treetablemodeladapter.java

java jtable功能的实现

package view;

import javax.swing.JTree;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.table.AbstractTableModel;
/*
 * %W% %E%
 *
 * Copyright 1997, 1998 Sun Microsystems, Inc. All Rights Reserved.
 * 
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 * without modification, are permitted provided that the following
 * conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright
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 *   
 * - Redistribution in binary form must reproduce the above
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 *   provided with the distribution. 
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 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.  
 * 
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY
 * DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT OF OR
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 */
import javax.swing.tree.TreePath;

/**
 * This is a wrapper class takes a TreeTableModel and implements the table model
 * interface. The implementation is trivial, with all of the event dispatching
 * support provided by the superclass: the AbstractTableModel.
 * 
 * @version %I% %G%
 * 
 * @author Philip Milne
 * @author Scott Violet
 */

@SuppressWarnings("serial")
public class TreeTableModelAdapter extends AbstractTableModel {
	JTree tree;

	TreeTableModel treeTableModel;

	public TreeTableModelAdapter(TreeTableModel treeTableModel, JTree tree) {
		this.tree = tree;
		this.treeTableModel = treeTableModel;

		tree.addTreeExpansionListener(new TreeExpansionListener() {
			// Don't use fireTableRowsInserted() here;
			// the selection model would get updated twice.
			public void treeExpanded(TreeExpansionEvent event) {
				fireTableDataChanged();
			}

			public void treeCollapsed(TreeExpansionEvent event) {
				fireTableDataChanged();
			}
		});
	}

	// Wrappers, implementing TableModel interface.

	public int getColumnCount() {
		return treeTableModel.getColumnCount();
	}

	public String getColumnName(int column) {
		return treeTableModel.getColumnName(column);
	}

	@SuppressWarnings("unchecked")
	public Class getColumnClass(int column) {
		return treeTableModel.getColumnClass(column);
	}

	public int getRowCount() {
		return tree.getRowCount();
	}

	protected Object nodeForRow(int row) {
		TreePath treePath = tree.getPathForRow(row);
		return treePath.getLastPathComponent();
	}

	public Object getValueAt(int row, int column) {
		return treeTableModel.getValueAt(nodeForRow(row), column);
	}

	public boolean isCellEditable(int row, int column) {
		return treeTableModel.isCellEditable(nodeForRow(row), column);
	}

	public void setValueAt(Object value, int row, int column) {
		treeTableModel.setValueAt(value, nodeForRow(row), column);
	}
}