| re: when clicking a JButton animation starts but keys stops working
here is the full code what I have done till today
It starts autmatically but when I click New Game, no key works
to obtain mainwindow press 'P'
import java.awt.*;
import java.awt.font.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.event.*;
public class mainwin extends JPanel
{
BufferedImage image;
JButton ngame;
Invaders1 inv;
String text = "COMBAT MISSION";
String categories[] = { "Save1","Save2" };
JButton res,game,load,exit,save,cred;
JScrollPane scrollpane;
public mainwin(BufferedImage image)
{
this.image=image;
this.inv = inv;
ngame = new JButton("New Game");
res = new JButton("Resume");
//game = new JButton("New Game");
load = new JButton("Load");
save = new JButton("Save");
cred = new JButton("Credits");
exit = new JButton("Exit");
JList list = new JList(categories);
scrollpane = new JScrollPane(list);
event action = new event();
keyevent kaction = new keyevent();
add(ngame);
addKeyListener(kaction);
ngame.addActionListener(action);
exit.addActionListener(action);
save.addActionListener(action);
load.addActionListener(action);
//game.addActionListener(action);
add(res);
//add(game);
add(load);
add(save);
add(cred);
add(exit);
}
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
int w = getWidth();
int h = getHeight();
// Draw image, centered.
int x = (w - image.getWidth())/2;
int y = (h - image.getHeight())/2;
g2.drawImage(image, x, y, this);
// Draw text centered over image.
//Font font = g2.getFont().deriveFont(66f);
Font font = new Font("Serif",Font.BOLD+Font.ITALIC,80);
g2.setFont(font);
FontRenderContext frc = g2.getFontRenderContext();
float width = (float)font.getStringBounds(text, frc).getWidth();
LineMetrics lm = font.getLineMetrics(text, frc);
float sx = (w - width)/2;
float sy = (h + lm.getHeight())/2 - lm.getDescent()+180;
g2.setPaint(Color.red);
g2.drawString(text, sx, sy);
}
public class event extends JFrame implements ActionListener
{
private int x,sav=0;
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==ngame)
inv.game();
if(e.getSource()==exit)
{
if(sav==0)
{
x=JOptionPane.showConfirmDialog(null, "Do you want to save your game");
if(x==0)
{
JOptionPane.showInputDialog(null,"Enter the file name");
System.exit(0);
}
else if(x==1)
System.exit(0);
}
else
System.exit(0);
}
else if(e.getSource()==save)
{
sav++;
JOptionPane.showInputDialog(null,"Enter the file name");
}
else if(e.getSource()==load)
{
JFrame f1 = new JFrame();
f1.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
f1.setSize(300,400);
f1.getContentPane().add(scrollpane, BorderLayout.CENTER);
f1.setVisible(true);
}
}
}
public class keyevent extends JFrame implements KeyListener
{
public void keyPressed(KeyEvent e)
{
JOptionPane.showMessageDialog(null,"Enter the file name");
int key = e.getKeyCode();
if(key == KeyEvent.VK_LEFT)
{
JOptionPane.showMessageDialog(null,"dfasdme");
}
else if(key == 27)
System.exit(0);
}
public void keyReleased(KeyEvent e)
{}
public void keyTyped(KeyEvent e)
{}
}
public static void main(String[] args) throws IOException
{
String path ="mains.jpg";
BufferedImage image = ImageIO.read(new File(path));
JFrame j1 = new JFrame();
mainwin test = new mainwin(image);
Invaders1 inv = new Invaders1();
inv.game();
j1.add(test);
j1.setSize(800,600);
j1.setVisible(true);
}
}
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;
import java.net.URL;
import java.util.HashMap;
import java.awt.event.*;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Invaders1 extends Canvas implements KeyListener{
public static final int WIDTH = 800;
public static final int HEIGHT =600;
public static final int SPEED = 10;
public boolean loop=true,explosion=false, Missile=false,invad=false, missile=false, Missile1=false, missile1=false,Monster1=true,Monster2=true, Monster3=true,Monster4=true,Player=true;
public BufferStrategy strategy;
public HashMap sprites;
public Rectangle Ms,Ms1,In1,M1,M2,M3,M4,P;
public int posX,pX,pY,posY,vX,t=0,posX1,posY1,mX,mY,m1X,m1Y,M X,MY,M1X,M1Y,inX,inY,INX,INY;
public long usedTime;
public Invaders1() {
sprites = new HashMap();
INX=inX=posX = posX1=WIDTH;
INY=inY=posY = posY1=HEIGHT/2-150;
vX = 2;
mX=m1X=MX=M1X=pX=40; mY=m1Y=MY=M1Y=pY=350;
P = new Rectangle(pX,pY,32,32);
Ms = new Rectangle(mX,mY,32,32);
Ms1 = new Rectangle(m1X,m1Y,60,15);
M1= new Rectangle(posX,posX,32,32);
M2= new Rectangle(posX-30,posY-30,32,32);
M3= new Rectangle(posX-60,posY-60,32,32);
M4= new Rectangle(posX-90,posY-90,32,32);
In1= new Rectangle(inX,inY,25,25);
addKeyListener(this);
JFrame ventana = new JFrame("Invaders");
JPanel panel = (JPanel)ventana.getContentPane();
setBounds(0,0,WIDTH,HEIGHT);
panel.setPreferredSize(new Dimension(WIDTH,HEIGHT));
panel.setLayout(null);
panel.add(this);
ventana.setBounds(0,0,WIDTH,HEIGHT);
ventana.setVisible(true);
ventana.addWindowListener( new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
ventana.setResizable(false);
createBufferStrategy(2);
strategy = getBufferStrategy();
requestFocus();
}
public BufferedImage loadImage(String nombre) {
URL url=null;
try {
url = getClass().getClassLoader().getResource(nombre);
return ImageIO.read(url);
} catch (Exception e) {
System.out.println("No image found " + nombre +" de "+url);
System.out.println("location error : "+e.getClass().getName()+" "+e.getMessage());
System.exit(0);
return null;
}
}
public BufferedImage getSprite(String nombre) {
BufferedImage img = (BufferedImage)sprites.get(nombre);
if (img == null) {
img = loadImage(nombre);
sprites.put(nombre,img);
}
return img;
}
public void paintWorld() {
Graphics2D g = (Graphics2D)strategy.getDrawGraphics();
g.setPaint(new TexturePaint(getSprite("oceano.gif"), new Rectangle(t,0,getSprite("oceano.gif").getWidth(),g etSprite("oceano.gif").getHeight())));
g.fillRect(0,0,getWidth(),getHeight());
M1= new Rectangle(posX1,posY1,32,32);
M2= new Rectangle(posX1-30,posY1-30,32,32);
M3= new Rectangle(posX1-60,posY1-60,32,32);
M4= new Rectangle(posX1-90,posY1-90,32,32);
if(Monster1)
g.drawImage(getSprite("bicho.gif"), posX1, posY1,this);
if(Monster2)
g.drawImage(getSprite("bicho.gif"), posX1-30, posY1-30,this);
if(Monster3)
g.drawImage(getSprite("bicho.gif"), posX1-60, posY1-60,this);
if(Monster4)
g.drawImage(getSprite("bicho.gif"), posX1-90, posY1-90,this);
for(int k=0;k<5;k++)
{
In1 =new Rectangle(inX,inY,25,25);
if(invad)
g.drawImage(getSprite("invader.jpg"),inX,inY,this) ;
inX+=30;
inY+=30;
}
if(Player)
g.drawImage(getSprite("nave.gif"),pX,pY,this);
if(explosion)
{
long extime=System.currentTimeMillis();
g.drawImage(getSprite("explosion.gif"),pX,pY,this) ;
long exusTime=System.currentTimeMillis()-extime;
if(exusTime>.25)
explosion=false;
}
if(Missile1)
{m1X=M1X; m1Y=M1Y; Missile1=false;}
if(Missile)
{mX=MX; mY=MY; Missile=false;}
if(missile)
{
g.drawImage(getSprite("misil.gif"),mX,mY,this); mX+=10;
Ms = new Rectangle(mX,mY,32,32);
}
if(missile1)
{
g.drawImage(getSprite("rocket.gif"),m1X,m1Y,this); m1X+=10;
Ms1 = new Rectangle(m1X,m1Y,60,15);
}
if (usedTime > 0)
g.drawString(String.valueOf(1000/usedTime)+" fps",0,HEIGHT-50);
else
g.drawString("--- fps",0,HEIGHT-50);
strategy.show();
}
public void updateWorld() {
posX -= vX;
posX1=posX;
posY1=posY;
if(posX<0)
{
posX=WIDTH;
invad=true;
Monster1=Monster2=Monster3=Monster4=false;
}
INX-=vX;
inX=INX;
inY=INY;
if(INX<0)
{
invad=false;
INX=WIDTH;
Monster1=Monster2=Monster3=Monster4=true;
}
if(P.intersects(M1))
{
Player=false;
explosion=true;
}
if(P.intersects(M2))
{
Player=false;
explosion=true;
}
if(P.intersects(M3))
{
Player=false;
explosion=true;
}
if(P.intersects(M4))
{
Player=false;
explosion=true;
}
if(Ms.intersects(M1))
{
Monster1=false; missile=false;
}
if(Ms1.intersects(M1))
{
Monster1=false; missile1=false;
}
if(Ms.intersects(M2))
{
Monster2=false; missile=false;
}
if(Ms1.intersects(M2))
{
Monster2=false; missile1=false;
}
if(Ms.intersects(M3))
{
Monster3=false; missile=false;
}
if(Ms1.intersects(M3))
{
Monster1=false; missile1=false;
}
if(Ms.intersects(M4))
{
Monster4=false; missile=false;
}
if(Ms1.intersects(M4))
{
Monster4=false; missile1=false;
}
}
public void keyPressed(KeyEvent e)
{
int key = e.getKeyCode();
if(Player)
{
if(key== KeyEvent.VK_LEFT)
{ pX-=10; MX=M1X=pX;}
else if(key== KeyEvent.VK_RIGHT)
{ pX+=10; MX=M1X=pX;}
else if(key== KeyEvent.VK_UP)
{ pY-=10; MY=M1Y=pY;}
else if(key== KeyEvent.VK_DOWN)
{ pY+=10; MY=M1Y=pY;}
else if(key==27)
System.exit(0);
else if(key== KeyEvent.VK_P)
{
if(loop==true)
loop=false;
else
{
loop=true;
game();
}
}
else if(key ==32)
{ Missile=missile=true;}
else if(key==17)
{Missile1=missile1=true;}
P = new Rectangle(pX,pY,32,32);
}
}
public void keyReleased(KeyEvent e)
{}
public void keyTyped(KeyEvent e)
{}
public void game() {
usedTime=1000;
while (loop) {
long startTime = System.currentTimeMillis();
updateWorld();
paintWorld();
t--;
usedTime = System.currentTimeMillis()-startTime;
try {
Thread.sleep(SPEED);
} catch (InterruptedException e) {}
}
}
/*public static void main(String[] args) {
Invaders1 inv = new Invaders1();
inv.game();
}*/
}
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