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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtSensors module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#import <UIKit/UIDevice.h>
#include "iosproximitysensor.h"
char const * const IOSProximitySensor::id("ios.proximitysensor");
QT_BEGIN_NAMESPACE
int IOSProximitySensor::s_startCount = 0;
@interface ProximitySensorCallback : NSObject
{
IOSProximitySensor *m_iosProximitySensor;
}
@end
@implementation ProximitySensorCallback
- (id)initWithQIOSProximitySensor:(IOSProximitySensor *)iosProximitySensor
{
self = [super init];
if (self) {
m_iosProximitySensor = iosProximitySensor;
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(proximityChanged:)
name:@"UIDeviceProximityStateDidChangeNotification" object:nil];
}
return self;
}
-(void) dealloc
{
[[NSNotificationCenter defaultCenter]
removeObserver:self
name:@"UIDeviceProximityStateDidChangeNotification" object:nil];
[super dealloc];
}
- (void)proximityChanged:(NSNotificationCenter *)notification
{
Q_UNUSED(notification);
bool close = [[UIDevice currentDevice] proximityState] == YES;
m_iosProximitySensor->proximityChanged(close);
}
@end
bool IOSProximitySensor::available()
{
UIDevice *device = [UIDevice currentDevice];
if (device.proximityMonitoringEnabled)
return true;
// According to the docs, you need to switch it on and
// re-read the property to check if it is available:
device.proximityMonitoringEnabled = YES;
bool available = device.proximityMonitoringEnabled;
device.proximityMonitoringEnabled = NO;
return available;
}
IOSProximitySensor::IOSProximitySensor(QSensor *sensor)
: QSensorBackend(sensor)
, m_proximitySensorCallback(0)
{
setReading<QProximityReading>(&m_reading);
}
IOSProximitySensor::~IOSProximitySensor()
{
[m_proximitySensorCallback release];
}
void IOSProximitySensor::start()
{
if (m_proximitySensorCallback)
return;
m_proximitySensorCallback = [[ProximitySensorCallback alloc] initWithQIOSProximitySensor:this];
if (++s_startCount == 1)
[UIDevice currentDevice].proximityMonitoringEnabled = YES;
}
void IOSProximitySensor::proximityChanged(bool close)
{
m_reading.setClose(close);
m_reading.setTimestamp(quint64([[NSDate date] timeIntervalSinceReferenceDate] * 1e6));
newReadingAvailable();
}
void IOSProximitySensor::stop()
{
if (!m_proximitySensorCallback)
return;
[m_proximitySensorCallback release];
m_proximitySensorCallback = 0;
if (--s_startCount == 0)
[UIDevice currentDevice].proximityMonitoringEnabled = NO;
}
QT_END_NAMESPACE
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