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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 "qmacgesturerecognizer_mac_p.h"
#include "qgesture.h"
#include "qgesture_p.h"
#include "qevent.h"
#include "qevent_p.h"
#include "qwidget.h"
#include "qdebug.h"
QT_BEGIN_NAMESPACE
QMacSwipeGestureRecognizer::QMacSwipeGestureRecognizer()
{
}
QGesture *QMacSwipeGestureRecognizer::create(QObject * /*target*/)
{
return new QSwipeGesture;
}
QGestureRecognizer::Result
QMacSwipeGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
{
if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
switch (ev->gestureType) {
case QNativeGestureEvent::Swipe: {
QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
g->setSwipeAngle(ev->angle);
return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
break; }
default:
break;
}
}
return QGestureRecognizer::Ignore;
}
void QMacSwipeGestureRecognizer::reset(QGesture *gesture)
{
QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
g->setSwipeAngle(0);
QGestureRecognizer::reset(gesture);
}
////////////////////////////////////////////////////////////////////////
QMacPinchGestureRecognizer::QMacPinchGestureRecognizer()
{
}
QGesture *QMacPinchGestureRecognizer::create(QObject * /*target*/)
{
return new QPinchGesture;
}
QGestureRecognizer::Result
QMacPinchGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
{
if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
switch(ev->gestureType) {
case QNativeGestureEvent::GestureBegin:
reset(gesture);
g->setStartCenterPoint(static_cast<QWidget*>(obj)->mapFromGlobal(ev->position));
g->setCenterPoint(g->startCenterPoint());
g->setChangeFlags(QPinchGesture::CenterPointChanged);
g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
return QGestureRecognizer::MayBeGesture | QGestureRecognizer::ConsumeEventHint;
case QNativeGestureEvent::Rotate: {
g->setLastScaleFactor(g->scaleFactor());
g->setLastRotationAngle(g->rotationAngle());
g->setRotationAngle(g->rotationAngle() + ev->percentage);
g->setChangeFlags(QPinchGesture::RotationAngleChanged);
g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
}
case QNativeGestureEvent::Zoom:
g->setLastScaleFactor(g->scaleFactor());
g->setLastRotationAngle(g->rotationAngle());
g->setScaleFactor(g->scaleFactor() * (1 + ev->percentage));
g->setChangeFlags(QPinchGesture::ScaleFactorChanged);
g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
case QNativeGestureEvent::GestureEnd:
return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
default:
break;
}
}
return QGestureRecognizer::Ignore;
}
void QMacPinchGestureRecognizer::reset(QGesture *gesture)
{
QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
g->setChangeFlags(0);
g->setTotalChangeFlags(0);
g->setScaleFactor(1.0f);
g->setTotalScaleFactor(1.0f);
g->setLastScaleFactor(1.0f);
g->setRotationAngle(0.0f);
g->setTotalRotationAngle(0.0f);
g->setLastRotationAngle(0.0f);
g->setCenterPoint(QPointF());
g->setStartCenterPoint(QPointF());
g->setLastCenterPoint(QPointF());
QGestureRecognizer::reset(gesture);
}
////////////////////////////////////////////////////////////////////////
#if defined(QT_MAC_USE_COCOA)
QMacPanGestureRecognizer::QMacPanGestureRecognizer() : _panCanceled(true)
{
}
QGesture *QMacPanGestureRecognizer::create(QObject *target)
{
if (!target)
return new QPanGesture;
if (QWidget *w = qobject_cast<QWidget *>(target)) {
w->setAttribute(Qt::WA_AcceptTouchEvents);
w->setAttribute(Qt::WA_TouchPadAcceptSingleTouchEvents);
return new QPanGesture;
}
return 0;
}
QGestureRecognizer::Result
QMacPanGestureRecognizer::recognize(QGesture *gesture, QObject *target, QEvent *event)
{
const int panBeginDelay = 300;
const int panBeginRadius = 3;
QPanGesture *g = static_cast<QPanGesture *>(gesture);
switch (event->type()) {
case QEvent::TouchBegin: {
const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
if (ev->touchPoints().size() == 1) {
reset(gesture);
_startPos = QCursor::pos();
_panTimer.start(panBeginDelay, target);
_panCanceled = false;
return QGestureRecognizer::MayBeGesture;
}
break;}
case QEvent::TouchEnd: {
if (_panCanceled)
break;
const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
if (ev->touchPoints().size() == 1)
return QGestureRecognizer::FinishGesture;
break;}
case QEvent::TouchUpdate: {
if (_panCanceled)
break;
const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
if (ev->touchPoints().size() == 1) {
if (_panTimer.isActive()) {
// INVARIANT: Still in maybeGesture. Check if the user
// moved his finger so much that it makes sense to cancel the pan:
const QPointF p = QCursor::pos();
if ((p - _startPos).manhattanLength() > panBeginRadius) {
_panCanceled = true;
_panTimer.stop();
return QGestureRecognizer::CancelGesture;
}
} else {
const QPointF p = QCursor::pos();
const QPointF posOffset = p - _startPos;
g->setLastOffset(g->offset());
g->setOffset(QPointF(posOffset.x(), posOffset.y()));
return QGestureRecognizer::TriggerGesture;
}
} else if (_panTimer.isActive()) {
// I only want to cancel the pan if the user is pressing
// more than one finger, and the pan hasn't started yet:
_panCanceled = true;
_panTimer.stop();
return QGestureRecognizer::CancelGesture;
}
break;}
case QEvent::Timer: {
QTimerEvent *ev = static_cast<QTimerEvent *>(event);
if (ev->timerId() == _panTimer.timerId()) {
_panTimer.stop();
if (_panCanceled)
break;
// Begin new pan session!
_startPos = QCursor::pos();
return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
}
break; }
default:
break;
}
return QGestureRecognizer::Ignore;
}
void QMacPanGestureRecognizer::reset(QGesture *gesture)
{
QPanGesture *g = static_cast<QPanGesture *>(gesture);
_startPos = QPointF();
_panCanceled = true;
g->setOffset(QPointF(0, 0));
g->setLastOffset(QPointF(0, 0));
g->setAcceleration(qreal(1));
QGestureRecognizer::reset(gesture);
}
#endif // QT_MAC_USE_COCOA
QT_END_NAMESPACE
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