Qt 4.8: screenorientation.js Example File (declarative/screenorientation/Core/screenorientation.js)

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# screenorientation.js Example File

declarative/screenorientation/Core/screenorientation.js

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
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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;
     }