Qt Reference Documentation

screenorientation.js Example File

declarative/screenorientation/Core/screenorientation.js
 /****************************************************************************
 **
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtDeclarative module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 ** 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 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
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 ****************************************************************************/

 function printOrientation(orientation) {
     var orientationString;
     if (orientation == Orientation.Portrait) {
         orientationString = "Portrait";
     } else if (orientation == Orientation.Landscape) {
         orientationString = "Landscape";
     } else if (orientation == Orientation.PortraitInverted) {
         orientationString = "Portrait inverted";
     } else if (orientation == Orientation.LandscapeInverted) {
         orientationString = "Landscape inverted";
     } else {
         orientationString = "UnknownOrientation";
     }
     return orientationString;
 }

 function getAngle(orientation) {
     var angle;
     if (orientation == Orientation.Portrait) {
         angle = 0;
     } else if (orientation == Orientation.Landscape) {
         angle = 90;
     } else if (orientation == Orientation.PortraitInverted) {
         angle = 180;
     } else if (orientation == Orientation.LandscapeInverted) {
         angle = 270;
     } else {
         angle = 0;
     }
     return angle;
 }

 function parallel(firstOrientation, secondOrientation) {
     var difference = getAngle(firstOrientation) - getAngle(secondOrientation)
     return difference % 180 == 0;
 }

 function calculateGravityPoint(firstOrientation, secondOrientation) {
     var position = Qt.point(0, 0);
     var difference = getAngle(firstOrientation) - getAngle(secondOrientation)
     if (difference < 0) {
         difference = 360 + difference;
     }
     if (difference == 0) {
         position = Qt.point(0, -10);
     } else if (difference == 90) {
         position = Qt.point(-10, 0);
     } else if (difference == 180) {
         position = Qt.point(0, 1000);
     } else if (difference == 270) {
         position = Qt.point(1000, 0);
     }
     return position;
 }
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