Java Game Development(33) - Using the Robot

import java.awt.*;

import java.awt.event.*;

import javax.swing.ImageIcon;

import javax.swing.SwingUtilities;

public class Look extends Core implements MouseMotionListener, KeyListener {

public static void main(String[] args) {

new Look().run();

}

private Image bg;

private Robot robot;

private Point mouse; → 鼠標的位置

private Point center; → 屏幕中心的位置

private Point image; → 圖像的位置

private boolean centering;

//init

public void init() {

super.init();

mouse = new Point();

center = new Point();

image = new Point();

centering = false;

try {

robot = new Robot();

recenterMouse();

mouse.x = center.x;

mouse.y = center.y;

} catch (Exception ex) {

System.out.println("Exception 1");

}

Window w = s.getFullScreenWindow();

w.addMouseMotionListener(this);

w.addKeyListener(this);

bg = new ImageIcon("C://baby.png").getImage();

}

//繪製方法

public synchronized void draw(Graphics2D g) {

int w = s.getWidth();

int h = s.getHeight();

image.x %= w;

image.y %= h;

if (image.x < 0) {

image.x += w;

}

if (image.y < 0) {

image.y += h;

}

int x = image.x;

int y = image.y;

g.drawImage(bg, x, y, null);

g.drawImage(bg, x-w, y, null);

g.drawImage(bg, x, y-h, null);

g.drawImage(bg, x-w, y-h, null);

}

//使用Robotrecenter鼠標

private synchronized void recenterMouse() {

Window w = s.getFullScreenWindow();

if (robot != null && w.isShowing()) {

center.x = w.getWidth() / 2;

center.y = w.getHeight() / 2;

SwingUtilities.convertPointToScreen(center, w); → 這是內置方法將Point轉到屏幕

centering = true;

robot.mouseMove(center.x, center.y);

}

}

//mousemotion的監聽器

public void mouseDragged(MouseEvent e) {

mouseMoved(e);

}

public synchronized void mouseMoved(MouseEvent e) {

if (centering && center.x == e.getX() && center.y == e.getY()) {

centering = false;

} else {

int dx = e.getX() - mouse.x;

int dy = e.getY() - mouse.y;

image.x += dx;

image.y += dy;

recenterMouse();

}

mouse.x = e.getX();

mouse.y = e.getY();

}

}