virtual_location_rendering/Controller.java at master · mukeswebrian/virtual_location_rendering · GitHub

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package controller;


import interfaces.WorldViewer;
import myclasses.Avatar;
import myclasses.Command;
import myclasses.World;

/**
 * A controller for the World application.
 *
 * @author Brian Mukeswe
 * @contact b.mukeswe@sms.ed.ac.uk
 *
 */
public class Controller {

	private Avatar avatar; // An avatar to perform actions on behalf of the user
	private WorldViewer viewer; // A viewer to interact with the user interface

	/**
	 * Constructor for the controller
	 *
	 * @param viewer the class that receives commands from the user and
	 * shows the current state of the avatar.
	 */
	public Controller(WorldViewer viewer) {

		// connect the viewer to this controller
		this.viewer = viewer;

		init();

	}

	/**
	 * Initialise the controller
	 */
	private void init() {

		// Create an avatar
		avatar = new Avatar(World.getStartLocation());

		// Initialise the viewer
		viewer.setController(this);
		viewer.Initialise(avatar.getCurrentLocation().getView(avatar.getCurrentDirection()),
			              avatar.getCartItems(),
			              avatar.getCurrentLocation().getContents());
	}

	/**
	 * Process a user command
	 */
	public void select(Command command) {

		// Delegate processing of the command
		avatar.perform(command);

		// Refresh the viewer with the new state
		viewer.refresh(avatar.getCurrentLocation().getView(avatar.getCurrentDirection()),
				        avatar.getCartItems(),
				       avatar.getCurrentLocation().getContents());

	}

}