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 | * <BR><BR>
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9 | *
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10 | * Author: Shaoqun Wu, Greenstone Digital Library, University of Waikato
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11 | *
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12 | * <BR><BR>
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13 | *
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14 | * Copyright (C) 2006 New Zealand Digital Library Project
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15 | *
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16 | * <BR><BR>
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17 | *
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18 | * This program is free software; you can redistribute it and/or modify
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19 | * it under the terms of the GNU General Public License as published by
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20 | * the Free Software Foundation; either version 2 of the License, or
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21 | * (at your option) any later version.
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22 | *
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23 | * <BR><BR>
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24 | *
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25 | * This program is distributed in the hope that it will be useful,
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26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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28 | * GNU General Public License for more details.
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29 | *
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30 | * <BR><BR>
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31 | *
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32 | * You should have received a copy of the GNU General Public License
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33 | * along with this program; if not, write to the Free Software
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34 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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35 | *########################################################################
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36 | */
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37 | package org.greenstone.gatherer.gems;
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38 |
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39 | import org.w3c.dom.Document;
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40 |
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41 | import java.awt.*;
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42 | import java.awt.event.*;
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43 | import javax.swing.*;
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44 | import javax.swing.tree.*;
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45 |
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46 | import java.util.Observer;
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47 | import java.util.Observable;
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48 | import java.util.ArrayList;
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49 |
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50 | import org.greenstone.gatherer.Configuration;
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51 | import org.greenstone.gatherer.Dictionary;
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52 |
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53 | /**
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54 | * @author Shaoqun Wu, Greenstone Digital Library, University of Waikato
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55 | * @version 2.4
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56 | */
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57 | public class MetadataSetTree
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58 | extends JTree
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59 | implements Observer, ActionListener, MouseListener {
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60 |
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61 | private MetadataSetTree self;
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62 | private MetadataSetModel metadata_model;
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63 | protected JFrame parent_frame;
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64 | public MetadataSetTree(JFrame parent){
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65 | this.setComponentOrientation(Dictionary.getOrientation());
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66 | setCellRenderer(new MetadataSetCellRenderer());
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67 | setRowHeight(20);
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68 | setEditable(false);
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69 | getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
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70 | setModel(null);
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71 | self = this;
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72 | parent_frame = parent;
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73 | addMouseListener(this);
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74 | }
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75 |
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76 | public void mouseClicked(MouseEvent event) {
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77 | // right click
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78 | if (SwingUtilities.isRightMouseButton(event)) {
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79 | new MetadataSetTreeRightClickMenu(this, event);
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80 | } else {
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81 | TreePath tse = self.getSelectionPath();
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82 | if (tse!=null){
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83 | DefaultMutableTreeNode snode= (DefaultMutableTreeNode)tse.getLastPathComponent();
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84 |
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85 | Object data = snode.getUserObject();
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86 |
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87 | if (data instanceof MetadataElementModel){
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88 |
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89 | ((MetadataElementModel)data).notifyListeners(false);
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90 | }
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91 | else{
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92 | if (data instanceof MetadataSetInfo){
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93 | ((MetadataSetInfo)data).notifyListeners();
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94 | }
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95 | }
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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 |
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101 | public void mouseEntered(MouseEvent event) { }
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102 |
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103 | public void mouseExited(MouseEvent event) { }
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104 |
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105 | public void mousePressed(MouseEvent event) { }
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106 |
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107 | public void mouseReleased(MouseEvent event) { }
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108 |
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109 | public void update(Observable o,Object arg){
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110 | if (arg !=null){
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111 | Boolean replaceModel = (Boolean)arg;
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112 | if (!replaceModel.booleanValue()){
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113 | repaint();
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114 | expandAll();
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115 | }
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116 | }
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117 | metadata_model = (MetadataSetModel)o;
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118 |
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119 | populateMetadataSetTree(metadata_model);
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120 |
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121 | }
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122 |
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123 | private void expandAll() {
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124 | int row = 0;
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125 | while (row < getRowCount()) {
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126 | expandRow(row);
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127 | row++;
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128 | }
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129 | }
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130 |
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131 |
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132 |
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133 | public void actionPerformed(ActionEvent e){
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134 | String command = e.getActionCommand();
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135 |
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136 | if (command.equals(GEMSConstants.ADD_ELEMENT)){
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137 | addElement(false);
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138 | return ;
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139 | }
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140 | if (command.equals(GEMSConstants.ADD_SUBELEMENT)){
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141 | addElement(true);
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142 | return ;
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143 | }
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144 |
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145 | if (command.equals(GEMSConstants.DELETE_ELEMENT)){
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146 | deleteElement();
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147 | }
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148 |
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149 |
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150 | if (command.equals(GEMSConstants.MOVE_UP)){
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151 | moveUpElement();
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152 | }
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153 |
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154 | if (command.equals(GEMSConstants.MOVE_DOWN)){
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155 | moveDownElement();
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156 | }
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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 | public void addElement(boolean subelement){
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162 | TreePath tse = self.getSelectionPath();
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163 | if (tse == null) return;
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164 |
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165 | DefaultTreeModel dtm = (DefaultTreeModel)getModel();
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166 | DefaultMutableTreeNode snode=(DefaultMutableTreeNode)tse.getLastPathComponent();
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167 | Object data = snode.getUserObject();
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168 | if (data instanceof MetadataSetInfo){
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169 | data = metadata_model;
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170 | }
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171 | NewMetadataElementNamePrompt name_prompt = new NewMetadataElementNamePrompt(parent_frame, subelement, data);
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172 | if (name_prompt.isCancelled()) {
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173 | return;
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174 | }
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175 | String new_name = name_prompt.getName();
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176 |
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177 | MetadataElementModel element_model = new MetadataElementModel(metadata_model.getMetadataSetInfo(), new_name);
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178 | DefaultMutableTreeNode new_node = new DefaultMutableTreeNode(element_model);
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179 | dtm.insertNodeInto(new_node,snode,snode.getChildCount());
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180 | //update model
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181 | if (data instanceof MetadataElementModel){
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182 | ((MetadataElementModel) data).addChild(element_model);
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183 | }
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184 | else if(data instanceof MetadataSetModel){
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185 | ((MetadataSetModel)data).addChild(element_model);
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186 |
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187 | }
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188 |
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189 |
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190 | dtm.reload(snode);
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191 | expandPath(tse);
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192 | tse = tse.pathByAddingChild(new_node);
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193 | self.setSelectionPath(tse);
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194 | element_model.notifyListeners(false);
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195 | }
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196 |
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197 |
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198 |
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199 | public void deleteElement(){
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200 |
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201 | //int result = JOptionPane.showConfirmDialog(null, Dictionary.get("GEMS.Confirm_DeleteElement", "(Put name here)"), Dictionary.get("GEMS.Confirm_DeleteElement_Title"), JOptionPane.OK_CANCEL_OPTION);
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202 | //if (result != JOptionPane.OK_OPTION) return;
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203 |
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204 | TreePath tse = self.getSelectionPath();
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205 |
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206 | if (tse!=null){
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207 | DefaultTreeModel dtm = (DefaultTreeModel)getModel();
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208 | DefaultMutableTreeNode snode=(DefaultMutableTreeNode)tse.getLastPathComponent();
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209 | DefaultMutableTreeNode parent = (DefaultMutableTreeNode) snode.getParent();
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210 | snode.removeFromParent();
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211 |
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212 | Object parent_data = parent.getUserObject();
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213 | Object data = snode.getUserObject();
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214 | MetadataElementModel selected_model = null;
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215 | if (parent_data instanceof MetadataElementModel){
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216 | MetadataElementModel parent_model = (MetadataElementModel) parent_data;
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217 | selected_model = (MetadataElementModel) data;
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218 | parent_model.removeChild(selected_model);
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219 | parent_model.notifyListeners(false);
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220 | }
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221 | else{
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222 | if(parent_data instanceof MetadataSetInfo){
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223 | selected_model = (MetadataElementModel) data;
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224 | metadata_model.removeChild(selected_model);
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225 | ((MetadataSetInfo)parent_data).notifyListeners();
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226 |
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227 | }
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228 | }
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229 |
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230 | dtm.reload(parent);
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231 | self.setSelectionPath(tse.getParentPath());
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232 | //selected_model.notifyListeners(true);// notify its listeners that it's been deleted
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233 | }
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234 |
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235 | }
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236 |
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237 | private void moveUpElement(){
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238 | TreePath tse = self.getSelectionPath();
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239 |
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240 | if (tse!=null){
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241 | DefaultMutableTreeNode snode= (DefaultMutableTreeNode)tse.getLastPathComponent();
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242 | int row = getSelectionRows()[0];
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243 | boolean moved = false;
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244 |
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245 | Object data = snode.getUserObject();
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246 |
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247 | if (data instanceof MetadataElementModel){
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248 | MetadataElementModel element_model = (MetadataElementModel)data;
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249 | //top level element
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250 | if (element_model.getParent() == null){
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251 | moved = metadata_model.moveUp(element_model);
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252 |
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253 | }
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254 | else{
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255 | MetadataElementModel parent = element_model.getParent();
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256 | moved = parent.moveUp(element_model);
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257 | }
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258 | if (moved){
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259 | DefaultTreeModel dtm = (DefaultTreeModel)getModel();
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260 | DefaultMutableTreeNode pnode= (DefaultMutableTreeNode) snode.getParent();
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261 | int index = pnode.getIndex(snode);
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262 | dtm.removeNodeFromParent(snode);
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263 | dtm.insertNodeInto(snode,pnode,--index);
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264 | dtm.reload(pnode);
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265 | setSelectionRow(--row);
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266 | }
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267 | }
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268 | }
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269 |
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270 | }
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271 |
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272 | private void moveDownElement(){
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273 | TreePath tse = self.getSelectionPath();
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274 |
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275 | if (tse!=null){
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276 | boolean moved = false;
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277 | DefaultMutableTreeNode snode= (DefaultMutableTreeNode)tse.getLastPathComponent();
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278 | int row = getSelectionRows()[0];
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279 | Object data = snode.getUserObject();
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280 |
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281 | if (data instanceof MetadataElementModel){
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282 | MetadataElementModel element_model = (MetadataElementModel)data;
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283 | //top level element
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284 | if (element_model.getParent() == null){
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285 | moved = metadata_model.moveDown(element_model);
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286 | }
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287 | else{
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288 | MetadataElementModel parent = element_model.getParent();
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289 | moved = parent.moveDown(element_model);
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290 | }
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291 | // move the node down the tree
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292 | if (moved){
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293 | DefaultTreeModel dtm = (DefaultTreeModel)getModel();
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294 | DefaultMutableTreeNode pnode= (DefaultMutableTreeNode) snode.getParent();
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295 | int index = pnode.getIndex(snode);
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296 | dtm.removeNodeFromParent(snode);
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297 | dtm.insertNodeInto(snode,pnode,++index);
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298 | dtm.reload(pnode);
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299 | setSelectionRow(++row);
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300 | }
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301 | }
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302 | }
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303 | }
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304 |
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305 |
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306 | private void populateMetadataSetTree(MetadataSetModel metadata_model){
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307 | setModel(null);
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308 | MetadataSetInfo info= metadata_model.getMetadataSetInfo();
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309 | if (info == null) {
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310 | repaint();
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311 |
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312 | return;
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313 | }
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314 |
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315 | ArrayList metadata_elements = metadata_model.getMetadataSetModel();
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316 |
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317 | DefaultTreeModel dtm = new DefaultTreeModel(new DefaultMutableTreeNode(info));
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318 | DefaultMutableTreeNode root = (DefaultMutableTreeNode)dtm.getRoot();
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319 |
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320 | for(int i=0;i <metadata_elements.size();i++){
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321 | MetadataElementModel element_model = (MetadataElementModel)metadata_elements.get(i);
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322 | DefaultMutableTreeNode element = new DefaultMutableTreeNode(element_model);
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323 | dtm.insertNodeInto(element,root,root.getChildCount());
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324 | ArrayList subelements = element_model.getChildElements();
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325 | for(int j=0;j <subelements.size();j++){
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326 | MetadataElementModel subelement_model = (MetadataElementModel)subelements.get(j);
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327 | DefaultMutableTreeNode subelement = new DefaultMutableTreeNode(subelement_model);
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328 | dtm.insertNodeInto(subelement,element,element.getChildCount());
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329 | }
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330 | }
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331 |
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332 | dtm.reload(root);
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333 | setModel(dtm);
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334 |
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335 | }
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336 |
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337 | private class MetadataSetTreeRightClickMenu
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338 | extends JPopupMenu {
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339 |
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340 | private MetadataSetTreeRightClickMenu(MetadataSetTree meta_set_tree,
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341 | MouseEvent event)
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342 | {
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343 |
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344 | super();
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345 |
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346 | // the right click position
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347 | boolean root_node = false;
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348 | boolean element_node = false;
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349 | TreePath root_path = meta_set_tree.getPathForRow(0);
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350 | TreePath right_click_path = meta_set_tree.getPathForLocation(event.getX(), event.getY());
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351 | if (right_click_path == null) {
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352 | right_click_path = root_path;
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353 | root_node = true;
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354 | } else if (right_click_path.equals(root_path)) {
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355 | root_node = true;
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356 | } else if (right_click_path.getParentPath().equals(root_path)) {
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357 | element_node = true;
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358 | } // else its a subelement
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359 |
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360 | meta_set_tree.clearSelection();
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361 | meta_set_tree.setSelectionPath(right_click_path);
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362 |
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363 | JMenuItem add_element = new JMenuItem();
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364 | if (root_node) {
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365 | add_element.setText(Dictionary.get("GEMS.Popup.AddElement"));
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366 | add_element.setActionCommand(GEMSConstants.ADD_ELEMENT);
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367 | } else {
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368 | add_element.setText(Dictionary.get("GEMS.Popup.AddSubElement"));
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369 | add_element.setActionCommand(GEMSConstants.ADD_SUBELEMENT);
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370 |
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371 | }
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372 | add_element.addActionListener(meta_set_tree);
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373 | add(add_element);
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374 | if (!root_node) {
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375 | // delete element also
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376 | JMenuItem delete_element = new JMenuItem();
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377 | if (element_node) {
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378 | delete_element.setText(Dictionary.get("GEMS.Popup.DeleteElement"));
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379 | } else {
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380 | delete_element.setText(Dictionary.get("GEMS.Popup.DeleteSubElement"));
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381 | }
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382 | delete_element.addActionListener(meta_set_tree);
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383 | delete_element.setActionCommand(GEMSConstants.DELETE_ELEMENT);
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384 | add(delete_element);
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385 | }
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386 |
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387 | // Show the popup menu on screen
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388 | show(meta_set_tree, event.getX(), event.getY());
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389 | }
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390 |
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391 | }
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392 | }
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393 |
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394 |
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395 | class MetadataSetCellRenderer extends JLabel implements TreeCellRenderer {
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396 |
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397 | private Color SELECTED_COLOR = Color.lightGray;
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398 | private Color SELECTED_BORDER_COLOR = Color.gray;
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399 |
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400 |
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401 | public Component getTreeCellRendererComponent(JTree tree,
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402 | Object value,
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403 | boolean selected,
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404 | boolean expanded,
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405 | boolean leaf,
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406 | int row,
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407 | boolean hasFocus){
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408 |
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409 | DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
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410 | Object userObject = node.getUserObject();
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411 |
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412 | if (userObject instanceof MetadataElementModel){
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413 | MetadataElementModel model = (MetadataElementModel)userObject;
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414 | setText(model.getFullName());
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415 | }
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416 | else{
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417 | if (userObject instanceof MetadataSetInfo){
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418 | MetadataSetInfo info = (MetadataSetInfo)userObject;
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419 | setText(info.getMetadataSetName());
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420 | }
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421 | }
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422 |
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423 | if (selected){
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424 | setBackground(SELECTED_COLOR);
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425 |
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426 | }
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427 | else{
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428 | setBackground(tree.getBackground());
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429 | }
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430 | setForeground(tree.getForeground());
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431 | setOpaque(true);
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432 | return this;
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433 | }
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434 |
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435 | }
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