public class ExplorerTreeModel
extends javax.swing.tree.DefaultTreeModel
Modifier and Type | Field and Description |
---|---|
static java.lang.String |
rootNode |
Modifier and Type | Method and Description |
---|---|
void |
addTreeModelListener(javax.swing.event.TreeModelListener l)
Adds a listener for the
TreeModelEvent
posted after the tree changes. |
java.lang.Object |
getChild(java.lang.Object parent,
int index)
Returns the child of
parent at index index
in the parent's
child array. |
int |
getChildCount(java.lang.Object parent)
Returns the number of children of
parent . |
int |
getIndexOfChild(java.lang.Object parent,
java.lang.Object child)
Returns the index of child in parent.
|
javax.swing.tree.TreeNode[] |
getPathToRoot(javax.swing.tree.TreeNode aNode)
Builds the parents of node up to and including the root node,
where the original node is the last element in the returned array.
|
protected javax.swing.tree.TreeNode[] |
getPathToRoot(javax.swing.tree.TreeNode aNode,
int depth)
Builds the parents of node up to and including the root node,
where the original node is the last element in the returned array.
|
java.lang.Object |
getRoot()
Returns the root of the tree.
|
boolean |
isLeaf(java.lang.Object node)
Returns
true if node is a leaf. |
static javax.swing.tree.DefaultMutableTreeNode |
makeLibraryTree() |
void |
nodesChanged(java.lang.Object[] path,
int[] childIndices)
Invoke this method after you've changed how the children identified by
childIndicies are to be represented in the tree.
|
void |
nodesWereInserted(java.lang.Object[] path,
int[] childIndices)
Invoke this method after you've inserted some TreeNodes into
node.
|
void |
nodesWereRemoved(java.lang.Object[] path,
int[] childIndices,
java.lang.Object[] removedChildren)
Invoke this method after you've removed some TreeNodes from
node.
|
void |
reload(java.lang.Object[] path)
Invoke this method if you've modified the TreeNodes upon which this
model depends.
|
void |
removeTreeModelListener(javax.swing.event.TreeModelListener l)
Removes a listener previously added with
addTreeModelListener . |
void |
valueForPathChanged(javax.swing.tree.TreePath path,
java.lang.Object newValue)
Messaged when the user has altered the value for the item identified
by
path to newValue . |
asksAllowsChildren, fireTreeNodesChanged, fireTreeNodesInserted, fireTreeNodesRemoved, fireTreeStructureChanged, getListeners, getTreeModelListeners, insertNodeInto, nodeChanged, nodesChanged, nodeStructureChanged, nodesWereInserted, nodesWereRemoved, reload, reload, removeNodeFromParent, setAsksAllowsChildren, setRoot
public static final java.lang.String rootNode
public java.lang.Object getRoot()
null
only if the tree has no nodes.getRoot
in interface javax.swing.tree.TreeModel
getRoot
in class javax.swing.tree.DefaultTreeModel
public java.lang.Object getChild(java.lang.Object parent, int index)
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 javax.swing.tree.TreeModel
getChild
in class javax.swing.tree.DefaultTreeModel
parent
- a node in the tree, obtained from this data sourceparent
at index index
public int getChildCount(java.lang.Object parent)
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 javax.swing.tree.TreeModel
getChildCount
in class javax.swing.tree.DefaultTreeModel
parent
- a node in the tree, obtained from this data sourceparent
public boolean isLeaf(java.lang.Object node)
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.isLeaf
in interface javax.swing.tree.TreeModel
isLeaf
in class javax.swing.tree.DefaultTreeModel
node
- a node in the tree, obtained from this data sourcenode
is a leafpublic void valueForPathChanged(javax.swing.tree.TreePath path, java.lang.Object newValue)
path
to newValue
.
If newValue
signifies a truly new value
the model should post a treeNodesChanged
event.valueForPathChanged
in interface javax.swing.tree.TreeModel
valueForPathChanged
in class javax.swing.tree.DefaultTreeModel
path
- path to the node that the user has alterednewValue
- the new value from the TreeCellEditorpublic int getIndexOfChild(java.lang.Object parent, java.lang.Object child)
parent
or child
is null
, returns -1.
If either parent
or child
don't
belong to this tree model, returns -1.getIndexOfChild
in interface javax.swing.tree.TreeModel
getIndexOfChild
in class javax.swing.tree.DefaultTreeModel
parent
- a note in the tree, obtained from this data sourcechild
- the node we are interested inchild
or parent
are null
or don't belong to this tree modelpublic void addTreeModelListener(javax.swing.event.TreeModelListener l)
TreeModelEvent
posted after the tree changes.addTreeModelListener
in interface javax.swing.tree.TreeModel
addTreeModelListener
in class javax.swing.tree.DefaultTreeModel
l
- the listener to addremoveTreeModelListener(javax.swing.event.TreeModelListener)
public void removeTreeModelListener(javax.swing.event.TreeModelListener l)
addTreeModelListener
.removeTreeModelListener
in interface javax.swing.tree.TreeModel
removeTreeModelListener
in class javax.swing.tree.DefaultTreeModel
l
- the listener to removeaddTreeModelListener(javax.swing.event.TreeModelListener)
public void reload(java.lang.Object[] path)
node
(PENDING).public void nodesWereInserted(java.lang.Object[] path, int[] childIndices)
public void nodesWereRemoved(java.lang.Object[] path, int[] childIndices, java.lang.Object[] removedChildren)
public void nodesChanged(java.lang.Object[] path, int[] childIndices)
public javax.swing.tree.TreeNode[] getPathToRoot(javax.swing.tree.TreeNode aNode)
getPathToRoot
in class javax.swing.tree.DefaultTreeModel
aNode
- the TreeNode to get the path forprotected javax.swing.tree.TreeNode[] getPathToRoot(javax.swing.tree.TreeNode aNode, int depth)
getPathToRoot
in class javax.swing.tree.DefaultTreeModel
aNode
- the TreeNode to get the path fordepth
- an int giving the number of steps already taken towards
the root (on recursive calls), used to size the returned arraypublic static javax.swing.tree.DefaultMutableTreeNode makeLibraryTree()