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| import java.awt.*;
import javax.swing.*;
import java.awt.image.*;
import javax.imageio.*;
import java.awt.event.*;
class InvisiblePanel extends JPanel
{
public void paint(Graphics g)
{
paintChildren(g);
}
}
public class BackgroundWindow extends JFrame implements MouseListener, MouseMotionListener
{
final int delay = 1;
int x, y, w, h,
oldX, oldY,
mouseX = 0,
mouseY = 0;
long time;
BufferedImage image,
bgImage,
bgBuffer,
windowBuffer,
nativeImage;
Robot rob;
public BackgroundWindow(String picture)
{
x = 0; y = 0;
try{
image = ImageIO.read(getClass().getResource(picture));
} catch (Throwable e) {image = null;}
w = image.getWidth();
h = image.getHeight();
setSize(w, h);
addMouseListener(this);
addMouseMotionListener(this);
setContentPane(new InvisiblePanel());
}
public void paint(Graphics windowGraphics)
{
if(nativeImage == null || bgImage == null) {
nativeImage = getGraphicsConfiguration().createCompatibleImage(w, h);
windowBuffer = getGraphicsConfiguration().createCompatibleImage(w, h);
setVisible(false);
try{
Thread.sleep(100);
rob = new Robot(getGraphicsConfiguration().getDevice());
}
catch(Exception e) {System.exit(1);}
bgImage = rob.createScreenCapture(new Rectangle(x, y, w, h));
bgBuffer = rob.createScreenCapture(new Rectangle(x, y, w, h));
setVisible(true);
}
Graphics g = windowBuffer.getGraphics();
nativeImage.getGraphics().drawImage(bgImage, 0, 0, this);
nativeImage.getGraphics().drawImage(image, 0, 0, this);
g.drawImage(nativeImage, 0, 0, this);
getContentPane().paint(g);
windowGraphics.drawImage(windowBuffer, 0, 0, this);
}
public void repaint()
{
bgImage = null;
super.repaint();
}
public void setLocation(int newX, int newY)
{
if(bgBuffer != null) {
int dx = newX - x;
int dy = newY - y;
bgBuffer.getGraphics().drawImage(bgImage, -dx, -dy, this);
if(dx > 0) {
int my = dy;
if(my < 0) my = -my;
Rectangle r = new Rectangle(x + w, y-my, dx, h+my*2);
Image strip = rob.createScreenCapture(r);
bgBuffer.getGraphics().drawImage(strip, w-dx, -dy-my, this);
}
else if(dx < 0) {
int my = dy;
if(my < 0) my = -my;
Rectangle r = new Rectangle(x+dx, y-my, -dx, h+my*2);
Image strip = rob.createScreenCapture(r);
bgBuffer.getGraphics().drawImage(strip, 0, -dy-my, this);
}
if(dy > 0) {
Rectangle r = new Rectangle(x, y+h, w, dy);
Image strip = rob.createScreenCapture(r);
bgBuffer.getGraphics().drawImage(strip, -dx, h-dy, this);
}
else if(dy < 0) {
Rectangle r = new Rectangle(x, y+dy, w, -dy);
Image strip = rob.createScreenCapture(r);
bgBuffer.getGraphics().drawImage(strip, -dx, 0, this);
}
bgImage.getGraphics().drawImage(bgBuffer, 0, 0, this);
this.x = newX;
this.y = newY;
paint(getGraphics());
}
super.setLocation(x, y);
pause(1); }
public void mousePressed(MouseEvent e){mouseX = e.getX(); mouseY = e.getY();}
public void mouseReleased(MouseEvent e){mouseX = e.getX(); mouseY = e.getY();}
public void mouseClicked(MouseEvent e){mouseX = e.getX(); mouseY = e.getY();}
public void mouseEntered(MouseEvent e){mouseX = e.getX(); mouseY = e.getY();}
public void mouseExited(MouseEvent e){mouseX = e.getX(); mouseY = e.getY();}
public void mouseDragged(MouseEvent e){
long now = System.currentTimeMillis();
if(now - time < delay) return;
time = now;
int dx = e.getX() - mouseX;
int dy = e.getY() - mouseY;
setLocation(x + dx, y + dy);
mouseX = e.getX() - dx; mouseY = e.getY() - dy;
}
public void mouseMoved(MouseEvent e){}
static void pause(long time) {
try{ Thread.sleep(time);}
catch(Exception e){}
}
} |
