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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 QtGui module 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 "private/qwinnativepangesturerecognizer_win_p.h"
#include "qevent.h"
#include "qgraphicsitem.h"
#include "qgesture.h"
#include "private/qgesture_p.h"
#include "private/qevent_p.h"
#include "private/qapplication_p.h"
#include "private/qwidget_p.h"
QT_BEGIN_NAMESPACE
QWinNativePanGestureRecognizer::QWinNativePanGestureRecognizer()
{
}
QGesture* QWinNativePanGestureRecognizer::createGesture(QObject *target) const
{
if (!target)
return new QPanGesture; // a special case
if (qobject_cast<QGraphicsObject*>(target))
return 0;
if (!target->isWidgetType())
return 0;
QWidget *q = static_cast<QWidget*>(target);
QWidgetPrivate *d = q->d_func();
d->nativeGesturePanEnabled = true;
d->winSetupGestures();
return new QPanGesture;
}
QGestureRecognizer::Result QWinNativePanGestureRecognizer::filterEvent(QGesture *state, QObject *, QEvent *event)
{
QPanGesture *q = static_cast<QPanGesture*>(state);
QPanGesturePrivate *d = q->d_func();
QGestureRecognizer::Result result = QGestureRecognizer::Ignore;
if (event->type() == QEvent::NativeGesture) {
QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
switch(ev->gestureType) {
case QNativeGestureEvent::GestureBegin:
break;
case QNativeGestureEvent::Pan:
result = QGestureRecognizer::GestureTriggered;
event->accept();
break;
case QNativeGestureEvent::GestureEnd:
if (q->state() == Qt::NoGesture)
return QGestureRecognizer::Ignore; // some other gesture has ended
result = QGestureRecognizer::GestureFinished;
break;
default:
return QGestureRecognizer::Ignore;
}
if (q->state() == Qt::NoGesture) {
d->lastOffset = d->totalOffset = d->offset = QPointF();
} else {
d->lastOffset = d->offset;
d->offset = QPointF(ev->position.x() - d->lastPosition.x(),
ev->position.y() - d->lastPosition.y());
d->totalOffset += d->offset;
}
d->lastPosition = ev->position;
}
return result;
}
void QWinNativePanGestureRecognizer::reset(QGesture *state)
{
QPanGesture *pan = static_cast<QPanGesture*>(state);
QPanGesturePrivate *d = pan->d_func();
d->totalOffset = d->lastOffset = d->offset = QPointF();
d->lastPosition = QPoint();
d->acceleration = 0;
QGestureRecognizer::reset(state);
}
QT_END_NAMESPACE
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