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1 /* |
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2 * Copyright (c) 2010 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: |
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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 "qstmgestureengine.h" |
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20 #include "qstmfilelogger.h" |
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21 #include "qstmutils.h" |
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22 |
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23 |
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24 using namespace qstmGesture ; |
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25 |
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26 QStm_GestureEngine::QStm_GestureEngine() |
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27 { |
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28 m_loggingEnabled = 0; |
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29 m_numOfActiveStreams = 0 ; |
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30 m_currentGestureOwner = -1 ; |
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31 m_currentLockedGesture = -1 ; |
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32 for (int i = 0; i < qstmUiEventEngine::KMaxNumberOfPointers; i++) { |
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33 m_uiEventStream[i] = NULL ; |
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34 } |
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35 } |
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36 |
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37 QStm_GestureEngine::~QStm_GestureEngine() |
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38 { |
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39 m_gestures.clear() ; |
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40 } |
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41 |
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42 bool QStm_GestureEngine::addGesture(const QStm_GestureRecogniserIf* newGesture) |
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43 { |
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44 // Add the new gesture recogniser to our list of recognisers |
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45 if (newGesture) { |
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46 QStm_GestureRecogniserIf* p = const_cast<QStm_GestureRecogniserIf*>(newGesture); |
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47 m_gestures.append(p); |
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48 } |
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49 return true; |
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50 } |
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51 |
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52 bool QStm_GestureEngine::insertGesture(const QStm_GestureRecogniserIf* newGesture, int startPos) |
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53 { |
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54 QStm_GestureRecogniserIf* p = const_cast<QStm_GestureRecogniserIf*>(newGesture); |
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55 m_gestures.insert(startPos, p); |
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56 return true; |
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57 } |
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58 |
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59 int QStm_GestureEngine::findGesture(const QStm_GestureRecogniserIf* gesture, int startPos) const |
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60 { |
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61 for(int i = MAX(startPos, 0); i < m_gestures.count(); ++i) { |
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62 if(m_gestures[i] == gesture) { |
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63 return i; |
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64 } |
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65 } |
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66 return -1; |
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67 } |
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68 |
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69 int QStm_GestureEngine::findGestureReverse(const QStm_GestureRecogniserIf* gesture, int startPos) const |
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70 { |
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71 for(int i = MIN(startPos, m_gestures.count() - 1); i >=0; --i) { |
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72 if(m_gestures[i] == gesture) { |
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73 return i; |
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74 } |
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75 } |
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76 return -1; |
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77 } |
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78 |
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79 int QStm_GestureEngine::findGesture(QStm_GestureUid uid, int startPos) const |
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80 { |
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81 for(int i = MAX(startPos, 0); i < m_gestures.count(); ++i) { |
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82 if(m_gestures[i]->gestureUid() == uid) { |
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83 return i; |
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84 } |
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85 } |
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86 return -1; |
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87 } |
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88 |
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89 int QStm_GestureEngine::findGestureReverse(QStm_GestureUid uid, int startPos) const |
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90 { |
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91 for(int i = MIN(startPos, m_gestures.count() - 1); i >=0; --i) { |
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92 if(m_gestures[i]->gestureUid() == uid) { |
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93 return i; |
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94 } |
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95 } |
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96 return -1; |
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97 } |
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98 |
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99 int QStm_GestureEngine::gestureCount() const |
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100 { |
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101 return m_gestures.count(); |
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102 } |
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103 |
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104 bool QStm_GestureEngine::removeGesture(const QStm_GestureRecogniserIf* oldGesture) |
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105 { |
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106 // If gestures are removed, there cannot be current gesture owner... |
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107 if (m_currentGestureOwner != -1) |
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108 { |
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109 QStm_GestureRecogniserIf* pgrif = m_gestures[m_currentGestureOwner] ; |
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110 pgrif->release(this) ; |
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111 m_currentGestureOwner = -1 ; // no more gesture owners... |
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112 } |
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113 QStm_GestureRecogniserIf* p = const_cast<QStm_GestureRecogniserIf*>(oldGesture); |
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114 int ix = m_gestures.indexOf(p) ; |
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115 bool found = (ix != -1); |
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116 if (found) { |
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117 m_gestures.removeAt(ix) ; |
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118 } |
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119 return found ; |
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120 } |
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121 |
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122 int QStm_GestureEngine::activeStreamCount() const |
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123 { |
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124 return m_numOfActiveStreams ; |
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125 } |
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126 |
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127 const qstmUiEventEngine::QStm_UiEventIf* QStm_GestureEngine::getUiEvents(int indexOfActiveStream) const |
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128 { |
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129 //#if defined(ADVANCED_POINTER_EVENTS) |
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130 // create temporary array of active event streams and initialize with zero |
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131 const qstmUiEventEngine::QStm_UiEventIf* activeEventPointers[qstmUiEventEngine::KMaxNumberOfPointers] ; |
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132 for (int x = 0; x < qstmUiEventEngine::KMaxNumberOfPointers; activeEventPointers[x++] = 0); |
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133 |
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134 // then fill from currently active event streams |
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135 int indextoactiveEventPointers = 0 ; |
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136 for (int i = 0; i < qstmUiEventEngine::KMaxNumberOfPointers; i++) { |
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137 if (m_uiEventStream[i] != NULL) { |
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138 activeEventPointers[indextoactiveEventPointers++] = m_uiEventStream[i] ; |
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139 } |
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140 } |
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141 // then return the active event stream asked |
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142 return activeEventPointers[indexOfActiveStream] ; |
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143 //#else |
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144 // in single touch it is enough to return the only possible pointer |
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145 // return m_uiEventStream[indexOfActiveStream] ; |
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146 //#endif |
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147 } |
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148 |
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149 /*! |
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150 * Process the UI events |
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151 */ |
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152 void QStm_GestureEngine::handleUiEvent(const qstmUiEventEngine::QStm_UiEventIf& event ) |
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153 { |
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154 // process one incoming UI event |
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155 storeUiEvent(event) ; // store the event to the "stream" based on the index of pointer |
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156 walkTroughGestures() ; // and walk trough the gestures to process the UI event |
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157 updateUiEvents() ; |
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158 // If it was last release event, make sure no-one has the gestures locked |
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159 m_numOfActiveStreams = 0 ; |
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160 for (int i = 0; i < qstmUiEventEngine::KMaxNumberOfPointers; i++) { |
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161 if (m_uiEventStream[i] != NULL) m_numOfActiveStreams++ ; |
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162 } |
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163 |
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164 if (m_numOfActiveStreams == 0) |
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165 { |
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166 if (m_currentLockedGesture != -1) |
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167 { |
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168 QStm_GestureRecogniserIf* pgrif = m_gestures[m_currentLockedGesture] ; |
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169 pgrif->release(this) ; |
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170 } |
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171 m_currentLockedGesture = -1 ; |
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172 } |
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173 } |
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174 |
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175 /*! |
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176 * Store the UI event. There are max X "streams" of events, one for each |
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177 * pointer. The streams are actually just pointers to the latest event, since the |
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178 * MUiEvent interface has methods to walk trough the chain of events. |
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179 */ |
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180 void QStm_GestureEngine::storeUiEvent(const qstmUiEventEngine::QStm_UiEventIf& event) |
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181 { |
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182 m_uiEventStream[event.index()] = &event ; |
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183 m_numOfActiveStreams = 0 ; |
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184 for (int i = 0; i < qstmUiEventEngine::KMaxNumberOfPointers; i++) { |
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185 if (m_uiEventStream[i] != NULL) m_numOfActiveStreams++ ; |
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186 } |
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187 } |
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188 |
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189 /*! |
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190 * Call each gesture handler in turn until one claims to be in control of the gesture. |
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191 */ |
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192 void QStm_GestureEngine::walkTroughGestures() |
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193 { |
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194 int newowner = -1 ; |
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195 int newlocker = -1; //m_currentLockedGesture ; |
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196 // check if someone has locked the gesture |
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197 QStm_GestureRecognitionState thestate = ENotMyGesture ; |
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198 if (m_currentLockedGesture != -1) { |
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199 QStm_GestureRecogniserIf* pgrif = m_gestures[m_currentLockedGesture] ; |
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200 if (pgrif != NULL) { |
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201 if (m_loggingEnabled) { |
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202 // log entry about locked gesture (hmm.. should have added names to the MGestureRecogniserIf |
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203 LOGARG("locked gesture recognizer %d (addr %d), active streams %d", |
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204 m_currentLockedGesture, pgrif, m_numOfActiveStreams); |
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205 } |
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206 |
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207 thestate = pgrif->recognise(m_numOfActiveStreams, this) ; |
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208 switch (thestate) { |
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209 case EGestureActive: |
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210 { |
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211 // This gesture recogniser owns the gesture, so release the lock |
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212 newlocker = -1 ; |
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213 newowner = m_currentLockedGesture ; |
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214 if (m_loggingEnabled) { |
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215 LOGARG("new owner %d lock release", m_currentLockedGesture); |
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216 } |
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217 break; |
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218 } |
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219 case ELockToThisGesture: |
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220 { |
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221 // this gesture recogniser wants to keep the lock |
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222 newowner = m_currentLockedGesture ; |
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223 newlocker = m_currentLockedGesture ; |
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224 if (m_loggingEnabled) { |
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225 LOGARG("new owner %d keep lock", m_currentLockedGesture); |
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226 } |
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227 break; |
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228 |
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229 } |
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230 case ENotMyGesture: |
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231 { |
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232 break; |
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233 } |
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234 } |
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235 } |
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236 else { |
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237 if (m_loggingEnabled) { |
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238 LOGARG("NULL recogniser for %d", m_currentLockedGesture); |
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239 } |
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240 } |
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241 } |
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242 QStm_GestureRecognitionState currentState = ENotMyGesture; |
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243 if (thestate == ENotMyGesture) { |
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244 if (m_loggingEnabled) { |
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245 LOGARG("walk trough recognizers active streams %d", m_numOfActiveStreams); |
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246 } |
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247 // No locking gesture, walk trough the list until someone handles this |
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248 int gcount = m_gestures.count(); |
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249 if (m_currentGestureOwner > -1) { |
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250 QStm_GestureRecogniserIf* gestureOwner = m_gestures[m_currentGestureOwner] ; |
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251 currentState = gestureOwner->state(); |
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252 } |
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253 else { |
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254 currentState = ENotMyGesture; |
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255 } |
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256 |
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257 for (int i = 0; i < gcount; i++) { |
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258 bool controlObtained = false; |
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259 QStm_GestureRecogniserIf* pgrif = m_gestures[i]; |
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260 |
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261 |
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262 if (pgrif != NULL) { |
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263 switch (pgrif->recognise(m_numOfActiveStreams, this)) { |
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264 case EGestureActive: |
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265 { |
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266 // This gesture recogniser owns the gesture, stop looping... |
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267 controlObtained = true; |
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268 newowner = i; |
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269 break; |
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270 } |
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271 case ELockToThisGesture: |
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272 { |
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273 // this gesture recogniser wants to take ownership |
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274 controlObtained = true; |
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275 newowner = i; |
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276 newlocker = i; |
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277 break; |
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278 |
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279 } |
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280 case ENotMyGesture: |
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281 { |
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282 break; |
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283 } |
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284 } |
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285 LOGARG("walkTroughGestures: 0x%x, recognizers count %d, newowner %d, m_currentGestureOwner %d", |
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286 pgrif, gcount, newowner, m_currentGestureOwner); |
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287 } |
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288 if (controlObtained) { |
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289 break; // do not process rest of the gestures |
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290 } |
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291 |
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292 } |
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293 } |
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294 if (newowner != m_currentGestureOwner) { |
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295 if (m_currentGestureOwner != -1 ) { |
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296 QStm_GestureRecogniserIf* pgrif = m_gestures[m_currentGestureOwner] ; |
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297 if ((currentState == EGestureActive || currentState == ELockToThisGesture) && |
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298 pgrif->state() == ENotMyGesture) { |
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299 |
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300 pgrif->release(this) ; |
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301 } |
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302 } |
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303 m_currentGestureOwner = newowner ; |
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304 } |
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305 m_currentLockedGesture = newlocker ; // if someone locked it or released the lock |
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306 } |
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307 |
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308 void QStm_GestureEngine::updateUiEvents() |
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309 { |
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310 for (int i = 0; i < qstmUiEventEngine::KMaxNumberOfPointers; i++) { |
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311 if (m_uiEventStream[i] != NULL) { |
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312 if (m_uiEventStream[i]->code() == qstmUiEventEngine::ERelease) { |
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313 // Event can be removed since Release is the last event |
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314 // note that it is the lower layer event engine |
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315 // which actually deletes the object |
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316 m_uiEventStream[i] = NULL ; |
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317 } |
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318 } |
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319 } |
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320 } |
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321 |
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322 |