imagefilefilter.java

具有不同语法高亮的编辑器实例

/*
 * 11/14/2003
 *
 * ImageFileFilter - A FileFilter that filters everything except image files
 *                   processed by Swing (*.jpg, *.gif and *.png).
 * Copyright (C) 2003 Robert Futrell
 * [e-mail]
 * www.website.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.fife.ui.rtextfilechooser.filters;

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


/**
 * A file filter for <code>JFileChooser</code>s that filters everything except
 * image files processed by Swing (<code>*.gif</code>, <code>*.jpg</code>, and
 * <code>*.png</code>).
 *
 * @author Robert Futrell
 * @version 1.0
 */
public class ImageFileFilter extends FileFilter {


/*****************************************************************************/


    /**
     * Accepts all gif, jpg, and png image files.
     *
     * @param f The file to check.
     * @return Whether the file is an image file.
     */
    public boolean accept(File f) {

	  // Accept the "file" if it is a directory.
        if (f.isDirectory()) {
            return true;
        }

        // Get the extension of the file.
	  String extension = null;
	  String s = f.getName();
	  int i = s.lastIndexOf('.');
	  if (i>0 && i<s.length()-1)
	  	extension = s.substring(i+1).toLowerCase();

        if (extension!=null &&
            (extension.equals("gif") || extension.equals("jpg") ||
             extension.equals("png")))
        	return true;

	  // Any other files are not accepted by this filter.
        return false;

    }


/*****************************************************************************/


    /**
     * Returns the description of this file filter.
     *
     * @return The description.
     */
    public String getDescription() {
        return "Supported Image Formats (*.gif, *.jpg)";
    }


/*****************************************************************************/

}