| 0,0 → 1,144 |
|---|
| package ak.resizeapplet; |
| |
| import javax.swing.*; |
| import java.awt.*; |
| import java.awt.event.*; |
| import java.awt.image.*; |
| import java.util.*; |
| import java.io.*; |
| |
| public class ResizeApplet extends JApplet |
| { |
| private final static int thumbnailWidth = 200; |
| private final static int thumbnailHeight = 150; |
| |
| private JLabel fileLabel; |
| private JTextField fileField; |
| private JButton browseButton; |
| private JButton loadButton; |
| private JLabel imagePanel; |
| |
| private ImageResizer resizer = new JiuResizer(); |
| private ImageIcon thumbnail = new ImageIcon(); |
| |
| private void createGUI() |
| { |
| setLayout(new GridBagLayout()); |
| GridBagConstraints c = new GridBagConstraints(); |
| |
| fileLabel = new JLabel("File"); |
| fileLabel.setDisplayedMnemonic('f'); |
| c.gridx = 0; c.gridy = 0; c.weightx = 0.0; c.weighty = 0.0; c.fill = GridBagConstraints.NONE; |
| add(fileLabel, c); |
| |
| fileField = new JTextField(); |
| c.gridx = 1; c.gridy = 0; c.weightx = 0.7; c.weighty = 0.0; c.fill = GridBagConstraints.HORIZONTAL; |
| add(fileField, c); |
| fileLabel.setLabelFor(fileField); |
| |
| browseButton = new JButton("Browse"); |
| browseButton.setMnemonic('b'); |
| browseButton.addActionListener(new ActionListener() { |
| public void actionPerformed(ActionEvent e) { |
| browseButtonClicked(); |
| } |
| } ); |
| c.gridx = 2; c.gridy = 0; c.weightx = 0.1; c.weighty = 0.0; c.fill = GridBagConstraints.HORIZONTAL; |
| add(browseButton, c); |
| |
| loadButton = new JButton("Load"); |
| loadButton.setMnemonic('l'); |
| loadButton.addActionListener(new ActionListener() { |
| public void actionPerformed(ActionEvent e) { |
| loadButtonClicked(); |
| } |
| } ); |
| c.gridx = 3; c.gridy = 0; c.weightx = 0.1; c.weighty = 0.0; c.fill = GridBagConstraints.HORIZONTAL; |
| add(loadButton, c); |
| |
| imagePanel = new JLabel(); |
| imagePanel.setBorder(BorderFactory.createLineBorder(Color.black)); |
| imagePanel.setMinimumSize(new Dimension(thumbnailWidth, thumbnailHeight)); |
| imagePanel.setPreferredSize(new Dimension(thumbnailWidth, thumbnailHeight)); |
| c.gridx = 0; c.gridy = 1; c.weightx = 0.0; c.weighty = 0.9; c.fill = GridBagConstraints.NONE; |
| c.gridwidth = 4; |
| add(imagePanel, c); |
| } |
| |
| public void init() |
| { |
| try { |
| createGUI(); |
| } |
| catch(Exception ex) { |
| System.err.println("Cannot create GUI: " + ex.getMessage()); |
| } |
| } |
| |
| private void browseButtonClicked() |
| { |
| try { |
| JFileChooser chooser = new JFileChooser(); |
| ExtFileFilter filter = new ExtFileFilter("Images"); |
| |
| filter.addExtension("jpg"); |
| filter.addExtension("jpeg"); |
| filter.addExtension("gif"); |
| chooser.setFileFilter(filter); |
| |
| chooser.setSelectedFile(new File(fileField.getText())); |
| if(chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) { |
| fileField.setText(chooser.getSelectedFile().getAbsolutePath()); |
| loadButtonClicked(); |
| } |
| } |
| catch(Exception ex) { |
| JOptionPane.showMessageDialog(this, "Cannot browse files: " + ex.getMessage(), |
| "ResizeApplet", JOptionPane.ERROR_MESSAGE); |
| } |
| } |
| |
| private void loadButtonClicked() |
| { |
| try { |
| thumbnail.setImage( |
| resizer.resize(loadImage(fileField.getText()), thumbnailWidth, thumbnailHeight)); |
| imagePanel.setIcon(thumbnail); |
| } |
| catch(Exception ex) { |
| JOptionPane.showMessageDialog(this, "Cannot browse files: " + ex.getMessage(), |
| "ResizeApplet", JOptionPane.ERROR_MESSAGE); |
| } |
| } |
| |
| private void sendToServer() |
| { |
| //javax.imageio.ImageIO.write(thumbnail.getImage(), "jpg", outputStream); |
| } |
| |
| protected Image loadImage(String fileName) |
| throws Exception |
| { |
| Toolkit toolkit = Toolkit.getDefaultToolkit(); |
| Image image = toolkit.createImage(fileName); |
| |
| toolkit.prepareImage(image, -1, -1, null); |
| |
| while(true) { |
| int status = toolkit.checkImage(image, -1, -1, null); |
| |
| if((status & ImageObserver.ALLBITS) != 0) break; |
| if((status & ImageObserver.ERROR) != 0) throw new Exception("Cannot read the image"); |
| |
| try { |
| Thread.sleep(100); |
| } |
| catch(Exception ex) { |
| throw new Exception("Cannot read the image"); |
| } |
| } |
| |
| return image; |
| } |
| } |
| |