charvax.swing.tree
Class DefaultTreeModel
java.lang.Object
charvax.swing.tree.DefaultTreeModel
- TreeModel
public class DefaultTreeModel
extends java.lang.Object
(UNDER CONSTRUCTION) A simple tree data model that uses TreeNodes.
void | addTreeModelListener(TreeModelListener l) - Adds a listener for the TreeModelEvent posted after the tree changes.
|
Object | getChild(Object parent, int index) - Returns the child of parent at index index in the parent's child
array. parent must be a node previously obtained from this data
source.
|
int | getChildCount(Object parent) - Returns the number of children of parent.
|
Object | getRoot() - Returns the root of the tree.
|
boolean | isLeaf(Object node_) - Returns true if node is a leaf.
|
void | removeTreeModelListener(TreeModelListener l) - Removes a listener previously added with addTreeModelListener.
|
void | valueForPathChanged(TreePath path, Object newValue) - Called when the user has altered the value for the item
identified by path to newValue.
|
_asksAllowsChildren
protected boolean _asksAllowsChildren
Determines how the isLeaf method figures out if a node is a leaf
node. If true, a node is a leaf node if it does not allow children.
(If it allows children, it is not a leaf node, even if no children
are present.) That lets you distinguish between folder nodes and
file nodes in a file system, for example.
If this value is false, then any node which has no children is a
leaf node, and any node may acquire children.
_listeners
protected ArrayList _listeners
getChild
public Object getChild(Object parent,
int index)
Returns the child of parent at index index in the parent's child
array. parent must be a node previously obtained from this data
source. This should not return null if index is a valid index for
parent (that is index >= 0 && index < getChildCount(parent)).
- getChild in interface TreeModel
getChildCount
public int getChildCount(Object parent)
Returns the number of children of parent. Returns 0 if the node
is a leaf or if it has no children. parent must be a node previously
obtained from this data source.
- getChildCount in interface TreeModel
getRoot
public Object getRoot()
Returns the root of the tree.
Returns null only if the tree has no nodes.
- getRoot in interface TreeModel
isLeaf
public boolean isLeaf(Object node_)
Returns true if node is a leaf. The way the test is performed
depends on the asksAllowsChildren setting.
- isLeaf in interface TreeModel
valueForPathChanged
public void valueForPathChanged(TreePath path,
Object newValue)
Called when the user has altered the value for the item
identified by path to newValue. If newValue signifies a truly new
value the model should post a treeNodesChanged event.
- valueForPathChanged in interface TreeModel