/****************************************************************************
**
** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (developer.feedback@nokia.com)
**
** This file is part of the HbCore module of the UI Extensions for Mobile.
**
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at developer.feedback@nokia.com.
**
****************************************************************************/
#include "hbswipegesture.h"
#include "hbswipegesturelogic_p.h"
#include "hbgestures_p.h"
#include "hbpointrecorder_p.h"
#include "hbvelocitycalculator_p.h"
#include <hbdeviceprofile.h>
#include <QEvent>
#include <QGestureRecognizer>
#include <QGraphicsView>
#include <QMouseEvent>
/*!
@hbcore
\internal
\class HbSwipeGestureLogic
\brief
*/
/*!
\internal
\brief
\return
*/
HbSwipeGestureLogic::HbSwipeGestureLogic()
{
}
HbSwipeGestureLogic::~HbSwipeGestureLogic() {}
/*!
\internal
\brief
\return
*/
bool HbSwipeGestureLogic::isMouseEvent(QEvent::Type eventType)
{
return eventType == QEvent::MouseButtonPress ||
eventType == QEvent::MouseMove ||
eventType == QEvent::MouseButtonDblClick ||
eventType == QEvent::MouseButtonRelease;
}
/*!
\internal
\brief
\return
*/
void HbSwipeGestureLogic::resetGesture(HbSwipeGesture *gesture)
{
gesture->setSwipeAngle(0);
gesture->setSceneSwipeAngle(0);
gesture->d_func()->mStartPos = QPointF();
gesture->d_func()->mSceneStartPos = QPointF();
}
/*!
\internal
\brief
\return
*/
QGestureRecognizer::Result HbSwipeGestureLogic::handleMousePress(
Qt::GestureState gestureState,
HbSwipeGesture *gesture,
QObject *watched,
QMouseEvent *me,
qint64 currentTime)
{
// Just ignore situations that are not interesting at all.
if (!(gestureState == Qt::NoGesture && me->button() == Qt::LeftButton)) {
return QGestureRecognizer::Ignore;
}
gesture->d_func()->mStartTime = currentTime;
gesture->d_func()->mStartPos = me->globalPos();
gesture->d_func()->mSceneStartPos = HbGestureUtils::mapToScene(watched, me->globalPos());
gesture->setHotSpot(me->globalPos());
qreal velocityThreshold = HbPanVelocityUpdateThreshold * HbDeviceProfile::current().ppmValue();
gesture->d_ptr->mAxisX.resetRecorder(velocityThreshold);
gesture->d_ptr->mAxisY.resetRecorder(velocityThreshold);
gesture->d_ptr->mAxisX.record(me->globalPos().x(), currentTime);
gesture->d_ptr->mAxisY.record(me->globalPos().y(), currentTime);
return QGestureRecognizer::MayBeGesture;
}
/*!
\internal
\brief
\return
*/
QGestureRecognizer::Result HbSwipeGestureLogic::handleMouseMove(
Qt::GestureState gestureState,
HbSwipeGesture *gesture,
QObject *watched,
QMouseEvent *me,
qint64 currentTime )
{
Q_UNUSED(watched);
Q_UNUSED(gestureState);
if (!me->buttons().testFlag(Qt::LeftButton)){
return QGestureRecognizer::Ignore;
}
gesture->d_ptr->mAxisX.record(me->globalPos().x(), currentTime);
gesture->d_ptr->mAxisY.record(me->globalPos().y(), currentTime);
return QGestureRecognizer::MayBeGesture;
}
/*!
\internal
\brief
\return
*/
#include <QDebug>
QGestureRecognizer::Result HbSwipeGestureLogic::handleMouseRelease(
Qt::GestureState gestureState,
HbSwipeGesture *gesture,
QObject *watched,
QMouseEvent *me,
qint64 currentTime )
{
Q_UNUSED(gesture);
Q_UNUSED(watched);
Q_UNUSED(gestureState);
if (me->button() != Qt::LeftButton) {
return QGestureRecognizer::Ignore;
}
QPoint totalOffset = me->globalPos() - gesture->d_func()->mStartPos.toPoint();
qint64 deltaTime = currentTime - gesture->d_func()->mStartTime;
QPointF velocity = deltaTime != 0 ? totalOffset / deltaTime : QPointF(0,0);
gesture->setSwipeAngle(QLineF(gesture->d_func()->mStartPos, me->globalPos()).angle());
gesture->setSceneSwipeAngle(QLineF(gesture->d_func()->mSceneStartPos, HbGestureUtils::mapToScene(watched, me->globalPos())).angle());
bool movedEnough = totalOffset.manhattanLength() >= (int)(HbSwipeMinOffset * HbDeviceProfile::current().ppmValue());
bool fastEnough = velocity.manhattanLength() >= HbSwipeMinSpeed * HbDeviceProfile::current().ppmValue();
bool notStoppedAtEnd = HbVelocityCalculator(gesture->d_func()->mAxisX, gesture->d_func()->mAxisY).velocity(currentTime) != QPointF(0,0);
if (movedEnough && fastEnough && notStoppedAtEnd) {
return QGestureRecognizer::FinishGesture;
} else {
return QGestureRecognizer::Ignore;
}
}
/*!
\internal
\brief
\return
*/
QGestureRecognizer::Result HbSwipeGestureLogic::recognize(
Qt::GestureState gestureState,
HbSwipeGesture *gesture,
QObject *watched,
QEvent *event,
qint64 currentTime)
{
if ( isMouseEvent(event->type()) )
{
QMouseEvent* me = static_cast<QMouseEvent*>(event);
switch(event->type())
{
case QEvent::MouseButtonDblClick:
case QEvent::MouseButtonPress:
return handleMousePress(gestureState, gesture, watched, me, currentTime);
case QEvent::MouseMove:
return handleMouseMove(gestureState, gesture, watched, me, currentTime);
case QEvent::MouseButtonRelease:
return handleMouseRelease(gestureState, gesture, watched, me, currentTime);
default: break;
}
}
return QGestureRecognizer::Ignore;
}