src/gui/kernel/qmacgesturerecognizer_mac.mm
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 23:40:16 +0200
branchRCL_3
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parent 3 41300fa6a67c
child 33 3e2da88830cd
permissions -rw-r--r--
Revision: 201003 Kit: 201007
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/****************************************************************************
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**
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** Copyright (C) 2010 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 QtGui module 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 "qmacgesturerecognizer_mac_p.h"
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#include "qgesture.h"
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#include "qgesture_p.h"
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#include "qevent.h"
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#include "qevent_p.h"
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#include "qwidget.h"
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#include "qdebug.h"
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QT_BEGIN_NAMESPACE
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QMacSwipeGestureRecognizer::QMacSwipeGestureRecognizer()
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{
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}
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QGesture *QMacSwipeGestureRecognizer::create(QObject * /*target*/)
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{
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    return new QSwipeGesture;
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}
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QGestureRecognizer::Result
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QMacSwipeGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
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{
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    if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
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        QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
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        switch (ev->gestureType) {
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            case QNativeGestureEvent::Swipe: {
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                QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
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                g->setSwipeAngle(ev->angle);
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                return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
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                break; }
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            default:
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                break;
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        }
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    }
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    return QGestureRecognizer::Ignore;
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}
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void QMacSwipeGestureRecognizer::reset(QGesture *gesture)
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{
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    QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
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    g->setSwipeAngle(0);
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    QGestureRecognizer::reset(gesture);
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}
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////////////////////////////////////////////////////////////////////////
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QMacPinchGestureRecognizer::QMacPinchGestureRecognizer()
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{
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}
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QGesture *QMacPinchGestureRecognizer::create(QObject * /*target*/)
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{
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    return new QPinchGesture;
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}
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QGestureRecognizer::Result
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QMacPinchGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
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{
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    if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
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        QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
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        QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
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        switch(ev->gestureType) {
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        case QNativeGestureEvent::GestureBegin:
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            reset(gesture);
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            g->setStartCenterPoint(static_cast<QWidget*>(obj)->mapFromGlobal(ev->position));
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            g->setCenterPoint(g->startCenterPoint());
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            g->setChangeFlags(QPinchGesture::CenterPointChanged);
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            g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
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            return QGestureRecognizer::MayBeGesture | QGestureRecognizer::ConsumeEventHint;
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        case QNativeGestureEvent::Rotate: {
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            g->setLastScaleFactor(g->scaleFactor());
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            g->setLastRotationAngle(g->rotationAngle());
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            g->setRotationAngle(g->rotationAngle() + ev->percentage);
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            g->setChangeFlags(QPinchGesture::RotationAngleChanged);
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            g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
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            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
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        }
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        case QNativeGestureEvent::Zoom:
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            g->setLastScaleFactor(g->scaleFactor());
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            g->setLastRotationAngle(g->rotationAngle());
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            g->setScaleFactor(g->scaleFactor() * (1 + ev->percentage));
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            g->setChangeFlags(QPinchGesture::ScaleFactorChanged);
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            g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
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            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
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        case QNativeGestureEvent::GestureEnd:
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            return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
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        default:
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            break;
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        }
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    }
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    return QGestureRecognizer::Ignore;
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}
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void QMacPinchGestureRecognizer::reset(QGesture *gesture)
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{
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    QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
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    g->setChangeFlags(0);
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    g->setTotalChangeFlags(0);
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    g->setScaleFactor(1.0f);
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    g->setTotalScaleFactor(1.0f);
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    g->setLastScaleFactor(1.0f);
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    g->setRotationAngle(0.0f);
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    g->setTotalRotationAngle(0.0f);
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    g->setLastRotationAngle(0.0f);
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    g->setCenterPoint(QPointF());
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    g->setStartCenterPoint(QPointF());
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    g->setLastCenterPoint(QPointF());
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    QGestureRecognizer::reset(gesture);
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}
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////////////////////////////////////////////////////////////////////////
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#if defined(QT_MAC_USE_COCOA)
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QMacPanGestureRecognizer::QMacPanGestureRecognizer() : _panCanceled(true)
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{
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}
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3
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QGesture *QMacPanGestureRecognizer::create(QObject *target)
0
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{
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    if (!target)
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        return new QPanGesture;
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    if (QWidget *w = qobject_cast<QWidget *>(target)) {
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        w->setAttribute(Qt::WA_AcceptTouchEvents);
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        w->setAttribute(Qt::WA_TouchPadAcceptSingleTouchEvents);
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        return new QPanGesture;
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    }
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    return 0;
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}
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QGestureRecognizer::Result
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QMacPanGestureRecognizer::recognize(QGesture *gesture, QObject *target, QEvent *event)
0
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{
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    const int panBeginDelay = 300;
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    const int panBeginRadius = 3;
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    QPanGesture *g = static_cast<QPanGesture *>(gesture);
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    switch (event->type()) {
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    case QEvent::TouchBegin: {
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        const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
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        if (ev->touchPoints().size() == 1) {
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            reset(gesture);
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            _startPos = QCursor::pos();
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            _panTimer.start(panBeginDelay, target);
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            _panCanceled = false;
3
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            return QGestureRecognizer::MayBeGesture;
0
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        }
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        break;}
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    case QEvent::TouchEnd: {
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        if (_panCanceled)
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            break;
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        const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
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        if (ev->touchPoints().size() == 1)
3
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            return QGestureRecognizer::FinishGesture;
0
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        break;}
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    case QEvent::TouchUpdate: {
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        if (_panCanceled)
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            break;
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        const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
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        if (ev->touchPoints().size() == 1) {
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            if (_panTimer.isActive()) {
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                // INVARIANT: Still in maybeGesture. Check if the user
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                // moved his finger so much that it makes sense to cancel the pan:
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                const QPointF p = QCursor::pos();
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                if ((p - _startPos).manhattanLength() > panBeginRadius) {
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                    _panCanceled = true;
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                    _panTimer.stop();
3
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                    return QGestureRecognizer::CancelGesture;
0
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                }
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            } else {
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                const QPointF p = QCursor::pos();
3
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                const QPointF posOffset = p - _startPos;
0
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                g->setLastOffset(g->offset());
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                g->setOffset(QPointF(posOffset.x(), posOffset.y()));
3
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                return QGestureRecognizer::TriggerGesture;
0
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   223
            }
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   224
        } else if (_panTimer.isActive()) {
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            // I only want to cancel the pan if the user is pressing
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            // more than one finger, and the pan hasn't started yet:
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            _panCanceled = true;
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            _panTimer.stop();
3
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            return QGestureRecognizer::CancelGesture;
0
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   230
        }
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   231
        break;}
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   232
    case QEvent::Timer: {
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   233
        QTimerEvent *ev = static_cast<QTimerEvent *>(event);
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   234
        if (ev->timerId() == _panTimer.timerId()) {
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   235
            _panTimer.stop();
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diff changeset
   236
            if (_panCanceled)
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diff changeset
   237
                break;
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diff changeset
   238
            // Begin new pan session!
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   239
            _startPos = QCursor::pos();
3
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   240
            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
0
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diff changeset
   241
        }
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diff changeset
   242
        break; }
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diff changeset
   243
    default:
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   244
        break;
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   245
    }
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   246
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   247
    return QGestureRecognizer::Ignore;
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   248
}
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   249
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void QMacPanGestureRecognizer::reset(QGesture *gesture)
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   251
{
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   252
    QPanGesture *g = static_cast<QPanGesture *>(gesture);
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   253
    _startPos = QPointF();
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   254
    _panCanceled = true;
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   255
    g->setOffset(QPointF(0, 0));
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   256
    g->setLastOffset(QPointF(0, 0));
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diff changeset
   257
    g->setAcceleration(qreal(1));
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   258
    QGestureRecognizer::reset(gesture);
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   259
}
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#endif // QT_MAC_USE_COCOA
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QT_END_NAMESPACE