transparent images at same position

import java.awt.*;

import java.awt.image.BufferedImage;

import javax.swing.*;

public class OverlappingImages extends JPanel {

BufferedImage[] images;

Point loc = new Point(100,100);

public OverlappingImages() {

createImages();

setBackground(Color.black);

}

protected void paintComponent(Graphics g) {

super.paintComponent(g);

for(int j = 0; j < images.length; j++)

g.drawImage(images[j], loc.x, loc.y, this);

}

public Dimension getPreferredSize() {

return new Dimension(300,300);

}

private void createImages() {

int w = 100, h = 100;

int type = BufferedImage.TYPE_INT_ARGB_PRE;

Rectangle clip = new Rectangle(w/3, h/3);

images = new BufferedImage[4];

for(int j = 0; j < images.length; j++) {

images[j] = new BufferedImage(w, h, type);

Graphics2D g2 = images[j].createGraphics();

int x = (j%2 == 0) ? 0 : w-clip.width;

int y = (j/2 == 1) ? h-clip.height : 0;

clip.setLocation(x, y);

g2.setClip(clip);

g2.setPaint(getGradient(j, clip, w, h));

g2.fillRect(0,0,w,h);

g2.dispose();

}

}

private GradientPaint getGradient(int index, Rectangle r, int w, int h) {

Color c1 = Color.blue;

Color c2 = Color.orange;

float x1 = (index%2 == 0) ? r.width : w-r.width;

float y1 = (index/2 == 1) ? h-r.height : r.height;

float x2 = (index%2 == 0) ? 0 : w;

float y2 = (index/2 == 1) ? h : 0;

return new GradientPaint(x1, y1, c1, x2, y2, c2);

}

public static void main(String[] args) {

JFrame f = new JFrame();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.getContentPane().add(new OverlappingImages());

f.pack();

f.setLocation(200,200);

f.setVisible(true);

}

}

crwooda at 2007-7-12 19:49:32 >