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#include "gestures.h"

#include <QTouchEvent>

Qt::GestureType ThreeFingerSlideGesture::Type = Qt::CustomGesture;

QGesture *ThreeFingerSlideGestureRecognizer::create(QObject *)

{

    return new ThreeFingerSlideGesture;

}

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

{

    ThreeFingerSlideGesture *d = static_cast<ThreeFingerSlideGesture *>(state);

    QGestureRecognizer::Result result;

    switch (event->type()) {

    case QEvent::TouchBegin:

        result = QGestureRecognizer::MayBeGesture;

    case QEvent::TouchEnd:

        if (d->gestureFired)

            result = QGestureRecognizer::FinishGesture;

        else

            result = QGestureRecognizer::CancelGesture;

    case QEvent::TouchUpdate:

        if (d->state() != Qt::NoGesture) {

            QTouchEvent *ev = static_cast<QTouchEvent*>(event);

            if (ev->touchPoints().size() == 3) {

                d->gestureFired = true;

                result = QGestureRecognizer::TriggerGesture;

            } else {

                result = QGestureRecognizer::MayBeGesture;

                for (int i = 0; i < ev->touchPoints().size(); ++i) {

                    const QTouchEvent::TouchPoint &pt = ev->touchPoints().at(i);

                    const int distance = (pt.pos().toPoint() - pt.startPos().toPoint()).manhattanLength();

                    if (distance > 20) {

                        result = QGestureRecognizer::CancelGesture;

                    }

                }

            }

        } else {

            result = QGestureRecognizer::CancelGesture;

        }

        break;

    case QEvent::MouseButtonPress:

    case QEvent::MouseButtonRelease:

    case QEvent::MouseMove:

        if (d->state() != Qt::NoGesture)

            result = QGestureRecognizer::Ignore;

        else

            result = QGestureRecognizer::CancelGesture;

        break;

    default:

        result = QGestureRecognizer::Ignore;

        break;

    }

    return result;

}

void ThreeFingerSlideGestureRecognizer::reset(QGesture *state)

{

    static_cast<ThreeFingerSlideGesture *>(state)->gestureFired = false;

    QGestureRecognizer::reset(state);

}

QGesture *RotateGestureRecognizer::create(QObject *)

{

    return new QGesture;

}

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

{

    switch (event->type()) {

    case QEvent::TouchBegin:

    case QEvent::TouchEnd:

    case QEvent::TouchUpdate:

        break;

    default:

        break;

    }

    return QGestureRecognizer::Ignore;

}

void RotateGestureRecognizer::reset(QGesture *state)

{

    QGestureRecognizer::reset(state);

}

#include "moc_gestures.cpp"