case "$choice" in
        '1'*)
        ;;
        '2'*)
        ;;
        '3'*) exit ;
        '4'*) if [[ $directory ]];
            then
                7z x $filename -o$directory
                draw_unpackSuccess
                directory=
                filename=
            else
                7z x $filename
                draw_unpackSuccess
                directory=
                filename=
            fi
        ;;
        *) echo "Unknown option: $choice";;
    esac