MazeApplication

/**
 *
 */
package falstad;

import generation.Order;

import java.awt.event.KeyListener;
import java.io.File;

import javax.swing.JFrame;


/**
 * This class is a wrapper class to startup the Maze game as a Java application
 *
 *
 * This code is refactored code from Maze.java by Paul Falstad, www.falstad.com, Copyright (C) 1998, all rights reserved
 * Paul Falstad granted permission to modify and use code for teaching purposes.
 * Refactored by Peter Kemper
 *
 * TODO: use logger for output instead of Sys.out
 */
public class MazeApplication extends JFrame {

	// not used, just to make the compiler, static code checker happy
	private static final long serialVersionUID = 1L;

	private KeyListener kl ;

	private MazeController controller ;
	/**
	 * Constructor
	 */
	public MazeApplication() {
		super() ;
		System.out.println("MazeApplication: maze will be generated with a randomized algorithm.");
		controller = new MazeController() ;
		init() ;
	}

	/**
	 * Constructor that loads a maze from a given file or uses a particular method to generate a maze
	 */
	public MazeApplication(String parameter) {
		super() ;
		// scan parameters
		// Case 1: Prim
		if ("Prim".equalsIgnoreCase(parameter))
		{
			System.out.println("MazeApplication: generating random maze with Prim's algorithm");
			controller = new MazeController(Order.Builder.Prim) ;
			init() ;
			return ;
		}
		// Case 2: Eller
		if ("Eller".equalsIgnoreCase(parameter))
		{
			System.out.println("MazeApplication: generating random maze with Eller's algorithm");
			controller = new MazeController(Order.Builder.Eller) ;
			init();
			return;
		}
		// Case 3: a file
		File f = new File(parameter) ;
		if (f.exists() && f.canRead())
		{
			System.out.println("MazeApplication: loading maze from file: " + parameter);
			controller = new MazeController(parameter) ;
			init();
			return ;
		}
		// Default case:
		System.out.println("MazeApplication: unknown parameter value: " + parameter + " ignored, operating in default mode.");
		controller = new MazeController() ;
		init() ;
	}

	/**
	 * Initializes some internals and puts the game on display.
	 */
	private void init() {
		add(controller.getPanel()) ;

		setSize(400, 400);
		setVisible(true);

		// focus should be on the JFrame of the MazeApplication and not on the maze panel
		// such that the SimpleKeyListener kl is used
		setFocusable(true) ;

		controller.init();

		kl = new SimpleKeyListener(this, controller);
		addKeyListener(kl);
	}

	/**
	 * Main method to launch Maze as a java application.
	 * The application can be operated in two ways. The intended normal operation is to provide no parameters
	 * and the maze will be generated by a particular algorithm. If a filename is given, the maze will be loaded
	 * from that file. The latter option is useful for development to check particular mazes.
	 * @param args is optional, first parameter is a filename with a given maze
	 */
	public static void main(String[] args) {
		MazeApplication a ;
		switch (args.length) {
		case 1 : a = new MazeApplication(args[0]);
		break ;
		case 0 :
		default : a = new MazeApplication() ;
		break ;
		}
		a.repaint() ;
	}

}