add new sensor gestures

Change-Id: Ided28e5d26af383b019d84ebb128c8ec6d6e3d34
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Lincoln Ramsay <lincoln.ramsay@nokia.com>

1 files changed, 178 insertions, 0 deletions

diff --git a/src/plugins/sensorgestures/qtsensors/qtwistsensorgesturerecognizer.cpp b/src/plugins/sensorgestures/qtsensors/qtwistsensorgesturerecognizer.cpp
new file mode 100644
index 00000000..e7a656f8
--- /dev/null
+++ b/src/plugins/sensorgestures/qtsensors/qtwistsensorgesturerecognizer.cpp
@@ -0,0 +1,178 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** 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 "qtwistsensorgesturerecognizer.h"
+
+#define _USE_MATH_DEFINES
+#include <QtCore/qmath.h>
+#ifndef M_PI
+#define M_PI 3.14159265358979323846264338327950288419717
+#endif
+#ifndef M_PI_2
+#define M_PI_2  1.57079632679489661923
+#endif
+
+QT_BEGIN_NAMESPACE
+
+// from qsensor2tilt
+inline qreal calcPitch(double Ax, double Ay, double Az)
+{
+    return (float)-atan2(Ax, sqrt(Ay * Ay + Az * Az));
+}
+
+inline qreal calcRoll(double Ax, double Ay, double Az)
+{
+    return (float)atan2(Ay, (sqrt(Ax * Ax + Az * Az)));
+}
+
+QTwistSensorGestureRecognizer::QTwistSensorGestureRecognizer(QObject *parent) :
+    QSensorGestureRecognizer(parent), detecting(0)
+{
+}
+
+QTwistSensorGestureRecognizer::~QTwistSensorGestureRecognizer()
+{
+}
+
+void QTwistSensorGestureRecognizer::create()
+{
+    accel = new QAccelerometer(this);
+    accel->connectToBackend();
+    timer = new QTimer(this);
+
+    qoutputrangelist outputranges = accel->outputRanges();
+
+    if (outputranges.count() > 0)
+        accelRange = (int)(outputranges.at(0).maximum *2);
+    else
+        accelRange = 44; //this should never happen
+
+    connect(timer,SIGNAL(timeout()),this,SLOT(timeout()));
+    timer->setSingleShot(true);
+    timer->setInterval(250);
+
+}
+
+QString QTwistSensorGestureRecognizer::id() const
+{
+    return QString("QtSensors.twist");
+}
+
+bool QTwistSensorGestureRecognizer::start()
+{
+    connect(accel,SIGNAL(readingChanged()),this,SLOT(accelChanged()));
+    active = accel->start();
+    return active;
+}
+
+bool QTwistSensorGestureRecognizer::stop()
+{
+    accel->stop();
+    disconnect(accel,SIGNAL(readingChanged()),this,SLOT(accelChanged()));
+
+    active = accel->isActive();
+    return !active;
+}
+
+bool QTwistSensorGestureRecognizer::isActive()
+{
+    return active;
+}
+
+#define RESTING_VARIANCE 10
+
+void QTwistSensorGestureRecognizer::accelChanged()
+{
+    qreal x = accel->reading()->x();
+    qreal y = accel->reading()->y();
+    qreal z = accel->reading()->z();
+
+    pitch = calcPitch(x, y, z);
+    roll = calcRoll(x, y, z);
+
+    qreal degrees = calc(pitch);
+
+    if (xList.count() > 4) {
+
+        if (detecting && abs(degrees) < RESTING_VARIANCE) {
+            if (lastX < 0) {
+                Q_EMIT twistLeft();
+                Q_EMIT detected("twistLeft");
+            } else {
+                Q_EMIT twistRight();
+                Q_EMIT detected("twistRight");
+            }
+            detecting = false;
+        }
+
+        if (abs(degrees) > 60 && abs(xList.last()) < RESTING_VARIANCE) {
+            detecting = true;
+            timer->start();
+            lastX = degrees;
+        }
+    }
+
+    if (xList.count() > 5)
+        xList.removeLast();
+    xList.insert(0,degrees);
+}
+
+void QTwistSensorGestureRecognizer::timeout()
+{
+    detecting = false;
+}
+
+qreal QTwistSensorGestureRecognizer::calc(qreal yrot)
+{
+    qreal aG = 1 * sin(yrot);
+    qreal aK = 1 * cos(yrot);
+
+    yrot = atan2(aG, aK);
+    if (yrot > M_PI_2)
+        yrot = M_PI - yrot;
+    else if (yrot < -M_PI_2)
+        yrot = -(M_PI + yrot);
+
+    return yrot * 180 / M_PI;
+}
+
+QT_END_NAMESPACE