source: trunk/gli/src/org/greenstone/gatherer/gui/combobox/GComboBoxModel.java@ 4366

/**
 *#########################################################################
 *
 * A component of the Gatherer application, part of the Greenstone digital
 * library suite from the New Zealand Digital Library Project at the
 * University of Waikato, New Zealand.
 *
 * <BR><BR>
 *
 * Author: John Thompson, Greenstone Digital Library, University of Waikato
 *
 * <BR><BR>
 *
 * Copyright (C) 1999 New Zealand Digital Library Project
 *
 * <BR><BR>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * <BR><BR>
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * <BR><BR>
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *########################################################################
 */

 




package org.greenstone.gatherer.gui.combobox;

import java.util.Collections;
import java.util.Hashtable;
import java.util.Vector;

import javax.swing.AbstractListModel;
import javax.swing.MutableComboBoxModel;
import org.greenstone.gatherer.msm.ElementWrapper;
import org.w3c.dom.Element;

public class GComboBoxModel
    extends AbstractListModel
    implements MutableComboBoxModel {

    // Data.
    private boolean   isMetadataElement = false;

    private Hashtable name_to_element   = new Hashtable();

    private Object    selected_item     = null;

    private Vector    contents          = new Vector();

    public GComboBoxModel() {
    }

    public GComboBoxModel(Vector contents) {
    this.contents = contents;
    Collections.sort(contents);
    }

    public GComboBoxModel(Vector elements, boolean isMetadataElement) {
    this.isMetadataElement = isMetadataElement;
    for(int i = 0; i < elements.size(); i++) {
        ElementWrapper element = (ElementWrapper)elements.get(i);
        contents.add(element.toString());
        name_to_element.put(element.toString(), element);
    }
    Collections.sort(contents);
    }

    private boolean contains(Vector vector, Object key) {
    for(int i = 0; i < vector.size(); i++) {
        if(vector.get(i).toString().equals(key.toString())) {
        return true;
        }
    }
    return false;
    }

    // Methods.
    public void addElement(Object obj) {
    if(!contents.contains(obj)) {
        contents.add(obj);
        Collections.sort(contents);
        refresh();
    }
    }

    public Object getElementAt(int index) {
    return contents.get(index);
    }

    public Object getSelectedItem() {
    return selected_item;
    }

    public ElementWrapper getSelectedMetadata() {
    if(isMetadataElement) {
        return (ElementWrapper)name_to_element.get(selected_item);
    }
    return null;
    }

    public int getSize() {
    return contents.size();
    }

    public void insertElementAt(Object obj, int index) {
    contents.add(index, obj);
    fireIntervalAdded(this, index, index);
    }

    public void refresh() {
    fireContentsChanged(this, 0, getSize());
    }

    public void removeElement(Object obj) {
    int index = contents.indexOf(obj);
    contents.remove(index);
    fireIntervalRemoved(this, index, index);
    }

    public void removeElementAt(int index) {
    contents.remove(index);
    fireIntervalRemoved(this, index, index);
    }

    public void setSelectedItem(Object obj) {
    selected_item = obj;
    int index = contents.indexOf(obj);
    fireContentsChanged(this, index, index);
    }
}