Leave to screen 0 does not branch to initialization event (ALV)

Question

Hi All,
I'm new at this forum thing so be gentle. I have created the standard custom control in a new screen, setup the field catalog and other parameters and when I call the screen and do the :
  IF g_custom_container IS INITIAL.
    CREATE OBJECT g_custom_container
       EXPORTING
          container_name = 'ZTMR_EVAL_GRID'.
    CREATE OBJECT g_grid
       EXPORTING
         i_parent = g_custom_container.
    CLEAR wa_disvariant.
    wa_disvariant-report = sy-repid.
    CALL METHOD g_grid->set_table_for_first_display
      EXPORTING
        is_variant      = wa_disvariant
        i_save          = 'A'
        is_layout       = wa_layout
      CHANGING
        it_outtab       = detail_tab[]
        it_fieldcatalog = itab_fldcat
        it_sort         = itab_sort.
    CREATE OBJECT event_receiver.
    SET HANDLER event_receiver->handle_top_of_page FOR g_grid.
  ENDIF.
, everything works great. The problem occurs when hit the BACK button in my PAI module, it returns to the line after the CALL SCREEN XXX, ENDFORM, PERFORM output_alv_grid_report and then branches to :
FUNCTION hrpy_process_fire_event in the source code of LHRST1U01 in the main program SAPLHRST1.
It does this instead of branching to the INITIALIZATION event (selection-screen) which is what it's supposed to do?
Any help would be greatly appreciated - Thanks in advance,
Jim

Answer 1

hi,
REPORT  ZTEST1234_ALV_TOP    MESSAGE-ID ZZ                           .
DATA: G_GRID TYPE REF TO CL_GUI_ALV_GRID.
DATA: L_VALID TYPE C,
      V_FLAG,
      V_DATA_CHANGE,
      V_ROW TYPE LVC_S_ROW,
      V_COLUMN TYPE LVC_S_COL,
      V_ROW_NUM TYPE LVC_S_ROID.
"The Below Definitions Must.....
DATA:
* Reference to document
       DG_DYNDOC_ID       TYPE REF TO CL_DD_DOCUMENT,
* Reference to split container
       DG_SPLITTER          TYPE REF TO CL_GUI_SPLITTER_CONTAINER,
* Reference to grid container
       DG_PARENT_GRID     TYPE REF TO CL_GUI_CONTAINER,
* Reference to html container
       DG_HTML_CNTRL        TYPE REF TO CL_GUI_HTML_VIEWER,
* Reference to html container
       DG_PARENT_HTML     TYPE REF TO CL_GUI_CONTAINER.
"up to here
*       CLASS lcl_event_handler DEFINITION
CLASS LCL_EVENT_HANDLER DEFINITION .
  PUBLIC SECTION .
    METHODS:
**Hot spot Handler
    HANDLE_HOTSPOT_CLICK FOR EVENT HOTSPOT_CLICK OF CL_GUI_ALV_GRID
                      IMPORTING E_ROW_ID E_COLUMN_ID ES_ROW_NO,
**Double Click Handler
    HANDLE_DOUBLE_CLICK FOR EVENT DOUBLE_CLICK OF CL_GUI_ALV_GRID
                                     IMPORTING E_ROW E_COLUMN ES_ROW_NO,
    TOP_OF_PAGE FOR EVENT TOP_OF_PAGE              "event handler
                         OF CL_GUI_ALV_GRID
                         IMPORTING E_DYNDOC_ID.
ENDCLASS.                    "lcl_event_handler DEFINITION
*       CLASS lcl_event_handler IMPLEMENTATION
CLASS LCL_EVENT_HANDLER IMPLEMENTATION.
*Handle Hotspot Click
  METHOD HANDLE_HOTSPOT_CLICK .
    CLEAR: V_ROW,V_COLUMN,V_ROW_NUM.
    V_ROW  = E_ROW_ID.
    V_COLUMN = E_COLUMN_ID.
    V_ROW_NUM = ES_ROW_NO.
    MESSAGE I000 WITH V_ROW 'clicked'.
  ENDMETHOD.                    "lcl_event_handler
*Handle Double Click
  METHOD  HANDLE_DOUBLE_CLICK.
  ENDMETHOD.                    "handle_double_click
  METHOD TOP_OF_PAGE.                   "implementation
* Top-of-page event
    PERFORM EVENT_TOP_OF_PAGE USING DG_DYNDOC_ID.
  ENDMETHOD.                            "top_of_page
ENDCLASS.                    "LCL_EVENT_HANDLER IMPLEMENTATION
*&             Global Definitions
DATA:      G_CUSTOM_CONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER,"Container1
            G_HANDLER TYPE REF TO LCL_EVENT_HANDLER. "handler
DATA: OK_CODE LIKE SY-UCOMM,
      SAVE_OK LIKE SY-UCOMM,
      G_CONTAINER1 TYPE SCRFNAME VALUE 'TEST',
      GS_LAYOUT TYPE LVC_S_LAYO.
*- Fieldcatalog for First and second Report
DATA: IT_FIELDCAT  TYPE  LVC_T_FCAT,
      X_FIELDCAT TYPE LVC_S_FCAT,
      LS_VARI  TYPE DISVARIANT.
*                START-OF_SELECTION
START-OF-SELECTION.
  DATA:BEGIN OF  ITAB OCCURS 0,
       VBELN LIKE LIKP-VBELN,
       POSNR LIKE LIPS-POSNR,
       CELLCOLOR TYPE LVC_T_SCOL, "required for color
       DROP(10),
       END OF ITAB.
  SELECT VBELN
         POSNR
         FROM LIPS
         UP TO 20 ROWS
         INTO CORRESPONDING FIELDS OF TABLE ITAB.
END-OF-SELECTION.
  IF NOT ITAB[] IS INITIAL.
    <b>CALL SCREEN 100.</b>
  ELSE.
    MESSAGE I002 WITH 'NO DATA FOR THE SELECTION'(004).
  ENDIF.
*&      Form  CREATE_AND_INIT_ALV
*       text
FORM CREATE_AND_INIT_ALV .
  DATA: LT_EXCLUDE TYPE UI_FUNCTIONS.
  "attention.....from here
  "split your container here...into two parts
  "create the container
  CREATE OBJECT G_CUSTOM_CONTAINER
           EXPORTING CONTAINER_NAME = G_CONTAINER1.
  "this is for top of page
* Create TOP-Document
  CREATE OBJECT DG_DYNDOC_ID
                   EXPORTING STYLE = 'ALV_GRID'.
* Create Splitter for custom_container
  CREATE OBJECT DG_SPLITTER
             EXPORTING PARENT  = G_CUSTOM_CONTAINER
                       ROWS    = 2
                       COLUMNS = 1.
* Split the custom_container to two containers and move the reference
* to receiving containers g_parent_html and g_parent_grid
  "i am allocating the space for grid and top of page
  CALL METHOD DG_SPLITTER->GET_CONTAINER
    EXPORTING
      ROW       = 1
      COLUMN    = 1
    RECEIVING
      CONTAINER = DG_PARENT_HTML.
  CALL METHOD DG_SPLITTER->GET_CONTAINER
    EXPORTING
      ROW       = 2
      COLUMN    = 1
    RECEIVING
      CONTAINER = DG_PARENT_GRID.
  "you can set the height of it
* Set height for g_parent_html
  CALL METHOD DG_SPLITTER->SET_ROW_HEIGHT
    EXPORTING
      ID     = 1
      HEIGHT = 5.
  "from here as usual..you need to specify parent as splitter part
  "which we alloted for grid
  CREATE OBJECT G_GRID
         EXPORTING I_PARENT = DG_PARENT_GRID.
* Set a titlebar for the grid control
  CLEAR GS_LAYOUT.
  GS_LAYOUT-GRID_TITLE = TEXT-003.
  GS_LAYOUT-ZEBRA = SPACE.
  GS_LAYOUT-CWIDTH_OPT = 'X'.
  GS_LAYOUT-NO_ROWMARK = 'X'.
  GS_LAYOUT-CTAB_FNAME = 'CELLCOLOR'.
  CALL METHOD G_GRID->REGISTER_EDIT_EVENT
    EXPORTING
      I_EVENT_ID = CL_GUI_ALV_GRID=>MC_EVT_ENTER.
  CREATE OBJECT G_HANDLER.
  SET HANDLER G_HANDLER->HANDLE_DOUBLE_CLICK FOR G_GRID.
  SET HANDLER G_HANDLER->HANDLE_HOTSPOT_CLICK FOR G_GRID.
  SET HANDLER G_HANDLER->TOP_OF_PAGE FOR G_GRID.
  DATA: LS_CELLCOLOR TYPE LVC_S_SCOL. "required for color
  DATA: L_INDEX TYPE SY-TABIX.
  "Here i am changing the color of line 1,5,10...
  "so you can change the color of font conditionally
  LOOP AT ITAB.
    L_INDEX = SY-TABIX.
    IF L_INDEX = 1 OR L_INDEX = 5 OR L_INDEX = 10.
      LS_CELLCOLOR-FNAME = 'VBELN'.
      LS_CELLCOLOR-COLOR-COL = '6'.
      LS_CELLCOLOR-COLOR-INT = '0'.
      LS_CELLCOLOR-COLOR-INV = '1'.
      APPEND LS_CELLCOLOR TO ITAB-CELLCOLOR.
      MODIFY ITAB INDEX L_INDEX TRANSPORTING CELLCOLOR.
      LS_CELLCOLOR-FNAME = 'POSNR'.
      LS_CELLCOLOR-COLOR-COL = '6'.
      LS_CELLCOLOR-COLOR-INT = '0'.
      LS_CELLCOLOR-COLOR-INV = '1'.
      APPEND LS_CELLCOLOR TO ITAB-CELLCOLOR.
      MODIFY ITAB INDEX L_INDEX TRANSPORTING CELLCOLOR.
    ENDIF.
  ENDLOOP.
* setting focus for created grid control
  CALL METHOD CL_GUI_CONTROL=>SET_FOCUS
    EXPORTING
      CONTROL = G_GRID.
* Build fieldcat and set editable for date and reason code
* edit enabled. Assign a handle for the dropdown listbox.
  PERFORM BUILD_FIELDCAT.
  PERFORM  SET_DRDN_TABLE.
* Optionally restrict generic functions to 'change only'.
*   (The user shall not be able to add new lines).
  PERFORM EXCLUDE_TB_FUNCTIONS CHANGING LT_EXCLUDE.
**Vaiant to save the layout
  LS_VARI-REPORT      = SY-REPID.
  LS_VARI-HANDLE      = SPACE.
  LS_VARI-LOG_GROUP   = SPACE.
  LS_VARI-USERNAME    = SPACE.
  LS_VARI-VARIANT     = SPACE.
  LS_VARI-TEXT        = SPACE.
  LS_VARI-DEPENDVARS  = SPACE.
**Calling the Method for ALV output
  CALL METHOD G_GRID->SET_TABLE_FOR_FIRST_DISPLAY
    EXPORTING
      IT_TOOLBAR_EXCLUDING = LT_EXCLUDE
      IS_VARIANT           = LS_VARI
      IS_LAYOUT            = GS_LAYOUT
      I_SAVE               = 'A'
    CHANGING
      IT_FIELDCATALOG      = IT_FIELDCAT
      IT_OUTTAB            = ITAB[].
  "do these..{
* Initializing document
  CALL METHOD DG_DYNDOC_ID->INITIALIZE_DOCUMENT.
* Processing events
  CALL METHOD G_GRID->LIST_PROCESSING_EVENTS
    EXPORTING
      I_EVENT_NAME = 'TOP_OF_PAGE'
      I_DYNDOC_ID  = DG_DYNDOC_ID.
  "end }
* Set editable cells to ready for input initially
  CALL METHOD G_GRID->SET_READY_FOR_INPUT
    EXPORTING
      I_READY_FOR_INPUT = 1.
ENDFORM.                               "CREATE_AND_INIT_ALV
*&      Form  EXCLUDE_TB_FUNCTIONS
*       text
*      -->PT_EXCLUDE text
FORM EXCLUDE_TB_FUNCTIONS CHANGING PT_EXCLUDE TYPE UI_FUNCTIONS.
* Only allow to change data not to create new entries (exclude
* generic functions).
  DATA LS_EXCLUDE TYPE UI_FUNC.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_COPY_ROW.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_DELETE_ROW.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_APPEND_ROW.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_INSERT_ROW.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_MOVE_ROW.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_COPY.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_CUT.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_PASTE.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_PASTE_NEW_ROW.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
  LS_EXCLUDE = CL_GUI_ALV_GRID=>MC_FC_LOC_UNDO.
  APPEND LS_EXCLUDE TO PT_EXCLUDE.
ENDFORM.                               " EXCLUDE_TB_FUNCTIONS
*&      Form  build_fieldcat
*       Fieldcatalog
FORM BUILD_FIELDCAT .
  DATA: L_POS TYPE I.
  L_POS = L_POS + 1.
  X_FIELDCAT-SCRTEXT_M = 'Delivery'(024).
  X_FIELDCAT-FIELDNAME = 'VBELN'.
  X_FIELDCAT-TABNAME = 'IT_FINAL'.
  X_FIELDCAT-COL_POS    = L_POS.
  X_FIELDCAT-NO_ZERO    = 'X'.
  X_FIELDCAT-OUTPUTLEN = '10'.
  X_FIELDCAT-HOTSPOT = 'X'.
  APPEND X_FIELDCAT TO IT_FIELDCAT.
  CLEAR X_FIELDCAT.
  L_POS = L_POS + 1.
  X_FIELDCAT-SCRTEXT_M = 'Item'(025).
  X_FIELDCAT-FIELDNAME = 'POSNR'.
  X_FIELDCAT-TABNAME = 'IT_FINAL'.
  X_FIELDCAT-COL_POS    = L_POS.
  X_FIELDCAT-OUTPUTLEN = '5'.
  APPEND X_FIELDCAT TO IT_FIELDCAT.
  CLEAR X_FIELDCAT.
  L_POS = L_POS + 1.
  X_FIELDCAT-SCRTEXT_M = 'Drop'(025).
  X_FIELDCAT-FIELDNAME = 'DROP'.
  X_FIELDCAT-TABNAME = 'IT_FINAL'.
  X_FIELDCAT-COL_POS    = L_POS.
  X_FIELDCAT-OUTPUTLEN = '5'.
  X_FIELDCAT-EDIT = 'X'.
  X_FIELDCAT-DRDN_HNDL = '1'.
  X_FIELDCAT-DRDN_ALIAS = 'X'.
  APPEND X_FIELDCAT TO IT_FIELDCAT.
  CLEAR X_FIELDCAT.
ENDFORM.                    " build_fieldcat
*&      Module  STATUS_0100  OUTPUT
*       text
MODULE STATUS_0100 OUTPUT.
  SET PF-STATUS 'MAIN100'.
  SET TITLEBAR 'MAIN100'.
  IF G_CUSTOM_CONTAINER IS INITIAL.
**Initializing the grid and calling the fm to Display the O/P
    PERFORM CREATE_AND_INIT_ALV.
  ENDIF.
ENDMODULE.                 " STATUS_0100  OUTPUT
*&      Module  USER_COMMAND_0100  INPUT
*       text
MODULE USER_COMMAND_0100 INPUT.
  CASE SY-UCOMM.
    WHEN 'BACK'.
      LEAVE TO SCREEN 0.
  ENDCASE.
ENDMODULE.                 " USER_COMMAND_0100  INPUT
*&      Form  SET_DRDN_TABLE
*       text
FORM SET_DRDN_TABLE.
  DATA:LT_DRAL TYPE LVC_T_DRAL,
        LS_DRAL TYPE LVC_S_DRAL.
  LOOP AT ITAB .
* First listbox (handle '1').
    IF SY-INDEX = 1.
      LS_DRAL-HANDLE = '1'.
      LS_DRAL-VALUE =  ' '.
      LS_DRAL-INT_VALUE =  ' '.
    ELSE.
      LS_DRAL-HANDLE = '1'.
      LS_DRAL-VALUE =  ITAB-POSNR.
      LS_DRAL-INT_VALUE =  ITAB-POSNR.
    ENDIF.
    APPEND LS_DRAL TO LT_DRAL.
  ENDLOOP.
**Setting the Drop down table for Reason Code
  CALL METHOD G_GRID->SET_DROP_DOWN_TABLE
    EXPORTING
      IT_DROP_DOWN_ALIAS = LT_DRAL.
ENDFORM.                               " set_drdn_table
*&      Form  EVENT_TOP_OF_PAGE
*       text
*      -->DG_DYNDOC_ID  text
FORM EVENT_TOP_OF_PAGE USING   DG_DYNDOC_ID TYPE REF TO CL_DD_DOCUMENT.
  "this is more clear.....check it
  "first add text, then pass it to comentry write fm
  DATA : DL_TEXT(255) TYPE C.  "Text
* Populating header to top-of-page
  CALL METHOD DG_DYNDOC_ID->ADD_TEXT
    EXPORTING
      TEXT      = 'Test Report'
      SAP_STYLE = CL_DD_AREA=>HEADING.
* Add new-line
  CALL METHOD DG_DYNDOC_ID->NEW_LINE.
  CLEAR : DL_TEXT.
* Move program ID
  CONCATENATE 'Program Name :' SY-REPID
         INTO DL_TEXT SEPARATED BY SPACE.
* Add Program Name to Document
  PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
  CALL METHOD DG_DYNDOC_ID->NEW_LINE.
  CLEAR : DL_TEXT.
* Move User ID
  CONCATENATE 'User ID :' SY-UNAME INTO DL_TEXT SEPARATED BY SPACE
* Add User ID to Document
  PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
  CALL METHOD DG_DYNDOC_ID->NEW_LINE.
  CLEAR : DL_TEXT.
* Move Client
  CONCATENATE 'Client :' SY-MANDT INTO DL_TEXT SEPARATED BY SPACE.
* Add Client to Document
  PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
  CALL METHOD DG_DYNDOC_ID->NEW_LINE.
  CLEAR : DL_TEXT.
* Move date
  WRITE SY-DATUM TO DL_TEXT.
  CONCATENATE 'Date :' DL_TEXT INTO DL_TEXT SEPARATED BY SPACE.
* Add Date to Document
  PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
  CALL METHOD DG_DYNDOC_ID->NEW_LINE.
  CLEAR : DL_TEXT.
* Move time
  WRITE SY-UZEIT TO DL_TEXT.
  CONCATENATE 'Time :' DL_TEXT INTO DL_TEXT SEPARATED BY SPACE.
* Add Time to Document
  PERFORM ADD_TEXT USING DL_TEXT.
* Add new-line
  CALL METHOD DG_DYNDOC_ID->NEW_LINE.
* Populating data to html control
  PERFORM HTML.
ENDFORM.                    " EVENT_TOP_OF_PAGE
*&      Form  ADD_TEXT
*       To add Text
FORM ADD_TEXT USING P_TEXT TYPE SDYDO_TEXT_ELEMENT.
* Adding text
  CALL METHOD DG_DYNDOC_ID->ADD_TEXT
    EXPORTING
      TEXT         = P_TEXT
      SAP_EMPHASIS = CL_DD_AREA=>HEADING.
ENDFORM.                    " ADD_TEXT
*&      Form  HTML
*       text
FORM HTML.
  DATA : DL_LENGTH  TYPE I,                           " Length
         DL_BACKGROUND_ID TYPE SDYDO_KEY VALUE SPACE. " Background_id
* Creating html control
  IF DG_HTML_CNTRL IS INITIAL.
    CREATE OBJECT DG_HTML_CNTRL
         EXPORTING
              PARENT    = DG_PARENT_HTML.
  ENDIF.
* Reuse_alv_grid_commentary_set
  CALL FUNCTION 'REUSE_ALV_GRID_COMMENTARY_SET'
    EXPORTING
      DOCUMENT = DG_DYNDOC_ID
      BOTTOM   = SPACE
    IMPORTING
      LENGTH   = DL_LENGTH.
* Get TOP->HTML_TABLE ready
  CALL METHOD DG_DYNDOC_ID->MERGE_DOCUMENT.
* Set wallpaper
  CALL METHOD DG_DYNDOC_ID->SET_DOCUMENT_BACKGROUND
    EXPORTING
      PICTURE_ID = DL_BACKGROUND_ID.
* Connect TOP document to HTML-Control
  DG_DYNDOC_ID->HTML_CONTROL = DG_HTML_CNTRL.
* Display TOP document
  CALL METHOD DG_DYNDOC_ID->DISPLAY_DOCUMENT
    EXPORTING
      REUSE_CONTROL      = 'X'
      PARENT             = DG_PARENT_HTML
    EXCEPTIONS
      HTML_DISPLAY_ERROR = 1.
  IF SY-SUBRC NE 0.
    MESSAGE I999 WITH 'Error in displaying top-of-page'(036).
  ENDIF.
ENDFORM.                    " HTML
Regards
Vijay