tests/manual/gestures/graphicsview/gestures.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 00:43:10 +0200
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child 4 3b1da2848fc7
permissions -rw-r--r--
Revision: 201003 Kit: 201005
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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the test suite of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "gestures.h"
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#include <QTouchEvent>
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Qt::GestureType ThreeFingerSlideGesture::Type = Qt::CustomGesture;
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QGesture *ThreeFingerSlideGestureRecognizer::create(QObject *)
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{
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    return new ThreeFingerSlideGesture;
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}
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QGestureRecognizer::Result ThreeFingerSlideGestureRecognizer::recognize(QGesture *state, QObject *, QEvent *event)
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{
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    ThreeFingerSlideGesture *d = static_cast<ThreeFingerSlideGesture *>(state);
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    QGestureRecognizer::Result result;
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    switch (event->type()) {
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    case QEvent::TouchBegin:
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        result = QGestureRecognizer::MayBeGesture;
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    case QEvent::TouchEnd:
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        if (d->gestureFired)
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            result = QGestureRecognizer::FinishGesture;
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        else
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            result = QGestureRecognizer::CancelGesture;
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    case QEvent::TouchUpdate:
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        if (d->state() != Qt::NoGesture) {
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            QTouchEvent *ev = static_cast<QTouchEvent*>(event);
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            if (ev->touchPoints().size() == 3) {
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                d->gestureFired = true;
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                result = QGestureRecognizer::TriggerGesture;
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            } else {
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                result = QGestureRecognizer::MayBeGesture;
0
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                for (int i = 0; i < ev->touchPoints().size(); ++i) {
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                    const QTouchEvent::TouchPoint &pt = ev->touchPoints().at(i);
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                    const int distance = (pt.pos().toPoint() - pt.startPos().toPoint()).manhattanLength();
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                    if (distance > 20) {
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                        result = QGestureRecognizer::CancelGesture;
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                    }
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                }
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            }
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        } else {
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            result = QGestureRecognizer::CancelGesture;
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        }
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        break;
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    case QEvent::MouseButtonPress:
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    case QEvent::MouseButtonRelease:
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    case QEvent::MouseMove:
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        if (d->state() != Qt::NoGesture)
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            result = QGestureRecognizer::Ignore;
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        else
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            result = QGestureRecognizer::CancelGesture;
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        break;
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    default:
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        result = QGestureRecognizer::Ignore;
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        break;
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    }
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    return result;
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}
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void ThreeFingerSlideGestureRecognizer::reset(QGesture *state)
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{
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    static_cast<ThreeFingerSlideGesture *>(state)->gestureFired = false;
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    QGestureRecognizer::reset(state);
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}
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QGesture *RotateGestureRecognizer::create(QObject *)
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{
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    return new QGesture;
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}
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QGestureRecognizer::Result RotateGestureRecognizer::recognize(QGesture *, QObject *, QEvent *event)
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{
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    switch (event->type()) {
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    case QEvent::TouchBegin:
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    case QEvent::TouchEnd:
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    case QEvent::TouchUpdate:
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        break;
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    default:
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        break;
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    }
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    return QGestureRecognizer::Ignore;
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}
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void RotateGestureRecognizer::reset(QGesture *state)
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{
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    QGestureRecognizer::reset(state);
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}
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#include "moc_gestures.cpp"