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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class TableModelEvent - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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javax.swing.event
Class TableModelEvent

java.lang.Object
  |
  +--java.util.EventObject
        |
        +--javax.swing.event.TableModelEvent

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public class TableModelEvent

extends EventObject

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, 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
 

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. A future release of Swing will provide support for long term persistence.

See Also:

TableModel, Serialized Form

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Field Summary
static int	ALL_COLUMNS           Specifies all columns in a row or rows.
protected  int	column
static int	DELETE           Identifies the removal of rows or columns.
protected  int	firstRow
static int	HEADER_ROW           Identifies the header row.
static int	INSERT           Identifies the addtion of new rows or columns.
protected  int	lastRow
protected  int	type
static int	UPDATE           Identifies a change to existing data.

 

Fields inherited from class java.util.EventObject

source

 

Constructor Summary

TableModelEvent(TableModel source)           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.

TableModelEvent(TableModel source, int row)           This row of data has been updated.

TableModelEvent(TableModel source, int firstRow, int lastRow)           The data in rows [firstRow, lastRow] have been updated.

TableModelEvent(TableModel source, int firstRow, int lastRow, int column)           The cells in column column in the range [firstRow, lastRow] have been updated.

TableModelEvent(TableModel source, int firstRow, int lastRow, int column, int type)           The cells from (firstRow, column) to (lastRow, column) have been changed.

 

Method Summary
int	getColumn()           Returns the column for the event.
int	getFirstRow()           Returns the first row that changed.
int	getLastRow()           Returns the last row that changed.
int	getType()           Returns the type of event - one of: INSERT, UPDATE and DELETE.

 

Methods inherited from class java.util.EventObject

getSource, toString

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Field Detail

INSERT

public static final int INSERT

Identifies the addtion of new rows or columns.

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UPDATE

public static final int UPDATE

Identifies a change to existing data.

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DELETE

public static final int DELETE

Identifies the removal of rows or columns.

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HEADER_ROW

public static final int HEADER_ROW

Identifies the header row.

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ALL_COLUMNS

public static final int ALL_COLUMNS

Specifies all columns in a row or rows.

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type

protected int type

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firstRow

protected int firstRow

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lastRow

protected int lastRow

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column

protected int column

Constructor Detail

TableModelEvent

public TableModelEvent(TableModel source)

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.

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TableModelEvent

public TableModelEvent(TableModel source,
                       int row)

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 recieves 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.

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TableModelEvent

public TableModelEvent(TableModel source,
                       int firstRow,
                       int lastRow)

The data in rows [firstRow, lastRow] have been updated.

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TableModelEvent

public TableModelEvent(TableModel source,
                       int firstRow,
                       int lastRow,
                       int column)

The cells in column column in the range [firstRow, lastRow] have been updated.

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TableModelEvent

public TableModelEvent(TableModel source,
                       int firstRow,
                       int lastRow,
                       int column,
                       int type)

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.

Method Detail

getFirstRow

public int getFirstRow()

Returns the first row that changed. HEADER_ROW means the meta data, ie. names, types and order of the columns.

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getLastRow

public int getLastRow()

Returns the last row that changed.

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getColumn

public int getColumn()

Returns the column for the event. If the return value is ALL_COLUMNS; it means every column in the specified rows changed.

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getType

public int getType()

Returns the type of event - one of: INSERT, UPDATE and DELETE.

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