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Автоматическое обновление ALV-грида по таймеру



 
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PostPosted: Fri Oct 01, 2010 9:32 am    Post subject: Автоматическое обновление ALV-грида по таймеру Reply with quote

Автор: Бородин Игорь
Источник: Авто-рефрешь

Класс:
Code:
*----------------------------------------------------------------------*
*       CLASS lcl_periodic_callback DEFINITION
*----------------------------------------------------------------------*
CLASS lcl_periodic_callback DEFINITION.
  PUBLIC SECTION.
    METHODS:
      constructor      IMPORTING i_interval      TYPE int4
                                 i_performing    TYPE c,
      handle_timeout   FOR EVENT finished OF cl_gui_timer.

  PRIVATE SECTION.
    DATA:
      li_timer         TYPE REF TO cl_gui_timer,
      l_performing     TYPE char30.

ENDCLASS.                    "lcl_grid_refresher DEFINITION
*----------------------------------------------------------------------*
*       CLASS lcl_periodic_callback IMPLEMENTATION
*----------------------------------------------------------------------*
CLASS lcl_periodic_callback IMPLEMENTATION.
  METHOD constructor.

    l_performing = i_performing.

*   таймер: инициализация
    CREATE OBJECT:  li_timer.
    li_timer->interval = i_interval.
    SET HANDLER handle_timeout FOR li_timer.

*   таймер: запуск
    li_timer->run( ).

  ENDMETHOD.                    "constructor
  METHOD handle_timeout.

*   таймер: перезапуск
    li_timer->cancel( ).
    li_timer->run( ).

*   callback
    PERFORM (l_performing) IN PROGRAM (sy-cprog) IF FOUND.

  ENDMETHOD.                    "handle_timeout
ENDCLASS.                    "lcl_periodic_callback IMPLEMENTATION


Пример использования:
Code:
DATA gi_periodic_callback TYPE REF TO lcl_periodic_callback.

CREATE OBJECT gi_periodic_callback
  EXPORTING
    i_interval   = 1                      " -->> время, в секундах
    i_performing = 'REFRESH_ALVGRID'.     " -->> ваша callback-подпрограмма


*&---------------------------------------------------------------------*
*&      Form  REFRESH_ALVGRID
*&---------------------------------------------------------------------*
*       ...а здесь вы обновляете свой грид
*----------------------------------------------------------------------*
FORM refresh_alvgrid.

ENDFORM.                    "REFRESH_ALVGRID
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