Added support for reloading the cache, refactored some names.

com/gallery/GalleryRemote/ThumbnailCache.java

@@ -61,6 +61,7 @@ public ThumbnailCache( MainFrame mf ) {
 	 *  Main processing method for the ThumbnailLoader object
 	 */
 	public void run() {
+		Thread.yield();
 		int loaded = 0;
 		int pId = mf.startProgress(0, toLoad.size(), "Loading thumbnails", false);
 		//Log.log(Log.TRACE, MODULE, "Starting " + iFilename);
@@ -111,7 +112,7 @@ public void preloadThumbnail( String filename ) {
 	 *@param  filename  path to the file
 	 */
 	public void preloadThumbnailFirst( String filename ) {
-		Log.log(Log.TRACE, MODULE, "preloadThumbnail " + filename);
+		Log.log(Log.TRACE, MODULE, "preloadThumbnailFirst " + filename);
 
 		if (!thumbnails.containsKey(filename)) {
 			toLoad.push( filename );
@@ -124,7 +125,7 @@ public void preloadThumbnailFirst( String filename ) {
 	/**
 	 *  Ask for several thumnails to be loaded
 	 *
-	 *@param  files  enumeration of File objects that should be loaded
+	 *@param  files  enumeration of Picture objects that should be loaded
 	 */
 	public void preloadThumbnailFiles( Enumeration files ) {
 		Log.log(Log.TRACE, MODULE, "preloadThumbnail " + files);
@@ -146,18 +147,44 @@ public void preloadThumbnailFiles( Enumeration files ) {
 	 *
 	 *@param  filenames  an array of File objects
 	 */
-	public void preloadThumbnails( File[] filenames ) {
-		Log.log(Log.TRACE, MODULE, "preloadThumbnail " + filenames);
+	public void preloadThumbnailFiles( File[] files ) {
+		Log.log(Log.TRACE, MODULE, "preloadThumbnailFiles " + files);
+
+		for ( int i = 0; i < files.length; i++ ) {
+			String filename = files[i].getPath();
+
+			if (!thumbnails.containsKey(filename)) {
+				toLoad.add( 0, filename );
+			}
+		}
+
+		rerun();
+	}
+
+	/**
+	 * Ask for an enumeration fo file names to be loaded
+	 *
+	 * @param filenames an enumeration of String file names
+	 */
+	public void preloadThumbnails( Enumeration filenames ) {
+		Log.log(Log.TRACE, MODULE, "preloadThumbnails " + filenames);
 
-		for ( int i = 0; i < filenames.length; i++ ) {
-			if (!thumbnails.containsKey(filenames[i])) {
-				toLoad.add( 0, ( (File) filenames[i] ).getPath() );
+		while ( filenames.hasMoreElements() ) {
+			String filename = (String) filenames.nextElement();
+			if (!thumbnails.containsKey(filename)) {
+				toLoad.add( 0, filename );
 			}
 		}
 
 		rerun();
 	}
 
+	public void reload() {
+		Enumeration e = ((Hashtable) thumbnails.clone()).keys();
+		thumbnails.clear();
+		preloadThumbnails(e);
+	}
+
 
 	void rerun() {
 		if ( !stillRunning && GalleryRemote.getInstance().properties.getShowThumbnails() ) {