typedatatreemodel.java

java 调用windows的api

package org.jawin.browser.tree;

import javax.swing.tree.*;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeModelEvent;
import org.jawin.browser.data.*;
import java.util.Vector;

/**
 * A Tree Model that supports storing BaseData objects
 *
 * <p>Title: Jawin Code Generation GUI</p>
 * <p>Description: GUI for exploring type libraries and generating Java code</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: Open Source Incentive</p>
 *
 * @author Josh Passenger
 * @version 1.0
 */

public class TypeDataTreeModel implements TreeModel
{
	private BaseData root = null;
	private Vector listeners = new Vector();

	public TypeDataTreeModel()
	{
		clear();
	}

	public Object getRoot()
	{
		return root;
	}

	public void setRoot(BaseData newRoot)
	{
		root = newRoot;

		TreeModelEvent event = new TreeModelEvent(this, new Object [] {root} );
		fireTreeStructureChangedEvent(event);
	}

	public Object getChild(Object parent, int index)
	{
		return ((BaseData) parent).getChildAt(index);
	}

	public int getChildCount(Object parent)
	{
		return ((BaseData) parent).getChildCount();
	}

	public boolean isLeaf(Object node)
	{
		return ((BaseData) node).isLeaf();
	}

	public void valueForPathChanged(TreePath path, Object newValue)
	{
		// do nothing as this tree is not editable
	}

	public int getIndexOfChild(Object parent, Object child)
	{
		return ((BaseData) parent).getIndex((TreeNode) child);
	}

	public void addTreeModelListener(TreeModelListener l)
	{
		listeners.add(l);
	}

	public void removeTreeModelListener(TreeModelListener l)
	{
		listeners.remove(l);
	}

	public void fireTreeStructureChangedEvent(TreeModelEvent event)
	{
		for (int i = 0; i < listeners.size(); i++)
		{
			getListenerAt(i).treeStructureChanged(event);
		}
	}

	public void fireTreeChanged()
	{
		TreeModelEvent event = new TreeModelEvent(this, new Object [] {root} );
		fireTreeStructureChangedEvent(event);
	}

	public TreeModelListener getListenerAt(int index)
	{
		return (TreeModelListener) listeners.get(index);
	}

	public void clear()
	{
		setRoot(new DataCollection("No project loaded", "empty", "images/function.png", null));
	}

	public void addNodeToRoot(BaseData newNode)
	{
		if (root != null)
		{
			root.addChild(newNode);
		}

		TreeModelEvent event = new TreeModelEvent(this, new Object [] {root} );
		fireTreeStructureChangedEvent(event);
	}

	/**
	 * Fetch the root node as XML
	 *
	 * @param buffer the buffer to fetch into
	 */
	public void toXML(StringBuffer buffer)
	{
		root.toXML(0, buffer);
	}
}