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Java Source | 2002-09-06 | 6.4 KB | 201 lines |
- /*
- * Copyright (c) 2002 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * -Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * -Redistribution in binary form must reproduct the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the distribution.
- *
- * Neither the name of Sun Microsystems, Inc. or the names of contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
- * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
- * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT
- * BE LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
- * OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THE SOFTWARE OR ITS
- * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
- * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
- * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
- * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN
- * IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- *
- * You acknowledge that Software is not designed, licensed or intended for
- * use in the design, construction, operation or maintenance of any nuclear
- * facility.
- */
-
- /*
- * @(#)ExampleFileView.java 1.12 02/06/13
- */
-
- import javax.swing.*;
- import javax.swing.filechooser.*;
-
- import java.io.File;
- import java.util.Hashtable;
-
- /**
- * A convenience implementation of the FileView interface that
- * manages name, icon, traversable, and file type information.
- *
- * This this implemention will work well with file systems that use
- * "dot" extensions to indicate file type. For example: "picture.gif"
- * as a gif image.
- *
- * If the java.io.File ever contains some of this information, such as
- * file type, icon, and hidden file inforation, this implementation may
- * become obsolete. At minimum, it should be rewritten at that time to
- * use any new type information provided by java.io.File
- *
- * Example:
- * JFileChooser chooser = new JFileChooser();
- * fileView = new ExampleFileView();
- * fileView.putIcon("jpg", new ImageIcon("images/jpgIcon.jpg"));
- * fileView.putIcon("gif", new ImageIcon("images/gifIcon.gif"));
- * chooser.setFileView(fileView);
- *
- * @version 1.12 06/13/02
- * @author Jeff Dinkins
- */
- public class ExampleFileView extends FileView {
- private Hashtable icons = new Hashtable(5);
- private Hashtable fileDescriptions = new Hashtable(5);
- private Hashtable typeDescriptions = new Hashtable(5);
-
- /**
- * The name of the file. Do nothing special here. Let
- * the system file view handle this.
- * @see #setName
- * @see FileView#getName
- */
- public String getName(File f) {
- return null;
- }
-
- /**
- * Adds a human readable description of the file.
- */
- public void putDescription(File f, String fileDescription) {
- fileDescriptions.put(fileDescription, f);
- }
-
- /**
- * A human readable description of the file.
- *
- * @see FileView#getDescription
- */
- public String getDescription(File f) {
- return (String) fileDescriptions.get(f);
- };
-
- /**
- * Adds a human readable type description for files. Based on "dot"
- * extension strings, e.g: ".gif". Case is ignored.
- */
- public void putTypeDescription(String extension, String typeDescription) {
- typeDescriptions.put(typeDescription, extension);
- }
-
- /**
- * Adds a human readable type description for files of the type of
- * the passed in file. Based on "dot" extension strings, e.g: ".gif".
- * Case is ignored.
- */
- public void putTypeDescription(File f, String typeDescription) {
- putTypeDescription(getExtension(f), typeDescription);
- }
-
- /**
- * A human readable description of the type of the file.
- *
- * @see FileView#getTypeDescription
- */
- public String getTypeDescription(File f) {
- return (String) typeDescriptions.get(getExtension(f));
- }
-
- /**
- * Conveinience method that returnsa the "dot" extension for the
- * given file.
- */
- public String getExtension(File f) {
- String name = f.getName();
- if(name != null) {
- int extensionIndex = name.lastIndexOf('.');
- if(extensionIndex < 0) {
- return null;
- }
- return name.substring(extensionIndex+1).toLowerCase();
- }
- return null;
- }
-
- /**
- * Adds an icon based on the file type "dot" extension
- * string, e.g: ".gif". Case is ignored.
- */
- public void putIcon(String extension, Icon icon) {
- icons.put(extension, icon);
- }
-
- /**
- * Icon that reperesents this file. Default implementation returns
- * null. You might want to override this to return something more
- * interesting.
- *
- * @see FileView#getIcon
- */
- public Icon getIcon(File f) {
- Icon icon = null;
- String extension = getExtension(f);
- if(extension != null) {
- icon = (Icon) icons.get(extension);
- }
- return icon;
- }
-
- /**
- * Whether the file is hidden or not. This implementation returns
- * true if the filename starts with a "."
- *
- * @see FileView#isHidden
- */
- public Boolean isHidden(File f) {
- String name = f.getName();
- if(name != null && !name.equals("") && name.charAt(0) == '.') {
- return Boolean.TRUE;
- } else {
- return Boolean.FALSE;
- }
- };
-
- /**
- * Whether the directory is traversable or not. Generic implementation
- * returns true for all directories and special folders.
- *
- * You might want to subtype ExampleFileView to do somethimg more interesting,
- * such as recognize compound documents directories; in such a case you might
- * return a special icon for the diretory that makes it look like a regular
- * document, and return false for isTraversable to not allow users to
- * descend into the directory.
- *
- * @see FileView#isTraversable
- */
- public Boolean isTraversable(File f) {
- // if (some_reason) {
- // return Boolean.FALSE;
- // }
- return null; // Use default from FileSystemView
- };
-
- }
-