/**
* Called whenever the value of the selection changes.
*
* @param e the event that characterizes the change.
*/
public void valueChanged(TreeSelectionEvent e) {
TreePath path = e.getPath();
if (path != null) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
if (node.isLeaf()) {
if (getInformation(path) != null) {
// When selecting an image information.
XmlInformation info = getInformation(path);
for (int i = 0; i < listener_list.size(); i++) {
InformationTreeSelectionListener listener =
(InformationTreeSelectionListener) listener_list.elementAt(i);
listener.select(info);
}
} else {
// When expanding a folder.
expandNode(node);
}
}
}
}
/**
* Returns the image information of the specified path, if it represents an image information.
* Otherwise returns null.
*
* @param path the tree path.
* @return the image information.
*/
protected XmlInformation getInformation(TreePath path) {
String path_str = "";
Object[] paths = path.getPath();
for (int i = 1; i < paths.length; i++) {
String name = (String) ((DefaultMutableTreeNode) paths[i]).getUserObject();
path_str += "/" + name;
}
XmlInformation info = (XmlInformation) hash_info.get(path_str);
return info;
}