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1 /* |
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2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Gesture recognition utilities |
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15 * |
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16 */ |
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17 |
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18 |
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19 #include "qstmutils.h" |
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20 #include "qstmgesturedefs.h" |
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21 |
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22 using namespace qstmUiEventEngine; |
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23 |
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24 inline int QStm_Utils::longerEdge( const QSize& size ) |
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25 { |
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26 return MAX( size.height(), size.width() ); |
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27 } |
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28 |
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29 |
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30 QRect QStm_Utils::toleranceRectMm( const QPoint& centerPoint, int size_mm ) |
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31 { |
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32 long toleranceLength = mm2Pixels(size_mm) / 2; |
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33 return toleranceRectPx(centerPoint, toleranceLength); |
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34 } |
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35 |
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36 QRect QStm_Utils::toleranceRectPx( const QPoint& centerPoint, int size_px ) |
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37 { |
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38 QRect toleranceRect( QPoint(0,0), QSize(size_px, size_px) ); |
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39 // grow by the tolerance length, while keeping the center point |
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40 toleranceRect.moveCenter(centerPoint); |
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41 return toleranceRect; |
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42 } |
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43 |
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44 |
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45 long QStm_Utils::mm2Pixels(long mm) |
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46 { |
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47 //return Twips2Pixels(mm * KTwipsInMm); |
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48 return mm * QApplication::desktop()->height() / QApplication::desktop()->heightMM(); |
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49 } |
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50 |
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51 long QStm_Utils::inches2Pixels(double inches) |
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52 { |
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53 //return Twips2Pixels(inches * KTwipsInInch); |
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54 return inches * 25.4 * QApplication::desktop()->height() / QApplication::desktop()->heightMM(); |
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55 } |
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56 |
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57 int QStm_Utils::distance(const QPoint& p1, const QPoint& p2) |
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58 { |
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59 /* |
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60 double d = dx * dx + dy * dy; |
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61 double dist ; |
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62 Math::Sqrt(dist, d) ; |
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63 return dist; |
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64 */ |
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65 QPoint diff = p1 - p2; |
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66 int x = diff.x(); |
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67 int y = diff.y(); |
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68 |
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69 if(x<0) x=-x; |
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70 if(y<0) y=-y; |
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71 if(x < y) { |
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72 int t = x; |
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73 x = y; |
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74 y = t; // ensures that x >= y |
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75 } |
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76 int dist = (y < ((13107 * x)>>15)) ? // * (.4) |
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77 (x + ((y * 6310)>>15)) : // * (.192582403) |
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78 (((x * 27926)>>15) // * (.852245894) |
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79 + ((y * 18414)>>15)); // * (.561967668) |
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80 return dist; |
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81 } |
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82 |
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83 |
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84 qreal QStm_Utils::distanceF(const QPoint& p1, const QPoint& p2) |
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85 { |
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86 QPoint diff = p1 - p2; |
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87 double dist; |
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88 SQRT(dist, ((qreal)(diff.x() * diff.x() + diff.y() * diff.y()))) ; |
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89 return dist; |
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90 } |
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91 |