1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | |
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15 | package de.ugoe.cs.autoquest.eventcore.gui; |
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16 | |
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17 | import java.util.LinkedList; |
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18 | import java.util.List; |
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19 | |
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20 | import de.ugoe.cs.autoquest.eventcore.Event; |
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21 | import de.ugoe.cs.autoquest.eventcore.IEventTarget; |
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22 | |
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23 | /** |
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24 | * <p> |
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25 | * This class condenses mouse clicks, i.e. it reduces a sequence of mouse button down, mouse button |
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26 | * up and possibly a subsequent mouse click with the same button on the same event target and the |
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27 | * same coordinates to a single mouse click with that button on that target at the coordinates. |
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28 | * The mouse button down and mouse button up events are discarded. For this, it iterates the |
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29 | * provided sequence and identifies any match of the named event sequence pattern. This match is |
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30 | * condensed to the mouse click event. |
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31 | * </p> |
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32 | * TODO correctly identify drag and drop |
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33 | * |
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34 | * @version 1.0 |
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35 | * @author Patrick Harms |
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36 | */ |
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37 | public class MouseClickCondenser { |
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38 | |
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39 | /** |
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40 | * <p> |
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41 | * This method performs the work described in the description of the class. A new list is |
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42 | * instantiated and returned. This list is filled with the events provided by the sequence being |
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43 | * the parameter of the method except for mouse button down and mouse button up events which are |
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44 | * followed by a mouse click event with the same button on the same target. |
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45 | * </p> |
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46 | * |
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47 | * @param sequence |
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48 | * the event sequence to condense the mouse clicks in |
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49 | * |
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50 | * @return the resulting sequence, in which mouse clicks are condensed to single mouse click |
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51 | * events |
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52 | */ |
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53 | public List<Event> condenseMouseClicks(List<Event> sequence) { |
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54 | List<Event> resultingSequence = new LinkedList<Event>(); |
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55 | |
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56 | int index = 0; |
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57 | boolean mouseClickHandled; |
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58 | while (index < sequence.size()) |
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59 | { |
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60 | mouseClickHandled = false; |
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61 | if ((index + 1) < sequence.size()) { |
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62 | Event mbDown = sequence.get(index); |
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63 | Event mbUp = sequence.get(index + 1); |
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64 | |
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65 | if (((index + 2) < sequence.size()) && |
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66 | mouseClickSequenceFound(mbDown, mbUp, sequence.get(index + 2))) |
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67 | { |
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68 | // skip the mouse button down and mouse button up event and add the mouse click |
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69 | index += 2; |
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70 | resultingSequence.add(sequence.get(index)); |
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71 | index++; |
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72 | mouseClickHandled = true; |
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73 | } |
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74 | else if (mouseClickSequenceFound(mbDown, mbUp)) { |
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75 | // skip the mouse button down and mouse button up event and add a mouse click |
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76 | index += 2; |
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77 | resultingSequence.add(createClick(mbDown, mbUp)); |
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78 | mouseClickHandled = true; |
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79 | } |
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80 | } |
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81 | |
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82 | if (!mouseClickHandled) { |
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83 | resultingSequence.add(sequence.get(index)); |
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84 | index++; |
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85 | } |
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86 | } |
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87 | |
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88 | return resultingSequence; |
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89 | } |
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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 | private boolean mouseClickSequenceFound(Event mouseButtonDown, |
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95 | Event mouseButtonUp, |
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96 | Event mouseClick) |
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97 | { |
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98 | if (!mouseClickSequenceFound(mouseButtonDown, mouseButtonUp)) { |
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99 | return false; |
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100 | } |
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101 | |
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102 | // check the third node for validity |
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103 | if (!(mouseClick.getType() instanceof MouseClick)) { |
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104 | return false; |
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105 | } |
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106 | |
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107 | IEventTarget eventTarget = mouseButtonDown.getTarget(); |
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108 | |
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109 | if (!eventTarget.equals(mouseClick.getTarget())) { |
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110 | return false; |
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111 | } |
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112 | |
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113 | MouseButtonInteraction.Button button = |
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114 | ((MouseButtonDown) mouseButtonDown.getType()).getButton(); |
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115 | |
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116 | if (!button.equals(((MouseClick) mouseClick.getType()).getButton())) { |
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117 | return false; |
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118 | } |
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119 | |
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120 | int x = ((MouseButtonDown) mouseButtonDown.getType()).getX(); |
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121 | |
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122 | if (x != ((MouseClick) mouseClick.getType()).getX()) { |
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123 | return false; |
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124 | } |
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125 | |
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126 | int y = ((MouseButtonDown) mouseButtonDown.getType()).getY(); |
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127 | |
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128 | if (y != ((MouseClick) mouseClick.getType()).getY()) { |
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129 | return false; |
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130 | } |
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131 | |
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132 | return true; |
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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 | */ |
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138 | private boolean mouseClickSequenceFound(Event mouseButtonDown, |
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139 | Event mouseButtonUp) |
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140 | { |
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141 | // check the first in a row of three for validity |
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142 | if (!(mouseButtonDown.getType() instanceof MouseButtonDown)) { |
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143 | return false; |
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144 | } |
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145 | |
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146 | // check the second node for validity |
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147 | if (!(mouseButtonUp.getType() instanceof MouseButtonUp)) { |
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148 | return false; |
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149 | } |
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150 | |
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151 | IEventTarget eventTarget = mouseButtonDown.getTarget(); |
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152 | |
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153 | if (!eventTarget.equals(mouseButtonUp.getTarget())) { |
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154 | return false; |
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155 | } |
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156 | |
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157 | MouseButtonInteraction.Button button = |
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158 | ((MouseButtonDown) mouseButtonDown.getType()).getButton(); |
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159 | |
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160 | if (!button.equals(((MouseButtonUp) mouseButtonUp.getType()).getButton())) { |
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161 | return false; |
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162 | } |
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163 | |
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164 | int x = ((MouseButtonDown) mouseButtonDown.getType()).getX(); |
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165 | |
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166 | if (x != ((MouseButtonUp) mouseButtonUp.getType()).getX()) { |
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167 | return false; |
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168 | } |
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169 | |
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170 | int y = ((MouseButtonDown) mouseButtonDown.getType()).getY(); |
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171 | |
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172 | if (y != ((MouseButtonUp) mouseButtonUp.getType()).getY()) { |
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173 | return false; |
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174 | } |
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175 | |
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176 | return true; |
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177 | } |
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178 | |
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179 | /** |
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180 | * |
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181 | */ |
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182 | private Event createClick(Event mouseButtonDown, Event mouseButtonUp) { |
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183 | MouseButtonInteraction.Button button = |
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184 | ((MouseButtonDown) mouseButtonDown.getType()).getButton(); |
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185 | |
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186 | int x = ((MouseButtonDown) mouseButtonDown.getType()).getX(); |
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187 | int y = ((MouseButtonDown) mouseButtonDown.getType()).getY(); |
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188 | |
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189 | return new Event(new MouseClick(button, x, y), mouseButtonDown.getTarget()); |
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190 | } |
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191 | |
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192 | } |
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