// **********************************************************************
//
// Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package IceGridGUI.Application;

import javax.swing.tree.DefaultTreeModel;

import java.util.Enumeration;

import IceGrid.*;
import IceGridGUI.*;

//
// An editable TreeNode that holds a list of children
//
abstract class ListTreeNode extends TreeNode
{
    public Enumeration children()
    {
	return new Enumeration()
	    {
		public boolean hasMoreElements()
		{
		    return _p.hasNext();
		}

		public Object nextElement()
		{
		    return _p.next();
		}
		
		private java.util.Iterator _p = _children.iterator();
	    };
    }
    
    public boolean getAllowsChildren()
    {
	return true;
    }
    
    public javax.swing.tree.TreeNode getChildAt(int childIndex)
    {
	if(childIndex < 0)
	{
	    throw new ArrayIndexOutOfBoundsException(childIndex);
	}
	else if(childIndex < _children.size())
	{
	    return (javax.swing.tree.TreeNode)_children.get(childIndex);
	}
	else
	{
	    throw new ArrayIndexOutOfBoundsException(childIndex);
	}
    }
   
    public int getChildCount()
    {
	return _children.size();
    }
    
    public int getIndex(javax.swing.tree.TreeNode node)
    {
	return _children.indexOf(node);
    }

    public boolean isLeaf()
    {
	return _children.isEmpty();
    }

    public Editor getEditor()
    {
	if(_editor == null)
	{
	    _editor = new Editor();
	}
	return _editor;
    }

    protected Editor createEditor()
    {
	assert false;
	return null;
    }

    protected ListTreeNode(boolean brandNew, TreeNode parent, String id)
    {
	super(parent, id);
	_editable = new Editable(brandNew);
    }

    void write(XMLWriter writer) throws java.io.IOException
    {
	java.util.Iterator p = _children.iterator();
	while(p.hasNext())
	{
	    TreeNode node = (TreeNode)p.next();
	    node.write(writer);
	}
    }

    void insertChild(TreeNode child, boolean fireEvent)
	throws UpdateFailedException
    {
	DefaultTreeModel treeModel = fireEvent ?
	    getRoot().getTreeModel() : null;
	
	if(!insertSortedChild(child, _children, treeModel))
	{
	    throw new UpdateFailedException(this, child.getId());
	}
    }

    void insertChildren(java.util.List newChildren, boolean fireEvent)
	throws UpdateFailedException
    {
	DefaultTreeModel treeModel = fireEvent ?
	    getRoot().getTreeModel() : null;
	
	String badChildId = insertSortedChildren(newChildren, _children, treeModel);
	
	if(badChildId != null)
	{
	    throw new UpdateFailedException(this, badChildId);
	}
    }

    int removeChild(TreeNode child)
    {
	int index = getIndex(child);
	_children.remove(child);
	
	getRoot().getTreeModel().nodesWereRemoved(this,
						  new int[]{index},
						  new Object[]{child});
	return index;
    }

    void removeChildren(String[] childIds)
    {
	removeSortedChildren(childIds, _children, getRoot().getTreeModel());
    }

    void childrenChanged(java.util.List children)
    {
	childrenChanged(children, getRoot().getTreeModel());
    }

    Editable getEditable()
    {
	return _editable;
    }

    javax.swing.ComboBoxModel createComboBoxModel()
    {
	return new ComboBoxModel();
    }
    
    javax.swing.ComboBoxModel createComboBoxModel(Object item)
    {
	return new ComboBoxModel(item);
    }
    
    //
    // Adapts ListTreeNode to a ComboBoxModel
    //
    class ComboBoxModel extends javax.swing.AbstractListModel 
	implements javax.swing.ComboBoxModel
    {
	public Object getElementAt(int index)
	{
	    if(_firstItem != null)
	    {
		if(index == 0)
		{
		    return _firstItem;
		}
		else
		{
		    return getChildAt(index - 1);
		}
	    }
	    else
	    {
		return getChildAt(index);
	    }
	}

	public int getSize()
	{
	    if(_firstItem != null)
	    {
		return getChildCount() + 1;
	    }
	    else
	    {
		return getChildCount();
	    }
	}
	
	public Object getSelectedItem()
	{
	    return _selectedItem;
	}

	public void setSelectedItem(Object obj)
	{
	    if(obj != _selectedItem)
	    {
		_selectedItem = obj;
		fireContentsChanged(this, -1, -1);
	    }
	}

	ComboBoxModel(Object firstItem)
	{
	    _firstItem = firstItem;
	}

	ComboBoxModel()
	{
	    _firstItem = null;
	}

	private final Object _firstItem;
	private Object _selectedItem;
    }

    protected final java.util.LinkedList _children = new java.util.LinkedList();
    protected Editable _editable;

    static private Editor _editor;
}