Re: Work around requested

On 12/21/2011 1:58 PM, bH wrote:


import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import java.io.*;
import java.net.*;
import javax.imageio.*;
import javax.swing.*;

public class test extends JPanel implements ActionListener {
      private final JFrame frame;
      private final RenderingHints hints;
      private BufferedImage image,thumb1,thumb2;

      public test(JFrame frame) {
          this.frame = frame;

          hints = new RenderingHints(
           RenderingHints.KEY_INTERPOLATION,
           RenderingHints.VALUE_INTERPOLATION_BICUBIC);
          hints.add(new RenderingHints(
           RenderingHints.KEY_ALPHA_INTERPOLATION,
           RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY));
          hints.add(new RenderingHints(
           RenderingHints.KEY_COLOR_RENDERING,
           RenderingHints.VALUE_COLOR_RENDER_QUALITY));

          try {
              URL url =
               new URL("http://rabbitbrush.frazmtn.com/saturn.jpg");
              image = ImageIO.read(url);
              setPreferredSize(
               new Dimension(image.getWidth(),image.getHeight()));

              thumb1 = scaleImage(image,.25,.25,
               AffineTransformOp.TYPE_BICUBIC);
              thumb2 = scaleImage(image,.25,.25,hints);

              // if the image needs to have the colorspace converted
              // image = convertToCompatible(image);
          } catch (MalformedURLException murle) {
              JOptionPane.showMessageDialog(this,murle);
          } catch (IOException ioe) {
              JOptionPane.showMessageDialog(this,ioe);
          }
      }

      public void actionPerformed(ActionEvent ae) {
          String ac = ae.getActionCommand();
          if (ac.equals("url")) {
              String input =
               JOptionPane.showInputDialog(this,"Enter Image URL");
              if (!input.equals("")) {
                  try {
                      URL url = new URL(input);
                      image = ImageIO.read(url);
                      setPreferredSize(
                       new Dimension(image.getWidth(),image.getHeight()));

                      thumb1 = scaleImage(image,.25,.25,
                       AffineTransformOp.TYPE_BICUBIC);
                      thumb2 = scaleImage(image,.25,.25,hints);

                      setPreferredSize(new Dimension(image.getWidth(),
                       image.getHeight()));
                      frame.pack();
                      repaint();
                  } catch (MalformedURLException murle) {
                      JOptionPane.showMessageDialog(this,murle);
                  } catch (IOException ioe) {
                      JOptionPane.showMessageDialog(this,ioe);
                  }
              }
          }
      }

      public void paintComponent(Graphics g) {
          g.drawImage(image,0,0,null);
          g.drawImage(thumb1,0,0,null);
          g.drawImage(thumb2,getWidth()-thumb2.getWidth(),0,null);
      }

      public static BufferedImage scaleImage(BufferedImage src, double sx,
       double sy, int interpolationType) {
          AffineTransformOp op = new AffineTransformOp(
           AffineTransform.getScaleInstance(sx,sy),interpolationType);
          return op.filter(src,null);
      }

      public static BufferedImage scaleImage(BufferedImage src, double sx,
       double sy, RenderingHints hints) {
          AffineTransformOp op = new AffineTransformOp(
           AffineTransform.getScaleInstance(sx,sy),hints);
          return op.filter(src,null);
      }

      public static BufferedImage convertToCompatible(BufferedImage image) {
          GraphicsEnvironment ge =
           GraphicsEnvironment.getLocalGraphicsEnvironment();
          GraphicsDevice gd = ge.getDefaultScreenDevice();
          GraphicsConfiguration gc = gd.getDefaultConfiguration();

          BufferedImage compatible =
gc.createCompatibleImage(image.getWidth(),
           image.getHeight());

          if (compatible.getType() == image.getType())
              return image;

          ColorConvertOp op = new ColorConvertOp(
           image.getColorModel().getColorSpace(),
           compatible.getColorModel().getColorSpace(),null);

          return op.filter(image,compatible);
      }

      public static void main(String[] args) {
          EventQueue.invokeLater(new Runnable() {
              public void run() {
                  JFrame f = new JFrame();
                  f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

                  test t = new test(f);

                  JMenuBar mb = new JMenuBar();
                  f.setJMenuBar(mb);
                  JMenu file = new JMenu("file");
                  mb.add(file);
                  JMenuItem url = new JMenuItem("url");
                  url.addActionListener(t);
                  file.add(url);

                  f.add(t);
                  f.pack();
                  f.setVisible(true);
              }
          });
      }

}

--

Knute Johnson