How to use the inql.widgets.filetree.FileTree function in inql

files.addElement(thisObject)

        # Pass two: for files.
        for i in xrange(0, files.size()):
            f = files.elementAt(i)
            #if f.split('.')[-1] != 'html':
            curDir.add(DefaultMutableTreeNode(files.elementAt(i)))
        return curDir


if __name__ == "__main__":
    frame = JFrame("FileTree")
    frame.setForeground(Color.black)
    frame.setBackground(Color.lightGray)
    cp = frame.getContentPane()
    cp.add(FileTree().this)
    frame.pack()
    frame.setVisible(True)
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

def add_tree_selection_listener(self, listener):
        """
        Wrapper for the inner tree selection listener callback register function

        :param listener: a new listener
        :return: None
        """
        self._tree.addTreeSelectionListener(listener)


if __name__ == "__main__":
    frame = JFrame("FileTree")
    frame.setForeground(Color.black)
    frame.setBackground(Color.lightGray)
    cp = frame.getContentPane()
    cp.add(FileTree().this)
    frame.pack()
    frame.setVisible(True)
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

def __init__(self, dir=None, label=None):
        try:
            FileTree.selves.append(self)
        except AttributeError:
            FileTree.selves = []
            FileTree.selves.append(self)
        if not dir: dir = os.getcwd()
        if not label: label = "FileTree"
        dir = File(dir)
        self.dir = dir
        self.this = JPanel()
        self.this.setLayout(BorderLayout())

        # Add a label
        self.this.add(BorderLayout.PAGE_START, JLabel(label))

        # Make a tree list with all the nodes, and make it a JTree
        tree = JTree(self.addNodes(None, dir))
        tree.setRootVisible(False)
        self.tree = tree

        # Lastly, put the JTree into a JScrollPane.