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TableModelEvent.java
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1998-02-26
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/*
* @(#)TableModelEvent.java 1.10 98/02/02
*
* Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
package com.sun.java.swing.event;
import java.util.EventObject;
import com.sun.java.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: <p>
*
* <pre>
* TableModelEvent(source); // The data, ie. all rows changed
* TableModelEvent(source, HEADER_ROW); // Structure change, reallcoate 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>
* 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 Swing1.0 applications. It will
* not be possible to load serialized Swing1.0 objects with future releases
* of Swing. The JDK1.2 release of Swing will be the compatibility
* baseline for the serialized form of Swing objects.
*
* @version 1.10 02/02/98
* @author Alan Chung
* @author Philip Milne
* @see TableModel
*/
public class TableModelEvent extends java.util.EventObject
{
public static final int INSERT = 1;
public static final int UPDATE = 0;
public static final int DELETE = -1;
public static final int HEADER_ROW = -1;
public static final int ALL_COLUMNS = -1;
//
// Instance Variables
//
protected int type;
protected int firstRow;
protected int lastRow;
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 recieving
* this event, querying the model for the cell values that are visble.
* The structure of the table ie, the column names, types and order
* have not changed.
*/
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 <code>HEADER_ROW</code> as the value for the <I>row</I>.
* When the JTable recieves this event and its <I>autoCreateColumnsFromModel</I>
* 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 JTable.
*/
public TableModelEvent(TableModel source, int row) {
this(source, row, row, ALL_COLUMNS, UPDATE);
}
/**
* The data in rows [<I>firstRow</I>, <I>lastRow</I>] have been updated.
*/
public TableModelEvent(TableModel source, int firstRow, int lastRow) {
this(source, firstRow, lastRow, ALL_COLUMNS, UPDATE);
}
/**
* The cells in column <I>column</I> in the range
* [<I>firstRow</I>, <I>lastRow</I>] have been updated.
*/
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 <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.
*/
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.
*/
public int getFirstRow() { return firstRow; };
/** Returns the last row that 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.
*/
public int getColumn() { return column; };
/**
* Returns the type of event - one of: INSERT, UPDATE and DELETE.
*/
public int getType() { return type; }
}