javax.swing.table.DefaultTableColumnModel

All Implemented Interfaces:: PropertyChangeListener, Serializable, EventListener, ListSelectionListener, TableColumnModel

public class DefaultTableColumnModel
extends Object
implements TableColumnModel, PropertyChangeListener, ListSelectionListener, Serializable

The standard column-handler for a JTable.

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:: JTable

Field Summary

Fields
Modifier and Type	Field	Description
`protected ChangeEvent`	`changeEvent`	Change event (only one needed)
`protected int`	`columnMargin`	Width margin between each column
`protected boolean`	`columnSelectionAllowed`	Column selection allowed in this column model
`protected EventListenerList`	`listenerList`	List of TableColumnModelListener
`protected ListSelectionModel`	`selectionModel`	Model for keeping track of column selections
`protected Vector<TableColumn>`	`tableColumns`	Array of TableColumn objects in this model
`protected int`	`totalColumnWidth`	A local cache of the combined width of all columns

Constructor Summary

Constructors

Constructor Description

DefaultTableColumnModel()
Creates a default table column model.

Method Summary

Modifier and Type	Method	Description
`void`	`addColumn(TableColumn aColumn)`	Appends `aColumn` to the end of the `tableColumns` array.
`void`	`addColumnModelListener(TableColumnModelListener x)`	Adds a listener for table column model events.
`protected ListSelectionModel`	`createSelectionModel()`	Creates a new default list selection model.
`protected void`	`fireColumnAdded(TableColumnModelEvent e)`	Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireColumnMarginChanged()`	Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireColumnMoved(TableColumnModelEvent e)`	Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireColumnRemoved(TableColumnModelEvent e)`	Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireColumnSelectionChanged(ListSelectionEvent e)`	Notifies all listeners that have registered interest for notification on this event type.
`TableColumn`	`getColumn(int columnIndex)`	Returns the `TableColumn` object for the column at `columnIndex`.
`int`	`getColumnCount()`	Returns the number of columns in the `tableColumns` array.
`int`	`getColumnIndex(Object identifier)`	Returns the index of the first column in the `tableColumns` array whose identifier is equal to `identifier`, when compared using `equals`.
`int`	`getColumnIndexAtX(int x)`	Returns the index of the column that lies at position `x`, or -1 if no column covers this point.
`int`	`getColumnMargin()`	Returns the width margin for `TableColumn`.
`TableColumnModelListener[]`	`getColumnModelListeners()`	Returns an array of all the column model listeners registered on this model.
`Enumeration<TableColumn>`	`getColumns()`	Returns an `Enumeration` of all the columns in the model.
`boolean`	`getColumnSelectionAllowed()`	Returns true if column selection is allowed, otherwise false.
`<T extends EventListener> T[]`	`getListeners(Class<T> listenerType)`	Returns an array of all the objects currently registered as `FooListener`s upon this model.
`int`	`getSelectedColumnCount()`	Returns the number of columns selected.
`int[]`	`getSelectedColumns()`	Returns an array of selected columns.
`ListSelectionModel`	`getSelectionModel()`	Returns the `ListSelectionModel` that is used to maintain column selection state.
`int`	`getTotalColumnWidth()`	Returns the total combined width of all columns.
`void`	`moveColumn(int columnIndex, int newIndex)`	Moves the column and heading at `columnIndex` to `newIndex`.
`void`	`propertyChange(PropertyChangeEvent evt)`	Property Change Listener change method.
`protected void`	`recalcWidthCache()`	Recalculates the total combined width of all columns.
`void`	`removeColumn(TableColumn column)`	Deletes the `column` from the `tableColumns` array.
`void`	`removeColumnModelListener(TableColumnModelListener x)`	Removes a listener for table column model events.
`void`	`setColumnMargin(int newMargin)`	Sets the column margin to `newMargin`.
`void`	`setColumnSelectionAllowed(boolean flag)`	Sets whether column selection is allowed.
`void`	`setSelectionModel(ListSelectionModel newModel)`	Sets the selection model for this `TableColumnModel` to `newModel` and registers for listener notifications from the new selection model.
`void`	`valueChanged(ListSelectionEvent e)`	A `ListSelectionListener` that forwards `ListSelectionEvents` when there is a column selection change.

Methods declared in class java.lang.Object

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

Field Details
- tableColumns
  
  protected Vector<TableColumn> tableColumns
  
  Array of TableColumn objects in this model
- selectionModel
  
  protected ListSelectionModel selectionModel
  
  Model for keeping track of column selections
- columnMargin
  
  protected int columnMargin
  
  Width margin between each column
- listenerList
  
  protected EventListenerList listenerList
  
  List of TableColumnModelListener
- changeEvent
  
  protected transient ChangeEvent changeEvent
  
  Change event (only one needed)
- columnSelectionAllowed
  
  protected boolean columnSelectionAllowed
  
  Column selection allowed in this column model
- totalColumnWidth
  
  protected int totalColumnWidth
  
  A local cache of the combined width of all columns
Constructor Details
- DefaultTableColumnModel
  
  public DefaultTableColumnModel()
  
  Creates a default table column model.
Method Details
- addColumn
  
  public void addColumn(TableColumn aColumn)
  
  Appends aColumn to the end of the tableColumns array. This method also posts the columnAdded event to its listeners.
  
  Specified by:
  
  addColumn in interface TableColumnModel
  
  Parameters:
  
  aColumn - the TableColumn to be added
  
  Throws:
  
  IllegalArgumentException - if aColumn is null
  
  See Also:
  
  removeColumn(javax.swing.table.TableColumn)
- removeColumn
  
  public void removeColumn(TableColumn column)
  
  Deletes the column from the tableColumns array. This method will do nothing if column is not in the table's columns list. tile is called to resize both the header and table views. This method also posts a columnRemoved event to its listeners.
  
  Specified by:
  
  removeColumn in interface TableColumnModel
  
  Parameters:
  
  column - the TableColumn to be removed
  
  See Also:
  
  addColumn(javax.swing.table.TableColumn)
- moveColumn
  
  public void moveColumn(int columnIndex, int newIndex)
  
  Moves the column and heading at columnIndex to newIndex. The old column at columnIndex will now be found at newIndex. The column that used to be at newIndex is shifted left or right to make room. This will not move any columns if columnIndex equals newIndex. This method also posts a columnMoved event to its listeners.
  
  Specified by:
  
  moveColumn in interface TableColumnModel
  
  Parameters:
  
  columnIndex - the index of column to be moved
  
  newIndex - new index to move the column
  
  Throws:
  
  IllegalArgumentException - if column or newIndex are not in the valid range
- setColumnMargin
  
  public void setColumnMargin(int newMargin)
  
  Sets the column margin to newMargin. This method also posts a columnMarginChanged event to its listeners.
  
  Specified by:
  
  setColumnMargin in interface TableColumnModel
  
  Parameters:
  
  newMargin - the new margin width, in pixels
  
  See Also:
  
  getColumnMargin(), getTotalColumnWidth()
- getColumnCount
  
  public int getColumnCount()
  
  Returns the number of columns in the tableColumns array.
  
  Specified by:
  
  getColumnCount in interface TableColumnModel
  
  Returns:
  
  the number of columns in the tableColumns array
  
  See Also:
  
  getColumns()
- getColumns
  
  public Enumeration<TableColumn> getColumns()
  
  Returns an Enumeration of all the columns in the model.
  
  Specified by:
  
  getColumns in interface TableColumnModel
  
  Returns:
  
  an Enumeration of the columns in the model
- getColumnIndex
  
  public int getColumnIndex(Object identifier)
  
  Returns the index of the first column in the tableColumns array whose identifier is equal to identifier, when compared using equals.
  
  Specified by:
  
  getColumnIndex in interface TableColumnModel
  
  Parameters:
  
  identifier - the identifier object
  
  Returns:
  
  the index of the first column in the tableColumns array whose identifier is equal to identifier
  
  Throws:
  
  IllegalArgumentException - if identifier is null, or if no TableColumn has this identifier
  
  See Also:
  
  getColumn(int)
- getColumn
  
  public TableColumn getColumn(int columnIndex)
  
  Returns the TableColumn object for the column at columnIndex.
  
  Specified by:
  
  getColumn in interface TableColumnModel
  
  Parameters:
  
  columnIndex - the index of the column desired
  
  Returns:
  
  the TableColumn object for the column at columnIndex
- getColumnMargin
  
  public int getColumnMargin()
  
  Returns the width margin for TableColumn. The default columnMargin is 1.
  
  Specified by:
  
  getColumnMargin in interface TableColumnModel
  
  Returns:
  
  the maximum width for the TableColumn
  
  See Also:
  
  setColumnMargin(int)
- getColumnIndexAtX
  
  public int getColumnIndexAtX(int x)
  
  Returns the index of the column that lies at position x, or -1 if no column covers this point. In keeping with Swing's separable model architecture, a TableColumnModel does not know how the table columns actually appear on screen. The visual presentation of the columns is the responsibility of the view/controller object using this model (typically JTable). The view/controller need not display the columns sequentially from left to right. For example, columns could be displayed from right to left to accommodate a locale preference or some columns might be hidden at the request of the user. Because the model does not know how the columns are laid out on screen, the given xPosition should not be considered to be a coordinate in 2D graphics space. Instead, it should be considered to be a width from the start of the first column in the model. If the column index for a given X coordinate in 2D space is required, JTable.columnAtPoint can be used instead.
  
  Specified by:
  
  getColumnIndexAtX in interface TableColumnModel
  
  Parameters:
  
  x - the horizontal location of interest
  
  Returns:
  
  the index of the column or -1 if no column is found
  
  See Also:
  
  JTable.columnAtPoint(java.awt.Point)
- getTotalColumnWidth
  
  public int getTotalColumnWidth()
  
  Returns the total combined width of all columns.
  
  Specified by:
  
  getTotalColumnWidth in interface TableColumnModel
  
  Returns:
  
  the totalColumnWidth property
- setSelectionModel
  
  public void setSelectionModel(ListSelectionModel newModel)
  
  Sets the selection model for this TableColumnModel to newModel and registers for listener notifications from the new selection model. If newModel is null, an exception is thrown.
  
  Specified by:
  
  setSelectionModel in interface TableColumnModel
  
  Parameters:
  
  newModel - the new selection model
  
  Throws:
  
  IllegalArgumentException - if newModel is null
  
  See Also:
  
  getSelectionModel()
- getSelectionModel
  
  public ListSelectionModel getSelectionModel()
  
  Returns the ListSelectionModel that is used to maintain column selection state.
  
  Specified by:
  
  getSelectionModel in interface TableColumnModel
  
  Returns:
  
  the object that provides column selection state. Or null if row selection is not allowed.
  
  See Also:
  
  setSelectionModel(javax.swing.ListSelectionModel)
- setColumnSelectionAllowed
  
  public void setColumnSelectionAllowed(boolean flag)
  
  Sets whether column selection is allowed. The default is false.
  
  Specified by:
  
  setColumnSelectionAllowed in interface TableColumnModel
  
  Parameters:
  
  flag - true if column selection will be allowed, false otherwise
  
  See Also:
  
  TableColumnModel.getColumnSelectionAllowed()
- getColumnSelectionAllowed
  
  public boolean getColumnSelectionAllowed()
  
  Returns true if column selection is allowed, otherwise false. The default is false.
  
  Specified by:
  
  getColumnSelectionAllowed in interface TableColumnModel
  
  Returns:
  
  the columnSelectionAllowed property
  
  See Also:
  
  TableColumnModel.setColumnSelectionAllowed(boolean)
- getSelectedColumns
  
  public int[] getSelectedColumns()
  
  Returns an array of selected columns. If selectionModel is null, returns an empty array.
  
  Specified by:
  
  getSelectedColumns in interface TableColumnModel
  
  Returns:
  
  an array of selected columns or an empty array if nothing is selected or the selectionModel is null
- getSelectedColumnCount
  
  public int getSelectedColumnCount()
  
  Returns the number of columns selected.
  
  Specified by:
  
  getSelectedColumnCount in interface TableColumnModel
  
  Returns:
  
  the number of columns selected
- addColumnModelListener
  
  public void addColumnModelListener(TableColumnModelListener x)
  
  Adds a listener for table column model events.
  
  Specified by:
  
  addColumnModelListener in interface TableColumnModel
  
  Parameters:
  
  x - a TableColumnModelListener object
- removeColumnModelListener
  
  public void removeColumnModelListener(TableColumnModelListener x)
  
  Removes a listener for table column model events.
  
  Specified by:
  
  removeColumnModelListener in interface TableColumnModel
  
  Parameters:
  
  x - a TableColumnModelListener object
- getColumnModelListeners
  
  public TableColumnModelListener[] getColumnModelListeners()
  
  Returns an array of all the column model listeners registered on this model.
  
  Returns:
  
  all of this default table column model's ColumnModelListeners or an empty array if no column model listeners are currently registered
  
  Since:
  
  1.4
  
  See Also:
  
  addColumnModelListener(javax.swing.event.TableColumnModelListener), removeColumnModelListener(javax.swing.event.TableColumnModelListener)
- fireColumnAdded
  
  protected void fireColumnAdded(TableColumnModelEvent e)
  
  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
  
  Parameters:
  
  e - the event received
  
  See Also:
  
  EventListenerList
- fireColumnRemoved
  
  protected void fireColumnRemoved(TableColumnModelEvent e)
  
  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
  
  Parameters:
  
  e - the event received
  
  See Also:
  
  EventListenerList
- fireColumnMoved
  
  protected void fireColumnMoved(TableColumnModelEvent e)
  
  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
  
  Parameters:
  
  e - the event received
  
  See Also:
  
  EventListenerList
- fireColumnSelectionChanged
  
  protected void fireColumnSelectionChanged(ListSelectionEvent e)
  
  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
  
  Parameters:
  
  e - the event received
  
  See Also:
  
  EventListenerList
- fireColumnMarginChanged
  
  protected void fireColumnMarginChanged()
  
  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.
  
  See Also:
  
  EventListenerList
- getListeners
  
  public <T extends EventListener> T[] getListeners(Class<T> listenerType)
  Returns an array of all the objects currently registered as FooListeners upon this model. FooListeners are registered using the addFooListener method.
  You can specify the listenerType argument with a class literal, such as FooListener.class. For example, you can query a DefaultTableColumnModel m for its column model listeners with the following code:
  ColumnModelListener[] cmls = (ColumnModelListener[])(m.getListeners(ColumnModelListener.class));
  If no such listeners exist, this method returns an empty array.
  Type Parameters:
  
  T - the listener type
  
  Parameters:
  
  listenerType - the type of listeners requested
  
  Returns:
  
  an array of all objects registered as FooListeners on this model, or an empty array if no such listeners have been added
  
  Throws:
  
  ClassCastException - if listenerType doesn't specify a class or interface that implements java.util.EventListener
  
  Since:
  
  1.3
  
  See Also:
  
  getColumnModelListeners()
- propertyChange
  
  public void propertyChange(PropertyChangeEvent evt)
  
  Property Change Listener change method. Used to track changes to the column width or preferred column width.
  
  Specified by:
  
  propertyChange in interface PropertyChangeListener
  
  Parameters:
  
  evt - PropertyChangeEvent
- valueChanged
  
  public void valueChanged(ListSelectionEvent e)
  
  A ListSelectionListener that forwards ListSelectionEvents when there is a column selection change.
  
  Specified by:
  
  valueChanged in interface ListSelectionListener
  
  Parameters:
  
  e - the change event
- createSelectionModel
  
  protected ListSelectionModel createSelectionModel()
  
  Creates a new default list selection model.
  
  Returns:
  
  a newly created default list selection model.
- recalcWidthCache
  
  protected void recalcWidthCache()
  
  Recalculates the total combined width of all columns. Updates the totalColumnWidth property.

Class DefaultTableColumnModel

Field Summary

Constructor Summary

Method Summary

Methods declared in class java.lang.Object

Field Details

Constructor Details

Method Details