gcc/libjava/javax/swing/plaf/FileChooserUI.java

/* FileChooserUI.java --
   Copyright (C) 2002, 2003 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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02111-1307 USA.

Linking this library statically or dynamically with other modules is
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permission to link this library with independent modules to produce an
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package javax.swing.plaf;

import java.io.File;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileView;

/**
 * An abstract base class for delegates that implement the pluggable
 * look and feel for a <code>JFileChooser</code>.
 *
 * @see javax.swing.JFileChooser
 *
 * @author Andrew Selkirk (aselkirk@sympatico.ca)
 * @author Sascha Brawer (brawer@dandelis.ch)
 */
public abstract class FileChooserUI
  extends ComponentUI
{
  /**
   * Constructs a new <code>FileChooserUI</code>.
   */
  public FileChooserUI()
  {
  }

  
  /**
   * Returns a <code>FileFilter</code> that accepts every file.  While
   * the filtering itself is not specific to any look and feel, the
   * text returned by <code>FileFilter.getDescription()</code> need
   * not be the same across all look and feels.
   *
   * @param chooser the <code>JFileChooser</code> for which
   *        a <code>FileFilter</code> is requested.
   *
   * @see javax.swing.JFileChooser#getAcceptAllFileFilter
   * @see javax.swing.filechooser.FileFilter#getDescription
   */
  public abstract FileFilter getAcceptAllFileFilter(JFileChooser chooser);


  /**
   * Returns a view to a file, which is able to retrieve its name,
   * icon, and other properties that are relevant for presenting
   * the file to the user.
   *
   * @param chooser the <code>JFileChooser</code> for which
   *        a <code>FileFilter</code> is requested.
   */
  public abstract FileView getFileView(JFileChooser chooser);


  /**
   * Determines which text is appropriate for the approve button
   * according to the design guidelines of the implemented
   * look and feel.
   *
   * @param chooser the <code>JFileChooser</code> whose
   *        button text is requested.
   *
   * @see javax.swing.JFileChoose#getApproveButtonText
   */
  public abstract String getApproveButtonText(JFileChooser chooser);


  /**
   * Determines which text is appropriate for the title bar of a
   * <code>JFileChooser</code> according to the design guidelines of
   * the implemented look and feel.
   *
   * @param chooser the <code>JFileChooser</code> whose
   *        dialog title is requested.
   *
   * @see javax.swing.JFileChoose#getDialogtitle
   */
  public abstract String getDialogTitle(JFileChooser chooser);


  /**
   * Refreshes the currently displayed directory.
   *
   * @param chooser the <code>JFileChooser</code> whose
   *        dialog title needs re-scanning.
   */
  public abstract void rescanCurrentDirectory(JFileChooser chooser);


  /**
   * Ensures that a specified file is visible in the
   * <code>JFileChooser</code>
   *
   * @param chooser the <code>JFileChooser</code> that
   *        should display the file <code>file</code>.
   *
   * @param file the file that needs to be made visible.
   */
  public abstract void ensureFileIsVisible(JFileChooser chooser, File file);
}