package jaxcent.yui;

import jaxcent.*;

/**
  * Objects of class TreeNode correspond to nodes of a YUI Tree.
  */

public class TreeNode {

    String nodeVarName;
    jaxcent.yui.Tree tree;
    boolean editable;
    boolean dateNode;
    Object userData;

    // Constructor.  Used internally.
    TreeNode( jaxcent.yui.Tree tree, boolean editable, boolean dateNode )
    {
        nodeVarName = Tree.getJSVar();
        this.tree = tree;
        this.editable = editable;
        this.dateNode = dateNode;
        tree.nodeAdded( this );
    }

    // Retrieve the internal JavaScript name for this node.
    String getVarName()
    {
        return nodeVarName;
    }

    /** Add a non-editable text node as a child of this node.
     */
    public TreeNode addTextNode( String text ) throws Jaxception
    {
        return tree.addTextNode( text, false, nodeVarName );
    }

    /** Add an editable text node as a child of this node.
     */
    public TreeNode addEditableTextNode( String text ) throws Jaxception
    {
        return tree.addTextNode( text, true, nodeVarName );
    }

    /** Add a non-editable date node as a child of this node.
     */
    public TreeNode addDateNode( java.util.Date date ) throws Jaxception
    {
        return tree.addDateNode( date, false, nodeVarName );
    }

    /** Add an editable date node as a child of this node.
     */
    public TreeNode addEditableDateNode( java.util.Date date ) throws Jaxception
    {
        return tree.addDateNode( date, true, nodeVarName );
    }

    /** Return the current lable of this node.
     */
    public String getNodeLabel() throws Jaxception
    {
        return tree.evalJavaScriptCode( nodeVarName + ".label", false, null );
    }


    /** Remove the node and all its children from the tree.
      */
    public void delete() throws Jaxception
    {
        tree.deleteNode( nodeVarName );
    }


    /** Expand the node.
      */
    public void expand() throws Jaxception
    {
        tree.execJavaScriptCode( nodeVarName + ".expand();" );
    }

    /** Collapse the node.
     */
    public void collapse() throws Jaxception
    {
        tree.execJavaScriptCode( nodeVarName + ".collapse();" );
    }

    /** Is this an editable node?
     */
    public boolean isEditableNode()
    {
        return editable;
    }

    /** Is this a text node?
     */
    public boolean isTextNode()
    {
        return ! dateNode;
    }

    /** Is this a date node?
     */
    public boolean isDateNode()
    {
        return ! dateNode;
    }

    /** Attach user data to node.
     */
    public void setUserData( Object userData )
    {
        this.userData = userData;
    }

    /** Return any user data attached to node.
     */
    public Object getUserData()
    {
        return userData;
    }
}