source: trunk/src/gui/kernel/qmacgesturerecognizer_mac.mm@ 642

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#include "qmacgesturerecognizer_mac_p.h"
#include "qgesture.h"
#include "qgesture_p.h"
#include "qevent.h"
#include "qevent_p.h"
#include "qwidget.h"
#include "qdebug.h"

QT_BEGIN_NAMESPACE

QMacSwipeGestureRecognizer::QMacSwipeGestureRecognizer()
{
}

QGesture *QMacSwipeGestureRecognizer::create(QObject * /*target*/)
{
    return new QSwipeGesture;
}

QGestureRecognizer::Result
QMacSwipeGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
{
    if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
        QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
        switch (ev->gestureType) {
            case QNativeGestureEvent::Swipe: {
                QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
                g->setSwipeAngle(ev->angle);
                return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
                break; }
            default:
                break;
        }
    }

    return QGestureRecognizer::Ignore;
}

void QMacSwipeGestureRecognizer::reset(QGesture *gesture)
{
    QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
    g->setSwipeAngle(0);
    QGestureRecognizer::reset(gesture);
}

////////////////////////////////////////////////////////////////////////

QMacPinchGestureRecognizer::QMacPinchGestureRecognizer()
{
}

QGesture *QMacPinchGestureRecognizer::create(QObject * /*target*/)
{
    return new QPinchGesture;
}

QGestureRecognizer::Result
QMacPinchGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
{
    if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
        QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
        QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
        switch(ev->gestureType) {
        case QNativeGestureEvent::GestureBegin:
            reset(gesture);
            g->setStartCenterPoint(static_cast<QWidget*>(obj)->mapFromGlobal(ev->position));
            g->setCenterPoint(g->startCenterPoint());
            g->setChangeFlags(QPinchGesture::CenterPointChanged);
            g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
            return QGestureRecognizer::MayBeGesture | QGestureRecognizer::ConsumeEventHint;
        case QNativeGestureEvent::Rotate: {
            g->setLastScaleFactor(g->scaleFactor());
            g->setLastRotationAngle(g->rotationAngle());
            g->setRotationAngle(g->rotationAngle() + ev->percentage);
            g->setChangeFlags(QPinchGesture::RotationAngleChanged);
            g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
        }
        case QNativeGestureEvent::Zoom:
            g->setLastScaleFactor(g->scaleFactor());
            g->setLastRotationAngle(g->rotationAngle());
            g->setScaleFactor(g->scaleFactor() * (1 + ev->percentage));
            g->setChangeFlags(QPinchGesture::ScaleFactorChanged);
            g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
        case QNativeGestureEvent::GestureEnd:
            return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
        default:
            break;
        }
    }

    return QGestureRecognizer::Ignore;
}

void QMacPinchGestureRecognizer::reset(QGesture *gesture)
{
    QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
    g->setChangeFlags(0);
    g->setTotalChangeFlags(0);
    g->setScaleFactor(1.0f);
    g->setTotalScaleFactor(1.0f);