JOptionPane.showMessageDialog(this,
I18n.msg("select_room_first"));
} else {
final JFileChooser fc = new JFileChooser(Info.getDatafilePath() + "/resources/");
OpenDialogFileFilter filter = new OpenDialogFileFilter();
filter.addExtension("png");
filter.addExtension("jpeg");
filter.addExtension("jpg");
filter.setDescription("Image files (png, jpeg)");
fc.addChoosableFileFilter(filter);
fc.setFileFilter(filter);