/*
 *  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.TransitionTool;
import gui.viewer.AutomatonDrawer;
import gui.viewer.AutomatonPane;

import java.awt.event.MouseEvent;

import automata.State;

/**
 * A tool that handles the creation of transitions for the FSA to regular
 * expression conversion. This simply calls the appropriate <CODE>FSAToREController</CODE>
 * method.
 * 
 * @see gui.regular.FSAToREController#transitionCreate
 * 
 * @author Thomas Finley
 */

public class RegularTransitionTool extends TransitionTool {
	/**
	 * Instantiates a new transition tool.
	 * 
	 * @param view
	 *            the view where the automaton is drawn
	 * @param drawer
	 *            the object that draws the automaton
	 * @param controller
	 *            the controller object for the transition from an FSA to an RE
	 */
	public RegularTransitionTool(AutomatonPane view, AutomatonDrawer drawer,
			FSAToREController controller) {
		super(view, drawer);
		this.controller = controller;
	}

	/**
	 * When we release the mouse, a transition from the start state to this
	 * released state must be formed.
	 * 
	 * @param event
	 *            the mouse event
	 */
	public void mouseReleased(MouseEvent event) {
		// Did we even start at a state?
		if (first == null)
			return;
		State state = getDrawer().stateAtPoint(event.getPoint());
		if (state != null) {
			controller.transitionCreate(first, state);
		}
		first = null;
		getView().repaint();
	}

	/** The regular conversion controller. */
	private FSAToREController controller;
}