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/****************************************************************************
**
** Copyright (C) 2009 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 <QVariant>
#include <QGraphicsSceneMouseEvent>
#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);
QPoint globalPos;
switch (event->type()) {
case QEvent::GraphicsSceneMousePress:
case QEvent::GraphicsSceneMouseDoubleClick:
case QEvent::GraphicsSceneMouseMove:
case QEvent::GraphicsSceneMouseRelease:
globalPos = static_cast<QGraphicsSceneMouseEvent *>(event)->screenPos();
break;
case QEvent::MouseButtonPress:
case QEvent::MouseMove:
case QEvent::MouseButtonRelease:
globalPos = static_cast<QMouseEvent *>(event)->globalPos();
break;
default:
break;
}
if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonDblClick
|| event->type() == QEvent::GraphicsSceneMousePress || event->type() == QEvent::GraphicsSceneMouseDoubleClick) {
g->setHotSpot(globalPos);
g->setProperty("startPos", globalPos);
g->setProperty("pressed", QVariant::fromValue<bool>(true));
return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
} else if (event->type() == QEvent::MouseMove || event->type() == QEvent::GraphicsSceneMouseMove) {
if (g->property("pressed").toBool()) {
QPoint offset = 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 || event->type() == QEvent::GraphicsSceneMouseRelease) {
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));
QGestureRecognizer::reset(state);
}
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