This program demonstrates how to create TOP OF PAGE for an ALV grid displayed through CL_GUI_ALV_GRID. One interesting fact which may be considered here is that the splitter TOP-OF-PAGE is not called while printing or background spool and the TOP-OF-PAGE printed in the spool cannot be displayed in the foreground.
The TOP-OF-PAGE displayed in foreground (this TOP-OF-PAGE won't be printed):
Choose the list output:
The list output(this top-of-page will be printed):
The code:
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REPORT z_sourav_alv_top_of_page.
CLASS cl_main DEFINITION.
PUBLIC SECTION.
METHODS:
constructor,
get_data,
populate_fc_layout,
top_of_page FOR EVENT top_of_page OF cl_gui_alv_grid
IMPORTING
e_dyndoc_id
table_index,
print_top_of_page FOR EVENT print_top_of_page OF cl_gui_alv_grid
IMPORTING table_index,
display.
PROTECTED SECTION.
PRIVATE SECTION.
TYPE-POOLS:sdydo.
DATA:i_sbook TYPE STANDARD TABLE OF sbook INITIAL SIZE 0.
DATA:oref_splitter TYPE REF TO cl_gui_splitter_container,
oref_container TYPE REF TO cl_gui_custom_container,
oref_alv TYPE REF TO cl_gui_alv_grid,
container1 TYPE REF TO cl_gui_container,
container2 TYPE REF TO cl_gui_container,
oref_doc TYPE REF TO cl_dd_document,
oref_html TYPE REF TO cl_gui_html_viewer,
wa_layout TYPE lvc_s_layo,
i_fieldcatalog TYPE lvc_t_fcat.
ENDCLASS.
CLASS cl_main IMPLEMENTATION.
METHOD constructor.
CREATE OBJECT oref_container
EXPORTING
container_name = 'CONTAINER'
repid = 'Z_SOURAV_ALV_TOP_OF_PAGE'
dynnr = '0100'
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
create_error = 3
lifetime_error = 4
lifetime_dynpro_dynpro_link = 5
OTHERS = 6.
IF sy-subrc <> 0.
ENDIF.
CREATE OBJECT oref_splitter
EXPORTING
parent = oref_container
rows = 2
columns = 1
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
OTHERS = 3.
IF sy-subrc <> 0.
ENDIF.
CALL METHOD oref_splitter->get_container
EXPORTING
row = 1
column = 1
RECEIVING
container = container1.
CALL METHOD oref_splitter->set_row_height
EXPORTING
id = 1
height = 20
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
OTHERS = 3.
IF sy-subrc <> 0.
ENDIF.
CALL METHOD oref_splitter->get_container
EXPORTING
row = 2
column = 1
RECEIVING
container = container2.
CREATE OBJECT oref_doc
EXPORTING
style = 'ALV_GRID'.
CREATE OBJECT oref_alv
EXPORTING
i_parent = container2
EXCEPTIONS
error_cntl_create = 1
error_cntl_init = 2
error_cntl_link = 3
error_dp_create = 4
OTHERS = 5.
IF sy-subrc <> 0.
ENDIF.
ENDMETHOD.
METHOD get_data.
SELECT
IF sy-subrc <> 0.
ENDIF.
ENDMETHOD.
METHOD populate_fc_layout.
CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
EXPORTING
i_structure_name = 'SBOOK'
i_client_never_display = 'X'
i_internal_tabname = 'I_SBOOK'
CHANGING
ct_fieldcat = i_fieldcatalog
EXCEPTIONS
inconsistent_interface = 1
program_error = 2
OTHERS = 3.
IF sy-subrc <> 0.
ENDIF.
wa_layout-cwidth_opt = 'X'.
ENDMETHOD.
METHOD top_of_page.
DATA: text TYPE sdydo_text_element,
background_id TYPE sdydo_key VALUE 'ALV_BACKGROUND'.
text = 'Top of Page'.
CALL METHOD oref_doc->add_text
EXPORTING
text = text
sap_color = cl_dd_document=>list_positive
sap_fontsize = cl_dd_document=>large.
oref_doc->new_line( ).
text = 'Line1'.
CALL METHOD oref_doc->add_text
EXPORTING
text = text.
CREATE OBJECT oref_html
EXPORTING
parent = container1
EXCEPTIONS
cntl_error = 1
cntl_install_error = 2
dp_install_error = 3
dp_error = 4
OTHERS = 5.
IF sy-subrc <> 0.
ENDIF.
oref_doc->html_control = oref_html.
CALL FUNCTION 'REUSE_ALV_GRID_COMMENTARY_SET'
EXPORTING
document = oref_doc
bottom = space.
CALL METHOD oref_doc->merge_document.
CALL METHOD oref_doc->set_document_background
EXPORTING
picture_id = background_id.
CALL METHOD oref_doc->display_document
EXPORTING
reuse_control = 'X'
parent = container1
EXCEPTIONS
html_display_error = 1
OTHERS = 2.
IF sy-subrc <> 0.
ENDIF.
ENDMETHOD.
METHOD display.
SET HANDLER me->top_of_page FOR oref_alv.
SET HANDLER me->print_top_of_page FOR oref_alv.
CALL METHOD oref_alv->set_table_for_first_display
EXPORTING
is_layout = wa_layout
CHANGING
it_outtab = i_sbook
it_fieldcatalog = i_fieldcatalog
EXCEPTIONS
invalid_parameter_combination = 1
program_error = 2
too_many_lines = 3
OTHERS = 4.
IF sy-subrc <> 0.
ENDIF.
CALL METHOD oref_doc->initialize_document
.
CALL METHOD oref_alv->list_processing_events
EXPORTING
i_event_name = 'TOP_OF_PAGE'
i_dyndoc_id = oref_doc.
CALL SCREEN 0100.
ENDMETHOD.
METHOD print_top_of_page.
WRITE:/5 'Print top of page' COLOR 5 INTENSIFIED OFF.
WRITE:/5 'Line1'.
ENDMETHOD.
ENDCLASS.
DATA: oref_main TYPE REF TO cl_main.
DATA:ok_code TYPE syucomm.
START-OF-SELECTION.
CREATE OBJECT oref_main.
oref_main->get_data( ).
oref_main->populate_fc_layout( ).
END-OF-SELECTION.
oref_main->display( ).
MODULE status_0100 OUTPUT.
SET PF-STATUS '0100'.
ENDMODULE.
MODULE user_command_0100 INPUT.
CASE ok_code.
WHEN 'BACK'.
SET SCREEN 00.
LEAVE SCREEN.
ENDCASE.
ENDMODULE.
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In the traffic Signal, you have overlooked the condition that there may be a possible division by zero that may result in a runtime error.
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