operatortreemodel.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 edu.udo.cs.yale.operator.OperatorChain;

import java.util.List;
import java.util.LinkedList;
import java.util.Iterator;
import javax.swing.tree.*;
import javax.swing.event.*;

/** A TreeModel hiding an operator (which itself already has a tree-like structure).
 *  Most of the method calls delegate to an operator. Events can be fired when 
 *  operators are inserted or removed.
 */
public class OperatorTreeModel implements TreeModel {

    private Operator root;
    private List treeModelListeners = new LinkedList();

    public OperatorTreeModel(Operator root) {
	this.root = root;
    }

    public Object getRoot() { return root; }

    public Object getChild(Object parent, int index) {
	if (parent instanceof OperatorChain) {
	    return ((OperatorChain)parent).getOperator(index);
	} else return null; 
    }

    public int getChildCount(Object parent) {
	if (parent instanceof OperatorChain) {
	    return ((OperatorChain)parent).getNumberOfOperators();
	} else return 0; 
    }

    public int getIndexOfChild(Object parent, Object child) {
	if (parent instanceof OperatorChain) {
	    return ((OperatorChain)parent).getIndexOfOperator((Operator)child);
	} else return -1; 
    }

    public boolean isLeaf(Object node) {
	return getChildCount(node) == 0;
    }

    public void valueForPathChanged(TreePath path, Object node) {
	Operator op = (Operator)path.getLastPathComponent();
	op.rename(((String)node).trim());
	YaleGUI.getMainFrame().experimentChanged();
    }

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

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

    

    public void fireOperatorInserted(Object source, TreePath path, int index, Operator operator) {
	Iterator i = treeModelListeners.iterator();
	while (i.hasNext()) {
	    ((TreeModelListener)i.next()).treeNodesInserted(new TreeModelEvent(source, path, new int[] { index }, new Object[] { operator }));
	}
    }

    public void fireOperatorRemoved(Object source, TreePath path, int index, Operator operator) {
	Iterator i = treeModelListeners.iterator();
	while (i.hasNext()) {
	    ((TreeModelListener)i.next()).treeNodesRemoved(new TreeModelEvent(source, path, new int[] { index }, new Object[] { operator }));
	}
    }

    public void fireOperatorRenamed(Object source, TreePath path) {
	Iterator i = treeModelListeners.iterator();
	while (i.hasNext()) {
	    ((TreeModelListener)i.next()).treeNodesChanged(new TreeModelEvent(source, path));
	}
    }

    public void fireOperatorChanged(Object source, TreePath path) {
	Iterator i = treeModelListeners.iterator();
	while (i.hasNext()) {
	    ((TreeModelListener)i.next()).treeNodesChanged(new TreeModelEvent(source, path));
	}
    }

    public void fireStructureChanged(Object source, TreePath path) {
	Iterator i = treeModelListeners.iterator();
	while (i.hasNext()) {
	    ((TreeModelListener)i.next()).treeStructureChanged(new TreeModelEvent(source, path));
	}
    }
}