ALV List Display dinámico!

Seguramente, algunas vez le han pedido mostrar varios ALV's en una

sola pantalla...Pues ahí es donde es útil el ALV_LIST_DISPLAY, que nos

permite mostrar varias listas...El problema claro está, es que

necesitamos una tabla interna por lista...Eso no está mal...Pero...Que

pasa si no sabemos cuantas listas son??? Que pasa por ejemplo si por

cada Líneas Aerea, debemos mostrar su detalle...Pues bueno...Con un

poco de creatividad y tablas internas dinámicas -:D Podemos resolver el

problema. ( Ojo: Solo funciona para 20 listas...Cosas de SAP -:( ).

Agradecimientos especiales a Nacho por su Macro para limpiar

tablas internas -;)

El reporte quedería así -:)

Y su código es este:

************************************************************************

* INFORMACION GENERAL *

*-----------------------------------------------------------------------

* Nombre del programa: Z_DUMMY_TREE *

* Fecha/Autor: 26.08.2006 / Alvaro Tejada Galindo. *

************************************************************************

REPORT Z_DUMMY_TREE.

*----------------------------------------------------------------------*

* DECLARACION DE TYPE-POOLS *

*----------------------------------------------------------------------*

TYPE-POOLS: SLIS.

*----------------------------------------------------------------------*

* DECLARACION DE TABLAS *

*----------------------------------------------------------------------*

TABLES: SCARR, SPFLI.

*----------------------------------------------------------------------*

* VARIABLES *

*----------------------------------------------------------------------*

DATA: G_FIELDCAT TYPE SLIS_T_FIELDCAT_ALV,

G_SORT TYPE SLIS_T_SORTINFO_ALV WITH HEADER LINE,

GT_PRINT TYPE SLIS_PRINT_ALV,

GS_LAYOUT TYPE SLIS_LAYOUT_ALV,

GT_EVENTS TYPE SLIS_T_EVENT,

G_PROGRAM TYPE SY-REPID,

TAB_NAME TYPE STRING,

W_TABIX TYPE STRING,

G_LINES TYPE STRING.

*----------------------------------------------------------------------*

* TYPES *

*----------------------------------------------------------------------*

TYPES: BEGIN OF TY_SPFLI,

MANDT TYPE SPFLI-MANDT,

CARRID TYPE SPFLI-CARRID,

CONNID TYPE SPFLI-CONNID,

COUNTRYFR TYPE SPFLI-COUNTRYFR,

CITYFROM TYPE SPFLI-CITYFROM,

AIRPFROM TYPE SPFLI-AIRPFROM,

COUNTRYTO TYPE SPFLI-COUNTRYTO,

CITYTO TYPE SPFLI-CITYTO.

TYPES: END OF TY_SPFLI.

TYPES: BEGIN OF TY_STUFF,

TABNAME TYPE TABNAME,

TDREF TYPE REF TO DATA,

END OF TY_STUFF.

DATA T_STUFF TYPE TABLE OF TY_STUFF WITH NON-UNIQUE KEY TABNAME.

DATA: DESCR_STRUCT_REF TYPE REF TO CL_ABAP_STRUCTDESCR,

DATAREF TYPE REF TO DATA,

WA_FCAT TYPE LVC_S_FCAT,

IT_FIELDCATALOG TYPE LVC_T_FCAT.

*----------------------------------------------------------------------*

* FIELD-SYMBOLS *

*----------------------------------------------------------------------*

FIELD-SYMBOLS: <LINE> TYPE ANY,

<FIELD> TYPE ANY,

<COMPONENT> TYPE ABAP_COMPDESCR,

<DYN_TABLE> TYPE STANDARD TABLE,

<FS> TYPE ANY,

<DYN_WA>,

<TABLE>.

*----------------------------------------------------------------------*

* TABLAS INTERNAS *

*----------------------------------------------------------------------*

DATA: T_SPFLI TYPE STANDARD TABLE OF TY_SPFLI WITH HEADER LINE,

T_SPFLI_HEADER TYPE STANDARD TABLE OF TY_SPFLI WITH HEADER LINE,

T_SPFLI_DETAIL TYPE STANDARD TABLE OF TY_SPFLI WITH HEADER LINE.

*----------------------------------------------------------------------*

* MACROS *

*----------------------------------------------------------------------*

DEFINE LIMPIAR_TABLA.

CLEAR &1.

REFRESH &1.

END-OF-DEFINITION.

*----------------------------------------------------------------------*

* CRITERIOS DE SELECCIÓN *

*----------------------------------------------------------------------*

SELECTION-SCREEN BEGIN OF BLOCK B01 WITH FRAME TITLE TEXT-B01.

SELECT-OPTIONS:

S_CARRID FOR SCARR-CARRID.

SELECTION-SCREEN END OF BLOCK B01.

*----------------------------------------------------------------------*

* PRINCIPAL

*----------------------------------------------------------------------*

START-OF-SELECTION.

PERFORM OBTENER_DATOS.

PERFORM GENERAR_ALV.

PERFORM GENERAR_ALV_LIST.

*---------------------------------------------------------------------*

* FORM OBTENER_DATOS *

*---------------------------------------------------------------------*

* Obtenemos los datos *

*---------------------------------------------------------------------*

FORM OBTENER_DATOS.

SELECT MANDT CARRID CONNID COUNTRYFR CITYFROM

AIRPFROM COUNTRYTO CITYTO

INTO TABLE T_SPFLI

FROM SPFLI

WHERE CARRID IN S_CARRID.

IF NOT T_SPFLI[] IS INITIAL.

T_SPFLI_HEADER[] = T_SPFLI[].

DELETE ADJACENT DUPLICATES FROM T_SPFLI_HEADER

COMPARING CARRID.

ENDIF.

ENDFORM.

*&---------------------------------------------------------------------*

*& Form GENERAR_ALV *

*&---------------------------------------------------------------------*

* Creamos el ALV *

*----------------------------------------------------------------------*

FORM GENERAR_ALV.

IF NOT T_SPFLI_HEADER[] IS INITIAL.

PERFORM FORMATEAR_DATOS_ALV USING G_FIELDCAT[].

PERFORM BUILD_SORT.

ENDIF.

ENDFORM. "GENERAR_ALV

*&---------------------------------------------------------------------*

*& Form FORMATEAR_DATOS_ALV *

*&---------------------------------------------------------------------*

* Establecemos el catalogo de ALV. *

*----------------------------------------------------------------------*

FORM FORMATEAR_DATOS_ALV USING T_FIELDCAT TYPE SLIS_T_FIELDCAT_ALV.

DATA: L_FIELDCAT TYPE SLIS_FIELDCAT_ALV.

CLEAR: T_FIELDCAT.

REFRESH: T_FIELDCAT.

CLEAR L_FIELDCAT.

L_FIELDCAT-TABNAME = 'T_SPFLI'.

L_FIELDCAT-FIELDNAME = 'CARRID'.

L_FIELDCAT-SELTEXT_L = 'Airline carrier ID'.

L_FIELDCAT-COL_POS = 1.

L_FIELDCAT-OUTPUTLEN = 15.

APPEND L_FIELDCAT TO T_FIELDCAT.

CLEAR L_FIELDCAT.

L_FIELDCAT-TABNAME = 'T_SPFLI'.

L_FIELDCAT-FIELDNAME = 'CONNID'.

L_FIELDCAT-SELTEXT_L = 'Flight connection Id'.

L_FIELDCAT-COL_POS = 2.

L_FIELDCAT-OUTPUTLEN = 15.

APPEND L_FIELDCAT TO T_FIELDCAT.

CLEAR L_FIELDCAT.

L_FIELDCAT-TABNAME = 'T_SPFLI'.

L_FIELDCAT-FIELDNAME = 'COUNTRYFR'.

L_FIELDCAT-SELTEXT_L = 'Country key'.

L_FIELDCAT-COL_POS = 3.

L_FIELDCAT-OUTPUTLEN = 15.

APPEND L_FIELDCAT TO T_FIELDCAT.

CLEAR L_FIELDCAT.

L_FIELDCAT-TABNAME = 'T_SPFLI'.

L_FIELDCAT-FIELDNAME = 'CITYFROM'.

L_FIELDCAT-SELTEXT_L = 'City of departure'.

L_FIELDCAT-COL_POS = 4.

L_FIELDCAT-OUTPUTLEN = 15.

APPEND L_FIELDCAT TO T_FIELDCAT.

CLEAR L_FIELDCAT.

L_FIELDCAT-TABNAME = 'T_SPFLI'.

L_FIELDCAT-FIELDNAME = 'AIRPFROM'.

L_FIELDCAT-SELTEXT_L = 'Airport of departure'.

L_FIELDCAT-COL_POS = 5.

L_FIELDCAT-OUTPUTLEN = 15.

APPEND L_FIELDCAT TO T_FIELDCAT.

CLEAR L_FIELDCAT.

L_FIELDCAT-TABNAME = 'T_SPFLI'.

L_FIELDCAT-FIELDNAME = 'COUNTRYTO'.

L_FIELDCAT-SELTEXT_L = 'Country key'.

L_FIELDCAT-COL_POS = 6.

L_FIELDCAT-OUTPUTLEN = 15.

APPEND L_FIELDCAT TO T_FIELDCAT.

CLEAR L_FIELDCAT.

L_FIELDCAT-TABNAME = 'T_SPFLI'.

L_FIELDCAT-FIELDNAME = 'CITYTO'.

L_FIELDCAT-SELTEXT_L = 'Arrival city'.

L_FIELDCAT-COL_POS = 7.

L_FIELDCAT-OUTPUTLEN = 15.

APPEND L_FIELDCAT TO T_FIELDCAT.

ENDFORM. "FORMATEAR_DATOS_ALV

*&---------------------------------------------------------------------*

*& Form BUILD_SORT

*&---------------------------------------------------------------------*

* Crea el ordenamiento del reporte

*----------------------------------------------------------------------*

FORM BUILD_SORT.

CLEAR G_SORT.

G_SORT-SPOS = 1.

G_SORT-FIELDNAME = 'CARRID'.

G_SORT-UP = 'X'.

APPEND G_SORT.

ENDFORM.

*---------------------------------------------------------------------*

* FORM CREAR_ALV_LIST *

*---------------------------------------------------------------------*

* ........ *

*---------------------------------------------------------------------*

FORM GENERAR_ALV_LIST.

DATA L_STUFF TYPE TY_STUFF.

G_PROGRAM = SY-REPID.

CALL FUNCTION 'REUSE_ALV_BLOCK_LIST_INIT'

EXPORTING

I_CALLBACK_PROGRAM = G_PROGRAM.

LOOP AT T_SPFLI_HEADER.

W_TABIX = SY-TABIX.

LIMPIAR_TABLA T_SPFLI_DETAIL.

LOOP AT T_SPFLI INTO T_SPFLI_DETAIL

WHERE CARRID EQ T_SPFLI_HEADER-CARRID.

APPEND T_SPFLI_DETAIL.

ENDLOOP.

CONCATENATE 'TABLE_' W_TABIX INTO

TAB_NAME.

PERFORM CREATE_TABLE USING 'SPFLI' TAB_NAME.

LOOP AT T_SPFLI_DETAIL ASSIGNING <LINE>.

G_LINES = <LINE>.

ASSIGN <DYN_WA> TO <TABLE>.

<TABLE> = G_LINES.

APPEND <DYN_WA> TO <DYN_TABLE>.

ENDLOOP.

PERFORM CREAR_ALV_LIST TABLES <DYN_TABLE>.

ENDLOOP.

CALL FUNCTION 'REUSE_ALV_BLOCK_LIST_DISPLAY'

EXPORTING

IS_PRINT = GT_PRINT.

ENDFORM.

*---------------------------------------------------------------------*

* FORM CREAR_ALV_LIST *

*---------------------------------------------------------------------*

* ........ *

*---------------------------------------------------------------------*

FORM CREAR_ALV_LIST TABLES T_TABLE STRUCTURE T_SPFLI_DETAIL.

CALL FUNCTION 'REUSE_ALV_BLOCK_LIST_APPEND'

EXPORTING

IT_FIELDCAT = G_FIELDCAT

IS_LAYOUT = GS_LAYOUT

I_TABNAME = 'T_SPFLI'

IT_EVENTS = GT_EVENTS

TABLES

T_OUTTAB = T_TABLE.

ENDFORM.

*---------------------------------------------------------------------*

* FORM CREATE_TABLE *

*---------------------------------------------------------------------*

* ........ *

*---------------------------------------------------------------------*

FORM CREATE_TABLE USING MY_TAB TAB_NAME.

DATA L_STUFF TYPE TY_STUFF.

CREATE DATA DATAREF TYPE (MY_TAB).

ASSIGN DATAREF->* TO <FS>.

DESCR_STRUCT_REF ?= CL_ABAP_TYPEDESCR=>DESCRIBE_BY_DATA( <FS> ).

LIMPIAR_TABLA IT_FIELDCATALOG.

LOOP AT DESCR_STRUCT_REF->COMPONENTS ASSIGNING <COMPONENT>.

WA_FCAT-FIELDNAME = <COMPONENT>-NAME.

WA_FCAT-REF_TABLE = MY_TAB.

WA_FCAT-REF_FIELD = <COMPONENT>-NAME.

APPEND WA_FCAT TO IT_FIELDCATALOG.

ENDLOOP.

CALL METHOD CL_ALV_TABLE_CREATE=>CREATE_DYNAMIC_TABLE

EXPORTING

IT_FIELDCATALOG = IT_FIELDCATALOG

IMPORTING

EP_TABLE = DATAREF

EXCEPTIONS

OTHERS = 1.

ASSIGN DATAREF->* TO <DYN_TABLE>.

L_STUFF-TABNAME = TAB_NAME.

CREATE DATA L_STUFF-TDREF LIKE LINE OF <DYN_TABLE>.

ASSIGN L_STUFF-TDREF->* TO <DYN_WA>.

ENDFORM. "CREATE_TABLE