org.apache.click.extras.tree
Interface TreeListener

All Superinterfaces:

Serializable

All Known Subinterfaces:

Tree.JavascriptHandler

All Known Implementing Classes:

CheckboxTree.CheckboxCookieHandler, CheckboxTree.CheckboxSessionHandler, Tree.CookieHandler, Tree.SessionHandler

public interface TreeListener
extends Serializable

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.

Method Summary

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

Method Detail

nodeSelected

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

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

previousState - contains the previous selected state

nodeDeselected

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

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

previousState - contains the previous selected state

nodeExpanded

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

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

previousState - contains the previous expanded state

nodeCollapsed

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

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

previousState - contains the previous expanded state