| Package | org.aswing.tree |
| Interface | public interface TreeModel |
| Implementors | DefaultTreeModel |
JTree.
For further information on tree models,
including an example of a custom implementation,
see How to Use Trees
in The Java Tutorial.
JTree and its related classes make extensive use of
TreePaths for indentifying nodes in the TreeModel.
If a TreeModel returns the same object, as compared by
equals, at two different indices under the same parent
than the resulting TreePath objects will be considered equal
as well. Some implementations may assume that if two
TreePaths are equal, they identify the same node. If this
condition is not met, painting problems and other oddities may result.
In other words, if getChild for a given parent returns
the same Object (as determined by equals) problems may
result, and it is recommended you avoid doing this.
(Fully quoted from java swing's tree doc)
See also
| Method | Defined by | ||
|---|---|---|---|
|
Adds a listener for the
TreeModelEvent
posted after the tree changes. | TreeModel | ||
|
getChild(parent:Object, index:int):Object
Returns the child of
parent at index index
in the parent's
child array. | TreeModel | ||
|
getChildCount(parent:Object):int
Returns the number of children of
parent. | TreeModel | ||
|
getIndexOfChild(parent:Object, child:Object):int
Returns the index of child in parent.
| TreeModel | ||
|
getRoot():Object
Returns the root of the tree.
| TreeModel | ||
|
isLeaf(node:Object):Boolean
Returns
true if node is a leaf. | TreeModel | ||
|
Removes a listener previously added with
addTreeModelListener. | TreeModel | ||
|
valueForPathChanged(path:TreePath, newValue:Object):void
Messaged when the user has altered the value for the item identified
by
path to newValue. | TreeModel | ||
| addTreeModelListener | () | method |
public function addTreeModelListener(l:TreeModelListener):void
Adds a listener for the TreeModelEvent
posted after the tree changes.
l:TreeModelListener — l the listener to add
|
See also
| getChild | () | method |
public function getChild(parent:Object, index:int):Object
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)).
parent:Object — parent a node in the tree, obtained from this data source
|
|
index:int |
Object — the child of parent at index index
|
| getChildCount | () | method |
public function getChildCount(parent:Object):int
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.
parent:Object — parent a node in the tree, obtained from this data source
|
int — the number of children of the node parent
|
| getIndexOfChild | () | method |
public function getIndexOfChild(parent:Object, child:Object):int
Returns the index of child in parent. If either parent
or child is null, returns -1.
If either parent or child don't
belong to this tree model, returns -1.
parent:Object — a note in the tree, obtained from this data source
|
|
child:Object — the node we are interested in
|
int — the index of the child in the parent, or -1 if either
child or parent are null
or don't belong to this tree model
|
| getRoot | () | method |
public function getRoot():Object
Returns the root of the tree. Returns null
only if the tree has no nodes.
Object — the root of the tree
|
| isLeaf | () | method |
public function isLeaf(node:Object):Boolean
Returns true if node is a leaf.
It is possible for this method to return false
even if node has no children.
A directory in a filesystem, for example,
may contain no files; the node representing
the directory is not a leaf, but it also has no children.
node:Object — node a node in the tree, obtained from this data source
|
Boolean — true if node is a leaf
|
| removeTreeModelListener | () | method |
public function removeTreeModelListener(l:TreeModelListener):void
Removes a listener previously added with
addTreeModelListener.
l:TreeModelListener — l the listener to remove
|
See also
| valueForPathChanged | () | method |
public function valueForPathChanged(path:TreePath, newValue:Object):void
Messaged 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.
path:TreePath — path to the node that the user has altered
|
|
newValue:Object — the new value from the TreeCellEditor
|