IT. Expert System.

Java Standard Edition (SE)

TableModelEvent


javax.swing.event

Class 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 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.

    See Also:
    TableModel
    • 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
      • firstRow

        protected int firstRow
      • lastRow

        protected int lastRow
      • 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 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.
      • 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.
      • TableModelEvent

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

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

        public int getLastRow()
        Returns the last row that 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.
      • getType

        public int getType()
        Returns the type of event - one of: INSERT, UPDATE and DELETE.


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