org.jdesktop.swingx.treetable

Class AbstractTreeTableModel

java.lang.Object

org.jdesktop.swingx.treetable.AbstractTreeTableModel

All Implemented Interfaces:

TreeModel, TreeTableModel

Direct Known Subclasses:

DefaultTreeTableModel, FileSystemModel

public abstract class AbstractTreeTableModel
extends Object
implements TreeTableModel

AbstractTreeTableModel provides an implementation of TreeTableModel as a convenient starting point in defining custom data models for JXTreeTable. It takes care of listener management and contains convenience methods for creating and dispatching TreeModelEvents. To create a concreate instance of TreeTableModel you need only to provide implementations for the following methods:

 public int getColumnCount();
 public Object getValueAt(Object node, int column);
 public Object getChild(Object parent, int index);
 public int getChildCount(Object parent);
 public int getIndexOfChild(Object parent, Object child);
 public boolean isLeaf(Object node);
 

Author:

Ramesh Gupta, Karl Schaefer

Field Summary

Fields

Modifier and Type	Field and Description
protected TreeModelSupport	modelSupport Provides support for event dispatching.
protected Object	root Root node of the model

Constructor Summary

Constructors

Constructor and Description
AbstractTreeTableModel() Constructs an AbstractTreeTableModel with a null root node.
AbstractTreeTableModel(Object root) Constructs an AbstractTreeTableModel with the specified root node.

Method Summary

Modifier and Type	Method and Description
void	addTreeModelListener(TreeModelListener l)
Class<?>	getColumnClass(int column) Returns the most specific superclass for all the cell values in the column.
String	getColumnName(int column) Returns the name of the column at columnIndex.
int	getHierarchicalColumn() Returns the column that is the "tree" column.
Object	getRoot()
TreeModelListener[]	getTreeModelListeners() Returns an array of all the TreeModelListeners added to this JXTreeTable with addTreeModelListener().
boolean	isCellEditable(Object node, int column) Returns true if the cell for the node at columnIndex is editable.
boolean	isLeaf(Object node) Returns true if node is a leaf.
void	removeTreeModelListener(TreeModelListener l)
void	setValueAt(Object value, Object node, int column) Sets the value for the node at columnIndex to value.
void	valueForPathChanged(TreePath path, Object newValue) Called when value for the item identified by path has been changed.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jdesktop.swingx.treetable.TreeTableModel

getColumnCount, getValueAt

Methods inherited from interface javax.swing.tree.TreeModel

getChild, getChildCount, getIndexOfChild

Field Detail

root

protected Object root

Root node of the model

modelSupport

protected TreeModelSupport modelSupport

Provides support for event dispatching.

Constructor Detail

AbstractTreeTableModel

public AbstractTreeTableModel()

Constructs an AbstractTreeTableModel with a null root node.

AbstractTreeTableModel

public AbstractTreeTableModel(Object root)

Constructs an AbstractTreeTableModel with the specified root node.

Parameters:

root - root node

Method Detail

getColumnClass

public Class<?> getColumnClass(int column)

Returns the most specific superclass for all the cell values in the column. This is used by the JXTreeTable to set up a default renderer and editor for the column.

Specified by:

getColumnClass in interface TreeTableModel

Parameters:

column - the index of the column

Returns:

the common ancestor class of the object values in the model.

See Also:

TableModel.getColumnClass(int)

getColumnName

public String getColumnName(int column)

Returns the name of the column at columnIndex. This is used to initialize the table's column header name. Note: this name does not need to be unique; two columns in a table can have the same name.

Specified by:

getColumnName in interface TreeTableModel

Parameters:

column - the index of the column

Returns:

the name of the column

See Also:

TableModel.getColumnName(int)

getHierarchicalColumn

public int getHierarchicalColumn()

Returns the column that is the "tree" column. While it is not required, most implementations will default the first column to be the hierarchical one.

Specified by:

getHierarchicalColumn in interface TreeTableModel

Returns:

the index of the hierarchical column or -1 if no column is the hierarchical column.

getRoot

public Object getRoot()

Specified by:

getRoot in interface TreeModel

isCellEditable

public boolean isCellEditable(Object node,
                              int column)

Returns true if the cell for the node at columnIndex is editable. Otherwise, setValueAt on the cell will not change the value of that cell. The node must be managed by this model. Unamanaged nodes should throw an IllegalArgumentException.

Specified by:

isCellEditable in interface TreeTableModel

Parameters:

node - the node whose value to be queried

column - the column whose value to be queried

Returns:

true if the cell is editable

See Also:

TreeTableModel.setValueAt(java.lang.Object, java.lang.Object, int), TableModel.isCellEditable(int, int)

isLeaf

public boolean isLeaf(Object node)

Returns true if node is a leaf.

Specified by:

isLeaf in interface TreeModel

Parameters:

node - a node in the tree, obtained from this data source

Returns:

true if node is a leaf

This implementation:

true if getChildCount(node) == 0

setValueAt

public void setValueAt(Object value,
                       Object node,
                       int column)

Sets the value for the node at columnIndex to value.

Specified by:

setValueAt in interface TreeTableModel

Parameters:

value - the new value

node - the node whose value is to be changed

column - the column whose value is to be changed

See Also:

TreeTableModel.getValueAt(java.lang.Object, int), isCellEditable(java.lang.Object, int), TableModel.setValueAt(Object, int, int)

This implementation:

is no-op; provided for convenience for uneditable models

valueForPathChanged

public void valueForPathChanged(TreePath path,
                                Object newValue)

Called when value for the item identified by path has been changed. If newValue signifies a truly new value the model should post a treeNodesChanged event.

Specified by:

valueForPathChanged in interface TreeModel

Parameters:

path - path to the node that has changed

newValue - the new value from the TreeCellEditor

This implementation:

is no-op. A JXTreeTable does not usually edit the node directly.

addTreeModelListener

public void addTreeModelListener(TreeModelListener l)

Specified by:

addTreeModelListener in interface TreeModel

removeTreeModelListener

public void removeTreeModelListener(TreeModelListener l)

Specified by:

removeTreeModelListener in interface TreeModel

getTreeModelListeners

public TreeModelListener[] getTreeModelListeners()

Returns an array of all the TreeModelListeners added to this JXTreeTable with addTreeModelListener().

Returns:

all of the TreeModelListeners added or an empty array if no listeners have been added