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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 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 #include "hoveringgesturerecogniser.h" |
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19 #include "GenericSimpleGesture.h" |
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20 #include "rt_uievent.h" |
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21 |
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22 #include "filelogger.h" |
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23 |
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24 using namespace stmGesture ; |
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25 |
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26 extern long Mm2Pixels(long mm) ; |
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27 |
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28 |
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29 CHoveringGestureRecogniser::CHoveringGestureRecogniser(MGestureListener* aListener) : |
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30 CGestureRecogniser(aListener) |
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31 { |
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32 m_hovering = false ; |
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33 m_hoveringspeed = 0.9f ; |
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34 } |
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35 |
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36 CHoveringGestureRecogniser* CHoveringGestureRecogniser::NewL(MGestureListener* aListener) |
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37 { |
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38 CHoveringGestureRecogniser* self = new (ELeave) CHoveringGestureRecogniser(aListener) ; |
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39 return self; |
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40 } |
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41 |
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42 CHoveringGestureRecogniser::~CHoveringGestureRecogniser() |
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43 { |
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44 } |
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45 |
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46 TGestureRecognitionState CHoveringGestureRecogniser::recognise(int numOfActiveStreams, |
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47 MGestureEngineIf* pge) |
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48 { |
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49 TGestureRecognitionState state = ENotMyGesture; |
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50 // Check if we are enabled or not |
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51 if (!m_gestureEnabled) return state ; |
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52 |
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53 // Look at the events to see if it looks like hovering |
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54 if (numOfActiveStreams == 1) |
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55 { |
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56 // Then look at the event stream, it has to be tap and release |
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57 const stmUiEventEngine::MUiEvent* puie = pge->getUiEvents(0); |
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58 int countOfEvents = puie->countOfEvents() ; |
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59 stmUiEventEngine::TUiEventCode eventCode = puie->Code() ; |
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60 if (countOfEvents > 1) // do we have more than one event in the stream? |
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61 { |
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62 // Then look at the events to see if they are suitable for us |
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63 // should we check that all of the events are targeted to our window? |
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64 // currently we only check if the last one is for us and is EMove, then we pan... |
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65 if (puie->Target() == m_powner && |
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66 eventCode == stmUiEventEngine::EMove) // The last one is move in our window |
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67 { |
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68 float speedX = puie->speedX() ; |
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69 float speedY = puie->speedY() ; |
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70 if (m_loggingenabled) |
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71 { |
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72 LOGARG("CHoveringGestureRecogniser: %d: num %d code %d, speed %f, limit %f", |
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73 m_hovering, countOfEvents, eventCode, |
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74 double(speedX), double(m_hoveringspeed)); |
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75 } |
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76 // It might be hovering gesture in our window, handle it |
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77 if (!m_hovering) |
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78 { |
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79 // we are not yet hovering, so lets see if it is slow movement |
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80 // but it must be movement; if it is 0.0 do not hover |
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81 if ( ((speedX > 0.01f) ||(speedY > 0.01f)) && |
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82 ((speedX < m_hoveringspeed) || (speedY < m_hoveringspeed)) |
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83 ) |
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84 { |
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85 state = EGestureActive; |
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86 m_hovering = true; |
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87 } |
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88 } |
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89 if (m_hovering) |
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90 { |
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91 // after we've started hovering, the speed could be increased a little before we loose hovering |
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92 // but this adjustment is not implemented now... |
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93 if (speedX < m_hoveringspeed || speedY < m_hoveringspeed) |
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94 |
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95 { |
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96 using stmUiEventEngine::TUiEventSpeed; |
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97 |
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98 state = EGestureActive; |
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99 TUiEventSpeed speedIf(speedX, speedY); |
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100 stmGesture::TDirectionalGesture pgest( |
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101 KUid, |
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102 puie->CurrentXY(), |
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103 puie->PreviousXY(), |
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104 &speedIf, |
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105 m_loggingenabled); |
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106 |
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107 // Call the listener to inform that a Hover has occurred... |
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108 m_listener->gestureEnter(pgest); |
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109 } |
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110 } |
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111 } |
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112 else if (m_hovering) |
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113 { |
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114 if (eventCode == stmUiEventEngine::ERelease) // The last one is release in any window |
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115 { |
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116 m_hovering = false ; |
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117 // release will handle informing of the listener |
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118 } |
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119 } |
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120 } |
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121 else |
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122 { |
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123 // count of events == 1, lets see if it is EMove, then we take it and start hovering |
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124 if (puie->Target() == m_powner && |
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125 eventCode == stmUiEventEngine::EMove) // The only one is move in our window |
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126 { |
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127 if (m_loggingenabled) |
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128 { |
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129 LOGARG("CHoveringGestureRecogniser: move: num %d code %d", countOfEvents, eventCode); |
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130 } |
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131 state = EGestureActive; |
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132 stmGesture::TDirectionalGesture pgest( |
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133 KUid, |
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134 puie->CurrentXY(), |
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135 puie->PreviousXY(), |
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136 puie, |
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137 m_loggingenabled); |
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138 |
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139 // Call the listener to inform that a Hover has occurred... |
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140 m_listener->gestureEnter(pgest); |
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141 } |
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142 } |
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143 } |
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144 if (state == ENotMyGesture) |
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145 { |
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146 // if it was not our gesture, then the state can not be hovering... |
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147 m_hovering = false ; |
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148 } |
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149 return state; |
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150 } |
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151 |
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152 void CHoveringGestureRecogniser::release(MGestureEngineIf* /*ge*/) |
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153 { |
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154 m_hovering = false ; |
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155 m_listener->gestureExit(KUid) ; |
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156 } |
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157 |
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158 void CHoveringGestureRecogniser::setHoveringSpeed(float aSpeed) __SOFTFP |
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159 { |
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160 m_hoveringspeed = aSpeed ; |
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161 } |
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162 |