ImageProcessorpublic class ImageProcessor extends JComponent
| Fields Summary |
|---|
| private BufferedImage | source | | private BufferedImage | destination | | private JComboBox | options |
| Constructors Summary |
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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);
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| Methods Summary |
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| public static void | main(java.lang.String[] args)
String filename = args[0];
// load the image
Image i = Toolkit.getDefaultToolkit( ).getImage(filename);
Component c = new Component( ) {};
MediaTracker tracker = new MediaTracker(c);
tracker.addImage(i, 0);
try { tracker.waitForID(0); }
catch (InterruptedException ie) {}
// draw the Image into a BufferedImage
int w = i.getWidth(null), h = i.getHeight(null);
BufferedImage bi = new BufferedImage(w, h,
BufferedImage.TYPE_INT_RGB);
Graphics2D imageGraphics = bi.createGraphics( );
imageGraphics.drawImage(i, 0, 0, null);
// create a frame window
JFrame f = new JFrame("ImageProcessor");
f.addWindowListener(new WindowAdapter( ) {
public void windowClosing(WindowEvent e) { System.exit(0); }
});
Container content = f.getContentPane( );
content.setLayout(new BorderLayout( ));
content.add(new ImageProcessor(bi));
f.setSize(bi.getWidth(), bi.getHeight( ));
f.setLocation(100, 100);
f.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);
|
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