[4675] | 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: John Thompson, 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) 1999 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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[5590] | 37 | package org.greenstone.gatherer.cdm;
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[4675] | 38 |
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| 39 | /**************************************************************************************
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| 40 | * Title: Gatherer
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| 41 | * Description: The Gatherer: a tool for gathering and enriching a digital collection.
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| 42 | * Company: The University of Waikato
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| 43 | * Written: 20/05/02
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| 44 | * Revised: 03/10/02 - Commented
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| 45 | **************************************************************************************/
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| 46 | import javax.swing.ComboBoxModel;
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| 47 | import javax.swing.DefaultListModel;
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[5590] | 48 |
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[4675] | 49 | /** This class extends the functionality of the DefaultListModel to include simple methods for refreshing the contents of this model if one of its elements changes.
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| 50 | * @author John Thompson, Greenstone Digital Library, University of Waikato
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| 51 | * @version 2.3
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| 52 | */
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| 53 | public class DynamicListModel
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| 54 | extends DefaultListModel
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| 55 | implements ComboBoxModel {
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| 56 |
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| 57 | private boolean auto_order = false;
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| 58 |
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| 59 | private Object object = null;
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| 60 |
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| 61 | public void addElement(Object element) {
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| 62 | if(auto_order) {
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[5590] | 63 | // Insert the object in its alphabetically correct place.
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[4675] | 64 | int position = 0;
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| 65 | boolean found = false;
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| 66 | while(!found && position < size()) {
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| 67 | ///ystem.err.print("Compare " + element.toString() + " to " + get(position).toString() + ": ");
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| 68 | int order = element.toString().compareTo(get(position).toString());
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| 69 | if(order < 0) {
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| 70 | add(position, element);
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| 71 | found = true;
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| 72 | ///ystem.err.println("Greater than. Insert");
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| 73 | }
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| 74 | else if(order == 0) {
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| 75 | found = true;
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| 76 | ///ystem.err.println("Equal. End.");
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| 77 | }
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| 78 | else {
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| 79 | position++;
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| 80 | ///ystem.err.println("Less than. Carry on.");
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| 81 | }
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| 82 | }
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| 83 | if(!found) {
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| 84 | super.addElement(element);
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| 85 | ///ystem.err.println("Out of elements. Insert");
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| 86 | }
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| 87 | }
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| 88 | else {
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| 89 | super.addElement(element);
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| 90 | }
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| 91 | }
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| 92 |
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[5785] | 93 | /* private DynamicListModel shallowCopy() {
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[4675] | 94 | DynamicListModel copy = new DynamicListModel();
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| 95 | copy.setAutoOrder(auto_order);
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| 96 | for(int i = 0; i < size(); i++) {
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| 97 | copy.addElement(get(i));
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| 98 | }
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| 99 | return copy;
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[5785] | 100 | } */
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[4675] | 101 |
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| 102 | public Object getSelectedItem() {
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| 103 | ///ystem.err.println("Get item: " + object);
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| 104 | return object;
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| 105 | }
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| 106 | /** Notify all controls that are based on this list model that its contents have changed, and they should repaint themselves. */
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| 107 | public void refresh() {
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| 108 | fireContentsChanged(this, 0, size());
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| 109 | }
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| 110 |
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| 111 | public void setAutoOrder(boolean auto_order) {
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| 112 | this.auto_order = auto_order;
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| 113 | }
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| 114 |
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| 115 | public void setSelectedItem(Object object) {
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| 116 | ///ystem.err.println("Set item: " + object);
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| 117 | this.object = object;
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| 118 | }
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| 119 | }
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