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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the Qt Mobility Components. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "freefallform.h" |
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43 |
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44 const int KTreshold = 2; |
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45 |
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46 FreeFallForm::FreeFallForm(QWidget *parent) |
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47 : QWidget(parent) |
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48 { |
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49 setupUi(this); |
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50 dropItLabel->setText(""); |
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51 |
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52 m_accelerationSensor.addFilter(this); |
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53 m_accelerationSensor.start(); |
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54 m_freeFallState = StateNotStarted; |
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55 } |
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56 |
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57 void FreeFallForm::on_setupButton_clicked() |
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58 { |
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59 setupButton->setDisabled(true); |
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60 dropItLabel->setText("Drop it!"); |
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61 freeFallTimeLabel->setText("-"); |
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62 freeFallHeightLabel->setText("-"); |
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63 m_freeFallState = StateSetup; |
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64 } |
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65 |
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66 bool FreeFallForm::filter(QAccelerometerReading *reading) |
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67 { |
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68 switch (m_freeFallState) { |
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69 case StateSetup: |
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70 if (abs(reading->x()) < KTreshold && abs(reading->y()) < KTreshold && abs(reading->z()) < KTreshold) { |
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71 m_freeFallTimer.start(); |
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72 m_freeFallState = StateFalling; |
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73 } |
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74 break; |
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75 case StateFalling: |
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76 if (abs(reading->x()) > KTreshold || abs(reading->y()) > KTreshold || abs(reading->z()) > KTreshold) { |
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77 freeFallTimeLabel->setNum(m_freeFallTimer.elapsed()); |
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78 qreal t = (qreal(m_freeFallTimer.elapsed()) / 1000); |
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79 freeFallHeightLabel->setNum(9.81 / 2 * t * t); |
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80 m_freeFallState = StateNotStarted; |
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81 setupButton->setEnabled(true); |
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82 setupButton->setFocus(); |
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83 dropItLabel->setText(""); |
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84 } |
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85 break; |
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86 default: |
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87 break; |
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88 } |
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89 |
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90 return false; |
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91 } |