1 | /**
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2 | *#########################################################################
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3 | *
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4 | * A component of the Gatherer application, part of the Greenstone digital
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5 | * library suite from the New Zealand Digital Library Project at the
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6 | * University of Waikato, New Zealand.
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7 | *
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8 | * Author: John Thompson, Greenstone Digital Library, University of Waikato
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9 | *
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10 | * Copyright (C) 1999 New Zealand Digital Library Project
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11 | *
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12 | * This program is free software; you can redistribute it and/or modify
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13 | * it under the terms of the GNU General Public License as published by
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14 | * the Free Software Foundation; either version 2 of the License, or
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15 | * (at your option) any later version.
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16 | *
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17 | * This program is distributed in the hope that it will be useful,
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18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 | * GNU General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, write to the Free Software
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24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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25 | *########################################################################
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26 | */
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27 | package org.greenstone.gatherer.cdm;
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28 |
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29 | import java.awt.*;
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30 | import java.awt.event.*;
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31 | import java.io.*;
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32 | import java.net.*;
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33 | import java.util.*;
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34 | import java.util.jar.*;
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35 | import javax.swing.*;
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36 | import javax.swing.event.*;
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37 | import org.apache.xerces.parsers.*;
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38 | import org.greenstone.gatherer.Configuration;
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39 | import org.greenstone.gatherer.DebugStream;
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40 | import org.greenstone.gatherer.Dictionary;
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41 | import org.greenstone.gatherer.Gatherer;
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42 | import org.greenstone.gatherer.greenstone.Classifiers;
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43 | import org.greenstone.gatherer.gui.DesignPaneHeader;
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44 | import org.greenstone.gatherer.gui.GComboBox;
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45 | import org.greenstone.gatherer.gui.GLIButton;
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46 | import org.greenstone.gatherer.remote.RemoteGreenstoneServer;
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47 | import org.greenstone.gatherer.util.JarTools;
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48 | import org.greenstone.gatherer.util.StaticStrings;
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49 | import org.greenstone.gatherer.util.Utility;
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50 | import org.greenstone.gatherer.util.XMLTools;
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51 | import org.w3c.dom.*;
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52 | import org.xml.sax.*;
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53 |
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54 | /** This class is responsible for keeping track of all the classifiers assigned to this collection, and providing methods for adding and removing them.
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55 | * @author John Thompson, Greenstone Digital Library, University of Waikato
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56 | * @version 2.3
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57 | */
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58 | public class ClassifierManager
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59 | extends DOMProxyListModel {
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60 | /** The controls for editing the contents of this manager. */
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61 | private Control controls = null;
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62 |
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63 | private DOMProxyListModel model;
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64 | private Classifier default_classifier = null;
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65 |
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66 | /** Constructor.
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67 | * @see org.greenstone.gatherer.cdm.DynamicListModel
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68 | * @see org.greenstone.gatherer.collection.CollectionManager
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69 | */
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70 | public ClassifierManager () {
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71 | super (CollectionDesignManager.collect_config.getDocumentElement (), StaticStrings.CLASSIFY_ELEMENT, new Classifier ());
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72 | this.model = this;
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73 | DebugStream.println ("ClassifierManager: " + getSize () + " classifiers parsed.");
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74 |
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75 | // Force the assigned classifiers to be loaded and cached now
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76 | for (int i = 0; i < getSize (); i++) {
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77 | getElementAt (i);
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78 | }
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79 | }
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80 |
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81 |
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82 | /** Retrieve a list of the classifiers that are available to be added to the collection. */
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83 | private Object[] getAvailableClassifiers () {
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84 | ArrayList available = new ArrayList ();
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85 |
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86 | // Add all the non-abstract core Greenstone classifiers
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87 | ArrayList classifiers_list = Classifiers.getClassifiersList ();
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88 | for (int i = 0; i < classifiers_list.size (); i++) {
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89 | Classifier classifier = (Classifier) classifiers_list.get (i);
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90 | if (!classifier.isAbstract ()) {
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91 | available.add (classifier);
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92 | }
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93 | if (classifier.toString().equals("List")) {
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94 | default_classifier = classifier;
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95 | }
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96 | }
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97 |
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98 | // Sort the available classifiers into alphabetical order
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99 | Collections.sort (available);
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100 |
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101 | return available.toArray ();
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102 | }
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103 |
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104 |
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105 | /** Method to assign a classifier (i.e., add a new classifier onto the list).
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106 | * @param classifier The base <strong>Classifier</strong> to assign.
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107 | * @see org.greenstone.gatherer.cdm.DynamicListModel
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108 | */
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109 | private void assignClassifier (Classifier classifier) {
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110 | if(!contains (classifier)) {
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111 | Element element = classifier.getElement ();
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112 | // Locate where we should insert this new classifier.
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113 | Node target_node = CollectionConfiguration.findInsertionPoint (element);
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114 | add (root, classifier, target_node);
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115 |
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116 | // tell the format manager to update the names of its format statements
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117 | Gatherer.c_man.getCollection ().cdm.format_manager.refresh ();
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118 | }
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119 | }
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120 |
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121 |
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122 | /** Destructor. */
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123 | public void destroy () {
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124 | if (controls != null) {
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125 | controls.destroy ();
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126 | controls = null;
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127 | }
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128 | }
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129 |
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130 |
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131 | /** Method to retrieve the classifier with the given index.
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132 | * @param index The index of the desired classifier as an <i>int</i>.
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133 | * @return The requested Classifier or <i>null</i> if no such classifier exists.
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134 | */
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135 | public Classifier getClassifier (int index) {
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136 | if(0 <= index && index < getSize ()) {
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137 | return (Classifier) getElementAt (index);
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138 | }
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139 | return null;
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140 | }
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141 |
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142 | /** Method to retrieve the control for this manager.
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143 | * @return the Control for editing classifiers
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144 | */
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145 | public Control getControls () {
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146 | if(controls == null) {
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147 | // Build controls
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148 | this.controls = new ClassifierControl ();
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149 | }
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150 | return controls;
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151 | }
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152 |
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153 | /** Called when the detail mode has changed which in turn may cause several design elements to be available/hidden
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154 | * @param mode the new mode as an int
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155 | */
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156 | public void modeChanged (int mode) {
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157 |
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158 | }
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159 |
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160 |
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161 |
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162 | /** Determine if the Phind classifier has been assigned.
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163 | * @return true if it has, false otherwise
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164 | */
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165 | public boolean isPhindClassifierAssigned () {
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166 | for(int i = 0; i < getSize (); i++) {
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167 | Classifier classifier = (Classifier) getElementAt (i);
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168 | if(classifier.getName ().equalsIgnoreCase (StaticStrings.PHIND_CLASSIFIER)) {
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169 | return true;
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170 | }
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171 | classifier = null;
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172 | }
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173 | return false;
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174 | }
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175 |
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176 | /** Determine if a DateList classifier has been assigned
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177 | * @return true if it has, false otherwise
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178 | */
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179 | public boolean isDateListClassifierAssigned () {
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180 | for(int i = 0; i < getSize (); i++) {
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181 | Classifier classifier = (Classifier) getElementAt (i);
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182 | if(classifier.getName ().equalsIgnoreCase (StaticStrings.DATELIST_CLASSIFIER)) {
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183 | return true;
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184 | }
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185 | classifier = null;
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186 | }
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187 | return false;
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188 |
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189 | }
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190 | /** Method to move a classifier in the list order.
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191 | * @param classifier the Classifier you want to move.
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192 | * @param direction true to move the classifier up, false to move it down.
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193 | * @param all true to move to move all the way, false for a single step.
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194 | */
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195 | private void moveClassifier (Classifier classifier, boolean direction, boolean all) {
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196 | if(getSize () < 2) {
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197 | DebugStream.println ("Not enough classifiers to allow moving.");
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198 | return;
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199 | }
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200 | if(all) {
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201 | // Move to top
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202 | if(direction) {
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203 | // Remove the moving classifier
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204 | remove (classifier);
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205 | // Retrieve the first classifier
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206 | Classifier first_classifier = (Classifier) getElementAt (0);
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207 | // Add the moving classifier before the first classifier
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208 | addBefore (classifier, first_classifier);
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209 | first_classifier = null;
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210 | }
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211 | else {
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212 | // Remove the moving classifier
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213 | remove (classifier);
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214 | // And add after last classifier
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215 | add (getSize (), classifier);
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216 | }
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217 | }
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218 | else {
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219 | // Try to move the classifier one step in the desired direction.
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220 | int index = indexOf (classifier);
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221 | ///ystem.err.println("Index of " + classifier + " = " + index);
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222 | if(direction) {
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223 | index--;
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224 | if(index < 0) {
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225 | String args[] = new String[2];
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226 | args[0] = Dictionary.get ("CDM.ClassifierManager.Classifier");
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227 | args[1] = classifier.getName ();
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228 | JOptionPane.showMessageDialog (Gatherer.g_man, Dictionary.get ("CDM.Move.At_Top", args), Dictionary.get ("CDM.Move.Title"), JOptionPane.ERROR_MESSAGE);
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229 | return;
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230 | }
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231 | remove (classifier);
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232 | add (index, classifier);
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233 | }
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234 | else {
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235 | index++;
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236 | if(index >= getSize ()) {
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237 | String args[] = new String[2];
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238 | args[0] = Dictionary.get ("CDM.ClassifierManager.Classifier_Str");
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239 | args[1] = classifier.getName ();
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240 | JOptionPane.showMessageDialog (Gatherer.g_man, Dictionary.get ("CDM.Move.At_Bottom", args), Dictionary.get ("CDM.Move.Title"), JOptionPane.ERROR_MESSAGE);
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241 | return;
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242 | }
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243 | remove (classifier);
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244 | add (index, classifier);
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245 | }
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246 | }
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247 |
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248 | // tell the format manager to update the names of its format statements
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249 | Gatherer.c_man.getCollection ().cdm.format_manager.refresh ();
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250 | }
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251 |
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252 | /** This method removes an assigned classifier. I was tempted to call it unassign, but remove is more consistant. Note that there is no way to remove a classifier from the library.
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253 | * @param classifier The Classifier to remove
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254 | * @see org.greenstone.gatherer.cdm.DynamicListModel
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255 | */
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256 | private void removeClassifier (Classifier classifier) {
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257 | remove (classifier);
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258 | // tell the format manager to update the names of its format statements
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259 | Gatherer.c_man.getCollection ().cdm.format_manager.refresh ();
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260 |
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261 | }
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262 | // When remove, move, and add(assign) classifiers, this method has to be called to get the feature combobox
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263 | // on the 'format feature' panel of the 'format' panel up to date.
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264 | // private void informFormatManager() {
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265 | // //this is really to call the gainFocus() method
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266 | // CollectionDesignManager.format_manager.getControls();
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267 | // }
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268 |
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269 | /** A class which provides controls for assigned and editing classifiers. */
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270 | private class ClassifierControl
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271 | extends JPanel
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272 | implements Control {
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273 | /** A combobox containing all of the known classifiers, including those that may have already been assigned. */
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274 | private JComboBox classifier_combobox = null;
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275 | /** Button for adding classifiers. */
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276 | private JButton add = null;
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277 | /** Button for configuring the selected classifier. */
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278 | private JButton configure = null;
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279 | private JButton move_down_button;
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280 | private JButton move_up_button;
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281 |
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282 | /** Button to remove the selected classifier. */
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283 | private JButton remove = null;
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284 |
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285 | /** A list of assigned classifiers. */
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286 | private JList classifier_list = null;
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287 |
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288 | /** Constructor.
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289 | * @see org.greenstone.gatherer.cdm.ClassifierManager.ClassifierControl.AddListener
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290 | * @see org.greenstone.gatherer.cdm.ClassifierManager.ClassifierControl.ConfigureListener
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291 | * @see org.greenstone.gatherer.cdm.ClassifierManager.ClassifierControl.RemoveListener
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292 | */
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293 | public ClassifierControl () {
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294 | // Create
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295 | this.setComponentOrientation(Dictionary.getOrientation());
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296 | add = new GLIButton (Dictionary.get ("CDM.ClassifierManager.Add"), Dictionary.get ("CDM.ClassifierManager.Add_Tooltip"));
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297 |
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298 | JPanel button_pane = new JPanel ();
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299 | button_pane.setComponentOrientation(Dictionary.getOrientation());
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300 | JPanel central_pane = new JPanel ();
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301 | central_pane.setComponentOrientation(Dictionary.getOrientation());
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302 |
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303 | configure = new GLIButton (Dictionary.get ("CDM.ClassifierManager.Configure"), Dictionary.get ("CDM.ClassifierManager.Configure_Tooltip"));
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304 | configure.setEnabled (false);
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305 |
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306 | JPanel header_pane = new DesignPaneHeader ("CDM.GUI.Classifiers", "classifiers");
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307 |
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308 | ClassifierComboboxListener ccl = new ClassifierComboboxListener ();
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309 | classifier_combobox = new JComboBox (getAvailableClassifiers ());
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310 | classifier_combobox.setComponentOrientation(Dictionary.getOrientation());
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311 | classifier_combobox.setOpaque (!Utility.isMac ());
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312 | classifier_combobox.setEditable (false);
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313 | if(classifier_combobox.getItemCount () > 0) {
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314 | if (default_classifier!=null) {
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315 | classifier_combobox.setSelectedItem(default_classifier);
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316 | } else {
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317 | classifier_combobox.setSelectedIndex (0);
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318 | }
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319 | ccl.itemStateChanged (new ItemEvent (classifier_combobox, 0, null, ItemEvent.SELECTED));
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320 | }
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321 |
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322 | JLabel classifier_label = new JLabel (Dictionary.get ("CDM.ClassifierManager.Classifier"));
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323 | classifier_label.setComponentOrientation(Dictionary.getOrientation());
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324 |
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325 | classifier_list = new JList (model);
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326 | classifier_list.setComponentOrientation(Dictionary.getOrientation());
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327 |
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328 | classifier_list.setOpaque (true);
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329 | classifier_list.setSelectionMode (ListSelectionModel.SINGLE_SELECTION);
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330 | JLabel classifier_list_label = new JLabel (Dictionary.get ("CDM.ClassifierManager.Assigned"));
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331 | classifier_list_label.setComponentOrientation(Dictionary.getOrientation());
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332 |
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333 | classifier_list_label.setOpaque (true);
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334 |
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335 | JPanel classifier_list_pane = new JPanel ();
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336 | classifier_list_pane.setComponentOrientation(Dictionary.getOrientation());
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337 |
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338 | JPanel classifier_pane = new JPanel ();
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339 | classifier_pane.setComponentOrientation(Dictionary.getOrientation());
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340 | remove = new GLIButton (Dictionary.get ("CDM.ClassifierManager.Remove"), Dictionary.get ("CDM.ClassifierManager.Remove_Tooltip"));
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341 | remove.setEnabled (false);
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342 |
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343 | JPanel temp = new JPanel (new BorderLayout ());
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344 | temp.setComponentOrientation(Dictionary.getOrientation());
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345 |
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346 | JPanel move_button_pane = new JPanel ();
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347 | move_button_pane.setComponentOrientation(Dictionary.getOrientation());
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348 |
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349 | move_up_button = new GLIButton (Dictionary.get ("CDM.Move.Move_Up"), JarTools.getImage ("arrow-up.gif"), Dictionary.get ("CDM.Move.Move_Up_Tooltip"));
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350 | move_up_button.setEnabled (false);
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351 |
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352 | move_down_button = new GLIButton (Dictionary.get ("CDM.Move.Move_Down"), JarTools.getImage ("arrow-down.gif"), Dictionary.get ("CDM.Move.Move_Down_Tooltip"));
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353 | move_down_button.setEnabled (false);
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354 |
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355 | // Listeners
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356 | add.addActionListener (new AddListener ());
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357 | classifier_combobox.addItemListener (ccl);
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358 | configure.addActionListener (new ConfigureListener ());
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359 | remove.addActionListener (new RemoveListener ());
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360 | remove.addActionListener (CollectionDesignManager.buildcol_change_listener);
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361 | classifier_list.addMouseListener (new ClickListener ());
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362 | classifier_list.addListSelectionListener (new ListListener ());
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363 | ccl = null;
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364 |
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365 | MoveListener ml = new MoveListener ();
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366 | move_down_button.addActionListener (ml);
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367 | move_down_button.addActionListener (CollectionDesignManager.buildcol_change_listener);
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368 | move_up_button.addActionListener (ml);
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369 | move_up_button.addActionListener (CollectionDesignManager.buildcol_change_listener);
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370 |
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371 | // Layout
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372 | JPanel tmp;
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373 | move_button_pane.setLayout (new GridLayout (4,1));
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374 | move_button_pane.add (move_up_button);
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375 | tmp = new JPanel ();
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376 | tmp.setComponentOrientation(Dictionary.getOrientation());
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377 | move_button_pane.add (tmp);
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378 | tmp = new JPanel ();
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379 | tmp.setComponentOrientation(Dictionary.getOrientation());
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380 | move_button_pane.add (tmp);
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381 | move_button_pane.add (move_down_button);
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382 |
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383 | classifier_list_label.setBorder (BorderFactory.createEmptyBorder (0,2,0,2));
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384 |
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385 | classifier_list_pane.setLayout (new BorderLayout ());
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386 | classifier_list_pane.add (classifier_list_label, BorderLayout.NORTH);
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387 | classifier_list_pane.add (new JScrollPane (classifier_list), BorderLayout.CENTER);
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388 | classifier_list_pane.add (move_button_pane, BorderLayout.LINE_END);
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389 |
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390 | classifier_label.setBorder (BorderFactory.createEmptyBorder (0,0,5,0));
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391 |
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392 | classifier_pane.setBorder (BorderFactory.createEmptyBorder (5,0,5,0));
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393 | classifier_pane.setLayout (new BorderLayout (5,0));
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394 | classifier_pane.add (classifier_label, BorderLayout.LINE_START);
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395 | classifier_pane.add (classifier_combobox, BorderLayout.CENTER);
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396 |
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397 | button_pane.setLayout (new GridLayout (1, 3));
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398 | button_pane.add (add);
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399 | button_pane.add (configure);
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400 | button_pane.add (remove);
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401 |
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402 | temp.add (classifier_pane, BorderLayout.NORTH);
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403 | temp.add (button_pane, BorderLayout.SOUTH);
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404 |
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405 | central_pane.setBorder (BorderFactory.createEmptyBorder (5,0,0,0));
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406 | central_pane.setLayout (new BorderLayout ());
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407 | central_pane.add (classifier_list_pane, BorderLayout.CENTER);
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408 | central_pane.add (temp, BorderLayout.SOUTH);
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409 |
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410 | setBorder (BorderFactory.createEmptyBorder (0,5,0,0));
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411 | setLayout (new BorderLayout ());
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412 | add (header_pane, BorderLayout.NORTH);
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413 | add (central_pane, BorderLayout.CENTER);
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414 | }
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415 |
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416 | /** Method which acts like a destructor, tidying up references to persistant objects.
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417 | */
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418 | public void destroy () {
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419 | add = null;
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420 | classifier_combobox = null;
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421 | classifier_list = null;
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422 | configure = null;
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423 | //instructions = null;
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424 | remove = null;
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425 | }
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426 |
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427 | public void gainFocus () {
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428 | }
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429 |
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430 | public void loseFocus () {
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431 | }
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432 |
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433 |
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434 | private class AddListener
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435 | implements ActionListener {
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436 | public void actionPerformed (ActionEvent event) {
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437 | if (classifier_combobox.getSelectedItem () != null) {
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438 | // This must be done on a new thread for the remote building code
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439 | new AddClassifierTask (classifier_combobox.getSelectedItem ().toString ()).start ();
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440 | }
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441 | }
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442 | }
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443 |
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444 |
|
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445 | private class AddClassifierTask
|
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446 | extends Thread {
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447 | private String classifier_name;
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448 |
|
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449 | public AddClassifierTask (String classifier_name) {
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450 | this.classifier_name = classifier_name;
|
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451 | }
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452 |
|
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453 | public void run () {
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454 | // Retrieve the classifier
|
---|
455 | Classifier classifier = Classifiers.getClassifier (classifier_name, true);
|
---|
456 | if (classifier == null) {
|
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457 | System.err.println ("Error: getClassifier() returned null.");
|
---|
458 | return;
|
---|
459 | }
|
---|
460 |
|
---|
461 | // Create a new element in the DOM
|
---|
462 | Element new_classifier_element = CollectionConfiguration.createElement (StaticStrings.CLASSIFY_ELEMENT);
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463 | new_classifier_element.setAttribute (StaticStrings.TYPE_ATTRIBUTE, classifier.getName ());
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464 |
|
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465 | Classifier new_classifier = new Classifier (new_classifier_element, classifier);
|
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466 |
|
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467 | ArgumentConfiguration ac = new ArgumentConfiguration (new_classifier);
|
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468 | ac.addOKButtonActionListener (CollectionDesignManager.buildcol_change_listener);
|
---|
469 | if (ac.display ()) {
|
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470 | assignClassifier (new_classifier);
|
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471 | classifier_list.setSelectedValue (new_classifier, true);
|
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472 | }
|
---|
473 | }
|
---|
474 | }
|
---|
475 |
|
---|
476 |
|
---|
477 | /** This listener reacts to changes in the current selection of the classifier combobox. */
|
---|
478 | private class ClassifierComboboxListener
|
---|
479 | implements ItemListener {
|
---|
480 | /** When a user selects a certain classifier, update the tooltip to show the classifier description. */
|
---|
481 | public void itemStateChanged (ItemEvent event) {
|
---|
482 | if(event.getStateChange () == ItemEvent.SELECTED) {
|
---|
483 | // Retrieve the selected classifier
|
---|
484 | Classifier current_selection = (Classifier) classifier_combobox.getSelectedItem ();
|
---|
485 | // And reset the tooltip.
|
---|
486 | classifier_combobox.setToolTipText (Utility.formatHTMLWidth (current_selection.getDescription (), 40));
|
---|
487 | current_selection = null;
|
---|
488 | }
|
---|
489 | }
|
---|
490 | }
|
---|
491 |
|
---|
492 |
|
---|
493 | /** Listens for double clicks apon the list and react as if the configure button was pushed. */
|
---|
494 | private class ClickListener
|
---|
495 | extends MouseAdapter {
|
---|
496 | /** Called whenever the mouse is clicked over a registered component, we use this to chain through to the configure prompt.
|
---|
497 | * @param event A <strong>MouseEvent</strong> containing information about the mouse click.
|
---|
498 | */
|
---|
499 | public void mouseClicked (MouseEvent event) {
|
---|
500 | if(event.getClickCount () == 2 ) {
|
---|
501 | if(!classifier_list.isSelectionEmpty ()) {
|
---|
502 | Classifier classifier = (Classifier) classifier_list.getSelectedValue ();
|
---|
503 | ArgumentConfiguration ac = new ArgumentConfiguration (classifier);
|
---|
504 | ac.addOKButtonActionListener (CollectionDesignManager.buildcol_change_listener);
|
---|
505 | if (ac.display ()) {
|
---|
506 | refresh (classifier);
|
---|
507 | }
|
---|
508 | ac.destroy ();
|
---|
509 | ac = null;
|
---|
510 | }
|
---|
511 | }
|
---|
512 | }
|
---|
513 | }
|
---|
514 |
|
---|
515 | /** This class listens for actions upon the configure button in the controls, and if detected creates a new ArgumentConfiguration dialog box to allow for configuration.
|
---|
516 | */
|
---|
517 | private class ConfigureListener
|
---|
518 | implements ActionListener {
|
---|
519 | /** Any implementation of <i>ActionListener</i> must include this method so that we can be informed when an action has occured on one of our target controls.
|
---|
520 | * @param event An <strong>ActionEvent</strong> containing information garnered from the control action.
|
---|
521 | * @see org.greenstone.gatherer.cdm.ArgumentConfiguration
|
---|
522 | * @see org.greenstone.gatherer.cdm.Classifier
|
---|
523 | */
|
---|
524 | public void actionPerformed (ActionEvent event) {
|
---|
525 | if(!classifier_list.isSelectionEmpty ()) {
|
---|
526 | Classifier classifier = (Classifier) classifier_list.getSelectedValue ();
|
---|
527 | ArgumentConfiguration ac = new ArgumentConfiguration (classifier);
|
---|
528 | ac.addOKButtonActionListener (CollectionDesignManager.buildcol_change_listener);
|
---|
529 | if (ac.display ()) {
|
---|
530 | refresh (classifier);
|
---|
531 | }
|
---|
532 | ac.destroy ();
|
---|
533 | ac = null;
|
---|
534 | }
|
---|
535 | }
|
---|
536 | }
|
---|
537 |
|
---|
538 | /** listens for changes in the list selection and enables the configure and remove buttons if there is a selection, disables them if there is no selection */
|
---|
539 | private class ListListener
|
---|
540 | implements ListSelectionListener {
|
---|
541 |
|
---|
542 | public void valueChanged (ListSelectionEvent e) {
|
---|
543 | if (!e.getValueIsAdjusting ()) { // we get two events for one change in list selection - use the false one ( the second one)
|
---|
544 | if (classifier_list.isSelectionEmpty ()) {
|
---|
545 | move_up_button.setEnabled (false);
|
---|
546 | move_down_button.setEnabled (false);
|
---|
547 | configure.setEnabled (false);
|
---|
548 | remove.setEnabled (false);
|
---|
549 | }
|
---|
550 | else {
|
---|
551 | configure.setEnabled (true);
|
---|
552 | remove.setEnabled (true);
|
---|
553 | int selected_index = classifier_list.getSelectedIndex ();
|
---|
554 | move_up_button.setEnabled (selected_index !=0);
|
---|
555 | move_down_button.setEnabled (selected_index != model.getSize ()-1);
|
---|
556 | }
|
---|
557 | }
|
---|
558 | }
|
---|
559 | }
|
---|
560 |
|
---|
561 | /** Listens for actions apon the move buttons in the manager controls, and if detected calls the <i>moveClassifier()</i> method of the manager with the appropriate details. */
|
---|
562 | private class MoveListener
|
---|
563 | implements ActionListener {
|
---|
564 | /** Any implementation of <i>ActionListener</i> must include this method so that we can be informed when an action has occured on one of our target controls.
|
---|
565 | * @param event An <strong>ActionEvent</strong> containing information garnered from the control action.
|
---|
566 | */
|
---|
567 | public void actionPerformed (ActionEvent event) {
|
---|
568 | if(!classifier_list.isSelectionEmpty ()) {
|
---|
569 | Object object = classifier_list.getSelectedValue ();
|
---|
570 | if(object instanceof Classifier) {
|
---|
571 | Classifier classifier = (Classifier) object;
|
---|
572 | if(event.getSource () == move_up_button) {
|
---|
573 | moveClassifier (classifier, true, false);
|
---|
574 | }
|
---|
575 | else if(event.getSource () == move_down_button) {
|
---|
576 | moveClassifier (classifier, false, false);
|
---|
577 | }
|
---|
578 | classifier_list.setSelectedValue (classifier, true);
|
---|
579 | }
|
---|
580 | }
|
---|
581 | }
|
---|
582 | }
|
---|
583 |
|
---|
584 | /** This class listens for actions upon the remove button in the controls, and if detected calls the <i>removeClassifier()</i> method.
|
---|
585 | */
|
---|
586 | private class RemoveListener
|
---|
587 | implements ActionListener {
|
---|
588 | /** Any implementation of <i>ActionListener</i> must include this method so that we can be informed when an action has occured on one of our target controls.
|
---|
589 | * @param event An <strong>ActionEvent</strong> containing information garnered from the control action.
|
---|
590 | */
|
---|
591 | public void actionPerformed (ActionEvent event) {
|
---|
592 | if(classifier_list.isSelectionEmpty ()) {
|
---|
593 | remove.setEnabled (false);
|
---|
594 | return;
|
---|
595 | }
|
---|
596 | int selected_index = classifier_list.getSelectedIndex ();
|
---|
597 | Object selected_classifier = classifier_list.getSelectedValue ();
|
---|
598 | if (!(selected_classifier instanceof Classifier)) {
|
---|
599 | return; // what else could we have here???
|
---|
600 | }
|
---|
601 | removeClassifier ((Classifier)selected_classifier);
|
---|
602 |
|
---|
603 | if (selected_index >= classifier_list.getModel ().getSize ()) {
|
---|
604 | selected_index--;
|
---|
605 | }
|
---|
606 | if (selected_index >=0) {
|
---|
607 | classifier_list.setSelectedIndex (selected_index);
|
---|
608 | } else {
|
---|
609 | // no more classifiers in the list
|
---|
610 | remove.setEnabled (false);
|
---|
611 | }
|
---|
612 | }
|
---|
613 | }
|
---|
614 | }
|
---|
615 | }
|
---|