/*
 *  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.regular;

import gui.editor.StateTool;
import gui.viewer.AutomatonDrawer;
import gui.viewer.AutomatonPane;

import java.awt.event.MouseEvent;

import automata.State;

/**
 * A tool that handles the creation of the final state for the FSA to regular
 * expression conversion.
 * 
 * @see gui.regular.FSAToREController
 * 
 * @author Thomas Finley
 */

public class RegularStateTool extends StateTool {
	/**
	 * Instantiates a new regular state tool.
	 * 
	 * @param view
	 *            the view that the automaton is drawn in
	 * @param drawer
	 *            the automaton drawer for the view
	 * @param controller
	 *            the controller object we report to
	 */
	public RegularStateTool(AutomatonPane view, AutomatonDrawer drawer,
			FSAToREController controller) {
		super(view, drawer);
		this.controller = controller;
	}

	/**
	 * When the user clicks, one creates a state.
	 * 
	 * @param event
	 *            the mouse event
	 */
	public void mousePressed(MouseEvent event) {
		if ((state = controller.stateCreate(event.getPoint())) == null)
			return;
		getView().repaint();
	}

	/**
	 * When the user drags, one moves the created state.
	 * 
	 * @param event
	 *            the mouse event
	 */
	public void mouseDragged(MouseEvent event) {
		if (state == null)
			return;
		state.setPoint(event.getPoint());
		getView().repaint();
	}

	/** The state that was created. */
	private State state = null;

	/** The controller object. */
	private FSAToREController controller;
}