org.activemath.author.toc
Class ASyncTreeNodeDecorator

java.lang.Object
  org.activemath.author.toc.ASyncTreeNodeDecorator

All Implemented Interfaces:

EventListener, TreeModelListener

public class ASyncTreeNodeDecorator
extends Object
implements TreeModelListener

This class implements a background engine that asynchronously fetches the decoration for the tree-nodes (currently title and type) and notifies the tree when the decoration is written to.

Field Summary

protected static boolean	DEBUG
protected static org.apache.commons.logging.Log	log

Constructor Summary

ASyncTreeNodeDecorator(TreeModel treeModel, MBaseRef mbaseRef)
Starts operating and listens toe the tree-model events.

Method Summary

void	addNodeToDecorate(OJref refElt, TreePath path) To be called when needing to explicitly set the node to updated.
void	checkWholeTree()
void	treeNodesChanged(TreeModelEvent e) Calls #addNoteToDecorate for all nodes that are updated and that contain a null info.
void	treeNodesInserted(TreeModelEvent e) Calls #addNoteToDecorate for all nodes that are updated and that contain a null info.
void	treeNodesRemoved(TreeModelEvent e) Does nothing.
void	treeStructureChanged(TreeModelEvent e) Calls #addNoteToDecorate for all nodes children of the root change that contain a null info in their OJref.

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static org.apache.commons.logging.Log log

DEBUG

protected static final boolean DEBUG

Constructor Detail

ASyncTreeNodeDecorator

public ASyncTreeNodeDecorator(TreeModel treeModel,
                              MBaseRef mbaseRef)

Starts operating and listens toe the tree-model events.

Parameters:

treeModel - The model to listen to events

mbaseRef - The mbase to extract information from

Method Detail

treeNodesChanged

public void treeNodesChanged(TreeModelEvent e)

Calls #addNoteToDecorate for all nodes that are updated and that contain a null info.

Specified by:

treeNodesChanged in interface TreeModelListener

Parameters:

e - The change-event from which all paths are extracted

treeNodesInserted

public void treeNodesInserted(TreeModelEvent e)

Calls #addNoteToDecorate for all nodes that are updated and that contain a null info.

Specified by:

treeNodesInserted in interface TreeModelListener

Parameters:

e - The change-event from which all paths are extracted

treeNodesRemoved

public void treeNodesRemoved(TreeModelEvent e)

Does nothing.

Specified by:

treeNodesRemoved in interface TreeModelListener

Parameters:

e - The change-event from which all paths are extracted

treeStructureChanged

public void treeStructureChanged(TreeModelEvent e)

Calls #addNoteToDecorate for all nodes children of the root change that contain a null info in their OJref.

Specified by:

treeStructureChanged in interface TreeModelListener

Parameters:

e - The change-event from which all paths are extracted

checkWholeTree

public void checkWholeTree()

addNodeToDecorate

public void addNodeToDecorate(OJref refElt,
                              TreePath path)

To be called when needing to explicitly set the node to updated. Should not be used in principle.

Parameters:

refElt - the user-object of the node from which to extract the ID and where the OJElement.setInfo(java.lang.Object) will be called setting as result a Hashtable with keys type (the result of MBaseRef.getTypeString(org.activemath.abstractcontent.MBaseID)) and titles for the result of MBaseRef.getTypeString(org.activemath.abstractcontent.MBaseID).

path - the path allowing us to build the events