/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.drools.examples.sudoku.swing;

import java.util.EventListener;

/**
 * Defines the callbacks that can be implemented to listen to events from a SudokuGridModel.
 * 
 * @see SudokuGridModel
 */
public interface SudokuGridListener  extends EventListener {
   /**
    * Fired when a cell in the Sudoku grid is resolved for the first time to a specific value
    * 
    * @param ev an event containing the cell which is resolved along with the value it now has
    */
   public void restart(SudokuGridEvent ev);

   /**
    * Fired when a cell in the Sudoku grid is updated to a new value
    * 
    * @param ev an event containing the cell which is updated along with the value it now has
    */
   public void cellModified(SudokuGridEvent ev);
}
