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2 | package de.ugoe.cs.eventbench.jfcmonitor;
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3 |
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4 | import java.awt.Component;
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5 | import java.awt.Container;
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6 | import java.io.File;
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7 | import java.lang.reflect.InvocationTargetException;
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8 | import java.lang.reflect.Method;
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9 | import java.security.InvalidParameterException;
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10 | import java.util.HashMap;
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11 | import java.util.LinkedList;
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12 | import java.util.List;
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13 | import java.util.Map;
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14 |
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15 | import javax.accessibility.AccessibleContext;
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16 |
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17 | import de.ugoe.cs.util.StringTools;
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18 |
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19 | /**
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20 | * <p>
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21 | * This class manages information about the current GUI. It always contains the current GUI
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22 | * hierarchy.
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23 | * </p>
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24 | *
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25 | * @author Steffen Herbold
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26 | * @version 1.0
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27 | */
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28 | public class JFCComponent {
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29 |
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30 | /**
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31 | * <p>
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32 | * Map of all known GUI components.
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33 | * </p>
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34 | */
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35 | private static Map<Component, JFCComponent> knownComponents =
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36 | new HashMap<Component, JFCComponent>();
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37 |
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38 | /**
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39 | * <p>
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40 | * Adds a AWT component to the GUI hierarchy. If the component already exists in the hierarchy,
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41 | * it is not added a second time.
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42 | * </p>
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43 | *
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44 | * @param component
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45 | * component that is added
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46 | */
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47 | public static void add(Component component) {
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48 | add(component, find(component.getParent()));
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49 | }
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50 |
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51 | /**
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52 | * <p>
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53 | * Adds a AWT component to the GUI hierarchy. If the component already exists in the hierarchy,
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54 | * it is not added a second time.
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55 | * </p>
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56 | *
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57 | * @param component
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58 | * component that is added
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59 | * @param parent
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60 | * parent of the component
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61 | */
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62 | public static void add(Component component, JFCComponent parent) {
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63 | if (!knownComponents.containsKey(component)) {
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64 | knownComponents.put(component, new JFCComponent(component, parent));
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65 | }
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66 | }
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67 |
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68 | /**
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69 | * <p>
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70 | * Finds a component in the GUI hierarchy and returns the corresponding JFComponent instance.
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71 | * Returns null if the component is not found.
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72 | * </p>
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73 | *
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74 | * @param component
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75 | * component that is searched for
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76 | * @return corresponding JFComponent instance; null if the compenent is not found
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77 | */
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78 | public static JFCComponent find(Component component) {
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79 | return knownComponents.get(component);
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80 | }
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81 |
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82 | /**
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83 | * <p>
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84 | * Removes a component from the GUI hierarchy. In case the component is not part of the known
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85 | * hierachy, nothing happens.
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86 | * </p>
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87 | *
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88 | * @param component
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89 | * component to be removed
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90 | */
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91 | public static void remove(Component component) {
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92 | JFCComponent jfcComponent = knownComponents.remove(component);
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93 | if (jfcComponent != null) {
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94 | jfcComponent.removeFromParent();
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95 | jfcComponent.removeChildren();
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96 | }
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97 | }
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98 |
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99 | /**
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100 | * <p>
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101 | * Parent of the GUI component. null means, that the component has no parent.
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102 | * </p>
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103 | */
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104 | private JFCComponent parent = null;
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105 |
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106 | /**
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107 | * <p>
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108 | * Child components of the component.
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109 | * </p>
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110 | */
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111 | private List<JFCComponent> children = new LinkedList<JFCComponent>();
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112 |
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113 | /**
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114 | * <p>
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115 | * Reference to the actual GUI component.
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116 | * </p>
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117 | */
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118 | private Component component;
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119 |
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120 | /**
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121 | * <p>
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122 | * Helper attribute that contains the title of the component. Set by {@link #setTitle()}.
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123 | * </p>
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124 | */
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125 | private String title = null;
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126 |
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127 | /**
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128 | * <p>
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129 | * Helper attribute that contains the class of the component. Set by {@link #setClass()}.
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130 | * </p>
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131 | */
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132 | private String componentClass = null;
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133 |
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134 | /**
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135 | * <p>
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136 | * Helper attribute that contains the icon of the component. Set by {@link #setIcon()}.
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137 | * </p>
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138 | */
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139 | private String icon = null;
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140 |
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141 | /**
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142 | * <p>
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143 | * Helper attribute that contains the icon of the component. Set by {@link #setIndex()}.
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144 | * </p>
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145 | */
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146 | private int index = -1;
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147 |
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148 | /**
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149 | * <p>
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150 | * Constructor. Creates a new JFCComponent. Only used internally by
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151 | * {@link #add(Component, JFCComponent)}.
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152 | * </p>
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153 | *
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154 | * @param component
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155 | * component associated with the JFCComponent
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156 | * @param parent
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157 | * parent of the component; null if there is no parent
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158 | */
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159 | private JFCComponent(Component component, JFCComponent parent) {
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160 | if (component == null) {
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161 | throw new InvalidParameterException("parameter component must not be null");
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162 | }
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163 | this.component = component;
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164 | this.parent = parent;
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165 | if (parent != null) {
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166 | parent.addChild(this);
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167 | }
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168 |
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169 | if (component instanceof Container) {
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170 | for (Component childComponent : ((Container) component).getComponents()) {
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171 | add(childComponent, this);
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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 | /**
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177 | * <p>
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178 | * Adds a child component to the current component.
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179 | * </p>
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180 | *
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181 | * @param child
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182 | * child component to be added
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183 | */
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184 | private void addChild(JFCComponent child) {
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185 | children.add(child);
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186 | }
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187 |
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188 | /**
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189 | * <p>
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190 | * Returns an XML representation of the component.
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191 | * </p>
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192 | *
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193 | * @return XLM snippet
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194 | */
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195 | public String getXML() {
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196 | setClass();
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197 | setIcon();
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198 | setIndex();
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199 | setTitle();
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200 | StringBuilder builder = new StringBuilder();
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201 | if (parent != null) {
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202 | builder.append(parent.getXML());
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203 | }
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204 | builder.append(" <component>" + StringTools.ENDLINE);
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205 | builder.append(" <param name=\"title\" value=\"" + title + "\" />" + StringTools.ENDLINE);
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206 | builder.append(" <param name=\"class\" value=\"" + componentClass + "\" />" +
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207 | StringTools.ENDLINE);
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208 | builder.append(" <param name=\"icon\" value=\"" + icon + "\" />" + StringTools.ENDLINE);
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209 | builder.append(" <param name=\"index\" value=\"" + index + "\" />" + StringTools.ENDLINE);
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210 | builder.append(" <param name=\"hash\" value=\"" +
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211 | Integer.toHexString(component.hashCode()) + "\" />" + StringTools.ENDLINE);
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212 | builder.append(" </component>" + StringTools.ENDLINE);
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213 | return builder.toString();
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214 | }
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215 |
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216 | /**
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217 | * <p>
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218 | * Removes a child component from the current component.
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219 | * </p>
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220 | *
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221 | * @param child
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222 | * child component to be removed
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223 | */
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224 | private void removeChild(JFCComponent child) {
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225 | children.remove(child);
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226 | }
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227 |
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228 | /**
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229 | * <p>
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230 | * Removes the component from the list of children of its parent.
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231 | * </p>
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232 | */
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233 | private void removeFromParent() {
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234 | if (parent != null) {
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235 | parent.removeChild(this);
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236 | }
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237 | }
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238 |
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239 | /**
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240 | * <p>
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241 | * Triggers the removals of all child components from the GUI hierarchy, i.e., calls
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242 | * {@link #remove(Component)} for all child components.
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243 | * </p>
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244 | */
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245 | private void removeChildren() {
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246 | for (JFCComponent child : children) {
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247 | remove(child.component);
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248 | }
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249 | }
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250 |
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251 | /**
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252 | * <p>
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253 | * Sets the {@link #title} of the component. The title is defined as follows (first in the list,
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254 | * that is not null):
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255 | * <ul>
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256 | * <li>accessible name of the component if available</li>
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257 | * <li>{@link #icon} of the component</li>
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258 | * <li>name of the component</li>
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259 | * <li>coordinates of the component</li>
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260 | * </ul>
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261 | * </p>
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262 | */
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263 | private void setTitle() {
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264 | title = null; // reset title
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265 |
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266 | AccessibleContext accessibleContext = component.getAccessibleContext();
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267 | if (accessibleContext != null) {
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268 | title = accessibleContext.getAccessibleName();
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269 | }
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270 | if (title == null) {
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271 | title = icon;
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272 | }
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273 | if (title == null) {
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274 | title = component.getName();
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275 | }
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276 | if (title == null) {
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277 | // use coordinates as last resort
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278 | title = "Pos(" + component.getX() + "," + component.getY() + ")";
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279 | }
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280 | }
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281 |
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282 | /**
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283 | * <p>
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284 | * Sets the {@link #componentClass} of the component.
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285 | * </p>
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286 | */
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287 | private void setClass() {
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288 | componentClass = component.getClass().getName();
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289 | }
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290 |
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291 | /**
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292 | * <p>
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293 | * Sets the {@link #icon} of the component.
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294 | * </p>
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295 | */
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296 | private void setIcon() {
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297 | icon = null; // reset icon
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298 |
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299 | Method getIconMethod;
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300 | try {
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301 | getIconMethod = component.getClass().getMethod("getIcon", new Class[0]);
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302 | if (getIconMethod != null) {
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303 | Object iconObject = getIconMethod.invoke(component, new Object[] { });
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304 | if (iconObject != null) {
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305 | String iconPath = iconObject.toString();
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306 | if (!iconPath.contains("@")) {
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307 | System.out.println("iconPath");
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308 | String[] splitResult =
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309 | iconPath.split(File.separatorChar == '\\' ? "\\\\" : File.separator);
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310 | icon = splitResult[splitResult.length - 1];
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311 | }
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312 | }
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313 | }
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314 | }
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315 | catch (SecurityException e) {}
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316 | catch (NoSuchMethodException e) {}
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317 | catch (IllegalArgumentException e) {}
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318 | catch (IllegalAccessException e) {}
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319 | catch (InvocationTargetException e) {
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320 | System.err.println("Found method with name " + "getIcon" + " but could not access it.");
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321 | }
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322 | }
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323 |
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324 | /**
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325 | * <p>
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326 | * Sets the {@link #index} of the component as the index in the parent, if it is accessible.
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327 | * </p>
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328 | */
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329 | private void setIndex() {
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330 | index = -1; // reset index
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331 |
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332 | AccessibleContext accessibleContext = component.getAccessibleContext();
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333 | if (accessibleContext != null) {
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334 | index = accessibleContext.getAccessibleIndexInParent();
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335 | }
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336 | }
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337 |
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338 | }
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