| /* |
| * Copyright (c) 1998, 2011, Oracle and/or its affiliates. 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. |
| * |
| * - Redistributions in binary form must reproduce 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 Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * This source code is provided to illustrate the usage of a given feature |
| * or technique and has been deliberately simplified. Additional steps |
| * required for a production-quality application, such as security checks, |
| * input validation and proper error handling, might not be present in |
| * this sample code. |
| */ |
| |
| |
| |
| import javax.swing.*; |
| import javax.swing.filechooser.*; |
| import java.io.File; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| |
| /** |
| * A convenience implementation of the FileView interface that |
| * manages name, icon, traversable, and file type information. |
| * |
| * This implementation 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); |
| * |
| * @author Jeff Dinkins |
| */ |
| public class ExampleFileView extends FileView { |
| |
| private final Map<String, Icon> icons = new HashMap<String, Icon>(); |
| private final Map<File, String> fileDescriptions = |
| new HashMap<File, String>(); |
| private final Map<String, String> typeDescriptions = |
| new HashMap<String, String>(); |
| |
| /** |
| * The name of the file. Do nothing special here. Let |
| * the system file view handle this. |
| * @see FileView#getName |
| */ |
| @Override |
| public String getName(File f) { |
| return null; |
| } |
| |
| /** |
| * Adds a human readable description of the file. |
| */ |
| public void putDescription(File f, String fileDescription) { |
| fileDescriptions.put(f, fileDescription); |
| } |
| |
| /** |
| * A human readable description of the file. |
| * |
| * @see FileView#getDescription |
| */ |
| @Override |
| public String getDescription(File f) { |
| return 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(extension, typeDescription); |
| } |
| |
| /** |
| * 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 |
| */ |
| @Override |
| public String getTypeDescription(File f) { |
| return typeDescriptions.get(getExtension(f)); |
| } |
| |
| /** |
| * Convenience method that returns the "dot" extension for the |
| * given file. |
| */ |
| private 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 |
| */ |
| @Override |
| public Icon getIcon(File f) { |
| Icon icon = null; |
| String extension = getExtension(f); |
| if (extension != null) { |
| icon = icons.get(extension); |
| } |
| return icon; |
| } |
| |
| /** |
| * 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 directory 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 |
| */ |
| @Override |
| public Boolean isTraversable(File f) { |
| // if (some_reason) { |
| // return Boolean.FALSE; |
| // } |
| return null; // Use default from FileSystemView |
| } |
| } |