/*
 *  JFLAP - Formal Languages and Automata Package
 * 
 * 
 *  Susan H. Rodger
 *  Computer Science Department
 *  Duke University
 *  August 27, 2009

 *  Copyright (c) 2002-2009
 *  All rights reserved.

 *  JFLAP is open source software. Please see the LICENSE for terms.
 *
 */





package gui.action;

import gui.deterministic.ConversionPane;
import gui.environment.Environment;
import gui.environment.tag.CriticalTag;

import java.awt.event.ActionEvent;

import javax.swing.JOptionPane;

import automata.AutomatonChecker;
import automata.fsa.FiniteStateAutomaton;

/**
 * This is a simple action for showing the DFA form of an NFA.
 * 
 * @author Thomas Finley
 */

public class NFAToDFAAction extends FSAAction {
	/**
	 * Instantiates a new <CODE>NFAToDFAAction</CODE>.
	 * 
	 * @param automaton
	 *            the automaton that input will be simulated on
	 * @param environment
	 *            the environment object that we shall add our simulator pane to
	 */
	public NFAToDFAAction(FiniteStateAutomaton automaton,
			Environment environment) {
		super("Convert to DFA", null);
		this.automaton = automaton;
		this.environment = environment;
		/*
		 * putValue(ACCELERATOR_KEY, KeyStroke.getKeyStroke (KeyEvent.VK_R,
		 * MAIN_MENU_MASK+InputEvent.SHIFT_MASK));
		 */
	}

	/**
	 * Puts the DFA form in another window.
	 * 
	 * @param e
	 *            the action event
	 */
	public void actionPerformed(ActionEvent e) {
		if (automaton.getInitialState() == null) {
			JOptionPane.showMessageDialog(environment,
					"The automaton needs an initial state.",
					"No Initial State", JOptionPane.ERROR_MESSAGE);
			return;
		}

		AutomatonChecker ac = new AutomatonChecker();
		if (!ac.isNFA(automaton)) {
			JOptionPane.showMessageDialog(environment, "This is not an NFA!",
					"Not an NFA", JOptionPane.ERROR_MESSAGE);
			return;
		}

		ConversionPane convert = new ConversionPane(
				(FiniteStateAutomaton) automaton.clone(), environment);
		environment.add(convert, "NFA to DFA", new CriticalTag() {
		});
		environment.setActive(convert);
	}

	/** The automaton. */
	private FiniteStateAutomaton automaton;

	/** The environment. */
	private Environment environment;
}