* @throws IOException if there is an I/O error.
*/
public void doSaveAs() throws IOException {
JFileChooser fileChooser = new JFileChooser();
ExtensionFileFilter filter = new ExtensionFileFilter(
localizationResources.getString("PNG_Image_Files"), ".png"
);
fileChooser.addChoosableFileFilter(filter);
int option = fileChooser.showSaveDialog(this);