Class JTree.TreeModelHandler

java.lang.Object

javax.swing.JTree.TreeModelHandler

All Implemented Interfaces:: EventListener, TreeModelListener

Enclosing class:: JTree

protected class JTree.TreeModelHandler extends Object implements TreeModelListener

Listens to the model and updates the expandedState accordingly when nodes are removed, or changed.

Since:: 1.2

Constructor Summary

TreeModelHandler()

Modifier	Constructor	Description
`protected`	Constructs a `TreeModelHandler`.

Method Summary

Modifier and Type	Method	Description
`void`	`treeNodesChanged(TreeModelEvent e)`	Invoked after a node (or a set of siblings) has changed in some way.
`void`	`treeNodesInserted(TreeModelEvent e)`	Invoked after nodes have been inserted into the tree.
`void`	`treeNodesRemoved(TreeModelEvent e)`	Invoked after nodes have been removed from the tree.
`void`	`treeStructureChanged(TreeModelEvent e)`	Invoked after the tree has drastically changed structure from a given node down.

Methods declared in class Object

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

Modifier and Type	Method	Description
`protected Object`	`clone()`	Creates and returns a copy of this object.
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `Object`.
`int`	`hashCode()`	Returns a hash code value for this object.
`final void`	`notify()`	Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()`	Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()`	Returns a string representation of the object.
`final void`	`wait()`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
`final void`	`wait(long timeoutMillis)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis, int nanos)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Constructor Details

TreeModelHandler

protected TreeModelHandler()

Constructs a TreeModelHandler.

Method Details

treeNodesChanged

public void treeNodesChanged(TreeModelEvent e)

Description copied from interface: TreeModelListener

Invoked after a node (or a set of siblings) has changed in some way. The node(s) have not changed locations in the tree or altered their children arrays, but other attributes have changed and may affect presentation. Example: the name of a file has changed, but it is in the same location in the file system.

To indicate the root has changed, childIndices and children will be null.

Use e.getPath() to get the parent of the changed node(s). e.getChildIndices() returns the index(es) of the changed node(s).

Specified by:: treeNodesChanged in interface TreeModelListener
Parameters:: e - a TreeModelEvent describing changes to a tree model

treeNodesInserted

public void treeNodesInserted(TreeModelEvent e)

Description copied from interface: TreeModelListener

Invoked after nodes have been inserted into the tree.

Use e.getPath() to get the parent of the new node(s). e.getChildIndices() returns the index(es) of the new node(s) in ascending order.

Specified by:: treeNodesInserted in interface TreeModelListener
Parameters:: e - a TreeModelEvent describing changes to a tree model

treeStructureChanged

public void treeStructureChanged(TreeModelEvent e)

Description copied from interface: TreeModelListener

Invoked after the tree has drastically changed structure from a given node down. If the path returned by e.getPath() is of length one and the first element does not identify the current root node the first element should become the new root of the tree.

Use e.getPath() to get the path to the node. e.getChildIndices() returns null.

Specified by:: treeStructureChanged in interface TreeModelListener
Parameters:: e - a TreeModelEvent describing changes to a tree model

treeNodesRemoved

public void treeNodesRemoved(TreeModelEvent e)

Description copied from interface: TreeModelListener

Invoked after nodes have been removed from the tree. Note that if a subtree is removed from the tree, this method may only be invoked once for the root of the removed subtree, not once for each individual set of siblings removed.

Use e.getPath() to get the former parent of the deleted node(s). e.getChildIndices() returns, in ascending order, the index(es) the node(s) had before being deleted.

Specified by:: treeNodesRemoved in interface TreeModelListener
Parameters:: e - a TreeModelEvent describing changes to a tree model

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