net.sf.click.extras.tree
Interface TreeListener

All Known Subinterfaces:

Tree.JavascriptHandler

All Known Implementing Classes:

Tree.CookieHandler, Tree.SessionHandler

public interface TreeListener

The listener interface for receiving tree events.

A common use case for this interface is to lazily load the tree as the user is expanding node's, while traversing the tree.

Author:

Bob Schellink

Method Summary

void	nodeCollapsed(Tree tree, TreeNode node, Context context, boolean oldValue) Invoked when user collapsed the specified node.
void	nodeDeselected(Tree tree, TreeNode node, Context context, boolean oldValue) Invoked when user deselected the specified node.
void	nodeExpanded(Tree tree, TreeNode node, Context context, boolean oldValue) Invoked when user expanded the specified node.
void	nodeSelected(Tree tree, TreeNode node, Context context, boolean oldValue) Invoked when user selected the specified node.

Method Detail

nodeSelected

public void nodeSelected(Tree tree,
                         TreeNode node,
                         Context context,
                         boolean oldValue)

Invoked when user selected the specified node.

Parameters:

tree - tree the operation was made on

node - node that was selected

context - provides access to Context

oldValue - contains the previous value of selected state

nodeDeselected

public void nodeDeselected(Tree tree,
                           TreeNode node,
                           Context context,
                           boolean oldValue)

Invoked when user deselected the specified node.

Parameters:

tree - tree the operation was made on

node - node that was deselected

context - provides access to Context

oldValue - contains the previous value of selected state

nodeExpanded

public void nodeExpanded(Tree tree,
                         TreeNode node,
                         Context context,
                         boolean oldValue)

Invoked when user expanded the specified node.

Parameters:

tree - tree the operation was made on

node - node that was expanded

context - provides access to Context

oldValue - contains the previous value of expanded state

nodeCollapsed

public void nodeCollapsed(Tree tree,
                          TreeNode node,
                          Context context,
                          boolean oldValue)

Invoked when user collapsed the specified node.

Parameters:

tree - tree the operation was made on

node - node that was collapsed

context - provides access to Context

oldValue - contains the previous value of selected state