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    41 

    42 #include "mousepangesturerecognizer.h"

    43 

    44 #include <QEvent>

    45 #include <QMouseEvent>

    46 #include <QGesture>

    47 

    48 MousePanGestureRecognizer::MousePanGestureRecognizer()

    49 {

    50 }

    51 

    52 QGesture* MousePanGestureRecognizer::createGesture(QObject *) const

    53 {

    54     return new QPanGesture;

    55 }

    56 

    57 QGestureRecognizer::Result MousePanGestureRecognizer::filterEvent(QGesture *state, QObject *, QEvent *event)

    58 {

    59     QPanGesture *g = static_cast<QPanGesture *>(state);

    60     QMouseEvent *me = static_cast<QMouseEvent *>(event);

    61     if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonDblClick) {

    62         g->setHotSpot(me->globalPos());

    63         g->setProperty("lastPos", me->globalPos());

    64         g->setProperty("pressed", QVariant::fromValue<bool>(true));

    65         return QGestureRecognizer::GestureTriggered | QGestureRecognizer::ConsumeEventHint;

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

    67         if (g->property("pressed").toBool()) {

    68             QPoint pos = me->globalPos();

    69             QPoint lastPos = g->property("lastPos").toPoint();

    70             g->setLastOffset(g->offset());

    71             lastPos = pos - lastPos;

    72             g->setOffset(QPointF(lastPos.x(), lastPos.y()));

    73             g->setTotalOffset(g->totalOffset() + QPointF(lastPos.x(), lastPos.y()));

    74             g->setProperty("lastPos", pos);

    75             return QGestureRecognizer::GestureTriggered | QGestureRecognizer::ConsumeEventHint;

    76         }

    77         return QGestureRecognizer::NotGesture;

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

    79         return QGestureRecognizer::GestureFinished | QGestureRecognizer::ConsumeEventHint;

    80     }

    81     return QGestureRecognizer::Ignore;

    82 }

    83 

    84 void MousePanGestureRecognizer::reset(QGesture *state)

    85 {

    86     QPanGesture *g = static_cast<QPanGesture *>(state);

    87     g->setTotalOffset(QPointF());

    88     g->setLastOffset(QPointF());

    89     g->setOffset(QPointF());

    90     g->setAcceleration(0);

    91     g->setProperty("lastPos", QVariant());

    92     g->setProperty("pressed", QVariant::fromValue<bool>(false));

    93     QGestureRecognizer::reset(state);

    94 }