Resúmenes

Nella cartella src/main/java andremo ad elencare i package di seguito, mentre nella cartella src/main/resources/images si trovano le immagini dell'omino che si muove.

PACKAGE: application

Per quanto riguarda il file Main.java:

package application;

public class Main {
    public static void main(String[] args) {
        MainApplication.main(args);
    }
}

Per quanto riguarda il file MainApplication.java:

package application;

import application.controller.MovementController;
import application.view.GraphicPanel;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class MainApplication extends Application {
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        GraphicPanel gp = new GraphicPanel();
        MovementController controller = new MovementController(gp);
        gp.addController(controller);
        Scene scene = new Scene(gp);
        primaryStage.setScene(scene);
        primaryStage.setWidth(800);
        primaryStage.setHeight(800);
        primaryStage.setTitle("Java FX animation");
        primaryStage.show();
        GameLoop gameLoop = new GameLoop(controller);
        gameLoop.start();
    }
}

Per quanto riguarda il file GameLoop.java:

package application;

import application.controller.MovementController;
import javafx.animation.AnimationTimer;

public class GameLoop extends AnimationTimer {
    private MovementController controller;
    private long previousTime = 0;
    private long frequency = 60 * 1000000;

    public GameLoop(MovementController controller) {
        this.controller = controller;
    }

    @Override
    public void handle(long now) {
        if(now-previousTime >= frequency) {
            controller.update();
            previousTime = now;
        }
    }
}

PACKAGE: application.controller

Per quanto riguarda il file MovementController.java:

package application.controller;

import application.model.Game;
import application.view.GraphicPanel;
import javafx.event.EventHandler;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;

public class MovementController implements EventHandler<KeyEvent> {
    private GraphicPanel gp;

    public MovementController(GraphicPanel gp) {
        this.gp = gp;
    }

    public void update() {
        gp.update();
    }

    @Override
    public void handle(KeyEvent event) {
        if(event.getCode() != KeyCode.RIGHT)
            return;
        if(event.getEventType().equals(KeyEvent.KEY_PRESSED)) {
            Game.getInstance().move();
            gp.move();
        }
        else if(event.getEventType().equals(KeyEvent.KEY_RELEASED)) {
            gp.stop();
        }
    }
}

PACKAGE: application.model

Per quanto riguarda il file Game.java:

package application.model;

public class Game {
    private MyCharacter character;

    private static Game game = null;

    private Game() {
        character = new MyCharacter();
        character.x = 0;
        character.y = 0;
        character.speed = 10;
    }

    public static Game getInstance() {
        if(game == null)
            game = new Game();
        return game;
    }

    public MyCharacter getCharacter() { return character; }

    public void move() { character.x += character.speed; }
}

Per quanto riguarda il file MyCharacter.java:

package application.model;

public class MyCharacter {
    int x; int y;
    int speed;

    public int getX() { return x; }

    public int getY() { return y; }
}

PACKAGE: application.view

Per quanto riguarda il file CharacterView.java:

package application.view;

import java.util.ArrayList;
import javafx.scene.image.Image;

public class CharacterView {
    private ArrayList<Image> images;
    Image currentImage;
    int dim;
    private int index;
    private boolean move;

    CharacterView() {
        images = new ArrayList<Image>();
        dim = 147;
        move = false;
        index = 0;
        for(int i = 0; i < 10; i++) {
            Image img = new Image(getClass().getResourceAsStream
                ("/application/resources/"+i+".png"));
            images.add(img);
        }
        currentImage = images.get(0);
    }

    public void move() { move = true; }

    public void stop() { move = false; }

    public void update() {
        if(move) {
            index++;
            if(index == images.size()) index = 0;
        }
        else { index = 0; }
        currentImage = images.get(index);
    }
}

Per quanto riguarda il file GraphicPanel.java:

package application.view;

import application.controller.MovementController;
import application.model.Game;
import javafx.scene.canvas.Canvas;
import javafx.scene.layout.StackPane;

public class GraphicPanel extends StackPane {
    private CharacterView cv = new CharacterView();
    private Canvas canvas;

    public GraphicPanel() {
        canvas = new Canvas();
        canvas.setFocusTraversable(true);
        getChildren().add(canvas);
        canvas.widthProperty().bind(this.widthProperty());
        canvas.heightProperty().bind(this.heightProperty());
    }

    public void addController(MovementController controller) {
        canvas.setOnKeyPressed(controller);
        canvas.setOnKeyReleased(controller);
    }

    private void draw() {
        canvas.getGraphicsContext2D().clearRect(0, 0, canvas.getWidth(), canvas.getHeight());
        int x = Game.getInstance().getCharacter().getX();
        int y = Game.getInstance().getCharacter().getY();
        canvas.getGraphicsContext2D().drawImage(cv.currentImage, x, y, cv.dim, cv.dim);
    }

    public void move() { cv.move(); }

    public void stop() { cv.stop(); }

    public void update() {
        cv.update();
        draw();
    }
}