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/****************************************************************************
**
** 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 demonstration applications 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 "tapgesturerecognizer.h"
void TapGestureRecognizer::registerRecognizer()
{
QGestureRecognizer::registerRecognizer(new TapGestureRecognizer);
}
TapGestureRecognizer::TapGestureRecognizer()
{
}
QGesture *TapGestureRecognizer::create(QObject *)
{
return new QTapGesture;
}
QGestureRecognizer::Result TapGestureRecognizer::recognize(QGesture *state, QObject *watched,
QEvent *event)
{
QGraphicsSceneMouseEvent *ev = static_cast<QGraphicsSceneMouseEvent *>(event);
switch(event->type()) {
case QEvent::GraphicsSceneMousePress:
if (!(ev->modifiers() & Qt::ControlModifier)) {
state->setProperty("position", ev->screenPos());
state->setHotSpot(ev->screenPos());
state->setHandled(false);
event->accept();
return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
} else
return QGestureRecognizer::Ignore;
case QEvent::GraphicsSceneMouseMove:
return QGestureRecognizer::Ignore;
case QEvent::GraphicsSceneMouseRelease:
qDebug() << "Mouse release: " << state->state();
if (state->state() != Qt::GestureStarted) {
return QGestureRecognizer::CancelGesture;
} else if (state->state() != Qt::GestureCanceled) {
return QGestureRecognizer::FinishGesture;
}
return QGestureRecognizer::Ignore;
case QEvent::Gesture: {
QGestureEvent *ge = static_cast<QGestureEvent *>(event);
QGesture *tap = ge->gesture(Qt::TapGesture);
QGesture *pan = ge->gesture(Qt::PanGesture);
qDebug() << "got a gesture" << tap << (tap ? tap->state() : 0)
<< ", " << pan << (pan ? pan->state() : 0);
if (ge->gesture(Qt::PanGesture)) {
return QGestureRecognizer::CancelGesture;
}
if (ge->gesture(Qt::TapAndHoldGesture))
return QGestureRecognizer::CancelGesture;
}
return QGestureRecognizer::Ignore;
default:
break;
}
return QGestureRecognizer::Ignore;
}
void TapGestureRecognizer::reset(QGesture *q)
{
q->setProperty("position", QPointF());
}
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