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1 /* |
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2 * Copyright (c) 2009 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 the License "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: |
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15 * |
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16 */ |
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17 /* |
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18 * gestureeventfilter.cpp |
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19 * |
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20 * Created on: Jan 22, 2009 |
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21 * Author: tyutyuni |
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22 */ |
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23 |
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24 #include "gesturedefs.h" |
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25 #include "gestureeventfilter.h" |
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26 |
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27 |
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28 using namespace RT_GestureHelper; |
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29 |
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30 CGestureEventFilter::CGestureEventFilter(TInt aTapSize):iTapSize(aTapSize) |
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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 CGestureEventFilter::~CGestureEventFilter() |
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36 { |
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37 |
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38 } |
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39 |
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40 |
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41 TBool CGestureEventFilter::FilterDrag(const TPointerEvent& aPointerEvent, TInt& aReason) |
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42 { |
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43 TTime now; |
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44 now.HomeTime(); |
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45 return FilterDrag(aPointerEvent, now, aReason); |
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46 } |
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47 |
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48 TBool CGestureEventFilter::FilterDrag(const TPointerEvent& aPointerEvent, TTime& eventTime, TInt& aReason) |
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49 { |
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50 TBool filtered = EFalse; |
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51 |
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52 aReason = EFilteredNoReason; |
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53 |
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54 switch (aPointerEvent.iType) |
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55 { |
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56 case TPointerEvent::EButton1Down: |
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57 { |
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58 iIsTouchDown = ETrue; |
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59 iTouchDownTime = iLastEventTime; |
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60 iTouchDownPos = aPointerEvent.iPosition; |
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61 break; |
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62 } |
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63 case TPointerEvent::EDrag: |
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64 { |
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65 if (iIsTouchDown) |
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66 { |
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67 TPoint delta = aPointerEvent.iPosition - iTouchDownPos; |
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68 filtered = (Abs(delta.iX) <= iTapSize && Abs(delta.iY) <= iTapSize); |
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69 aReason = (filtered) ? EFilteredBySize : EFilteredNoReason; |
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70 } |
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71 |
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72 if (!filtered) |
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73 { |
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74 filtered = (eventTime.MicroSecondsFrom(iLastEventTime) < KMinTimeBetweenDrags); |
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75 aReason = (filtered) ? EFilteredByTime : EFilteredNoReason; |
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76 } |
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77 |
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78 if (!filtered) |
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79 { |
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80 iLastEventTime = eventTime; |
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81 } |
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82 iIsTouchDown = filtered; |
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83 |
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84 break; |
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85 } |
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86 case TPointerEvent::EButton1Up: |
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87 { |
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88 iIsTouchDown = EFalse; |
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89 break; |
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90 } |
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91 } |
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92 |
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93 |
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94 return filtered; |
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95 } |