operatortreecelleditor.java

著名的开源仿真软件yale

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2002, 2003
 *      Simon Fischer, Ralf Klinkenberg, Ingo Mierswa, 
 *          Katharina Morik, Oliver Ritthoff
 *      Artificial Intelligence Unit
 *      Computer Science Department
 *      University of Dortmund
 *      44221 Dortmund,  Germany
 *  email: [e-mail]
 *  web:   http://yale.cs.uni-dortmund.de/
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License as 
 *  published by the Free Software Foundation; either version 2 of the
 *  License, or (at your option) any later version. 
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 *  USA.
 */
package edu.udo.cs.yale.gui;

import edu.udo.cs.yale.operator.Operator;
import javax.swing.tree.DefaultTreeCellEditor;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.JTree;
import javax.swing.ImageIcon;
import java.awt.Component;
import java.awt.Image;

/** Editor for tree cells that displays an icon and a text field. 
 *  Bugs, when there is no icon. */
public class OperatorTreeCellEditor extends DefaultTreeCellEditor {

    public OperatorTreeCellEditor(JTree tree) {
	super(tree, new DefaultTreeCellRenderer());
    }

    public Component getTreeCellEditorComponent(JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row) {
	if (value instanceof Operator) {
	    Operator op = (Operator)value;
	    value = op.getName();
	    Image img = op.getOperatorDescription().getIcon();
	    ImageIcon icon = (img == null) ? new ImageIcon(new java.awt.image.BufferedImage(4,24, 
											    java.awt.image.BufferedImage.TYPE_INT_ARGB)) : new ImageIcon(img);
	    editingIcon = icon;
	    renderer.setClosedIcon(icon);
	    renderer.setOpenIcon(icon);
	    renderer.setLeafIcon(icon);
							   
	}
	return super.getTreeCellEditorComponent(tree, value, isSelected, expanded, leaf, row);
   }

}