ImageProcessorpublic class ImageProcessor extends JComponent
| Fields Summary |
|---|
| private BufferedImage | source | | private BufferedImage | destination | | private JComboBox | options |
| Constructors Summary |
|---|
public ImageProcessor(BufferedImage image)
source = destination = image;
setBackground(Color.white);
setLayout(new BorderLayout());
// create a panel to hold the combo box
JPanel controls = new JPanel();
// create the combo box with the names of the area operators
options = new JComboBox(
new String[] { "[source]", "brighten", "darken", "rotate", "scale" }
);
// perform some processing when the selection changes
options.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent ie) {
// retrieve the selection option from the combo box
String option = (String)options.getSelectedItem();
// process the image according to the selected option
BufferedImageOp op = null;
if (option.equals("[source]"))
destination = source;
else if (option.equals("brighten"))
op = new RescaleOp(1.5f, 0, null);
else if (option.equals("darken"))
op = new RescaleOp(.5f, 0, null);
else if (option.equals("rotate"))
op = new AffineTransformOp(
AffineTransform.getRotateInstance(Math.PI / 6), null);
else if (option.equals("scale"))
op = new AffineTransformOp(
AffineTransform.getScaleInstance(.5, .5), null);
if (op != null) destination = op.filter(source, null);
repaint();
}
});
controls.add(options);
add(controls, BorderLayout.SOUTH);
|
| Methods Summary |
|---|
| public static void | main(java.lang.String[] args)
String filename = args[0];
ImageIcon icon = new ImageIcon(filename);
Image i = icon.getImage();
// draw the Image into a BufferedImage
int w = i.getWidth(null), h = i.getHeight(null);
BufferedImage buffImage = new BufferedImage(w, h,
BufferedImage.TYPE_INT_RGB);
Graphics2D imageGraphics = buffImage.createGraphics();
imageGraphics.drawImage(i, 0, 0, null);
JFrame frame = new JFrame("ImageProcessor");
frame.getContentPane().add(new ImageProcessor(buffImage));
frame.setSize(buffImage.getWidth(), buffImage.getHeight());
frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
frame.setVisible(true);
| | public void | paintComponent(java.awt.Graphics g)
int imageWidth = destination.getWidth();
int imageHeight = destination.getHeight();
int width = getSize().width;
int height = getSize().height;
g.drawImage(destination,
(width - imageWidth) / 2, (height - imageHeight) / 2, null);
|
|
