Add support for the compass sensor

Change-Id: Ia3c49b6d991439eba06537938198ed682f23065d
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>
Reviewed-by: Lincoln Ramsay <lincoln.ramsay@nokia.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/src/plugins/sensors/blackberry/bbcompass.cpp b/src/plugins/sensors/blackberry/bbcompass.cpp
new file mode 100644
index 00000000..a77c99ad
--- /dev/null
+++ b/src/plugins/sensors/blackberry/bbcompass.cpp
@@ -0,0 +1,79 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Research In Motion
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtSensors module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "bbcompass.h"
+
+BbCompass::BbCompass(QSensor *sensor)
+    : BbSensorBackend<QCompassReading>(devicePath(), SENSOR_TYPE_AZIMUTH_PITCH_ROLL, sensor)
+{
+    setDescription(QLatin1String("Azimuth in degrees from magnetic north"));
+}
+
+bool BbCompass::updateReadingFromEvent(const sensor_event_t &event, QCompassReading *reading)
+{
+    reading->setAzimuth(event.apr.azimuth);
+
+    switch (event.accuracy) {
+    case SENSOR_ACCURACY_UNRELIABLE:
+        reading->setCalibrationLevel(0.0f);
+        break;
+    case SENSOR_ACCURACY_LOW:
+        reading->setCalibrationLevel(0.1f);
+        break;
+
+    // We determined that MEDIUM should map to 1.0, because existing code samples
+    // show users should pop a calibration screen when seeing < 1.0. The MEDIUM accuracy
+    // is actually good enough not to require calibration, so we don't want to make it seem
+    // like it is required artificially.
+    case SENSOR_ACCURACY_MEDIUM:
+        reading->setCalibrationLevel(1.0f);
+        break;
+    case SENSOR_ACCURACY_HIGH:
+        reading->setCalibrationLevel(1.0f);
+        break;
+    }
+
+    return true;
+}
+
+QString BbCompass::devicePath()
+{
+    return QLatin1String("/dev/sensor/apr");
+}