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/****************************************************************************
**
** Copyright (C) 2011 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/qmultitouch_mac_p.h>
#include <qcursor.h>
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
QT_BEGIN_NAMESPACE
#ifdef QT_MAC_USE_COCOA
QHash<qint64, QCocoaTouch*> QCocoaTouch::_currentTouches;
QPointF QCocoaTouch::_screenReferencePos;
QPointF QCocoaTouch::_trackpadReferencePos;
int QCocoaTouch::_idAssignmentCount = 0;
int QCocoaTouch::_touchCount = 0;
bool QCocoaTouch::_updateInternalStateOnly = true;
QCocoaTouch::QCocoaTouch(NSTouch *nstouch)
{
if (_currentTouches.size() == 0)
_idAssignmentCount = 0;
_touchPoint.setId(_idAssignmentCount++);
_touchPoint.setPressure(1.0);
_identity = qint64([nstouch identity]);
_currentTouches.insert(_identity, this);
updateTouchData(nstouch, NSTouchPhaseBegan);
}
QCocoaTouch::~QCocoaTouch()
{
_currentTouches.remove(_identity);
}
void QCocoaTouch::updateTouchData(NSTouch *nstouch, NSTouchPhase phase)
{
if (_touchCount == 1)
_touchPoint.setState(toTouchPointState(phase) | Qt::TouchPointPrimary);
else
_touchPoint.setState(toTouchPointState(phase));
// From the normalized position on the trackpad, calculate
// where on screen the touchpoint should be according to the
// reference position:
NSPoint npos = [nstouch normalizedPosition];
QPointF qnpos = QPointF(npos.x, 1 - npos.y);
_touchPoint.setNormalizedPos(qnpos);
if (_touchPoint.id() == 0 && phase == NSTouchPhaseBegan) {
_trackpadReferencePos = qnpos;
_screenReferencePos = QCursor::pos();
}
NSSize dsize = [nstouch deviceSize];
float ppiX = (qnpos.x() - _trackpadReferencePos.x()) * dsize.width;
float ppiY = (qnpos.y() - _trackpadReferencePos.y()) * dsize.height;
QPointF relativePos = _trackpadReferencePos - QPointF(ppiX, ppiY);
_touchPoint.setScreenPos(_screenReferencePos - relativePos);
}
QCocoaTouch *QCocoaTouch::findQCocoaTouch(NSTouch *nstouch)
{
qint64 identity = qint64([nstouch identity]);
if (_currentTouches.contains(identity))
return _currentTouches.value(identity);
return 0;
}
Qt::TouchPointState QCocoaTouch::toTouchPointState(NSTouchPhase nsState)
{
Qt::TouchPointState qtState = Qt::TouchPointReleased;
switch (nsState) {
case NSTouchPhaseBegan:
qtState = Qt::TouchPointPressed;
break;
case NSTouchPhaseMoved:
qtState = Qt::TouchPointMoved;
break;
case NSTouchPhaseStationary:
qtState = Qt::TouchPointStationary;
break;
case NSTouchPhaseEnded:
case NSTouchPhaseCancelled:
qtState = Qt::TouchPointReleased;
break;
default:
break;
}
return qtState;
}
QList<QTouchEvent::TouchPoint>
QCocoaTouch::getCurrentTouchPointList(NSEvent *event, bool acceptSingleTouch)
{
QMap<int, QTouchEvent::TouchPoint> touchPoints;
NSSet *ended = [event touchesMatchingPhase:NSTouchPhaseEnded | NSTouchPhaseCancelled inView:nil];
NSSet *active = [event
touchesMatchingPhase:NSTouchPhaseBegan | NSTouchPhaseMoved | NSTouchPhaseStationary
inView:nil];
_touchCount = [active count];
// First: remove touches that were ended by the user. If we are
// currently not accepting single touches, a corresponding 'begin'
// has never been send to the app for these events.
// So should therefore not send the following removes either.
for (int i=0; i<int([ended count]); ++i) {
NSTouch *touch = [[ended allObjects] objectAtIndex:i];
QCocoaTouch *qcocoaTouch = findQCocoaTouch(touch);
if (qcocoaTouch) {
qcocoaTouch->updateTouchData(touch, [touch phase]);
if (!_updateInternalStateOnly)
touchPoints.insert(qcocoaTouch->_touchPoint.id(), qcocoaTouch->_touchPoint);
delete qcocoaTouch;
}
}
bool wasUpdateInternalStateOnly = _updateInternalStateOnly;
_updateInternalStateOnly = !acceptSingleTouch && _touchCount < 2;
// Next: update, or create, existing touches.
// We always keep track of all touch points, even
// when not accepting single touches.
for (int i=0; i<int([active count]); ++i) {
NSTouch *touch = [[active allObjects] objectAtIndex:i];
QCocoaTouch *qcocoaTouch = findQCocoaTouch(touch);
if (!qcocoaTouch)
qcocoaTouch = new QCocoaTouch(touch);
else
qcocoaTouch->updateTouchData(touch, wasUpdateInternalStateOnly ? NSTouchPhaseBegan : [touch phase]);
if (!_updateInternalStateOnly)
touchPoints.insert(qcocoaTouch->_touchPoint.id(), qcocoaTouch->_touchPoint);
}
// Next: sadly, we need to check that our touch hash is in
// sync with cocoa. This is typically not the case after a system
// gesture happend (like a four-finger-swipe to show expose).
if (_touchCount != _currentTouches.size()) {
// Remove all instances, and basically start from scratch:
touchPoints.clear();
foreach (QCocoaTouch *qcocoaTouch, _currentTouches.values()) {
if (!_updateInternalStateOnly) {
qcocoaTouch->_touchPoint.setState(Qt::TouchPointReleased);
touchPoints.insert(qcocoaTouch->_touchPoint.id(), qcocoaTouch->_touchPoint);
}
delete qcocoaTouch;
}
_currentTouches.clear();
_updateInternalStateOnly = !acceptSingleTouch;
return touchPoints.values();
}
// Finally: If this call _started_ to reject single
// touches, we need to fake a relase for the remaining
// touch now (and refake a begin for it later, if needed).
if (_updateInternalStateOnly && !wasUpdateInternalStateOnly && !_currentTouches.isEmpty()) {
QCocoaTouch *qcocoaTouch = _currentTouches.values().first();
qcocoaTouch->_touchPoint.setState(Qt::TouchPointReleased);
touchPoints.insert(qcocoaTouch->_touchPoint.id(), qcocoaTouch->_touchPoint);
// Since this last touch also will end up beeing the first
// touch (if the user adds a second finger without lifting
// the first), we promote it to be the primary touch:
qcocoaTouch->_touchPoint.setId(0);
_idAssignmentCount = 1;
}
return touchPoints.values();
}
#endif
QT_END_NAMESPACE
#endif // MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
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