Programming non-sense #1

With this post, I want to start a small series about ABAP programs that doesn't bring any value but are fun to code -:) I believe that ABAP coding is fun...believe it or not...

Anyway...my first code, that by the way doesn't work in the best possible way, it's a clock...we simply read the system time and show it on digital form...then, we activate a temporizer that it's going to be executed every second and it's going to read again the system timeand show it on digital format...of course, as we don't have in ABAP and CLRSCR(); or an CLS, we must read every line and modify their contents.

DATA: temporizador TYPE REF TO cl_gui_timer,
      hour(2) TYPE c,
      minute(2) TYPE c,
      second(2) TYPE c,
      one(1) TYPE c,
      two(1) TYPE c,
      line1 TYPE string,
      line2 TYPE string,
      line3 TYPE string.

*----------------------------------------------------------------------*
*       CLASS clock DEFINITION                                         *
*----------------------------------------------------------------------*
CLASS clock DEFINITION.
  PUBLIC SECTION.
    METHODS: zero IMPORTING line TYPE string,
             one IMPORTING line TYPE string,
             two IMPORTING line TYPE string,
             three IMPORTING line TYPE string,
             four IMPORTING line TYPE string,
             five IMPORTING line TYPE string,
             six IMPORTING line TYPE string,
             seven IMPORTING line TYPE string,
             eight IMPORTING line TYPE string,
             nine IMPORTING line TYPE string,
             periods IMPORTING line TYPE string,
             show IMPORTING number TYPE c.
ENDCLASS.                    "clock DEFINITION

*----------------------------------------------------------------------*
*       CLASS clock IMPLEMENTATION                                     *
*----------------------------------------------------------------------*
CLASS clock IMPLEMENTATION.
  METHOD zero.
    CASE line.
      WHEN 1.
        CONCATENATE line1 ' _ ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 '| |' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 '|_|' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "zero
  METHOD one.
    CASE line.
      WHEN 1.
        CONCATENATE line1 '  ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 ' |' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 ' |' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "one
  METHOD two.
    CASE line.
      WHEN 1.
        CONCATENATE line1 ' _ ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 ' _|' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 '|_ ' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "two
  METHOD three.
    CASE line.
      WHEN 1.
        CONCATENATE line1 ' _ ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 ' _|' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 ' _|' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "three
  METHOD four.
    CASE line.
      WHEN 1.
        CONCATENATE line1 '   ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 '|_|' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 '  |' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "four
  METHOD five.
    CASE line.
      WHEN 1.
        CONCATENATE line1 ' _ ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 '|_ ' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 ' _|' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "five
  METHOD six.
    CASE line.
      WHEN 1.
        CONCATENATE line1 ' _ ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 '|_ ' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 '|_|' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "six
  METHOD seven.
    CASE line.
      WHEN 1.
        CONCATENATE line1 '_  ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 ' | ' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 ' | ' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "seven
  METHOD eight.
    CASE line.
      WHEN 1.
        CONCATENATE line1 ' _ ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 '|_|' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 '|_|' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "eight
  METHOD nine.
    CASE line.
      WHEN 1.
        CONCATENATE line1 ' _ ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 '|_|' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 ' _|' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "nine
  METHOD periods.
    CASE line.
      WHEN 1.
        CONCATENATE line1 '   ' INTO line1 SEPARATED BY space RESPECTING BLANKS.
      WHEN 2.
        CONCATENATE line2 ' * ' INTO line2 SEPARATED BY space RESPECTING BLANKS.
      WHEN 3.
        CONCATENATE line3 ' * ' INTO line3 SEPARATED BY space RESPECTING BLANKS.
    ENDCASE.
  ENDMETHOD.                    "periods
  METHOD show.
    CASE number.
      WHEN 0.
        zero( EXPORTING line = '1' ).
        zero( EXPORTING line = '2' ).
        zero( EXPORTING line = '3' ).
      WHEN 1.
        one( EXPORTING line = '1' ).
        one( EXPORTING line = '2' ).
        one( EXPORTING line = '3' ).
      WHEN 2.
        two( EXPORTING line = '1' ).
        two( EXPORTING line = '2' ).
        two( EXPORTING line = '3' ).
      WHEN 3.
        three( EXPORTING line = '1' ).
        three( EXPORTING line = '2' ).
        three( EXPORTING line = '3' ).
      WHEN 4.
        four( EXPORTING line = '1' ).
        four( EXPORTING line = '2' ).
        four( EXPORTING line = '3' ).
      WHEN   5.
        five( EXPORTING line = '1' ).
        five( EXPORTING line = '2' ).
        five( EXPORTING line = '3' ).
      WHEN 6.
        six( EXPORTING line = '1' ).
        six( EXPORTING line = '2' ).
        six( EXPORTING line = '3' ).
      WHEN 7.
        seven( EXPORTING line = '1' ).
        seven( EXPORTING line = '2' ).
        seven( EXPORTING line = '3' ).
      WHEN 8.
        eight( EXPORTING line = '1' ).
        eight( EXPORTING line = '2' ).
        eight( EXPORTING line = '3' ).
      WHEN 9.
        nine( EXPORTING line = '1' ).
        nine( EXPORTING line = '2' ).
        nine( EXPORTING line = '3' ).
    ENDCASE.
  ENDMETHOD.                    "show
ENDCLASS.                    "clock IMPLEMENTATION

*----------------------------------------------------------------------*
*       CLASS lcl_event_handler DEFINITION                             *
*----------------------------------------------------------------------*
CLASS lcl_event_handler DEFINITION.
  PUBLIC SECTION.
    CLASS-METHODS: on_timer FOR EVENT finished OF cl_gui_timer
    IMPORTING sender.
ENDCLASS.                    "lcl_event_handler DEFINITION

*----------------------------------------------------------------------*
*       CLASS lcl_event_handler IMPLEMENTATION                         * 
*----------------------------------------------------------------------*
CLASS lcl_event_handler IMPLEMENTATION.
  METHOD on_timer.
    DATA: g_clock TYPE REF TO clock.

    IF NOT g_clock IS BOUND.
      CREATE OBJECT g_clock.
    ENDIF.

    CLEAR: line1, line2, line3.

    hour = sy-uzeit+0(2).
    one = hour+0(1).
    g_clock->show( EXPORTING number = one ).
    two = hour+1(1).
    g_clock->show( EXPORTING number = two ).
    g_clock->periods( EXPORTING line = '1' ).
    g_clock->periods( EXPORTING line = '2' ).
    g_clock->periods( EXPORTING line = '3' ).
    minute = sy-uzeit+2(2).
    one = minute+0(1).
    g_clock->show( EXPORTING number = one ).
    two = minute+1(1).
    g_clock->show( EXPORTING number = two ).
    g_clock->periods( EXPORTING line = '1' ).
    g_clock->periods( EXPORTING line = '2' ).
    g_clock->periods( EXPORTING line = '3' ).
    second = sy-uzeit+4(2).
    one = second+0(1).
    g_clock->show( EXPORTING number = one ).
    two = second+1(1).
    g_clock->show( EXPORTING number = two ).

    READ LINE 1.
    MODIFY LINE 1 FIELD VALUE line1 FROM line1.
    READ LINE 2.
    MODIFY LINE 2 FIELD VALUE line2 FROM line2.
    READ LINE 3.
    MODIFY LINE 3 FIELD VALUE line3 FROM line3.

    sender->run( ).
  ENDMETHOD.
ENDCLASS.

START-OF-SELECTION.
  CREATE OBJECT temporizador.
  SET HANDLER lcl_event_handler=>on_timer FOR temporizador.

  temporizador->interval = 1.
  temporizador->run( ).

  DATA: g_clock TYPE REF TO clock.
  CREATE OBJECT g_clock.

  hour = sy-uzeit+0(2).
  one = hour+0(1).
  g_clock->show( EXPORTING number = one ).
  two = hour+1(1).
  g_clock->show( EXPORTING number = two ).
  g_clock->periods( EXPORTING line = '1' ).
  g_clock->periods( EXPORTING line = '2' ).
  g_clock->periods( EXPORTING line = '3' ).
  minute = sy-uzeit+2(2).
  one = minute+0(1).
  g_clock->show( EXPORTING number = one ).
  two = minute+1(1).
  g_clock->show( EXPORTING number = two ).
  g_clock->periods( EXPORTING line = '1' ).
  g_clock->periods( EXPORTING line = '2' ).
  g_clock->periods( EXPORTING line = '3' ).
  second = sy-uzeit+4(2).
  one = second+0(1).
  g_clock->show( EXPORTING number = one ).
  two = second+1(1).
  g_clock->show( EXPORTING number = two ).

  WRITE:/ line1.
  WRITE:/ line2.
  WRITE:/ line3.

Greetings,

Blag.