Customizing a JFileChooser : File Chooser « Swing JFC « Java

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Java » Swing JFC » File ChooserScreenshots 
Customizing a JFileChooser
Customizing a JFileChooser
     
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.util.HashMap;

import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileView;

public class EnhancedFileTester extends JPanel {
  class AnOvalIcon implements Icon {
    Color color;

    public AnOvalIcon(Color c) {
      color = c;
    }

    public void paintIcon(Component c, Graphics g, int x, int y) {
      g.setColor(color);
      g.fillOval(x, y, getIconWidth(), getIconHeight());
    }

    public int getIconWidth() {
      return 10;
    }

    public int getIconHeight() {
      return 15;
    }
  }

  public class IconView extends FileView {
    private HashMap hash = new HashMap();

    public IconView() {
      hash.put("htm"new AnOvalIcon(Color.RED));
      hash.put("html"new AnOvalIcon(Color.GREEN));
      hash.put("java"new AnOvalIcon(Color.BLUE));
    }

    public String getName(File f) {
      String s = f.getName();
      if (s.length() == 0) {
        s = f.getAbsolutePath();
      }
      return s;
    }

    public String getDescription(File f) {
      return f.getName();
    }

    public String getTypeDescription(File f) {
      return f.getAbsolutePath();
    }

    public Icon getIcon(File f) {
      String path = f.getAbsolutePath();
      int pos = path.lastIndexOf('.');
      if ((pos >= 0&& (pos < (path.length() 1))) {
        String ext = path.substring(pos + 1).toLowerCase();
        return (Iconhash.get(ext);
      }
      return null;
    }

    public Boolean isTraversable(File file) {
      return (new Boolean(file.isDirectory()));
    }
  }

  public class ExtensionFilter extends FileFilter {
    private String extensions[];

    private String description;

    public ExtensionFilter(String description, String extension) {
      this(description, new String[] { extension });
    }

    public ExtensionFilter(String description, String extensions[]) {
      this.description = description;
      this.extensions = (String[]) extensions.clone();
    }

    public boolean accept(File file) {
      if (file.isDirectory()) {
        return true;
      }
      int count = extensions.length;
      String path = file.getAbsolutePath();
      for (int i = 0; i < count; i++) {
        String ext = extensions[i];
        if (path.endsWith(ext)
            && (path.charAt(path.length() - ext.length()) == '.')) {
          return true;
        }
      }
      return false;
    }

    public String getDescription() {
      return (description == null ? extensions[0: description);
    }
  }

  public EnhancedFileTester() {
    JButton jb = new JButton("Open File Viewer");
    add(jb);
    ActionListener listener = new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        JFileChooser chooser = new JFileChooser(".");
        FileFilter type1 = new ExtensionFilter("Java source"".java");
        FileFilter type2 = new ExtensionFilter("Image files",
            new String[] { ".jpg"".gif""jpeg""xbm" });
        FileFilter type3 = new ExtensionFilter("HTML files",
            new String[] { ".htm"".html" });
        chooser.addChoosableFileFilter(type1);
        chooser.addChoosableFileFilter(type2);
        chooser.addChoosableFileFilter(type3);
        chooser.setFileFilter(type2)// Initial filter setting
        FileView view = new IconView();
        chooser.setFileView(view);
        int status = chooser.showOpenDialog(EnhancedFileTester.this);
        if (status == JFileChooser.APPROVE_OPTION) {
          File f = chooser.getSelectedFile();
          System.out.println(f);
        }
      }
    };
    jb.addActionListener(listener);
  }

  public static void main(String args[]) {
    JFrame f = new JFrame("Enhanced File Example");
    JPanel j = new EnhancedFileTester();
    f.getContentPane().add(j, BorderLayout.CENTER);
    f.setSize(300200);
    f.show();
  }
}
           
         
    
    
    
    
  
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17.Listening for Approve and Cancel Events in a JFileChooser Dialog
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20.JDialog javax.swing.JFileChooser.createDialog(Component parent)
21.void javax.swing.JFileChooser.setDialogType(int dialogType)
22.Changing the Text of the Approve Button in a JFileChooser Dialog
23.Determining If a File Is Hidden
24.Showing Hidden Files in a JFileChooser Dialog
25.Enabling Multiple Selections in a JFileChooser Dialog
26.Listening for Changes to the Selected File in a JFileChooser Dialog
27.Getting the File-Type Name of a File
28.Getting and Setting the Selected File of a JFileChooser Dialog
29.Getting and Setting the Current Directory of a JFileChooser Dialog
30.Determining If the Approve or Cancel Button Was Clicked in a JFileChooser Dialog
31.Adding a Filter to a File Chooser Dialog
32.Displaying Only Directories in a File Chooser Dialog
33.Creating a JFileChooser Dialog
34.Localize a JFileChooser
35.Select a directory with a JFileChooser
36.Disable the JFileChooser's "New folder" button
37.Validate a filename from a JFileChooser
38.extends FileView to create custom File chooser
39.Suffix FileFilter
40.Extension File Filter
41.Files filter that filters files by their suffix (or extension)
42.Generic File Filter
43.Get Directory Choice
44.Get File Choice
45.A file view that displays an icon for all files that match a file filterA file view that displays an icon for all files that match a file filter
46.Dir File Filter extends javax.swing.filechooser.FileFilter
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