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import java.io.File;
import java.io.IOException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class ImageViewer
{
public static void main(String[] args) throws IOException
{
File file = new File("pgh_640x480.jpg");
BufferedImage originalImage = ImageIO.read(file);
int width = originalImage.getWidth();
int height = originalImage.getHeight();
final SimpleRGB[] rgb = new SimpleRGB[5];
rgb[0] = new SimpleRGB(width, height);
for(int i = 0; i < height; i++)
{
for(int j = 0; j < width; j++)
{
Color c = new Color(originalImage.getRGB(j,i));
rgb[0].setRed(j, i, c.getRed());
rgb[0].setGreen(j, i, c.getGreen());
rgb[0].setBlue(j, i, c.getBlue());
}
}
rgb[1] = rgb[0].getRedImage();
rgb[2] = rgb[0].getGreenImage();
rgb[3] = rgb[0].getBlueImage();
rgb[4] = rgb[0].getGreyImage();
final RGBComponent rgbc = new RGBComponent(rgb[0]);
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(1,5));
JButton[] button = new JButton[5];
button[0] = new JButton("RGB");
button[1] = new JButton("Red");
button[2] = new JButton("Green");
button[3] = new JButton("Blue");
button[4] = new JButton("Greyscale");
class colorButtonListener implements ActionListener
{
private int index;
public colorButtonListener(int anIndex)
{
index = anIndex;
}
public void actionPerformed(ActionEvent arg0)
{
rgbc.setImage(rgb[index]);
}
}
ActionListener[] cbl = new colorButtonListener[5];
for(int i = 0; i < 5; i++)
{
cbl[i] = new colorButtonListener(i);
button[i].addActionListener(cbl[i]);
buttonPanel.add(button[i]);
}
JFrame frame = new JFrame("Image Viewer");
frame.setSize(642,534);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(rgbc);
frame.add(buttonPanel, BorderLayout.SOUTH);
frame.setVisible(true);
}
}
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