FileChooser.java :  » IDE » DrJava » edu » rice » cs » util » swing » Java Open Source

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package edu.rice.cs.util.swing;

import edu.rice.cs.plt.io.IOUtil;

import java.io.File;

import javax.swing.JFileChooser;

public class FileChooser extends JFileChooser {
  
  /** File system root for chooser */
  protected File _root;
  
  /** Creates a FileChooser with the given root, allowing only a single selection WITHIN the specified file system
    * @param root the root directory to display in the tree
    */
  public FileChooser(File root) { 
    super(root);
    _init(root);
  }
  
  /*---------- INITIALIZATION METHODS ----------*/
  
  /** Sets up the GUI components of the dialog */
  private void _init(final File root) {
    
    setRoot(root);
    
    setFileSelectionMode(FILES_ONLY);
    setDialogType(CUSTOM_DIALOG);
    setApproveButtonText("Select");
  }
  
  public void setRoot(File root) {
    _root = root; // may be null
    if (root != null) {
      if (! root.exists()) _root = null;
      else if (! root.isDirectory()) _root = root.getParentFile();
    }
  }
  
  public File getRoot() { return _root; }
  
  public boolean isTraversable(File f) {
    if (_root == null) return super.isTraversable(f);
//    Utilities.show("isTraversable(" + f + ") called; _root = " + _root);
    return f != null && f.isDirectory() && IOUtil.isMember(f, _root);
  }
}