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package javax.swing.event;

import java.util.EventObject;
import javax.swing.table.*;

TableModelEvent is used to notify listeners that a table model
has changed. The model event describes changes to a TableModel
and all references to rows and columns are in the co-ordinate
system of the model.
Depending on the parameters used in the constructors, the TableModelevent
can be used to specify the following types of changes:
TableModelEvent(source);              //  The data, ie. all rows changed
TableModelEvent(source, HEADER_ROW);  //  Structure change, reallocate TableColumns
TableModelEvent(source, 1);           //  Row 1 changed
TableModelEvent(source, 3, 6);        //  Rows 3 to 6 inclusive changed
TableModelEvent(source, 2, 2, 6);     //  Cell at (2, 6) changed
TableModelEvent(source, 3, 6, ALL_COLUMNS, INSERT); // Rows (3, 6) were inserted
TableModelEvent(source, 3, 6, ALL_COLUMNS, DELETE); // Rows (3, 6) were deleted

It is possible to use other combinations of the parameters, not all of them
are meaningful. By subclassing, you can add other information, for example:
whether the event WILL happen or DID happen. This makes the specification
of rows in DELETE events more useful but has not been included in
the swing package as the JTable only needs post-event notification.

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeans
has been added to the java.beans package. Please see XMLEncoder. 
Author:
Alan Chung, Philip Milne
See Also:
TableModel/**
 * TableModelEvent is used to notify listeners that a table model
 * has changed. The model event describes changes to a TableModel
 * and all references to rows and columns are in the co-ordinate
 * system of the model.
 * Depending on the parameters used in the constructors, the TableModelevent
 * can be used to specify the following types of changes:
 *
 * <pre>
 * TableModelEvent(source);              //  The data, ie. all rows changed
 * TableModelEvent(source, HEADER_ROW);  //  Structure change, reallocate TableColumns
 * TableModelEvent(source, 1);           //  Row 1 changed
 * TableModelEvent(source, 3, 6);        //  Rows 3 to 6 inclusive changed
 * TableModelEvent(source, 2, 2, 6);     //  Cell at (2, 6) changed
 * TableModelEvent(source, 3, 6, ALL_COLUMNS, INSERT); // Rows (3, 6) were inserted
 * TableModelEvent(source, 3, 6, ALL_COLUMNS, DELETE); // Rows (3, 6) were deleted
 * </pre>
 *
 * It is possible to use other combinations of the parameters, not all of them
 * are meaningful. By subclassing, you can add other information, for example:
 * whether the event WILL happen or DID happen. This makes the specification
 * of rows in DELETE events more useful but has not been included in
 * the swing package as the JTable only needs post-event notification.
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Alan Chung
 * @author Philip Milne
 * @see TableModel
 */
@SuppressWarnings("serial") // Same-version serialization only
public class TableModelEvent extends java.util.EventObject
{
    
Identifies the addition of new rows or columns. /** Identifies the addition of new rows or columns. */
    public static final int INSERT =  1;
    
Identifies a change to existing data. /** Identifies a change to existing data. */
    public static final int UPDATE =  0;
    
Identifies the removal of rows or columns. /** Identifies the removal of rows or columns. */
    public static final int DELETE = -1;

    
Identifies the header row. /** Identifies the header row. */
    public static final int HEADER_ROW = -1;

    
Specifies all columns in a row or rows. /** Specifies all columns in a row or rows. */
    public static final int ALL_COLUMNS = -1;

//
//  Instance Variables
//

    
The type of the event.
/**
     * The type of the event.
     */
    protected int       type;
    
The first row that has changed.
/**
     * The first row that has changed.
     */
    protected int       firstRow;
    
The last row that has changed.
/**
     * The last row that has changed.
     */
    protected int       lastRow;
    
The column for the event.
/**
     * The column for the event.
     */
    protected int       column;

//
// Constructors
//

    
All row data in the table has changed, listeners should discard any state
that was based on the rows and requery the TableModel
to get the new row count and all the appropriate values.
The JTable will repaint the entire visible region on
receiving this event, querying the model for the cell values that are visible.
The structure of the table ie, the column names, types and order
have not changed.
Params:
source – the TableModel affected by this event/**
     * All row data in the table has changed, listeners should discard any state
     * that was based on the rows and requery the <code>TableModel</code>
     * to get the new row count and all the appropriate values.
     * The <code>JTable</code> will repaint the entire visible region on
     * receiving this event, querying the model for the cell values that are visible.
     * The structure of the table ie, the column names, types and order
     * have not changed.
     *
     * @param source the {@code TableModel} affected by this event
     */
    public TableModelEvent(TableModel source) {
        // Use Integer.MAX_VALUE instead of getRowCount() in case rows were deleted.
        this(source, 0, Integer.MAX_VALUE, ALL_COLUMNS, UPDATE);
    }

    
This row of data has been updated.
To denote the arrival of a completely new table with a different structure
use HEADER_ROW as the value for the row.
When the JTable receives this event and its
autoCreateColumnsFromModel
flag is set it discards any TableColumns that it had and reallocates
default ones in the order they appear in the model. This is the
same as calling setModel(TableModel) on the JTable.
Params:
source – the TableModel affected by this event
row – the row which has been updated/**
     * This row of data has been updated.
     * To denote the arrival of a completely new table with a different structure
     * use <code>HEADER_ROW</code> as the value for the <code>row</code>.
     * When the <code>JTable</code> receives this event and its
     * <code>autoCreateColumnsFromModel</code>
     * flag is set it discards any TableColumns that it had and reallocates
     * default ones in the order they appear in the model. This is the
     * same as calling <code>setModel(TableModel)</code> on the <code>JTable</code>.
     *
     * @param source the {@code TableModel} affected by this event
     * @param row the row which has been updated
     */
    public TableModelEvent(TableModel source, int row) {
        this(source, row, row, ALL_COLUMNS, UPDATE);
    }

    
The data in rows [firstRow, lastRow] have been updated.
Params:
source – the TableModel affected by this event
firstRow – the first row affected by this event
lastRow –  the last row affected by this event/**
     * The data in rows [<I>firstRow</I>, <I>lastRow</I>] have been updated.
     *
     * @param source the {@code TableModel} affected by this event
     * @param firstRow the first row affected by this event
     * @param lastRow  the last row affected by this event
     */
    public TableModelEvent(TableModel source, int firstRow, int lastRow) {
        this(source, firstRow, lastRow, ALL_COLUMNS, UPDATE);
    }

    
 The cells in column column in the range
 [firstRow, lastRow] have been updated.
Params:
source – the TableModel affected by this event
firstRow – the first row affected by this event
lastRow –  the last row affected by this event
column – the column index of cells changed; ALL_COLUMNS signifies all cells in the specified range of rows are changed./**
     *  The cells in column <I>column</I> in the range
     *  [<I>firstRow</I>, <I>lastRow</I>] have been updated.
     *
     * @param source the {@code TableModel} affected by this event
     * @param firstRow the first row affected by this event
     * @param lastRow  the last row affected by this event
     * @param column the column index of cells changed; {@code ALL_COLUMNS}
     *        signifies all cells in the specified range of rows are changed.
     */
    public TableModelEvent(TableModel source, int firstRow, int lastRow, int column) {
        this(source, firstRow, lastRow, column, UPDATE);
    }

    
The cells from (firstRow, column) to (lastRow, column) have been changed.
The column refers to the column index of the cell in the model's
co-ordinate system. When column is ALL_COLUMNS, all cells in the
specified range of rows are considered changed.

The type should be one of: INSERT, UPDATE and DELETE.
Params:
source – the TableModel affected by this event
firstRow – the first row affected by this event
lastRow –  the last row affected by this event
column – the column index of cells changed; ALL_COLUMNS signifies all cells in the specified range of rows are changed.
type – the type of change signified by this even, INSERT, DELETE  or UPDATE/**
     * The cells from (firstRow, column) to (lastRow, column) have been changed.
     * The <I>column</I> refers to the column index of the cell in the model's
     * co-ordinate system. When <I>column</I> is ALL_COLUMNS, all cells in the
     * specified range of rows are considered changed.
     * <p>
     * The <I>type</I> should be one of: INSERT, UPDATE and DELETE.
     *
     * @param source the {@code TableModel} affected by this event
     * @param firstRow the first row affected by this event
     * @param lastRow  the last row affected by this event
     * @param column the column index of cells changed; {@code ALL_COLUMNS}
     *        signifies all cells in the specified range of rows are changed.
     * @param type the type of change signified by this even, {@code INSERT},
     *        {@code DELETE } or {@code UPDATE}
     */
    public TableModelEvent(TableModel source, int firstRow, int lastRow, int column, int type) {
        super(source);
        this.firstRow = firstRow;
        this.lastRow = lastRow;
        this.column = column;
        this.type = type;
    }

//
// Querying Methods
//

    
Returns the first row that changed.  HEADER_ROW means the meta data,
ie. names, types and order of the columns.
Returns:
an integer signifying the first row changed/**
     * Returns the first row that changed.  HEADER_ROW means the meta data,
     * ie. names, types and order of the columns.
     *
     * @return an integer signifying the first row changed
     */
    public int getFirstRow() { return firstRow; };

    
Returns the last row that changed.
Returns:
an integer signifying the last row changed/**
     * Returns the last row that changed.
     *
     * @return an integer signifying the last row changed
     */
    public int getLastRow() { return lastRow; };

    
 Returns the column for the event.  If the return
 value is ALL_COLUMNS; it means every column in the specified
 rows changed.
Returns:
an integer signifying which column is affected by this event/**
     *  Returns the column for the event.  If the return
     *  value is ALL_COLUMNS; it means every column in the specified
     *  rows changed.
     *
     * @return an integer signifying which column is affected by this event
     */
    public int getColumn() { return column; };

    
 Returns the type of event - one of: INSERT, UPDATE and DELETE.
Returns:
the type of change to a table model, an INSERT or DELETE  of row(s) or column(s) or UPDATE to data/**
     *  Returns the type of event - one of: INSERT, UPDATE and DELETE.
     *
     * @return the type of change to a table model, an {@code INSERT} or
     *         {@code DELETE } of row(s) or column(s) or {@code UPDATE}
     *         to data
     */
    public int getType() { return type; }
}