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#include <QtTest/QtTest>
#include "../../shared/util.h"

#include <qevent.h>
#include <qwidget.h>
#include <qlayout.h>
#include <qgesture.h>
#include <qgesturerecognizer.h>
#include <qgraphicsitem.h>
#include <qgraphicsview.h>

#include <qdebug.h>

//TESTED_CLASS=
//TESTED_FILES=

static QPointF mapToGlobal(const QPointF &pt, QGraphicsItem *item, QGraphicsView *view)
{
    return view->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:
                    eventsPtr->started << g->gestureType();
                    break;
                case Qt::GestureUpdated:
                    eventsPtr->updated << g->gestureType();
                    break;
                case Qt::GestureFinished:
                    eventsPtr->finished << g->gestureType();
                    break;
                case Qt::GestureCanceled:
                    eventsPtr->canceled << g->gestureType();
                    break;
                default:
                    Q_ASSERT(false);
                }
            }
        } else if (event->type() == CustomEvent::EventType) {
            ++customEventsReceived;
        } else {
            return QWidget::event(event);
        }
        return true;
    }
};

// TODO rename to sendGestureSequence
static void sendCustomGesture(CustomEvent *event, QObject *object, QGraphicsScene *scene = 0)
{
    for (int i = CustomGesture::SerialMaybeThreshold;
         i <= CustomGesture::SerialFinishedThreshold; ++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 finishedWithoutStarted();
    void unknownGesture();
    void graphicsItemGesture();
    void graphicsItemTreeGesture();
    void explicitGraphicsObjectTarget();
    void gestureOverChildGraphicsItem();
    void twoGesturesOnDifferentLevel();
    void multipleGesturesInTree();
    void multipleGesturesInComplexTree();
    void testMapToScene();
    void ungrabGesture();
    void consumeEventHint();
    void unregisterRecognizer();
    void autoCancelGestures();
    void autoCancelGestures2();
};

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);
    CustomEvent event;
    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
{
    static int InstanceCount;

public:
    GestureItem(const char *name = 0)
    {
        instanceNumber = InstanceCount++;
        if (name)
            setObjectName(QLatin1String(name));
        size = QRectF(0, 0, 100, 100);
        customEventsReceived = 0;
        gestureEventsReceived = 0;
        gestureOverrideEventsReceived = 0;
        events.clear();
        overrideEvents.clear();
        acceptGestureOverride = false;
    }
    ~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;

    QRectF size;
    int instanceNumber;

    void reset()
    {
        customEventsReceived = 0;
        gestureEventsReceived = 0;
        gestureOverrideEventsReceived = 0;
        events.clear();
        overrideEvents.clear();
        ignoredGestures.clear();
    }

protected:
    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));
        } 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();
                    break;
                case Qt::GestureUpdated:
                    eventsPtr->updated << g->gestureType();
                    break;
                case Qt::GestureFinished:
                    eventsPtr->finished << g->gestureType();
                    break;
                case Qt::GestureCanceled:
                    eventsPtr->canceled << g->gestureType();
                    break;
                default:
                    Q_ASSERT(false);
                }
            }
        } else if (event->type() == CustomEvent::EventType) {
            ++customEventsReceived;
        } else {
            return QGraphicsObject::event(event);
        }
        return true;
    }
};
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());

    view.viewport()->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);
    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::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());

    view.viewport()->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);
    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());

    view.viewport()->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);
    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());

    view.viewport()->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);
    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);
    QVERIFY(customGestureA.isNull());
    QVERIFY(!customGestureB.isNull());

    a->gestures.clear();
    a->reset();
    // send again to 'b' and make sure a never gets it.
    sendCustomGesture(&event, b);
    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) { }

        bool event(QEvent *event)
        {
            if (event->type() == QEvent::Gesture) {
                QGestureEvent *ge = static_cast<QGestureEvent*>(event);
                Q_ASSERT(ge->gestures().count() == 1); // can't use QCOMPARE here...
                ge->gestures().first()->setGestureCancelPolicy(QGesture::CancelAllInContext);
            }
            return GestureWidget::event(event);
        }
    };

    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);
}

void tst_Gestures::autoCancelGestures2()
{
    class MockItem : public GestureItem {
      public:
        MockItem(const char *name) : GestureItem(name) { }

        bool event(QEvent *event) {
            if (event->type() == QEvent::Gesture) {
                QGestureEvent *ge = static_cast<QGestureEvent*>(event);
                Q_ASSERT(ge->gestures().count() == 1); // can't use QCOMPARE here...
                ge->gestures().first()->setGestureCancelPolicy(QGesture::CancelAllInContext);
            }
            return GestureItem::event(event);
        }
    };

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

    QGraphicsScene scene;
    QGraphicsView view(&scene);
    view.setWindowFlags(Qt::X11BypassWindowManagerHint);

    MockItem *parent = new MockItem("parent");
    GestureItem *child = new GestureItem("child");
    child->setParentItem(parent);
    parent->setPos(0, 0);
    child->setPos(10, 10);
    scene.addItem(parent);
    view.viewport()->grabGesture(CustomGesture::GestureType, Qt::DontStartGestureOnChildren);
    view.viewport()->grabGesture(secondGesture, Qt::DontStartGestureOnChildren);
    parent->grabGesture(CustomGesture::GestureType);
    child->grabGesture(secondGesture);

    view.show();
    QTest::qWaitForWindowShown(&view);
    view.ensureVisible(scene.sceneRect());

    CustomEvent event;
    event.serial = CustomGesture::SerialStartedThreshold;
    event.hasHotSpot = true;
    event.hotSpot = mapToGlobal(QPointF(5, 5), child, &view);
    // qDebug() << event.hotSpot;
    scene.sendEvent(child, &event);
    //QEventLoop().exec();
    QCOMPARE(parent->events.all.count(), 1);
    QCOMPARE(child->events.started.count(), 1);
    QCOMPARE(child->events.canceled.count(), 1);
    QCOMPARE(child->events.all.count(), 2);

    // clean up, make the parent gesture finish
    event.serial = CustomGesture::SerialFinishedThreshold;
    scene.sendEvent(child, &event);
    QCOMPARE(parent->events.all.count(), 2);
}

QTEST_MAIN(tst_Gestures)
#include "tst_gestures.moc"