source: trunk/gli/src/org/greenstone/gatherer/gems/AttributeTableModel.java@ 8270

/**
 *#########################################################################
 *
 * 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.gems;

import java.awt.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
import org.greenstone.gatherer.util.Utility;


/**
 * @author John Thompson, Greenstone Digital Library, University of Waikato
 * @version 2.3
 */
public class AttributeTableModel 
    extends AbstractTableModel {
    private Attribute last_attribute = null;
    private int last_index = -1;
    private int longest[] = null;
    private int column_zero_width = 0;
    private JScrollPane scroll_pane = null;
    private JTable table = null;
    private String default_value = null;
    private String names[] = null;
    private TreeSet attributes = null;
    static final private int table_width = 550;
    public AttributeTableModel(TreeSet attributes, String one, String two, String default_value) {
    super();
    this.attributes = attributes;
    this.default_value = default_value;
    this.longest = new int[2];
    this.names = new String[2];
    names[0] = one;
    names[1] = two;
    }

    public AttributeTableModel(TreeSet attributes, String one, String two, String three, String default_value) {
    super();
    this.attributes = attributes;
    this.default_value = default_value;
    this.longest = new int[3];
    this.names = new String[3];
    names[0] = one;
    names[1] = two;
    names[2] = three;
    }
    public int add(Attribute attribute) {
    attributes.add(attribute);
    // Determine the row index
    boolean found = false;
    int index = 0;
    Iterator iterator = attributes.iterator();
    for(int i = 0; !found && iterator.hasNext(); i++) {
        if(attribute == iterator.next()) {
        found = true;
        index = i;
        }
    }
    // Fire event
    fireTableRowsInserted(index, index);
    return index;
    }

    public boolean contains(String value, int column) {
    boolean result = false;
    Iterator iterator = attributes.iterator();
    while(iterator.hasNext() && !result) {
        Attribute attribute = (Attribute) iterator.next();
        if(value.equals(attribute.get(column))) {
        result = true;
        }
    }  
    return result;
    }

    public Attribute getAttribute(int row) {
    if(row != last_index) {
        last_index = row;
        last_attribute = null;
                // Retrieve the value from the set using its iterator
        Iterator iterator = attributes.iterator();
        for(int i = 0; i < row && iterator.hasNext(); i++) {
        iterator.next();
        }
        if(iterator.hasNext()) {
        last_attribute = (Attribute) iterator.next();
        }
        iterator = null;
    }
    return last_attribute;
    }

    public int getColumnCount() {
    return names.length;
    }

    public String getColumnName(int col) {
    return names[col];
    }

    public int getRowCount() {
    int count = 0;
    if(attributes != null) {
        count = attributes.size();
    }
    return count;
    }

    public Object getValueAt(int row, int col) {
    String value = null;
    Attribute attribute = getAttribute(row);
    if(attribute != null) {
        value = attribute.get(col);
    }
    if(value == null) {
        value = default_value;
    }
    // Update table column width if necessary
    if(value.length() > longest[col]) {
        Component component = table.getCellRenderer(row, col).getTableCellRendererComponent(table, value, false, false, 0, 0);
        int width = component.getPreferredSize().width + 10;
        TableColumn column = table.getColumnModel().getColumn(col);
        if(width > column.getPreferredWidth()) {
        // Calculate default column width
        int default_width = 0;
        int total_width = scroll_pane.getSize().width;
        if(names.length == 2) {
            if(col == 0) {
            default_width = total_width / 3;
            }
            else {
            default_width = 2 * (total_width / 3);
            }
        }
        else {
            switch(col) {
            case 0:
            default_width = (2 * total_width) / 9;
            break;
            case 1:
            default_width = total_width / 9;
            break;
            default:
            default_width = 2 * (total_width / 3);
            break;
            }
        }
        if(width > default_width) {
            column.setPreferredWidth(width);
        }
        else {
            column.setPreferredWidth(default_width);
        }
        }
        longest[col] = value.length();
    }
    return Utility.stripNL(value);
    }
    public void removeRow(final int row) {
    ///ystem.err.println("Remove row " + row);
    Attribute attribute = getAttribute(row);
    if(attribute != null) {
        attributes.remove(attribute);
                // Arg... this caused me a headache for hours.
        last_index = -1;
        fireTableRowsDeleted(row, row);
    }
    }
    public void setScrollPane(JScrollPane scroll_pane) {
    this.scroll_pane = scroll_pane;
    }
    public void setTable(JTable table) {
    this.table = table;
    this.longest = new int[getColumnCount()];
    }
}