Class TableModelEvent
- java.lang.Object
-
- java.util.EventObject
-
- javax.swing.event.TableModelEvent
- All Implemented Interfaces:
Serializable
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, 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 deletedIt 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
.
- See Also:
-
TableModel
, Serialized Form
Field Summary
Modifier and Type | Field | Description |
---|---|---|
static int | ALL_COLUMNS | Specifies all columns in a row or rows. |
protected int | column | The column for the event. |
static int | DELETE | Identifies the removal of rows or columns. |
protected int | firstRow | The first row that has changed. |
static int | HEADER_ROW | Identifies the header row. |
static int | INSERT | Identifies the addition of new rows or columns. |
protected int | lastRow | The last row that has changed. |
protected int | type | The type of the event. |
static int | UPDATE | Identifies a change to existing data. |
Fields declared in class java.util.EventObject
source
Constructor Summary
Constructor | Description |
---|---|
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 |
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
Modifier and Type | Method | Description |
---|---|---|
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 declared in class java.util.EventObject
getSource, toString
Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Field Detail
INSERT
public static final int INSERT
Identifies the addition of new rows or columns.
- See Also:
- Constant Field Values
UPDATE
public static final int UPDATE
Identifies a change to existing data.
- See Also:
- Constant Field Values
DELETE
public static final int DELETE
Identifies the removal of rows or columns.
- See Also:
- Constant Field Values
HEADER_ROW
public static final int HEADER_ROW
Identifies the header row.
- See Also:
- Constant Field Values
ALL_COLUMNS
public static final int ALL_COLUMNS
Specifies all columns in a row or rows.
- See Also:
- Constant Field Values
type
protected int type
The type of the event.
firstRow
protected int firstRow
The first row that has changed.
lastRow
protected int lastRow
The last row that has changed.
column
protected int column
The column for the event.
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 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.
- Parameters:
-
source
- theTableModel
affected by this event
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
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
.
- Parameters:
-
source
- theTableModel
affected by this event -
row
- the row which has been updated
TableModelEvent
public TableModelEvent(TableModel source, int firstRow, int lastRow)
The data in rows [firstRow, lastRow] have been updated.
- Parameters:
-
source
- theTableModel
affected by this event -
firstRow
- the first row affected by this event -
lastRow
- the last row affected by this event
TableModelEvent
public TableModelEvent(TableModel source, int firstRow, int lastRow, int column)
The cells in column column in the range [firstRow, lastRow] have been updated.
- Parameters:
-
source
- theTableModel
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.
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.
- Parameters:
-
source
- theTableModel
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
orUPDATE
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.
- Returns:
- an integer signifying the first row changed
getLastRow
public int getLastRow()
Returns the last row that changed.
- Returns:
- an integer signifying the last row changed
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.
- Returns:
- an integer signifying which column is affected by this event
getType
public int getType()
Returns the type of event - one of: INSERT, UPDATE and DELETE.
- Returns:
- the type of change to a table model, an
INSERT
orDELETE
of row(s) or column(s) orUPDATE
to data