Hace unos días en el trabajo me tocó hacer un reporte ALV Tree .
No encontré mucha información ni manuales al respecto, mucho menos en español. Pero por suerte pude encontrar un ejemplo que me sirvió mucho. Es un post de ALV Tree orientado a objetos del conocido Alvaro Tejada Galindo (http://atejada.blogspot.com/2007/05/alv-tree-orientado-objetos.html#links)
Por lo tanto aprovecho para hacer referencia de ese post con algunas cosas que faltaban y cambios en la sintaxis para que active. Y además voy a describir en detalle como crear una Dynpro y el Custom Control necesarios para correr el reporte ALV Tree.
1º) Desde la transacción SE38 creamos el reporte Z_ALV_TREE y pegamos el siguiente código:
*&———————————————————————*
*& Report Z_ALV_TREE *
*& *
*&———————————————————————*
*& *
*& *
*&———————————————————————*
REPORT Z_ALV_TREE.
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* DECLARACION DE TYPES *
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TYPES: BEGIN OF TY_SPFLI,
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,
END OF TY_SPFLI.
TYPES: BEGIN OF TY_HEADER,
CARRID TYPE SPFLI-CARRID,
END OF TY_HEADER.
*—————————————————————–*
* DECLARACION DE TABLAS INTERNAS *
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DATA: T_SPFLI TYPE STANDARD TABLE OF TY_SPFLI
WITH HEADER LINE,
TAB_TREE TYPE STANDARD TABLE OF TY_SPFLI
WITH HEADER LINE,
T_TREE TYPE STANDARD TABLE OF TY_SPFLI
WITH HEADER LINE,
T_HEADER TYPE STANDARD TABLE OF TY_HEADER
WITH HEADER LINE.
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* DECLARACION DE VARIABLES *
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DATA: G_ALV_TREE TYPE REF TO CL_GUI_ALV_TREE,
L_HIERARCHY_HEADER TYPE TREEV_HHDR,
GS_FIELDCAT TYPE LVC_S_FCAT,
GT_FIELDCAT_TREE TYPE LVC_T_FCAT,
G_CUSTOM_CONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER.
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* DECLARACION DE FIELD-SYMBOLS *
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FIELD-SYMBOLS: <HEADER> LIKE LINE OF T_HEADER,
<SPFLI> LIKE LINE OF T_SPFLI.
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* SELECTION-SCREEN *
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SELECTION-SCREEN BEGIN OF SCREEN 1001.
SELECTION-SCREEN END OF SCREEN 1001.
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* START-OF-SELECTION *
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START-OF-SELECTION.
PERFORM OBTENER_DATOS.
IF G_ALV_TREE IS INITIAL.
PERFORM INIT_TREE.
CALL METHOD CL_GUI_CFW=>FLUSH
EXCEPTIONS CNTL_SYSTEM_ERROR = 1
CNTL_ERROR = 2.
ENDIF.
CALL SCREEN 100.
*—————————————————————–*
* FORM init_tree *
*—————————————————————–*
FORM INIT_TREE.
DATA: L_TREE_CONTAINER_NAME(30) TYPE C.
L_TREE_CONTAINER_NAME = ‘TREE_CONTROL’.
CREATE OBJECT G_CUSTOM_CONTAINER
EXPORTING
CONTAINER_NAME = L_TREE_CONTAINER_NAME
EXCEPTIONS
CNTL_ERROR = 1
CNTL_SYSTEM_ERROR = 2
CREATE_ERROR = 3
LIFETIME_ERROR = 4
LIFETIME_DYNPRO_DYNPRO_LINK = 5.
CREATE OBJECT G_ALV_TREE
EXPORTING
PARENT = G_CUSTOM_CONTAINER
NODE_SELECTION_MODE = CL_GUI_COLUMN_TREE=>NODE_SEL_MODE_SINGLE
ITEM_SELECTION = »
NO_HTML_HEADER = ‘X’
NO_TOOLBAR = »
EXCEPTIONS
CNTL_ERROR = 1
CNTL_SYSTEM_ERROR = 2
CREATE_ERROR = 3
LIFETIME_ERROR = 4
ILLEGAL_NODE_SELECTION_MODE = 5
FAILED = 6
ILLEGAL_COLUMN_NAME = 7.
PERFORM FILL_CATALOG_TREE.
PERFORM BUILD_HIERARCHY_HEADER CHANGING L_HIERARCHY_HEADER.
CALL METHOD G_ALV_TREE->SET_TABLE_FOR_FIRST_DISPLAY
EXPORTING
IS_HIERARCHY_HEADER = L_HIERARCHY_HEADER
CHANGING
IT_OUTTAB = T_TREE[]
IT_FIELDCATALOG = GT_FIELDCAT_TREE.
PERFORM CREATE_HIERARCHY.
ENDFORM.
*—————————————————————–*
* FORM FILL_CATALOG_TREE *
*—————————————————————–*
FORM FILL_CATALOG_TREE.
DATA: GS_FIELDCAT_ADD TYPE LVC_S_FCAT.
CLEAR GS_FIELDCAT.
GS_FIELDCAT-COL_POS = 1.
GS_FIELDCAT-REPTEXT = ‘Flight’.
GS_FIELDCAT-SCRTEXT_S = ‘Flight’.
GS_FIELDCAT-FIELDNAME = ‘CONNID’.
GS_FIELDCAT-TABNAME = ‘T_SPFLI’.
APPEND GS_FIELDCAT TO GT_FIELDCAT_TREE.
CLEAR GS_FIELDCAT.
GS_FIELDCAT-COL_POS = 2.
GS_FIELDCAT-REPTEXT = ‘Country’.
GS_FIELDCAT-SCRTEXT_S = ‘Country’.
GS_FIELDCAT-FIELDNAME = ‘COUNTRYFR’.
GS_FIELDCAT-TABNAME = ‘T_SPFLI’.
APPEND GS_FIELDCAT TO GT_FIELDCAT_TREE.
CLEAR GS_FIELDCAT.
GS_FIELDCAT-COL_POS = 3.
GS_FIELDCAT-REPTEXT = ‘Dep.City’.
GS_FIELDCAT-SCRTEXT_S = ‘Dep.City’.
GS_FIELDCAT-FIELDNAME = ‘CITYFROM’.
GS_FIELDCAT-TABNAME = ‘T_SPFLI’.
GS_FIELDCAT-OUTPUTLEN = ’15’.
APPEND GS_FIELDCAT TO GT_FIELDCAT_TREE.
CLEAR GS_FIELDCAT.
GS_FIELDCAT-COL_POS = 4.
GS_FIELDCAT-REPTEXT = ‘Dep.Airp’.
GS_FIELDCAT-SCRTEXT_S = ‘Dep.Airp’.
GS_FIELDCAT-FIELDNAME = ‘AIRPFROM’.
GS_FIELDCAT-TABNAME = ‘T_SPFLI’.
GS_FIELDCAT-OUTPUTLEN = ’20’.
APPEND GS_FIELDCAT TO GT_FIELDCAT_TREE.
CLEAR GS_FIELDCAT.
GS_FIELDCAT-COL_POS = 5.
GS_FIELDCAT-REPTEXT = ‘Country’.
GS_FIELDCAT-SCRTEXT_S = ‘Country’.
GS_FIELDCAT-FIELDNAME = ‘COUNTRYTO’.
GS_FIELDCAT-TABNAME = ‘T_SPFLI’.
GS_FIELDCAT-OUTPUTLEN = ’15’.
APPEND GS_FIELDCAT TO GT_FIELDCAT_TREE.
CLEAR GS_FIELDCAT.
GS_FIELDCAT-COL_POS = 6.
GS_FIELDCAT-REPTEXT = ‘Arr.City’.
GS_FIELDCAT-SCRTEXT_S = ‘Arr.City’.
GS_FIELDCAT-FIELDNAME = ‘CITYTO’.
GS_FIELDCAT-TABNAME = ‘T_SPFLI’.
GS_FIELDCAT-OUTPUTLEN = ’20’.
APPEND GS_FIELDCAT TO GT_FIELDCAT_TREE.
ENDFORM.
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* FORM build_hierarchy_header *
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FORM BUILD_HIERARCHY_HEADER CHANGING
P_HIERARCHY_HEADER TYPE TREEV_HHDR.
CLEAR P_HIERARCHY_HEADER.
P_HIERARCHY_HEADER-HEADING = ‘Airline carrier'(300).
P_HIERARCHY_HEADER-WIDTH = 18.
P_HIERARCHY_HEADER-WIDTH_PIX = ‘ ‘.
ENDFORM.
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* FORM create_hierarchy *
*———————————————————————*
FORM CREATE_HIERARCHY.
DATA: L_ROOT_KEY TYPE LVC_NKEY,
L_NEXT_KEY TYPE LVC_NKEY,
L_LAST_KEY TYPE LVC_NKEY,
HEADER TYPE STRING,
W_MENGE_TEXT(13) TYPE C.
CLEAR L_ROOT_KEY.
LOOP AT T_HEADER ASSIGNING <HEADER>.
CLEAR L_ROOT_KEY.
CLEAR L_NEXT_KEY.
PERFORM ADD_NODE USING <HEADER>-CARRID L_ROOT_KEY
CHANGING L_NEXT_KEY.
LOOP AT T_SPFLI ASSIGNING <SPFLI>
WHERE CARRID EQ <HEADER>-CARRID.
MOVE-CORRESPONDING <SPFLI> TO TAB_TREE.
PERFORM ADD_LEAF USING TAB_TREE L_NEXT_KEY
CHANGING L_LAST_KEY.
ENDLOOP.
ENDLOOP.
CALL METHOD G_ALV_TREE->FRONTEND_UPDATE.
ENDFORM.
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* FORM ADD_NODE *
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FORM ADD_NODE USING L_NAME L_ROOT_KEY
CHANGING L_NEXT_KEY.
DATA: L_NODE_TEXT TYPE LVC_VALUE,
LS_TREE TYPE TY_SPFLI.
L_NODE_TEXT = L_NAME.
CALL METHOD G_ALV_TREE->ADD_NODE
EXPORTING
I_RELAT_NODE_KEY = L_ROOT_KEY
I_RELATIONSHIP = CL_GUI_COLUMN_TREE=>RELAT_LAST_CHILD
I_NODE_TEXT = L_NODE_TEXT
IS_OUTTAB_LINE = LS_TREE
IMPORTING
E_NEW_NODE_KEY = L_NEXT_KEY.
ENDFORM.
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* FORM ADD_LEAF *
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FORM ADD_LEAF USING L_TREE TYPE TY_SPFLI
L_NEXT_KEY
CHANGING L_LAST_KEY.
CALL METHOD G_ALV_TREE->ADD_NODE
EXPORTING
I_RELAT_NODE_KEY = L_NEXT_KEY
I_RELATIONSHIP = CL_GUI_COLUMN_TREE=>RELAT_LAST_CHILD
IS_OUTTAB_LINE = TAB_TREE
IMPORTING
E_NEW_NODE_KEY = L_LAST_KEY.
ENDFORM.
*———————————————————————*
* FORM OBTENER_DATOS *
*———————————————————————*
FORM OBTENER_DATOS.
SELECT CARRID CONNID COUNTRYFR CITYFROM
AIRPFROM COUNTRYTO CITYTO
INTO TABLE T_SPFLI
FROM SPFLI.
IF SY-SUBRC EQ 0.
LOOP AT T_SPFLI ASSIGNING <SPFLI>.
MOVE <SPFLI>-CARRID TO T_HEADER-CARRID.
APPEND T_HEADER.
ENDLOOP.
SORT T_HEADER.
DELETE ADJACENT DUPLICATES FROM T_HEADER.
ENDIF.
ENDFORM.
2º) Luego de activar el reporte vamos a la transacción SE80:
Buscamos nuestro programa Z_ALV_TREE. Nos paramos sobre la carpeta con mismo nombre, click con el botón derecho del mouse… opción Crear y luego Dynpro: 
Ingresamos como número de dynpro 100. Ponemos la descripción que queramos y luego de activar apretamos el botón «Dispos.«
A continuación se va a abrir el Screen Painter:
Clickeamos en el botón Custom Control (
) y creamos un cuadrado con el nombre TREE_CONTROL 
Simplemente falta guardar, activar… cerrar el Screen Painter. Y por último en la transacción SE80 doble click en la carpeta Z_ALV_TREE y ejecutamos.
Cabe aclarar que este ejemplo trabaja con la tabla SPFLI que se usa comúnmente en los ejemplos.
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