Application: gvSIG desktop

package com.iver.andami.iconthemes;

import java.io.File;

import java.io.FilenameFilter;

import java.net.MalformedURLException;

import java.net.URL;

import javax.swing.ImageIcon;

/**

 * This class extends AbstractIconTheme and implements the abstract methods of this

 * class. This methods are <code>loadIcon</code> and <code>load</code>. This methods

 * allows load one icon or all icons in the resource.

 */

public class IconThemeDir extends AbstractIconTheme{

        /**

         * Constructor.Constructs an Icon Theme with a default one.

         * @param def. The default icon theme

         */

        public IconThemeDir(IIconTheme def) {

                setDefault(def);

        }

        /**

         * Allows load a icon when this is inside in a directoyr. IconName is the name or

         * key of the icon and "resource" is the URL or the icon

         */

        // @Override

        protected ImageIcon loadIcon(String iconName,Object resource) {

                if (resource instanceof URL) {

                        // ok, we got an imagePath, let's see if it's valid

                        ImageIcon icon =  new ImageIcon((URL)resource);

                        if (icon.getImage()!=null) {

                                // the icon was successfully created from the imagePath

                                return icon;

                        }

                        else {

                                log().error("Registered icon does not map to a valid image -- key: "+iconName+" -- URL: "+resource.toString());

                                return null;

                        }

                } else if (resource instanceof ImageIcon) {

                        return (ImageIcon)resource;

                }

                return null;

        }

        /**

         * Allows to load all icons in the directory.

         */

        // @Override

        public void load() {

                if (getResource() instanceof File) {

                        File basedir = (File) getResource();

                        if (basedir.isDirectory()) {

                                File[] imageList = basedir.listFiles(new ImageFileFilter());

                                String name;

                                for (int i=imageList.length-1; i>=0; i--) {

                                        name = computeKey(imageList[i].getName());

                                        try {

                                                register(name, imageList[i].toURL());

                                        } catch (MalformedURLException e) {}

                                }

                        }

                }

        }

        /**

         * This class allows filter the images in the directory. Allows to load the images

         * with a apropiate extension.

         */

        class ImageFileFilter implements FilenameFilter {

                public boolean accept(File dir, String fileName) {

                        String extension = "";

                        int pointPos = fileName.lastIndexOf(".");

                        if (pointPos>0 && pointPos < (fileName.length()-1) )

                                extension = fileName.substring(pointPos+1).toLowerCase();

                        if ( extension.equals("jpg") || extension.equals("jpeg")

                                        || extension.equals("png")

                                        || extension.equals("gif")

                                        )

                                return true;

                        else

                                return false;

                }

        }

        /**

         * Returns the key of the image without extension

         * @param fileName

         * @return string

         */

        private String computeKey(String fileName) {

                int pointPos = fileName.lastIndexOf(".");

                if (pointPos!=-1)

                        return fileName.substring(0, pointPos);

                else

                        return fileName;

        }

}