/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the test suite of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, 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 qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "mousepangesturerecognizer.h"

#include <QEvent>

#include <QMouseEvent>

#include <QGesture>

MousePanGestureRecognizer::MousePanGestureRecognizer()

{

}

QGesture *MousePanGestureRecognizer::create(QObject *)

{

    return new QPanGesture;

}

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

{

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

    if (event->type() == QEvent::TouchBegin) {

        // ignore the following mousepress event

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

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

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

    }

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

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

        if (g->property("ignoreMousePress").toBool())

            return QGestureRecognizer::Ignore;

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

        g->setProperty("startPos", me->globalPos());

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

        return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;

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

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

            QPoint offset = me->globalPos() - g->property("startPos").toPoint();

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

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

            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;

        }

        return QGestureRecognizer::CancelGesture;

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

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

            return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;

    }

    return QGestureRecognizer::Ignore;

}

void MousePanGestureRecognizer::reset(QGesture *state)

{

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

    g->setLastOffset(QPointF());

    g->setOffset(QPointF());

    g->setAcceleration(0);

    g->setProperty("startPos", QVariant());

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

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

    QGestureRecognizer::reset(state);

}