/*
 *  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.editor;

import gui.environment.AutomatonEnvironment;
import gui.viewer.AutomatonDrawer;
import gui.viewer.AutomatonPane;

import java.awt.event.MouseEvent;

import automata.State;

/**
 * This is a subclass of a <code>MealyArrowTool</code> for Moore 
 * machines that allows the arrow tool to change the output of 
 * a state. It is identical in every way except that, when a 
 * mouse is clicked on a state, instead of doing nothing, it 
 * prompts the user for a new state output. Other mouse methods 
 * for right-clicking and click-and-drag remain the same.
 *
 * @see #mouseClicked(MouseEvent)
 * @see automata.mealy.MooreMachine
 * @see MooreStateTool
 * @see MooreToolBox
 * @author Jinghui Lim
 *
 */
public class MooreArrowTool extends MealyArrowTool 
{
    /**
     * Instantiates a new arrow tool.
     * 
     * @param view the view where the automaton is drawn
     * @param drawer the object that draws the automaton
     * @param creator the transition creator used for editing transitions
     */
    public MooreArrowTool(AutomatonPane view, AutomatonDrawer drawer,
            TransitionCreator creator)
    {
        super(view, drawer, creator);
    }
    
    /**
     * Instantiates a new arrow tool.
     * 
     * @param view the view where the automaton is drawn
     * @param drawer the object that draws the automaton
     */            
    public MooreArrowTool(AutomatonPane view, AutomatonDrawer drawer) 
    {
        super(view, drawer);
    }
    
    /**
     * Checks if the mouse was clicked on a state, and offers to change
     * the state output if so. Otherwise, {@link ArrowTool#mouseClicked(MouseEvent)}
     * is called so that other mouse events proceed as specified in
     * <code>ArrowTool</code>.
     * 
     * @param event the mouse event
     * @see ArrowTool#mouseClicked(MouseEvent)
     */
    public void mouseClicked(MouseEvent event) 
    {
		((AutomatonEnvironment)getDrawer().getAutomaton().getEnvironmentFrame().getEnvironment()).saveStatus();
        if(event.getButton() == MouseEvent.BUTTON1)
        {
            State state = getDrawer().stateAtPoint(event.getPoint());
            if(state == null)
                super.mouseClicked(event);
            else
                MooreStateTool.editState(state);
        }
    }
}