishedThreshold)

                result |= QGestureRecognizer::FinishGesture;

            else if (g->serial >= CustomGesture::SerialStartedThreshold)

                result |= QGestureRecognizer::TriggerGesture;

            else if (g->serial >= CustomGesture::SerialMaybeThreshold)

                result |= QGestureRecognizer::MayBeGesture;

            else

                result = QGestureRecognizer::CancelGesture;

            return result;

        }

        return QGestureRecognizer::Ignore;

    }

    void reset(QGesture *state)

    {

        CustomGesture *g = static_cast<CustomGesture *>(state);

        g->serial = 0;

        QGestureRecognizer::reset(state);

    }

};

bool CustomGestureRecognizer::ConsumeEvents = false;

// same as CustomGestureRecognizer but triggers early without the maybe state

class CustomContinuousGestureRecognizer : public QGestureRecognizer

{

public:

    CustomContinuousGestureRecognizer()

    {

        if (!CustomEvent::EventType)

            CustomEvent::EventType = QEvent::registerEventType();

    }

    QGesture* create(QObject *)

    {

        return new CustomGesture;

    }

    QGestureRecognizer::Result recognize(QGesture *state, QObject*, QEvent *event)

    {

        if (event->type() == CustomEvent::EventType) {

            QGestureRecognizer::Result result = QGestureRecognizer::ConsumeEventHint;

            CustomGesture *g = static_cast<CustomGesture *>(state);

            CustomEvent *e = static_cast<CustomEvent *>(event);

            g->serial = e->serial;

            if (e->hasHotSpot)

                g->setHotSpot(e->hotSpot);

            if (g->serial >= CustomGesture::SerialFinishedThreshold)

                result |= QGestureRecognizer::FinishGesture;

            else if (g->serial >= CustomGesture::SerialMaybeThreshold)

                result |= QGestureRecognizer::TriggerGesture;

            else

                result = QGestureRecognizer::CancelGesture;

            return result;

        }

        return QGestureRecognizer::Ignore;

    }

    void reset(QGesture *state)

    {

        CustomGesture *g = static_cast<CustomGesture *>(state);

        g->serial = 0;

        QGestureRecognizer::reset(state);

    }

};

class GestureWidget : public QWidget

{

    Q_OBJECT

public:

    GestureWidget(const char *name = 0, QWidget *parent = 0)

        : QWidget(parent)

    {

        if (name)

            setObjectName(QLatin1String(name));

        reset();

        acceptGestureOverride = false;

    }

    void reset()

    {

        customEventsReceived = 0;

        gestureEventsReceived = 0;

        gestureOverrideEventsReceived = 0;

        events.clear();

        overrideEvents.clear();

        ignoredGestures.clear();

    }

    int customEventsReceived;

    int gestureEventsReceived;

    int gestureOverrideEventsReceived;

    struct Events

    {

        QList<Qt::GestureType> all;

        QList<Qt::GestureType> started;

        QList<Qt::GestureType> updated;

        QList<Qt::GestureType> finished;

        QList<Qt::GestureType> canceled;

        void clear()

        {

            all.clear();

            started.clear();

            updated.clear();

            finished.clear();

            canceled.clear();

        }

    } events, overrideEvents;

    bool acceptGestureOverride;

    QSet<Qt::GestureType> ignoredGestures;

protected:

    bool event(QEvent *event)

    {

        Events *eventsPtr = 0;

        if (event->type() == QEvent::Gesture) {

            QGestureEvent *e = static_cast<QGestureEvent*>(event);

            ++gestureEventsReceived;

            eventsPtr = &events;

            foreach(Qt::GestureType type, ignoredGestures)

                e->ignore(e->gesture(type));

        } else if (event->type() == QEvent::GestureOverride) {

            ++gestureOverrideEventsReceived;

            eventsPtr = &overrideEvents;

            if (acceptGestureOverride)

                event->accept();

        }

        if (eventsPtr) {

            QGestureEvent *e = static_cast<QGestureEvent*>(event);

            QList<QGesture*> gestures = e->gestures();

            foreach(QGesture *g, gestures) {

                eventsPtr->all << g->gestureType();

                switch(g->state()) {

                case Qt::GestureStarted:

                    emit gestureStarted(e->type(), g);

                    eventsPtr->started << g->gestureType();

                    break;

                case Qt::GestureUpdated:

                    emit gestureUpdated(e->type(), g);

                    eventsPtr->updated << g->gestureType();

                    break;

                case Qt::GestureFinished:

                    emit gestureFinished(e->type(), g);

                    eventsPtr->finished << g->gestureType();

                    break;

                case Qt::GestureCanceled:

                    emit gestureCanceled(e->type(), g);

                    eventsPtr->canceled << g->gestureType();

                    break;

                default:

                    qWarning() << "Unknown GestureState enum value:" << static_cast<int>(g->state());

                }

            }

        } else if (event->type() == CustomEvent::EventType) {

            ++customEventsReceived;

        } else {

            return QWidget::event(event);

        }

        return true;

    }

Q_SIGNALS:

    void gestureStarted(QEvent::Type, QGesture *);

    void gestureUpdated(QEvent::Type, QGesture *);

    void gestureFinished(QEvent::Type, QGesture *);

    void gestureCanceled(QEvent::Type, QGesture *);

public Q_SLOTS:

    void deleteThis() { delete this; }

};

// TODO rename to sendGestureSequence

static void sendCustomGesture(CustomEvent *event, QObject *object, QGraphicsScene *scene = 0)

{

    QWeakPointer<QObject> receiver(object);

    for (int i = CustomGesture::SerialMaybeThreshold;

         i <= CustomGesture::SerialFinishedThreshold && receiver; ++i) {

        event->serial = i;

        if (scene)

            scene->sendEvent(qobject_cast<QGraphicsObject *>(object), event);

        else

            QApplication::sendEvent(object, event);

    }

}

class tst_Gestures : public QObject

{

Q_OBJECT

public:

    tst_Gestures();

    virtual ~tst_Gestures();

public slots:

    void initTestCase();

    void cleanupTestCase();

    void init();

    void cleanup();

private slots:

    void customGesture();

    void autoCancelingGestures();

    void gestureOverChild();

    void multipleWidgetOnlyGestureInTree();

    void conflictingGestures();

    void conflictingGesturesInGraphicsView();

    void finishedWithoutStarted();

    void unknownGesture();

    void graphicsItemGesture();

    void graphicsView();

    void graphicsItemTreeGesture();

    void explicitGraphicsObjectTarget();

    void gestureOverChildGraphicsItem();

    void twoGesturesOnDifferentLevel();

    void multipleGesturesInTree();

    void multipleGesturesInComplexTree();

    void testMapToScene();

    void ungrabGesture();

    void consumeEventHint();

    void unregisterRecognizer();

    void autoCancelGestures();

    void autoCancelGestures2();

    void graphicsViewParentPropagation();

    void panelPropagation();

    void panelStacksBehindParent();

    void deleteGestureTargetWidget();

    void deleteGestureTargetItem_data();

    void deleteGestureTargetItem();

    void viewportCoordinates();

    void partialGesturePropagation();

    void testQGestureRecognizerCleanup();

    void testReuseCanceledGestures();

    void bug_13501_gesture_not_accepted();

};

tst_Gestures::tst_Gestures()

{

}

tst_Gestures::~tst_Gestures()

{

}

void tst_Gestures::initTestCase()

{

    CustomGesture::GestureType = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    QVERIFY(CustomGesture::GestureType != Qt::GestureType(0));

    QVERIFY(CustomGesture::GestureType != Qt::CustomGesture);

}

void tst_Gestures::cleanupTestCase()

{

    QGestureRecognizer::unregisterRecognizer(CustomGesture::GestureType);

}

void tst_Gestures::init()

{

}

void tst_Gestures::cleanup()

{

}

void tst_Gestures::customGesture()

{

    GestureWidget widget;

    widget.grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    widget.show();

    QTest::qWaitForWindowShown(&widget);

    CustomEvent event;

    event.hotSpot = widget.mapToGlobal(QPoint(5,5));

    event.hasHotSpot = true;

    sendCustomGesture(&event, &widget);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    static const int TotalCustomEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialMaybeThreshold + 1;

    QCOMPARE(widget.customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(widget.gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(widget.gestureOverrideEventsReceived, 0);

    QCOMPARE(widget.events.all.size(), TotalGestureEventsCount);

    for(int i = 0; i < widget.events.all.size(); ++i)

        QCOMPARE(widget.events.all.at(i), CustomGesture::GestureType);

    QCOMPARE(widget.events.started.size(), 1);

    QCOMPARE(widget.events.updated.size(), TotalGestureEventsCount - 2);

    QCOMPARE(widget.events.finished.size(), 1);

    QCOMPARE(widget.events.canceled.size(), 0);

}

void tst_Gestures::consumeEventHint()

{

    GestureWidget widget;

    widget.grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    CustomGestureRecognizer::ConsumeEvents = true;

    CustomEvent event;

    sendCustomGesture(&event, &widget);

    CustomGestureRecognizer::ConsumeEvents = false;

    QCOMPARE(widget.customEventsReceived, 0);

}

void tst_Gestures::autoCancelingGestures()

{

    GestureWidget widget;

    widget.grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    // send partial gesture. The gesture will be in the "maybe" state, but will

    // never get enough events to fire, so Qt will have to kill it.

    CustomEvent ev;

    for (int i = CustomGesture::SerialMaybeThreshold;

         i < CustomGesture::SerialStartedThreshold; ++i) {

        ev.serial = i;

        QApplication::sendEvent(&widget, &ev);

    }

    // wait long enough so the gesture manager will cancel the gesture

    QTest::qWait(5000);

    QCOMPARE(widget.customEventsReceived, CustomGesture::SerialStartedThreshold - CustomGesture::SerialMaybeThreshold);

    QCOMPARE(widget.gestureEventsReceived, 0);

    QCOMPARE(widget.gestureOverrideEventsReceived, 0);

    QCOMPARE(widget.events.all.size(), 0);

}

void tst_Gestures::gestureOverChild()

{

    GestureWidget widget("widget");

    QVBoxLayout *l = new QVBoxLayout(&widget);

    GestureWidget *child = new GestureWidget("child");

    l->addWidget(child);

    widget.grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    CustomEvent event;

    sendCustomGesture(&event, child);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    static const int TotalCustomEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialMaybeThreshold + 1;

    QCOMPARE(child->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(widget.customEventsReceived, 0);

    QCOMPARE(child->gestureEventsReceived, 0);

    QCOMPARE(child->gestureOverrideEventsReceived, 0);

    QCOMPARE(widget.gestureEventsReceived, 0);

    QCOMPARE(widget.gestureOverrideEventsReceived, 0);

    // enable gestures over the children

    widget.grabGesture(CustomGesture::GestureType);

    widget.reset();

    child->reset();

    sendCustomGesture(&event, child);

    QCOMPARE(child->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(widget.customEventsReceived, 0);

    QCOMPARE(child->gestureEventsReceived, 0);

    QCOMPARE(child->gestureOverrideEventsReceived, 0);

    QCOMPARE(widget.gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(widget.gestureOverrideEventsReceived, 0);

    for(int i = 0; i < widget.events.all.size(); ++i)

        QCOMPARE(widget.events.all.at(i), CustomGesture::GestureType);

    QCOMPARE(widget.events.started.size(), 1);

    QCOMPARE(widget.events.updated.size(), TotalGestureEventsCount - 2);

    QCOMPARE(widget.events.finished.size(), 1);

    QCOMPARE(widget.events.canceled.size(), 0);

}

void tst_Gestures::multipleWidgetOnlyGestureInTree()

{

    GestureWidget parent("parent");

    QVBoxLayout *l = new QVBoxLayout(&parent);

    GestureWidget *child = new GestureWidget("child");

    l->addWidget(child);

    parent.grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    child->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    static const int TotalCustomEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialMaybeThreshold + 1;

    // sending events to the child and making sure there is no conflict

    CustomEvent event;

    sendCustomGesture(&event, child);

    QCOMPARE(child->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(parent.customEventsReceived, 0);

    QCOMPARE(child->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(child->gestureOverrideEventsReceived, 0);

    QCOMPARE(parent.gestureEventsReceived, 0);

    QCOMPARE(parent.gestureOverrideEventsReceived, 0);

    parent.reset();

    child->reset();

    // same for the parent widget

    sendCustomGesture(&event, &parent);

    QCOMPARE(child->customEventsReceived, 0);

    QCOMPARE(parent.customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(child->gestureEventsReceived, 0);

    QCOMPARE(child->gestureOverrideEventsReceived, 0);

    QCOMPARE(parent.gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(parent.gestureOverrideEventsReceived, 0);

}

void tst_Gestures::conflictingGestures()

{

    GestureWidget parent("parent");

    QVBoxLayout *l = new QVBoxLayout(&parent);

    GestureWidget *child = new GestureWidget("child");

    l->addWidget(child);

    parent.grabGesture(CustomGesture::GestureType);

    child->grabGesture(CustomGesture::GestureType);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    // child accepts the override, parent will not receive anything

    parent.acceptGestureOverride = false;

    child->acceptGestureOverride = true;

    // sending events to the child and making sure there is no conflict

    CustomEvent event;

    sendCustomGesture(&event, child);

    QCOMPARE(child->gestureOverrideEventsReceived, 1);

    QCOMPARE(child->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(parent.gestureOverrideEventsReceived, 0);

    QCOMPARE(parent.gestureEventsReceived, 0);

    parent.reset();

    child->reset();

    // parent accepts the override

    parent.acceptGestureOverride = true;

    child->acceptGestureOverride = false;

    // sending events to the child and making sure there is no conflict

    sendCustomGesture(&event, child);

    QCOMPARE(child->gestureOverrideEventsReceived, 1);

    QCOMPARE(child->gestureEventsReceived, 0);

    QCOMPARE(parent.gestureOverrideEventsReceived, 1);

    QCOMPARE(parent.gestureEventsReceived, TotalGestureEventsCount);

    parent.reset();

    child->reset();

    // nobody accepts the override, we will send normal events to the closest

    // context (i.e. to the child widget) and it will be propagated and

    // accepted by the parent widget

    parent.acceptGestureOverride = false;

    child->acceptGestureOverride = false;

    child->ignoredGestures << CustomGesture::GestureType;

    // sending events to the child and making sure there is no conflict

    sendCustomGesture(&event, child);

    QCOMPARE(child->gestureOverrideEventsReceived, 1);

    QCOMPARE(child->gestureEventsReceived, 1);

    QCOMPARE(parent.gestureOverrideEventsReceived, 1);

    QCOMPARE(parent.gestureEventsReceived, TotalGestureEventsCount);

    parent.reset();

    child->reset();

    // nobody accepts the override, and nobody accepts the gesture event

    parent.acceptGestureOverride = false;

    child->acceptGestureOverride = false;

    parent.ignoredGestures << CustomGesture::GestureType;

    child->ignoredGestures << CustomGesture::GestureType;

    // sending events to the child and making sure there is no conflict

    sendCustomGesture(&event, child);

    QCOMPARE(child->gestureOverrideEventsReceived, 1);

    QCOMPARE(child->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(parent.gestureOverrideEventsReceived, 1);

    QCOMPARE(parent.gestureEventsReceived, 1);

    parent.reset();

    child->reset();

    // we set an attribute to make sure all gesture events are propagated

    parent.grabGesture(CustomGesture::GestureType, Qt::ReceivePartialGestures);

    parent.acceptGestureOverride = false;

    child->acceptGestureOverride = false;

    parent.ignoredGestures << CustomGesture::GestureType;

    child->ignoredGestures << CustomGesture::GestureType;

    // sending events to the child and making sure there is no conflict

    sendCustomGesture(&event, child);

    QCOMPARE(child->gestureOverrideEventsReceived, 1);

    QCOMPARE(child->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(parent.gestureOverrideEventsReceived, 1);

    QCOMPARE(parent.gestureEventsReceived, TotalGestureEventsCount);

    parent.reset();

    child->reset();

    Qt::GestureType ContinuousGesture = QGestureRecognizer::registerRecognizer(new CustomContinuousGestureRecognizer);

    static const int ContinuousGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialMaybeThreshold + 1;

    child->grabGesture(ContinuousGesture);

    // child accepts override. And it also receives another custom gesture.

    parent.acceptGestureOverride = false;

    child->acceptGestureOverride = true;

    sendCustomGesture(&event, child);

    QCOMPARE(child->gestureOverrideEventsReceived, 1);

    QVERIFY(child->gestureEventsReceived > TotalGestureEventsCount);

    QCOMPARE(child->events.all.count(), TotalGestureEventsCount + ContinuousGestureEventsCount);

    QCOMPARE(parent.gestureOverrideEventsReceived, 0);

    QCOMPARE(parent.gestureEventsReceived, 0);

    QGestureRecognizer::unregisterRecognizer(ContinuousGesture);

}

void tst_Gestures::finishedWithoutStarted()

{

    GestureWidget widget;

    widget.grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    // the gesture will claim it finished, but it was never started.

    CustomEvent ev;

    ev.serial = CustomGesture::SerialFinishedThreshold;

    QApplication::sendEvent(&widget, &ev);

    QCOMPARE(widget.customEventsReceived, 1);

    QCOMPARE(widget.gestureEventsReceived, 2);

    QCOMPARE(widget.gestureOverrideEventsReceived, 0);

    QCOMPARE(widget.events.all.size(), 2);

    QCOMPARE(widget.events.started.size(), 1);

    QCOMPARE(widget.events.updated.size(), 0);

    QCOMPARE(widget.events.finished.size(), 1);

    QCOMPARE(widget.events.canceled.size(), 0);

}

void tst_Gestures::unknownGesture()

{

    GestureWidget widget;

    widget.grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    widget.grabGesture(Qt::CustomGesture, Qt::DontStartGestureOnChildren);

    widget.grabGesture(Qt::GestureType(Qt::PanGesture+512), Qt::DontStartGestureOnChildren);

    CustomEvent event;

    sendCustomGesture(&event, &widget);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    QCOMPARE(widget.gestureEventsReceived, TotalGestureEventsCount);

}

static const QColor InstanceColors[] = {

    Qt::blue, Qt::red, Qt::green, Qt::gray, Qt::yellow

};

class GestureItem : public QGraphicsObject

{

    Q_OBJECT

    static int InstanceCount;

public:

    GestureItem(const char *name = 0)

    {

        instanceNumber = InstanceCount++;

        if (name) {

            setObjectName(QLatin1String(name));

            setToolTip(name);

        }

        size = QRectF(0, 0, 100, 100);

        customEventsReceived = 0;

        gestureEventsReceived = 0;

        gestureOverrideEventsReceived = 0;

        events.clear();

        overrideEvents.clear();

        acceptGestureOverride = false;

        scene = 0;

    }

    ~GestureItem()

    {

        --InstanceCount;

    }

    int customEventsReceived;

    int gestureEventsReceived;

    int gestureOverrideEventsReceived;

    struct Events

    {

        QList<Qt::GestureType> all;

        QList<Qt::GestureType> started;

        QList<Qt::GestureType> updated;

        QList<Qt::GestureType> finished;

        QList<Qt::GestureType> canceled;

        void clear()

        {

            all.clear();

            started.clear();

            updated.clear();

            finished.clear();

            canceled.clear();

        }

    } events, overrideEvents;

    bool acceptGestureOverride;

    QSet<Qt::GestureType> ignoredGestures;

    QSet<Qt::GestureType> ignoredStartedGestures;

    QSet<Qt::GestureType> ignoredUpdatedGestures;

    QSet<Qt::GestureType> ignoredFinishedGestures;

    QRectF size;

    int instanceNumber;

    void reset()

    {

        customEventsReceived = 0;

        gestureEventsReceived = 0;

        gestureOverrideEventsReceived = 0;

        events.clear();

        overrideEvents.clear();

        ignoredGestures.clear();

        ignoredStartedGestures.clear();

        ignoredUpdatedGestures.clear();

        ignoredFinishedGestures.clear();

    }

    QRectF boundingRect() const

    {

        return size;

    }

    void paint(QPainter *p, const QStyleOptionGraphicsItem *, QWidget *)

    {

        QColor color = InstanceColors[instanceNumber % (sizeof(InstanceColors)/sizeof(InstanceColors[0]))];

        p->fillRect(boundingRect(), color);

    }

    bool event(QEvent *event)

    {

        Events *eventsPtr = 0;

        if (event->type() == QEvent::Gesture) {

            ++gestureEventsReceived;

            eventsPtr = &events;

            QGestureEvent *e = static_cast<QGestureEvent *>(event);

            foreach(Qt::GestureType type, ignoredGestures)

                e->ignore(e->gesture(type));

            foreach(QGesture *g, e->gestures()) {

                switch (g->state()) {

                case Qt::GestureStarted:

                    if (ignoredStartedGestures.contains(g->gestureType()))

                        e->ignore(g);

                    break;

                case Qt::GestureUpdated:

                    if (ignoredUpdatedGestures.contains(g->gestureType()))

                        e->ignore(g);

                    break;

                case Qt::GestureFinished:

                    if (ignoredFinishedGestures.contains(g->gestureType()))

                        e->ignore(g);

                    break;

                default:

                    break;

                }

            }

        } else if (event->type() == QEvent::GestureOverride) {

            ++gestureOverrideEventsReceived;

            eventsPtr = &overrideEvents;

            if (acceptGestureOverride)

                event->accept();

        }

        if (eventsPtr) {

            QGestureEvent *e = static_cast<QGestureEvent*>(event);

            QList<QGesture*> gestures = e->gestures();

            foreach(QGesture *g, gestures) {

                eventsPtr->all << g->gestureType();

                switch(g->state()) {

                case Qt::GestureStarted:

                    eventsPtr->started << g->gestureType();

                    emit gestureStarted(e->type(), g);

                    break;

                case Qt::GestureUpdated:

                    eventsPtr->updated << g->gestureType();

                    emit gestureUpdated(e->type(), g);

                    break;

                case Qt::GestureFinished:

                    eventsPtr->finished << g->gestureType();

                    emit gestureFinished(e->type(), g);

                    break;

                case Qt::GestureCanceled:

                    eventsPtr->canceled << g->gestureType();

                    emit gestureCanceled(e->type(), g);

                    break;

                default:

                    qWarning() << "Unknown GestureState enum value:" << static_cast<int>(g->state());

                }

            }

        } else if (event->type() == CustomEvent::EventType) {

            ++customEventsReceived;

        } else {

            return QGraphicsObject::event(event);

        }

        return true;

    }

Q_SIGNALS:

    void gestureStarted(QEvent::Type, QGesture *);

    void gestureUpdated(QEvent::Type, QGesture *);

    void gestureFinished(QEvent::Type, QGesture *);

    void gestureCanceled(QEvent::Type, QGesture *);

public:

    // some arguments for the slots below:

    QGraphicsScene *scene;

public Q_SLOTS:

    void deleteThis() { delete this; }

    void addSelfToScene(QEvent::Type eventType, QGesture *)

    {

        if (eventType == QEvent::Gesture) {

            disconnect(sender(), 0, this, SLOT(addSelfToScene(QEvent::Type,QGesture*)));

            scene->addItem(this);

        }

    }

};

int GestureItem::InstanceCount = 0;

void tst_Gestures::graphicsItemGesture()

{

    QGraphicsScene scene;

    QGraphicsView view(&scene);

    view.setWindowFlags(Qt::X11BypassWindowManagerHint);

    GestureItem *item = new GestureItem("item");

    scene.addItem(item);

    item->setPos(100, 100);

    view.show();

    QTest::qWaitForWindowShown(&view);

    view.ensureVisible(scene.sceneRect());

    item->grabGesture(CustomGesture::GestureType);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    static const int TotalCustomEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialMaybeThreshold + 1;

    CustomEvent event;

    // gesture without hotspot should not be delivered to items in the view

    QTest::ignoreMessage(QtWarningMsg, "QGestureManager::deliverEvent: could not find the target for gesture");

    QTest::ignoreMessage(QtWarningMsg, "QGestureManager::deliverEvent: could not find the target for gesture");

    QTest::ignoreMessage(QtWarningMsg, "QGestureManager::deliverEvent: could not find the target for gesture");

    QTest::ignoreMessage(QtWarningMsg, "QGestureManager::deliverEvent: could not find the target for gesture");

    sendCustomGesture(&event, item, &scene);

    QCOMPARE(item->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(item->gestureEventsReceived, 0);

    QCOMPARE(item->gestureOverrideEventsReceived, 0);

    item->reset();

    // make sure the event is properly delivered if only the hotspot is set.

    event.hotSpot = mapToGlobal(QPointF(10, 10), item, &view);

    event.hasHotSpot = true;

    sendCustomGesture(&event, item, &scene);

    QCOMPARE(item->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(item->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item->gestureOverrideEventsReceived, 0);

    QCOMPARE(item->events.all.size(), TotalGestureEventsCount);

    for(int i = 0; i < item->events.all.size(); ++i)

        QCOMPARE(item->events.all.at(i), CustomGesture::GestureType);

    QCOMPARE(item->events.started.size(), 1);

    QCOMPARE(item->events.updated.size(), TotalGestureEventsCount - 2);

    QCOMPARE(item->events.finished.size(), 1);

    QCOMPARE(item->events.canceled.size(), 0);

    item->reset();

    // send gesture to the item which ignores it.

    item->ignoredGestures << CustomGesture::GestureType;

    event.hotSpot = mapToGlobal(QPointF(10, 10), item, &view);

    event.hasHotSpot = true;

    sendCustomGesture(&event, item, &scene);

    QCOMPARE(item->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(item->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item->gestureOverrideEventsReceived, 0);

}

void tst_Gestures::graphicsView()

{

    QGraphicsScene scene;

    QGraphicsView view(&scene);

    view.setWindowFlags(Qt::X11BypassWindowManagerHint);

    GestureItem *item = new GestureItem("item");

    scene.addItem(item);

    item->setPos(100, 100);

    view.show();

    QTest::qWaitForWindowShown(&view);

    view.ensureVisible(scene.sceneRect());

    item->grabGesture(CustomGesture::GestureType);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    static const int TotalCustomEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialMaybeThreshold + 1;

    CustomEvent event;

    // make sure the event is properly delivered if only the hotspot is set.

    event.hotSpot = mapToGlobal(QPointF(10, 10), item, &view);

    event.hasHotSpot = true;

    sendCustomGesture(&event, item, &scene);

    QCOMPARE(item->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(item->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item->gestureOverrideEventsReceived, 0);

    // change the viewport and try again

    QWidget *newViewport = new QWidget;

    view.setViewport(newViewport);

    item->reset();

    sendCustomGesture(&event, item, &scene);

    QCOMPARE(item->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(item->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item->gestureOverrideEventsReceived, 0);

    // change the scene and try again

    QGraphicsScene newScene;

    item = new GestureItem("newItem");

    newScene.addItem(item);

    item->setPos(100, 100);

    view.setScene(&newScene);

    item->reset();

    // first without a gesture

    sendCustomGesture(&event, item, &newScene);

    QCOMPARE(item->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(item->gestureEventsReceived, 0);

    QCOMPARE(item->gestureOverrideEventsReceived, 0);

    // then grab the gesture and try again

    item->reset();

    item->grabGesture(CustomGesture::GestureType);

    sendCustomGesture(&event, item, &newScene);

    QCOMPARE(item->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(item->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item->gestureOverrideEventsReceived, 0);

}

void tst_Gestures::graphicsItemTreeGesture()

{

    QGraphicsScene scene;

    QGraphicsView view(&scene);

    view.setWindowFlags(Qt::X11BypassWindowManagerHint);

    GestureItem *item1 = new GestureItem("item1");

    item1->setPos(100, 100);

    item1->size = QRectF(0, 0, 350, 200);

    scene.addItem(item1);

    GestureItem *item1_child1 = new GestureItem("item1_child1");

    item1_child1->setPos(50, 50);

    item1_child1->size = QRectF(0, 0, 100, 100);

    item1_child1->setParentItem(item1);

    GestureItem *item1_child2 = new GestureItem("item1_child2");

    item1_child2->size = QRectF(0, 0, 100, 100);

    item1_child2->setPos(200, 50);

    item1_child2->setParentItem(item1);

    view.show();

    QTest::qWaitForWindowShown(&view);

    view.ensureVisible(scene.sceneRect());

    item1->grabGesture(CustomGesture::GestureType);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    CustomEvent event;

    event.hotSpot = mapToGlobal(QPointF(10, 10), item1_child1, &view);

    event.hasHotSpot = true;

    item1->ignoredGestures << CustomGesture::GestureType;

    sendCustomGesture(&event, item1_child1, &scene);

    QCOMPARE(item1_child1->gestureOverrideEventsReceived, 0);

    QCOMPARE(item1_child1->gestureEventsReceived, 0);

    QCOMPARE(item1_child2->gestureEventsReceived, 0);

    QCOMPARE(item1_child2->gestureOverrideEventsReceived, 0);

    QCOMPARE(item1->gestureOverrideEventsReceived, 0);

    QCOMPARE(item1->gestureEventsReceived, TotalGestureEventsCount);

    item1->reset(); item1_child1->reset(); item1_child2->reset();

    item1_child1->grabGesture(CustomGesture::GestureType);

    item1->ignoredGestures << CustomGesture::GestureType;

    item1_child1->ignoredGestures << CustomGesture::GestureType;

    sendCustomGesture(&event, item1_child1, &scene);

    QCOMPARE(item1_child1->gestureOverrideEventsReceived, 1);

    QCOMPARE(item1_child1->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item1_child2->gestureEventsReceived, 0);

    QCOMPARE(item1_child2->gestureOverrideEventsReceived, 0);

    QCOMPARE(item1->gestureOverrideEventsReceived, 1);

    QCOMPARE(item1->gestureEventsReceived, 1);

}

void tst_Gestures::explicitGraphicsObjectTarget()

{

    QGraphicsScene scene;

    QGraphicsView view(&scene);

    view.setWindowFlags(Qt::X11BypassWindowManagerHint);

    GestureItem *item1 = new GestureItem("item1");

    scene.addItem(item1);

    item1->setPos(100, 100);

    item1->setZValue(1);

    GestureItem *item2 = new GestureItem("item2");

    scene.addItem(item2);

    item2->setPos(100, 100);

    item2->setZValue(5);

    GestureItem *item2_child1 = new GestureItem("item2_child1");

    scene.addItem(item2_child1);

    item2_child1->setParentItem(item2);

    item2_child1->setPos(10, 10);

    view.show();

    QTest::qWaitForWindowShown(&view);

    view.ensureVisible(scene.sceneRect());

    item1->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    item2->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    item2_child1->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    // sending events to item1, but the hotSpot is set to item2

    CustomEvent event;

    event.hotSpot = mapToGlobal(QPointF(15, 15), item2, &view);

    event.hasHotSpot = true;

    sendCustomGesture(&event, item1, &scene);

    QCOMPARE(item1->gestureEventsReceived, 0);

    QCOMPARE(item1->gestureOverrideEventsReceived, 1);

    QCOMPARE(item2_child1->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item2_child1->gestureOverrideEventsReceived, 1);

    QCOMPARE(item2_child1->events.all.size(), TotalGestureEventsCount);

    for(int i = 0; i < item2_child1->events.all.size(); ++i)

        QCOMPARE(item2_child1->events.all.at(i), CustomGesture::GestureType);

    QCOMPARE(item2_child1->events.started.size(), 1);

    QCOMPARE(item2_child1->events.updated.size(), TotalGestureEventsCount - 2);

    QCOMPARE(item2_child1->events.finished.size(), 1);

    QCOMPARE(item2_child1->events.canceled.size(), 0);

    QCOMPARE(item2->gestureEventsReceived, 0);

    QCOMPARE(item2->gestureOverrideEventsReceived, 1);

}

void tst_Gestures::gestureOverChildGraphicsItem()

{

    QGraphicsScene scene;

    QGraphicsView view(&scene);

    view.setWindowFlags(Qt::X11BypassWindowManagerHint);

    GestureItem *item0 = new GestureItem("item0");

    scene.addItem(item0);

    item0->setPos(0, 0);

    item0->grabGesture(CustomGesture::GestureType);

    item0->setZValue(1);

    GestureItem *item1 = new GestureItem("item1");

    scene.addItem(item1);

    item1->setPos(100, 100);

    item1->setZValue(5);

    GestureItem *item2 = new GestureItem("item2");

    scene.addItem(item2);

    item2->setPos(100, 100);

    item2->setZValue(10);

    GestureItem *item2_child1 = new GestureItem("item2_child1");

    scene.addItem(item2_child1);

    item2_child1->setParentItem(item2);

    item2_child1->setPos(0, 0);

    view.show();

    QTest::qWaitForWindowShown(&view);

    view.ensureVisible(scene.sceneRect());

    item1->grabGesture(CustomGesture::GestureType);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    static const int TotalCustomEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialMaybeThreshold + 1;

    CustomEvent event;

    event.hotSpot = mapToGlobal(QPointF(10, 10), item2_child1, &view);

    event.hasHotSpot = true;

    sendCustomGesture(&event, item0, &scene);

    QCOMPARE(item0->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(item2_child1->gestureEventsReceived, 0);

    QCOMPARE(item2_child1->gestureOverrideEventsReceived, 0);

    QCOMPARE(item2->gestureEventsReceived, 0);

    QCOMPARE(item2->gestureOverrideEventsReceived, 0);

    QCOMPARE(item1->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item1->gestureOverrideEventsReceived, 0);

    item0->reset(); item1->reset(); item2->reset(); item2_child1->reset();

    item2->grabGesture(CustomGesture::GestureType);

    item2->ignoredGestures << CustomGesture::GestureType;

    event.hotSpot = mapToGlobal(QPointF(10, 10), item2_child1, &view);

    event.hasHotSpot = true;

    sendCustomGesture(&event, item0, &scene);

    QCOMPARE(item2_child1->gestureEventsReceived, 0);

    QCOMPARE(item2_child1->gestureOverrideEventsReceived, 0);

    QCOMPARE(item2->gestureEventsReceived, 1);

    QCOMPARE(item2->gestureOverrideEventsReceived, 1);

    QCOMPARE(item1->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item1->gestureOverrideEventsReceived, 1);

    item0->reset(); item1->reset(); item2->reset(); item2_child1->reset();

    item2->grabGesture(CustomGesture::GestureType);

    item2->ignoredGestures << CustomGesture::GestureType;

    item1->ignoredGestures << CustomGesture::GestureType;

    event.hotSpot = mapToGlobal(QPointF(10, 10), item2_child1, &view);

    event.hasHotSpot = true;

    sendCustomGesture(&event, item0, &scene);

    QCOMPARE(item2_child1->gestureEventsReceived, 0);

    QCOMPARE(item2_child1->gestureOverrideEventsReceived, 0);

    QCOMPARE(item2->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item2->gestureOverrideEventsReceived, 1);

    QCOMPARE(item1->gestureEventsReceived, 1);

    QCOMPARE(item1->gestureOverrideEventsReceived, 1);

    item0->reset(); item1->reset(); item2->reset(); item2_child1->reset();

    item2->grabGesture(CustomGesture::GestureType);

    item2->ignoredGestures << CustomGesture::GestureType;

    item1->ignoredGestures << CustomGesture::GestureType;

    item1->grabGesture(CustomGesture::GestureType, Qt::ReceivePartialGestures);

    event.hotSpot = mapToGlobal(QPointF(10, 10), item2_child1, &view);

    event.hasHotSpot = true;

    sendCustomGesture(&event, item0, &scene);

    QCOMPARE(item2_child1->gestureEventsReceived, 0);

    QCOMPARE(item2_child1->gestureOverrideEventsReceived, 0);

    QCOMPARE(item2->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item2->gestureOverrideEventsReceived, 1);

    QCOMPARE(item1->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(item1->gestureOverrideEventsReceived, 1);

}

void tst_Gestures::twoGesturesOnDifferentLevel()

{

    GestureWidget parent("parent");

    QVBoxLayout *l = new QVBoxLayout(&parent);

    GestureWidget *child = new GestureWidget("child");

    l->addWidget(child);

    Qt::GestureType SecondGesture = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    parent.grabGesture(CustomGesture::GestureType);

    child->grabGesture(SecondGesture);

    CustomEvent event;

    // sending events that form a gesture to one widget, but they will be

    // filtered by two different gesture recognizers and will generate two

    // QGesture objects. Check that those gesture objects are delivered to

    // different widgets properly.

    sendCustomGesture(&event, child);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    static const int TotalCustomEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialMaybeThreshold + 1;

    QCOMPARE(child->customEventsReceived, TotalCustomEventsCount);

    QCOMPARE(child->gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(child->gestureOverrideEventsReceived, 0);

    QCOMPARE(child->events.all.size(), TotalGestureEventsCount);

    for(int i = 0; i < child->events.all.size(); ++i)

        QCOMPARE(child->events.all.at(i), SecondGesture);

    QCOMPARE(parent.gestureEventsReceived, TotalGestureEventsCount);

    QCOMPARE(parent.gestureOverrideEventsReceived, 0);

    QCOMPARE(parent.events.all.size(), TotalGestureEventsCount);

    for(int i = 0; i < child->events.all.size(); ++i)

        QCOMPARE(parent.events.all.at(i), CustomGesture::GestureType);

    QGestureRecognizer::unregisterRecognizer(SecondGesture);

}

void tst_Gestures::multipleGesturesInTree()

{

    GestureWidget a("A");

    GestureWidget *A = &a;

    GestureWidget *B = new GestureWidget("B", A);

    GestureWidget *C = new GestureWidget("C", B);

    GestureWidget *D = new GestureWidget("D", C);

    Qt::GestureType FirstGesture  = CustomGesture::GestureType;

    Qt::GestureType SecondGesture = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    Qt::GestureType ThirdGesture  = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    Qt::GestureFlags flags = Qt::ReceivePartialGestures;

    A->grabGesture(FirstGesture,  flags);   // A [1   3]

    A->grabGesture(ThirdGesture,  flags);   // |

    B->grabGesture(SecondGesture, flags);   // B [  2 3]

    B->grabGesture(ThirdGesture,  flags);   // |

    C->grabGesture(FirstGesture,  flags);   // C [1 2 3]

    C->grabGesture(SecondGesture, flags);   // |

    C->grabGesture(ThirdGesture,  flags);   // D [1   3]

    D->grabGesture(FirstGesture,  flags);

    D->grabGesture(ThirdGesture,  flags);

    // make sure all widgets ignore events, so they get propagated.

    A->ignoredGestures << FirstGesture << ThirdGesture;

    B->ignoredGestures << SecondGesture << ThirdGesture;

    C->ignoredGestures << FirstGesture << SecondGesture << ThirdGesture;

    D->ignoredGestures << FirstGesture << ThirdGesture;

    CustomEvent event;

    sendCustomGesture(&event, D);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    // gesture override events

    QCOMPARE(D->overrideEvents.all.count(FirstGesture), 1);

    QCOMPARE(D->overrideEvents.all.count(SecondGesture), 0);

    QCOMPARE(D->overrideEvents.all.count(ThirdGesture), 1);

    QCOMPARE(C->overrideEvents.all.count(FirstGesture), 1);

    QCOMPARE(C->overrideEvents.all.count(SecondGesture), 1);

    QCOMPARE(C->overrideEvents.all.count(ThirdGesture), 1);

    QCOMPARE(B->overrideEvents.all.count(FirstGesture), 0);

    QCOMPARE(B->overrideEvents.all.count(SecondGesture), 1);

    QCOMPARE(B->overrideEvents.all.count(ThirdGesture), 1);

    QCOMPARE(A->overrideEvents.all.count(FirstGesture), 1);

    QCOMPARE(A->overrideEvents.all.count(SecondGesture), 0);

    QCOMPARE(A->overrideEvents.all.count(ThirdGesture), 1);

    // normal gesture events

    QCOMPARE(D->events.all.count(FirstGesture), TotalGestureEventsCount);

    QCOMPARE(D->events.all.count(SecondGesture), 0);

    QCOMPARE(D->events.all.count(ThirdGesture), TotalGestureEventsCount);

    QCOMPARE(C->events.all.count(FirstGesture), TotalGestureEventsCount);

    QCOMPARE(C->events.all.count(SecondGesture), TotalGestureEventsCount);

    QCOMPARE(C->events.all.count(ThirdGesture), TotalGestureEventsCount);

    QCOMPARE(B->events.all.count(FirstGesture), 0);

    QCOMPARE(B->events.all.count(SecondGesture), TotalGestureEventsCount);

    QCOMPARE(B->events.all.count(ThirdGesture), TotalGestureEventsCount);

    QCOMPARE(A->events.all.count(FirstGesture), TotalGestureEventsCount);

    QCOMPARE(A->events.all.count(SecondGesture), 0);

    QCOMPARE(A->events.all.count(ThirdGesture), TotalGestureEventsCount);

    QGestureRecognizer::unregisterRecognizer(SecondGesture);

    QGestureRecognizer::unregisterRecognizer(ThirdGesture);

}

void tst_Gestures::multipleGesturesInComplexTree()

{

    GestureWidget a("A");

    GestureWidget *A = &a;

    GestureWidget *B = new GestureWidget("B", A);

    GestureWidget *C = new GestureWidget("C", B);

    GestureWidget *D = new GestureWidget("D", C);

    Qt::GestureType FirstGesture   = CustomGesture::GestureType;

    Qt::GestureType SecondGesture  = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    Qt::GestureType ThirdGesture   = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    Qt::GestureType FourthGesture  = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    Qt::GestureType FifthGesture   = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    Qt::GestureType SixthGesture   = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    Qt::GestureType SeventhGesture = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    Qt::GestureFlags flags = Qt::ReceivePartialGestures;

    A->grabGesture(FirstGesture,   flags); // A [1,3,4]

    A->grabGesture(ThirdGesture,   flags); // |

    A->grabGesture(FourthGesture,  flags); // B [2,3,5]

    B->grabGesture(SecondGesture,  flags); // |

    B->grabGesture(ThirdGesture,   flags); // C [1,2,3,6]

    B->grabGesture(FifthGesture,   flags); // |

    C->grabGesture(FirstGesture,   flags); // D [1,3,7]

    C->grabGesture(SecondGesture,  flags);

    C->grabGesture(ThirdGesture,   flags);

    C->grabGesture(SixthGesture,   flags);

    D->grabGesture(FirstGesture,   flags);

    D->grabGesture(ThirdGesture,   flags);

    D->grabGesture(SeventhGesture, flags);

    // make sure all widgets ignore events, so they get propagated.

    QSet<Qt::GestureType> allGestureTypes;

    allGestureTypes << FirstGesture << SecondGesture << ThirdGesture

            << FourthGesture << FifthGesture << SixthGesture << SeventhGesture;

    A->ignoredGestures = B->ignoredGestures = allGestureTypes;

    C->ignoredGestures = D->ignoredGestures = allGestureTypes;

    CustomEvent event;

    sendCustomGesture(&event, D);

    static const int TotalGestureEventsCount = CustomGesture::SerialFinishedThreshold - CustomGesture::SerialStartedThreshold + 1;

    // gesture override events

    QCOMPARE(D->overrideEvents.all.count(FirstGesture), 1);

    QCOMPARE(D->overrideEvents.all.count(SecondGesture), 0);

    QCOMPARE(D->overrideEvents.all.count(ThirdGesture), 1);

    QCOMPARE(C->overrideEvents.all.count(FirstGesture), 1);

    QCOMPARE(C->overrideEvents.all.count(SecondGesture), 1);

    QCOMPARE(C->overrideEvents.all.count(ThirdGesture), 1);

    QCOMPARE(B->overrideEvents.all.count(FirstGesture), 0);

    QCOMPARE(B->overrideEvents.all.count(SecondGesture), 1);

    QCOMPARE(B->overrideEvents.all.count(ThirdGesture), 1);

    QCOMPARE(A->overrideEvents.all.count(FirstGesture), 1);

    QCOMPARE(A->overrideEvents.all.count(SecondGesture), 0);

    QCOMPARE(A->overrideEvents.all.count(ThirdGesture), 1);

    // normal gesture events

    QCOMPARE(D->events.all.count(FirstGesture), TotalGestureEventsCount);

    QCOMPARE(D->events.all.count(SecondGesture), 0);

    QCOMPARE(D->events.all.count(ThirdGesture), TotalGestureEventsCount);

    QCOMPARE(D->events.all.count(FourthGesture), 0);

    QCOMPARE(D->events.all.count(FifthGesture), 0);

    QCOMPARE(D->events.all.count(SixthGesture), 0);

    QCOMPARE(D->events.all.count(SeventhGesture), TotalGestureEventsCount);

    QCOMPARE(C->events.all.count(FirstGesture), TotalGestureEventsCount);

    QCOMPARE(C->events.all.count(SecondGesture), TotalGestureEventsCount);

    QCOMPARE(C->events.all.count(ThirdGesture), TotalGestureEventsCount);

    QCOMPARE(C->events.all.count(FourthGesture), 0);

    QCOMPARE(C->events.all.count(FifthGesture), 0);

    QCOMPARE(C->events.all.count(SixthGesture), TotalGestureEventsCount);

    QCOMPARE(C->events.all.count(SeventhGesture), 0);

    QCOMPARE(B->events.all.count(FirstGesture), 0);

    QCOMPARE(B->events.all.count(SecondGesture), TotalGestureEventsCount);

    QCOMPARE(B->events.all.count(ThirdGesture), TotalGestureEventsCount);

    QCOMPARE(B->events.all.count(FourthGesture), 0);

    QCOMPARE(B->events.all.count(FifthGesture), TotalGestureEventsCount);

    QCOMPARE(B->events.all.count(SixthGesture), 0);

    QCOMPARE(B->events.all.count(SeventhGesture), 0);

    QCOMPARE(A->events.all.count(FirstGesture), TotalGestureEventsCount);

    QCOMPARE(A->events.all.count(SecondGesture), 0);

    QCOMPARE(A->events.all.count(ThirdGesture), TotalGestureEventsCount);

    QCOMPARE(A->events.all.count(FourthGesture), TotalGestureEventsCount);

    QCOMPARE(A->events.all.count(FifthGesture), 0);

    QCOMPARE(A->events.all.count(SixthGesture), 0);

    QCOMPARE(A->events.all.count(SeventhGesture), 0);

    QGestureRecognizer::unregisterRecognizer(SecondGesture);

    QGestureRecognizer::unregisterRecognizer(ThirdGesture);

    QGestureRecognizer::unregisterRecognizer(FourthGesture);

    QGestureRecognizer::unregisterRecognizer(FifthGesture);

    QGestureRecognizer::unregisterRecognizer(SixthGesture);

    QGestureRecognizer::unregisterRecognizer(SeventhGesture);

}

void tst_Gestures::testMapToScene()

{

    QGesture gesture;

    QList<QGesture*> list;

    list << &gesture;

    QGestureEvent event(list);

    QCOMPARE(event.mapToGraphicsScene(gesture.hotSpot()), QPointF()); // not set, can't do much

    QGraphicsScene scene;

    QGraphicsView view(&scene);

    view.setWindowFlags(Qt::X11BypassWindowManagerHint);

    GestureItem *item0 = new GestureItem;

    scene.addItem(item0);

    item0->setPos(14, 16);

    view.show(); // need to show to give it a global coordinate

    QTest::qWaitForWindowShown(&view);

    view.ensureVisible(scene.sceneRect());

    QPoint origin = view.mapToGlobal(QPoint());

    event.setWidget(view.viewport());

    QCOMPARE(event.mapToGraphicsScene(origin + QPoint(100, 200)), view.mapToScene(QPoint(100, 200)));

}

void tst_Gestures::ungrabGesture() // a method on QWidget

{

    class MockGestureWidget : public GestureWidget {

    public:

        MockGestureWidget(const char *name = 0, QWidget *parent = 0)

            : GestureWidget(name, parent) { }

        QSet<QGesture*> gestures;

    protected:

        bool event(QEvent *event)

        {

            if (event->type() == QEvent::Gesture) {

                QGestureEvent *gestureEvent = static_cast<QGestureEvent*>(event);

                if (gestureEvent)

                    foreach (QGesture *g, gestureEvent->gestures())

                        gestures.insert(g);

            }

            return GestureWidget::event(event);

        }

    };

    MockGestureWidget parent("A");

    MockGestureWidget *a = &parent;

    MockGestureWidget *b = new MockGestureWidget("B", a);

    a->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);

    b->grabGesture(CustomGesture::GestureType);

    b->ignoredGestures << CustomGesture::GestureType;

    CustomEvent event;

    // sending an event will cause the QGesture objects to be instantiated for the widgets

    sendCustomGesture(&event, b);

    QCOMPARE(a->gestures.count(), 1);

    QPointer<QGesture> customGestureA;

    customGestureA = *(a->gestures.begin());

    QVERIFY(!customGestureA.isNull());

    QCOMPARE(customGestureA->gestureType(), CustomGesture::GestureType);

    QCOMPARE(b->gestures.count(), 1);

    QPointer<QGesture> customGestureB;

    customGestureB = *(b->gestures.begin());

    QVERIFY(!customGestureB.isNull());

    QVERIFY(customGestureA.data() == customGestureB.data());

    QCOMPARE(customGestureB->gestureType(), CustomGesture::GestureType);

    a->gestures.clear();

    // sending an event will cause the QGesture objects to be instantiated for the widget

    sendCustomGesture(&event, a);

    QCOMPARE(a->gestures.count(), 1);

    customGestureA = *(a->gestures.begin());

    QVERIFY(!customGestureA.isNull());

    QCOMPARE(customGestureA->gestureType(), CustomGesture::GestureType);

    QVERIFY(customGestureA.data() != customGestureB.data());

    a->ungrabGesture(CustomGesture::GestureType);

    //We changed the deletion of Gestures to lazy during QT-4022, so we can't ensure the QGesture is deleted until now

    QVERIFY(!customGestureB.isNull());

    a->gestures.clear();

    a->reset();

    // send again to 'b' and make sure a never gets it.

    sendCustomGesture(&event, b);

    //After all Gestures are processed in the QGestureManager, we can ensure the QGesture is now deleted

    QVERIFY(customGestureA.isNull());

    QCOMPARE(a->gestureEventsReceived, 0);

    QCOMPARE(a->gestureOverrideEventsReceived, 0);

}

void tst_Gestures::unregisterRecognizer() // a method on QApplication

{

    /*

     The hardest usecase to get right is when we remove a recognizer while several

     of the gestures it created are in active state and we immediately add a new recognizer

     for the same type (thus replacing the old one).

     The expected result is that all old gestures continue till they are finished/cancelled

     and the new recognizer starts creating gestures immediately at registration.

     This implies that deleting of the recognizer happens only when there are no more gestures

     that it created. (since gestures might have a pointer to the recognizer)

     */

}

void tst_Gestures::autoCancelGestures()

{

    class MockWidget : public GestureWidget {

      public:

        MockWidget(const char *name) : GestureWidget(name), badGestureEvents(0) { }

        bool event(QEvent *event)

        {

            if (event->type() == QEvent::Gesture) {

                QGestureEvent *ge = static_cast<QGestureEvent*>(event);

                if (ge->gestures().count() != 1)

                    ++badGestureEvents;   // event should contain exactly one gesture

                ge->gestures().first()->setGestureCancelPolicy(QGesture::CancelAllInContext);

            }

            return GestureWidget::event(event);

        }

        int badGestureEvents;

    };

    const Qt::GestureType secondGesture = QGestureRecognizer::registerRecognizer(new CustomGestureRecognizer);

    MockWidget parent("parent"); // this one sets the cancel policy to CancelAllInContext

    parent.resize(300, 100);

    parent.setWindowFlags(Qt::X11BypassWindowManagerHint);

    GestureWidget *child = new GestureWidget("child", &parent);

    child->setGeometry(10, 10, 100, 80);

    parent.grabGesture(CustomGesture::GestureType);

    child->grabGesture(secondGesture);

    parent.show();

    QTest::qWaitForWindowShown(&parent);

    /*

      An event is send to both the child and the parent, when the child gets it a gesture is triggered

      and send to the child.

      When the parent gets the event a new gesture is triggered and delivered to the parent. When the

      parent gets it he accepts it and that causes the cancel policy to activate.

      The cause of that is the gesture for the child is cancelled and send to the child as such.

    */

    CustomEvent event;

    event.serial = CustomGesture::SerialStartedThreshold;

    QApplication::sendEvent(child, &event);

    QCOMPARE(child->events.all.count(), 2);

    QCOMPARE(child->events.started.count(), 1);

    QCOMPARE(child->events.canceled.count(), 1);

    QCOMPARE(parent.events.all.count(), 1);

    // clean up, make the parent gesture finish

    event.serial = CustomGesture::SerialFinishedThreshold;

    QApplication::sendEvent(child, &event);

    QCOMPARE(parent.events.all.count(), 2);

    QCOMPARE(parent.badGestureEvents, 0);

}

void tst_Gestures::autoCancelGestures2()

{

    class MockItem : public GestureItem {

      public:

        MockItem(const char *name) : GestureItem(name), badGestureEvents(0) { }

        bool event(QEvent *event) {

            if (event->type() == QEvent::Gesture) {

                QGestureEvent *ge = static_cast<QGestureEvent*>(event);

                if (ge->gestures().count() != 1)

                    ++badGestureEvents;   // event should contain exactly one gesture

                ge->gestures().first()->setGestureCancelPolicy(QGesture::CancelAllInContext);

            }

            return GestureItem::event(event);

        }