--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/camerauis/cameraxui/cxengine/src/sensor/xqdeviceorientation_p.cpp	Fri Apr 16 14:51:30 2010 +0300
@@ -0,0 +1,203 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+#include "xqdeviceorientation_p.h"
+#include <e32math.h>
+
+const TInt KDefaultResolution = 15;
+
+XQDeviceOrientationPrivate::XQDeviceOrientationPrivate(
+        XQDeviceOrientation& qq) : q(qq), iResolution(KDefaultResolution)
+{
+    iXRotation = 0;
+    iYRotation = 0;
+    iZRotation = 0;
+}
+
+XQDeviceOrientationPrivate::~XQDeviceOrientationPrivate()
+{
+    close();
+}
+
+void XQDeviceOrientationPrivate::open()
+{
+    iAccelerationSensor.addFilter(*this);
+    iAccelerationSensor.addFilter(iAccelerationPostFilter);
+
+    iAccelerationSensor.open();
+    iAccelerationSensor.startReceiving();
+}
+
+void XQDeviceOrientationPrivate::close()
+{
+    iAccelerationSensor.stopReceiving();
+    iAccelerationSensor.close();
+    iAccelerationSensor.filters().removeOne(this);
+}
+
+void XQDeviceOrientationPrivate::setResolution(TInt resolution)
+{
+    iResolution = resolution;
+}
+
+TInt XQDeviceOrientationPrivate::resolution() const
+{
+    return iResolution;
+}
+
+int XQDeviceOrientationPrivate::xRotation() const
+{
+    return iXRotation;
+}
+
+int XQDeviceOrientationPrivate::yRotation() const
+{
+    return iYRotation;
+}
+
+int XQDeviceOrientationPrivate::zRotation() const
+{
+    return iZRotation;
+}
+
+XQDeviceOrientation::DisplayOrientation
+        XQDeviceOrientationPrivate::orientation() const
+{
+    return iOrientation;
+}
+
+bool XQDeviceOrientationPrivate::filter(int& xAcceleration, 
+    int& yAcceleration, int& zAcceleration)
+{
+    TReal xAcc = xAcceleration;
+    TReal yAcc = yAcceleration;
+    TReal zAcc = zAcceleration;
+
+    TReal angle = 0;
+
+    //axis X rotation
+    if (yAcc != 0) {
+        Math::ATan(angle, Abs(zAcc / yAcc));
+        angle *= 180 / KPi;  //rad to degrees
+        if (zAcc > 0 && yAcc > 0) {
+            //do nothing
+        } else if (zAcc > 0 && yAcc < 0) {
+            angle = 90 + (90 - angle);
+        } else if (zAcc < 0 && yAcc < 0) {
+            angle += 180;
+        } else {
+            angle = 270 + (90 - angle);
+        }
+    } else {
+        if (zAcceleration > 0) {
+            angle = 90;
+        } else {
+            angle = 270;
+        }
+    }
+    TInt xRotation = RoundAngle(angle);
+
+    //axis Y rotation
+    if (xAcc != 0) {
+        Math::ATan(angle, Abs(zAcc / xAcc));
+        angle *= 180 / KPi;  //rad to degrees
+        if (zAcc > 0 && xAcc > 0) {
+            angle += 90;
+        } else if (zAcc > 0 && xAcc < 0) {
+            angle = 270 - angle;
+        } else if (zAcc < 0 && xAcc < 0) {
+            angle += 270;
+        } else {
+            angle = 90 - angle;
+        }
+    } else {
+        if (zAcceleration > 0) {
+            angle = 180;
+        } else {
+            angle = 0;
+        }
+    }
+    TInt yRotation = RoundAngle(angle);
+
+    //axis Z rotation
+    if (yAcc != 0) {
+        Math::ATan(angle, Abs(xAcc / yAcc));
+        angle *= 180 / KPi;  //rad to degrees
+        if (xAcc > 0 && yAcc > 0) {
+            angle = 360 - angle;
+        } else if (xAcc > 0 && yAcc < 0) {
+            angle += 180;
+        } else if (xAcc <= 0 && yAcc <= 0) {
+            angle = 180 - angle;
+        } else {
+            //Do nothing
+        }
+    } else {
+        if (xAcceleration > 0) {
+            angle = 270;
+        } else {
+            angle = 90;
+        }
+    }
+    TInt zRotation = RoundAngle(angle);
+
+    iXRotation = xRotation;
+    iYRotation = yRotation;
+    iZRotation = zRotation;
+
+    XQDeviceOrientation::DisplayOrientation orientation =
+            XQDeviceOrientation::OrientationUndefined;
+    if (((315 < xRotation && xRotation < 360) ||
+            (0 <= xRotation && xRotation <= 45)) &&
+         ((315 < zRotation && zRotation < 360) ||
+            (0 <= zRotation && zRotation <= 45))) {
+        orientation = XQDeviceOrientation::OrientationDisplayUp;
+    } else if (135 < xRotation && xRotation <= 225 && 135 < zRotation &&
+            zRotation <= 225) {
+        orientation = XQDeviceOrientation::OrientationDisplayDown;
+    } else if (225 < yRotation && yRotation <= 315 && 45 < zRotation &&
+            zRotation <= 135) {
+        orientation = XQDeviceOrientation::OrientationDisplayLeftUp;
+    } else if (45 < yRotation && yRotation <= 135 && 225 < zRotation &&
+            zRotation <= 315) {
+        orientation = XQDeviceOrientation::OrientationDisplayRightUp;
+    } else if (45 < xRotation && xRotation <= 135 && 135 < yRotation &&
+            yRotation <= 225) {
+        orientation = XQDeviceOrientation::OrientationDisplayUpwards;
+    } else if (225 < xRotation && xRotation <= 315 &&
+        ((315 < yRotation && yRotation < 360) || (0 <= yRotation &&
+            yRotation <= 45))) {
+        orientation = XQDeviceOrientation::OrientationDisplayDownwards;
+    }
+
+    emit q.rotationChanged(xRotation, yRotation, zRotation);
+
+    if (orientation != iOrientation) {
+        if (orientation != XQDeviceOrientation::OrientationUndefined) {
+            emit q.orientationChanged(orientation);
+        }
+        iOrientation = orientation;
+    }
+
+    return false;
+}
+
+TInt XQDeviceOrientationPrivate::RoundAngle(TReal aAngle) const
+{
+    return ((TInt(aAngle) + iResolution / 2) / iResolution * iResolution) % 360;
+}
+
+// End of file