Add iio-sensor-proxy backend

iio-sensor-proxy is a daemon that listens to sensors on IIO
subsystem on Linux and provides access to the sensor readings
over D-Bus. Currently it provides only orientation and ambient-
light level.

https://github.com/hadess/iio-sensor-proxy

Change-Id: I035bda0b43a16552a9f2bd88a064e53d5f105451
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>

1 files changed, 94 insertions, 0 deletions

diff --git a/src/plugins/sensors/iio-sensor-proxy/iiosensorproxylightsensor.cpp b/src/plugins/sensors/iio-sensor-proxy/iiosensorproxylightsensor.cpp
new file mode 100644
index 00000000..38bce633
--- /dev/null
+++ b/src/plugins/sensors/iio-sensor-proxy/iiosensorproxylightsensor.cpp
@@ -0,0 +1,94 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Alexander Volkov <a.volkov@rusbitech.ru>
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtSensors module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "iiosensorproxylightsensor.h"
+#include "sensorproxy_interface.h"
+
+#include <QtDBus/QDBusPendingReply>
+
+char const * const IIOSensorProxyLightSensor::id("iio-sensor-proxy.lightsensor");
+
+static inline QString dbusPath() { return QStringLiteral("/net/hadess/SensorProxy"); }
+
+IIOSensorProxyLightSensor::IIOSensorProxyLightSensor(QSensor *sensor)
+    : IIOSensorProxySensorBase(dbusPath(), NetHadessSensorProxyInterface::staticInterfaceName(), sensor)
+{
+    setReading<QLightReading>(&m_reading);
+    m_sensorProxyInterface = new NetHadessSensorProxyInterface(serviceName(), dbusPath(),
+                                                               QDBusConnection::systemBus(), this);
+}
+
+IIOSensorProxyLightSensor::~IIOSensorProxyLightSensor()
+{
+}
+
+void IIOSensorProxyLightSensor::start()
+{
+    if (isServiceRunning()) {
+        if (m_sensorProxyInterface->hasAmbientLight()
+            && m_sensorProxyInterface->lightLevelUnit() == QLatin1String("lux")) {
+            QDBusPendingReply<> reply = m_sensorProxyInterface->ClaimLight();
+            reply.waitForFinished();
+            if (!reply.isError()) {
+                updateLightLevel(m_sensorProxyInterface->lightLevel());
+                return;
+            }
+        }
+    }
+    sensorStopped();
+}
+
+void IIOSensorProxyLightSensor::stop()
+{
+    if (isServiceRunning()) {
+        QDBusPendingReply<> reply = m_sensorProxyInterface->ReleaseLight();
+        reply.waitForFinished();
+    }
+    sensorStopped();
+}
+
+void IIOSensorProxyLightSensor::updateProperties(const QVariantMap &changedProperties)
+{
+    if (changedProperties.contains("LightLevel")) {
+        double lux = changedProperties.value("LightLevel").toDouble();
+        updateLightLevel(lux);
+    }
+}
+
+void IIOSensorProxyLightSensor::updateLightLevel(double lux)
+{
+    m_reading.setLux(lux);
+    m_reading.setTimestamp(produceTimestamp());
+    newReadingAvailable();
+}