1 /* |
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2 * Copyright (c) 2008-2009 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: RT Gesture helper interface |
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15 * |
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16 */ |
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17 |
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18 #ifndef _RT_GESTUREOBSERVER_H_ |
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19 #define _RT_GESTUREOBSERVER_H_ |
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20 |
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21 #include <e32std.h> |
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22 |
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23 namespace RT_GestureHelper |
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24 { |
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25 |
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26 /// flag that indicates gesture code is a holding code |
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27 /// clients should use MGestureEvent::IsHolding |
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28 const TInt EFlagHold = 0x10000000; |
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29 |
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30 enum TGestureCode |
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31 { |
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32 // states |
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33 EGestureStart = 0x00000001, // gesture just started (user pressed stylus down) |
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34 EGestureDrag = 0x00000002, // user moved stylus (may be holding or not holding) |
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35 EGestureReleased = 0x00000003, // user lifted stylus while user was holding |
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36 // gestures |
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37 EGestureUnknown = 0x00000005, // gesture was not recognised |
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38 // these codes are sent when user lifts stylus (if holding not started) |
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39 EGestureTap = 0x00000006, |
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40 EGestureDoubleTap = 0x00000007, // only if double tap is enabled |
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41 // (via CGestureHelper::SetDoubleTapEnabled or |
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42 // CGestureControl::SetDoubleTapEnabled) |
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43 EGestureSwipeLeft = 0x00000008, |
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44 EGestureSwipeRight = 0x00000009, |
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45 EGestureSwipeUp = 0x0000000A, |
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46 EGestureSwipeDown = 0x0000000B, |
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47 |
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48 EGestureFlick = 0x0000000C, |
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49 EGestureLongTap = 0x0000000D, |
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50 EGestureDrop = 0x0000000E, |
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51 |
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52 // these codes are sent when user initiates holding by keeping stylus in |
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53 // same place for a longer duration |
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54 EGestureHoldLeft = EGestureSwipeLeft | EFlagHold, |
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55 EGestureHoldRight = EGestureSwipeRight | EFlagHold, |
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56 EGestureHoldUp = EGestureSwipeUp | EFlagHold, |
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57 EGestureHoldDown = EGestureSwipeDown | EFlagHold, |
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58 EGesturePinch |
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59 }; |
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60 |
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61 /** |
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62 * Point of float accuracy |
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63 */ |
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64 NONSHARABLE_STRUCT( TRealPoint ) |
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65 { |
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66 inline TRealPoint(); |
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67 inline TRealPoint( const TRealPoint& aPoint ); |
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68 inline TRealPoint( TReal aX, TReal aY ); |
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69 inline TBool operator==( const TRealPoint& aPoint ) const; |
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70 |
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71 TReal32 iX; |
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72 TReal32 iY; |
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73 }; |
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74 |
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75 /** |
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76 * a gesture event |
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77 */ |
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78 |
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79 enum TAxis |
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80 { |
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81 EAxisBoth, |
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82 EAxisHorizontal, |
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83 EAxisVertical |
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84 }; |
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85 |
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86 |
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87 class TGestureEvent |
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88 { |
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89 public: |
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90 inline TGestureCode Code( TAxis /*aRelevantAxis*/ ) const { return iCode; }; |
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91 inline TBool IsHolding() const { return iIsHolding; }; |
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92 inline TPoint StartPos() const { return iStartPos; }; |
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93 inline TPoint CurrentPos() const { return iCurrPos; }; |
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94 inline TRealPoint Speed() const { return iSpeed; }; |
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95 inline TRealPoint SpeedPercent ( const TRect& /*aEdges*/ ) const { return iSpeedPercent; }; |
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96 inline TPoint Distance() const { return iDistance; }; |
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97 |
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98 inline void SetCurrentPos(TPoint aPos) { iCurrPos = aPos; }; |
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99 inline void SetStartPos(TPoint aPos) {iStartPos = aPos; }; |
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100 inline void SetCode(TGestureCode aCode) {iCode = aCode; }; |
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101 inline void SetSpeed(TRealPoint aSpeed) { iSpeed = aSpeed; }; |
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102 inline void SetDistance(TPoint aDistance) { iDistance = aDistance; }; |
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103 inline void SetSpeedPercent(TRealPoint aSpeedPercent) { iSpeedPercent = aSpeedPercent; }; |
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104 |
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105 inline void SetIsHolding(TBool aIsHolding) { iIsHolding = aIsHolding; }; |
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106 |
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107 private: |
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108 TGestureCode iCode; |
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109 TBool iIsHolding; |
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110 TPoint iStartPos; |
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111 TPoint iCurrPos; |
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112 TRealPoint iSpeed; |
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113 TRealPoint iSpeedPercent; |
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114 TPoint iDistance; |
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115 }; |
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116 |
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117 |
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118 // ---------------------------------------------------------------------------- |
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119 // Default constructor for real point |
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120 // ---------------------------------------------------------------------------- |
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121 // |
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122 inline TRealPoint::TRealPoint() |
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123 : iX( 0 ), iY( 0 ) |
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124 { |
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125 } |
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126 |
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127 // ---------------------------------------------------------------------------- |
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128 // Copy constructor for real point |
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129 // ---------------------------------------------------------------------------- |
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130 // |
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131 inline TRealPoint::TRealPoint( const TRealPoint& aPoint ) |
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132 : iX( aPoint.iX ), iY( aPoint.iY ) |
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133 { |
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134 } |
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135 |
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136 // ---------------------------------------------------------------------------- |
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137 // Copy constructor for real point |
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138 // ---------------------------------------------------------------------------- |
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139 // |
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140 inline TRealPoint::TRealPoint( TReal aX, TReal aY ) |
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141 : iX( aX ), iY( aY ) |
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142 { |
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143 } |
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144 |
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145 // ---------------------------------------------------------------------------- |
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146 // Default constructor for real point |
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147 // ---------------------------------------------------------------------------- |
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148 // |
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149 inline TBool TRealPoint::operator==( const TRealPoint& aPoint ) const |
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150 { |
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151 return iX == aPoint.iX && iY == aPoint.iY; |
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152 } |
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153 |
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154 |
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155 } // namespace RT_GestureHelper |
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156 |
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157 #endif // _RT_GESTUREOBSERVER_H_ |
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