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#include <QtGui>

#include <QtTest>

class tst_QTouchEventWidget : public QWidget

{

public:

    QList<QTouchEvent::TouchPoint> touchBeginPoints, touchUpdatePoints, touchEndPoints;

    bool seenTouchBegin, seenTouchUpdate, seenTouchEnd;

    bool acceptTouchBegin, acceptTouchUpdate, acceptTouchEnd;

    bool deleteInTouchBegin, deleteInTouchUpdate, deleteInTouchEnd;

    tst_QTouchEventWidget()

        : QWidget()

    {

        reset();

    }

    void reset()

    {

        touchBeginPoints.clear();

        touchUpdatePoints.clear();

        touchEndPoints.clear();

        seenTouchBegin = seenTouchUpdate = seenTouchEnd = false;

        acceptTouchBegin = acceptTouchUpdate = acceptTouchEnd = true;

        deleteInTouchBegin = deleteInTouchUpdate = deleteInTouchEnd = false;

    }

    bool event(QEvent *event)

    {

        switch (event->type()) {

        case QEvent::TouchBegin:

            if (seenTouchBegin) qWarning("TouchBegin: already seen a TouchBegin");

            if (seenTouchUpdate) qWarning("TouchBegin: TouchUpdate cannot happen before TouchBegin");

            if (seenTouchEnd) qWarning("TouchBegin: TouchEnd cannot happen before TouchBegin");

            seenTouchBegin = !seenTouchBegin && !seenTouchUpdate && !seenTouchEnd;

            touchBeginPoints = static_cast<QTouchEvent *>(event)->touchPoints();

            event->setAccepted(acceptTouchBegin);

            if (deleteInTouchBegin)

                delete this;

            break;

        case QEvent::TouchUpdate:

            if (!seenTouchBegin) qWarning("TouchUpdate: have not seen TouchBegin");

            if (seenTouchEnd) qWarning("TouchUpdate: TouchEnd cannot happen before TouchUpdate");

            seenTouchUpdate = seenTouchBegin && !seenTouchEnd;

            touchUpdatePoints = static_cast<QTouchEvent *>(event)->touchPoints();

            event->setAccepted(acceptTouchUpdate);

            if (deleteInTouchUpdate)

                delete this;

            break;

        case QEvent::TouchEnd:

            if (!seenTouchBegin) qWarning("TouchEnd: have not seen TouchBegin");

            if (seenTouchEnd) qWarning("TouchEnd: already seen a TouchEnd");

            seenTouchEnd = seenTouchBegin && !seenTouchEnd;

            touchEndPoints = static_cast<QTouchEvent *>(event)->touchPoints();

            event->setAccepted(acceptTouchEnd);

            if (deleteInTouchEnd)

                delete this;

            break;

        default:

            return QWidget::event(event);

        }

        return true;

    }

};

class tst_QTouchEventGraphicsItem : public QGraphicsItem

{

public:

    QList<QTouchEvent::TouchPoint> touchBeginPoints, touchUpdatePoints, touchEndPoints;

    bool seenTouchBegin, seenTouchUpdate, seenTouchEnd;

    bool acceptTouchBegin, acceptTouchUpdate, acceptTouchEnd;

    bool deleteInTouchBegin, deleteInTouchUpdate, deleteInTouchEnd;

    tst_QTouchEventGraphicsItem **weakpointer;

    tst_QTouchEventGraphicsItem()

        : QGraphicsItem(), weakpointer(0)

    {

        reset();

    }

    ~tst_QTouchEventGraphicsItem()

    {

        if (weakpointer)

            *weakpointer = 0;

    }

    void reset()

    {

        touchBeginPoints.clear();

        touchUpdatePoints.clear();

        touchEndPoints.clear();

        seenTouchBegin = seenTouchUpdate = seenTouchEnd = false;

        acceptTouchBegin = acceptTouchUpdate = acceptTouchEnd = true;

        deleteInTouchBegin = deleteInTouchUpdate = deleteInTouchEnd = false;

    }

    QRectF boundingRect() const { return QRectF(0, 0, 10, 10); }

    void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *) { }

    bool sceneEvent(QEvent *event)

    {

        switch (event->type()) {

        case QEvent::TouchBegin:

            if (seenTouchBegin) qWarning("TouchBegin: already seen a TouchBegin");

            if (seenTouchUpdate) qWarning("TouchBegin: TouchUpdate cannot happen before TouchBegin");

            if (seenTouchEnd) qWarning("TouchBegin: TouchEnd cannot happen before TouchBegin");

            seenTouchBegin = !seenTouchBegin && !seenTouchUpdate && !seenTouchEnd;

            touchBeginPoints = static_cast<QTouchEvent *>(event)->touchPoints();

            event->setAccepted(acceptTouchBegin);

            if (deleteInTouchBegin)

                delete this;

            break;

        case QEvent::TouchUpdate:

            if (!seenTouchBegin) qWarning("TouchUpdate: have not seen TouchBegin");

            if (seenTouchEnd) qWarning("TouchUpdate: TouchEnd cannot happen before TouchUpdate");

            seenTouchUpdate = seenTouchBegin && !seenTouchEnd;

            touchUpdatePoints = static_cast<QTouchEvent *>(event)->touchPoints();

            event->setAccepted(acceptTouchUpdate);

            if (deleteInTouchUpdate)

                delete this;

            break;

        case QEvent::TouchEnd:

            if (!seenTouchBegin) qWarning("TouchEnd: have not seen TouchBegin");

            if (seenTouchEnd) qWarning("TouchEnd: already seen a TouchEnd");

            seenTouchEnd = seenTouchBegin && !seenTouchEnd;

            touchEndPoints = static_cast<QTouchEvent *>(event)->touchPoints();

            event->setAccepted(acceptTouchEnd);

            if (deleteInTouchEnd)

                delete this;

            break;

        default:

            return QGraphicsItem::sceneEvent(event);

        }

        return true;

    }

};

class tst_QTouchEvent : public QObject

{

    Q_OBJECT

public:

    tst_QTouchEvent() { }

    ~tst_QTouchEvent() { }

private slots:

    void touchDisabledByDefault();

    void touchEventAcceptedByDefault();

    void touchBeginPropagatesWhenIgnored();

    void touchUpdateAndEndNeverPropagate();

    void basicRawEventTranslation();

    void multiPointRawEventTranslationOnTouchScreen();

    void multiPointRawEventTranslationOnTouchPad();

    void deleteInEventHandler();

    void deleteInRawEventTranslation();

};

void tst_QTouchEvent::touchDisabledByDefault()

{

    // QWidget

    {

        // the widget attribute is not enabled by default

        QWidget widget;

        QVERIFY(!widget.testAttribute(Qt::WA_AcceptTouchEvents));

        // events should not be accepted since they are not enabled

        QList<QTouchEvent::TouchPoint> touchPoints;

        touchPoints.append(QTouchEvent::TouchPoint(0));

        QTouchEvent touchEvent(QEvent::TouchBegin,

                               QTouchEvent::TouchScreen,

                               Qt::NoModifier,

                               Qt::TouchPointPressed,

                               touchPoints);

        bool res = QApplication::sendEvent(&widget, &touchEvent);

        QVERIFY(!res);

        QVERIFY(!touchEvent.isAccepted());

    }

    // QGraphicsView

    {

        QGraphicsScene scene;

        tst_QTouchEventGraphicsItem item;

        QGraphicsView view(&scene);

        scene.addItem(&item);

        item.setPos(100, 100);

        view.resize(200, 200);

        view.fitInView(scene.sceneRect());

        // touch events are not accepted by default

        QVERIFY(!item.acceptTouchEvents());

        // compose an event to the scene that is over the item

        QTouchEvent::TouchPoint touchPoint(0);

        touchPoint.setState(Qt::TouchPointPressed);

        touchPoint.setPos(view.mapFromScene(item.mapToScene(item.boundingRect().center())));

        touchPoint.setScreenPos(view.mapToGlobal(touchPoint.pos().toPoint()));

        touchPoint.setScenePos(view.mapToScene(touchPoint.pos().toPoint()));

        QTouchEvent touchEvent(QEvent::TouchBegin,

                               QTouchEvent::TouchScreen,

                               Qt::NoModifier,

                               Qt::TouchPointPressed,

                               (QList<QTouchEvent::TouchPoint>() << touchPoint));

        bool res = QApplication::sendEvent(view.viewport(), &touchEvent);

        QVERIFY(!res);

        QVERIFY(!touchEvent.isAccepted());

        QVERIFY(!item.seenTouchBegin);

    }

}

void tst_QTouchEvent::touchEventAcceptedByDefault()

{

    // QWidget

    {

        // enabling touch events should automatically accept touch events

        QWidget widget;

        widget.setAttribute(Qt::WA_AcceptTouchEvents);

        // QWidget handles touch event by converting them into a mouse event, so the event is both

        // accepted and handled (res == true)

        QList<QTouchEvent::TouchPoint> touchPoints;

        touchPoints.append(QTouchEvent::TouchPoint(0));

        QTouchEvent touchEvent(QEvent::TouchBegin,

                               QTouchEvent::TouchScreen,

                               Qt::NoModifier,

                               Qt::TouchPointPressed,

                               touchPoints);

        bool res = QApplication::sendEvent(&widget, &touchEvent);

        QVERIFY(res);

        QVERIFY(touchEvent.isAccepted());

        // tst_QTouchEventWidget does handle, sending succeeds

        tst_QTouchEventWidget touchWidget;

        touchWidget.setAttribute(Qt::WA_AcceptTouchEvents);

        touchEvent.ignore();

        res = QApplication::sendEvent(&touchWidget, &touchEvent);

        QVERIFY(res);

        QVERIFY(touchEvent.isAccepted());

    }

    // QGraphicsView

    {

        QGraphicsScene scene;

        tst_QTouchEventGraphicsItem item;

        QGraphicsView view(&scene);

        scene.addItem(&item);

        item.setPos(100, 100);

        view.resize(200, 200);

        view.fitInView(scene.sceneRect());

        // enabling touch events on the item also enables events on the viewport

        item.setAcceptTouchEvents(true);

        QVERIFY(view.viewport()->testAttribute(Qt::WA_AcceptTouchEvents));

        // compose an event to the scene that is over the item

        QTouchEvent::TouchPoint touchPoint(0);

        touchPoint.setState(Qt::TouchPointPressed);

        touchPoint.setPos(view.mapFromScene(item.mapToScene(item.boundingRect().center())));

        touchPoint.setScreenPos(view.mapToGlobal(touchPoint.pos().toPoint()));

        touchPoint.setScenePos(view.mapToScene(touchPoint.pos().toPoint()));

        QTouchEvent touchEvent(QEvent::TouchBegin,

                               QTouchEvent::TouchScreen,

                               Qt::NoModifier,

                               Qt::TouchPointPressed,

                               (QList<QTouchEvent::TouchPoint>() << touchPoint));

        bool res = QApplication::sendEvent(view.viewport(), &touchEvent);

        QVERIFY(res);

        QVERIFY(touchEvent.isAccepted());

        QVERIFY(item.seenTouchBegin);

    }

}

void tst_QTouchEvent::touchBeginPropagatesWhenIgnored()

{

    // QWidget

    {

        tst_QTouchEventWidget window, child, grandchild;

        child.setParent(&window);

        grandchild.setParent(&child);

        // all widgets accept touch events, grandchild ignores, so child sees the event, but not window

        window.setAttribute(Qt::WA_AcceptTouchEvents);

        child.setAttribute(Qt::WA_AcceptTouchEvents);

        grandchild.setAttribute(Qt::WA_AcceptTouchEvents);

        grandchild.acceptTouchBegin = false;

        QList<QTouchEvent::TouchPoint> touchPoints;

        touchPoints.append(QTouchEvent::TouchPoint(0));

        QTouchEvent touchEvent(QEvent::TouchBegin,

                               QTouchEvent::TouchScreen,

                               Qt::NoModifier,

                               Qt::TouchPointPressed,

                               touchPoints);

        bool res = QApplication::sendEvent(&grandchild, &touchEvent);

        QVERIFY(res);

        QVERIFY(touchEvent.isAccepted());

        QVERIFY(grandchild.seenTouchBegin);

        QVERIFY(child.seenTouchBegin);

        QVERIFY(!window.seenTouchBegin);

        // disable touch on grandchild. even though it doesn't accept it, child should still get the

        // TouchBegin

        grandchild.reset();

        child.reset();

        window.reset();

        grandchild.setAttribute(Qt::WA_AcceptTouchEvents, false);

        touchEvent.ignore();

        res = QApplication::sendEvent(&grandchild, &touchEvent);

        QVERIFY(res);

        QVERIFY(touchEvent.isAccepted());

        QVERIFY(!grandchild.seenTouchBegin);

        QVERIFY(child.seenTouchBegin);

        QVERIFY(!window.seenTouchBegin);

    }

    // QGraphicsView

    {

        QGraphicsScene scene;

        tst_QTouchEventGraphicsItem root, child, grandchild;        

        QGraphicsView view(&scene);

        scene.addItem(&root);

        root.setPos(100, 100);

        child.setParentItem(&root);

        grandchild.setParentItem(&child);

        view.resize(200, 200);

        view.fitInView(scene.sceneRect());

        // all items accept touch events, grandchild ignores, so child sees the event, but not root

        root.setAcceptTouchEvents(true);

        child.setAcceptTouchEvents(true);

        grandchild.setAcceptTouchEvents(true);

        grandchild.acceptTouchBegin = false;

        // compose an event to the scene that is over the grandchild

        QTouchEvent::TouchPoint touchPoint(0);

        touchPoint.setState(Qt::TouchPointPressed);

        touchPoint.setPos(view.mapFromScene(grandchild.mapToScene(grandchild.boundingRect().center())));

        touchPoint.setScreenPos(view.mapToGlobal(touchPoint.pos().toPoint()));

        touchPoint.setScenePos(view.mapToScene(touchPoint.pos().toPoint()));

        QTouchEvent touchEvent(QEvent::TouchBegin,

                               QTouchEvent::TouchScreen,

                               Qt::NoModifier,

                               Qt::TouchPointPressed,

                               (QList<QTouchEvent::TouchPoint>() << touchPoint));

        bool res = QApplication::sendEvent(view.viewport(), &touchEvent);

        QVERIFY(res);

        QVERIFY(touchEvent.isAccepted());

        QVERIFY(grandchild.seenTouchBegin);

        QVERIFY(child.seenTouchBegin);

        QVERIFY(!root.seenTouchBegin);

    }

    // QGraphicsView

    {

        QGraphicsScene scene;

        tst_QTouchEventGraphicsItem root, child, grandchild;

        QGraphicsView view(&scene);

        scene.addItem(&root);

        root.setPos(100, 100);

        child.setParentItem(&root);

        grandchild.setParentItem(&child);

        view.resize(200, 200);

        view.fitInView(scene.sceneRect());

        // leave touch disabled on grandchild. even though it doesn't accept it, child should

        // still get the TouchBegin

        root.setAcceptTouchEvents(true);

        child.setAcceptTouchEvents(true);

        // compose an event to the scene that is over the grandchild

        QTouchEvent::TouchPoint touchPoint(0);

        touchPoint.setState(Qt::TouchPointPressed);

        touchPoint.setPos(view.mapFromScene(grandchild.mapToScene(grandchild.boundingRect().center())));

        touchPoint.setScreenPos(view.mapToGlobal(touchPoint.pos().toPoint()));

        touchPoint.setScenePos(view.mapToScene(touchPoint.pos().toPoint()));

        QTouchEvent touchEvent(QEvent::TouchBegin,

                               QTouchEvent::TouchScreen,

                               Qt::NoModifier,

                               Qt::TouchPointPressed,

                               (QList<QTouchEvent::TouchPoint>() << touchPoint));

        bool res = QApplication::sendEvent(view.viewport(), &touchEvent);

        QVERIFY(res);

        QVERIFY(touchEvent.isAccepted());

        QVERIFY(!grandchild.seenTouchBegin);

        QVERIFY(child.seenTouchBegin);

        QVERIFY(!root.seenTouchBegin);

    }

}

void tst_QTouchEvent::touchUpdateAndEndNeverPropagate()

{

    // QWidget

    {

        tst_QTouchEventWidget window, child;

        child.setParent(&window);

        window.setAttribute(Qt::WA_AcceptTouchEvents);

        child.setAttribute(Qt::WA_AcceptTouchEvents);

        child.acceptTouchUpdate = false;

        child.acceptTouchEnd = false;

        QList<QTouchEvent::TouchPoint> touchPoints;

        touchPoints.append(QTouchEvent::TouchPoint(0));

        QTouchEvent touchBeginEvent(QEvent::TouchBegin,

                                    QTouchEvent::TouchScreen,

                                    Qt::NoModifier,

                                    Qt::TouchPointPressed,

                                    touchPoints);

        bool res = QApplication::sendEvent(&child, &touchBeginEvent);

        QVERIFY(res);

        QVERIFY(touchBeginEvent.isAccepted());

        QVERIFY(child.seenTouchBegin);

        QVERIFY(!window.seenTouchBegin);

        // send the touch update to the child, but ignore it, it doesn't propagate

        QTouchEvent touchUpdateEvent(QEvent::TouchUpdate,

                                     QTouchEvent::TouchScreen,

                                     Qt::NoModifier,

                                     Qt::TouchPointMoved,

                                     touchPoints);

        res = QApplication::sendEvent(&child, &touchUpdateEvent);

        QVERIFY(res);

        QVERIFY(!touchUpdateEvent.isAccepted());

        QVERIFY(child.seenTouchUpdate);

        QVERIFY(!window.seenTouchUpdate);

        // send the touch end, same thing should happen as with touch update

        QTouchEvent touchEndEvent(QEvent::TouchEnd,

                                  QTouchEvent::TouchScreen,

                                  Qt::NoModifier,

                                  Qt::TouchPointReleased,

                                  touchPoints);

        res = QApplication::sendEvent(&child, &touchEndEvent);

        QVERIFY(res);

        QVERIFY(!touchEndEvent.isAccepted());

        QVERIFY(child.seenTouchEnd);

        QVERIFY(!window.seenTouchEnd);

    }

    // QGraphicsView

    {

        QGraphicsScene scene;

        tst_QTouchEventGraphicsItem root, child, grandchild;

        QGraphicsView view(&scene);

        scene.addItem(&root);

        root.setPos(100, 100);

        child.setParentItem(&root);

        grandchild.setParentItem(&child);

        view.resize(200, 200);

        view.fitInView(scene.sceneRect());

        root.setAcceptTouchEvents(true);

        child.setAcceptTouchEvents(true);

        child.acceptTouchUpdate = false;

        child.acceptTouchEnd = false;

        // compose an event to the scene that is over the child

        QTouchEvent::TouchPoint touchPoint(0);

        touchPoint.setState(Qt::TouchPointPressed);

        touchPoint.setPos(view.mapFromScene(grandchild.mapToScene(grandchild.boundingRect().center())));

        touchPoint.setScreenPos(view.mapToGlobal(touchPoint.pos().toPoint()));

        touchPoint.setScenePos(view.mapToScene(touchPoint.pos().toPoint()));

        QTouchEvent touchBeginEvent(QEvent::TouchBegin,

                                    QTouchEvent::TouchScreen,

                                    Qt::NoModifier,

                                    Qt::TouchPointPressed,

                                    (QList<QTouchEvent::TouchPoint>() << touchPoint));

        bool res = QApplication::sendEvent(view.viewport(), &touchBeginEvent);

        QVERIFY(res);

        QVERIFY(touchBeginEvent.isAccepted());

        QVERIFY(child.seenTouchBegin);

        QVERIFY(!root.seenTouchBegin);

        // send the touch update to the child, but ignore it, it doesn't propagate

        touchPoint.setState(Qt::TouchPointMoved);

        QTouchEvent touchUpdateEvent(QEvent::TouchUpdate,

                                     QTouchEvent::TouchScreen,

                                     Qt::NoModifier,

                                     Qt::TouchPointMoved,

                                     (QList<QTouchEvent::TouchPoint>() << touchPoint));

        res = QApplication::sendEvent(view.viewport(), &touchUpdateEvent);

        QVERIFY(res);

        // the scene accepts the event, since it found an item to send the event to

        QVERIFY(!touchUpdateEvent.isAccepted());