How to trigger code when the user clicks an ALV hotspot field? - abap

Question

I am struggling with the following issue:
I have two tables (header and items) that I want to connect them by using a hotspot and the class CL_SALV_TABLE. I managed to display the header table and set a hotspot on the column with the number of the order. I want that the second table opens as a popup window after I click once on the number field (which was my hotspot). However, I don't know how to define the event. I know how to get a popup window by using the display method of CL_SALV_TABLE, e.g., this code:
CALL METHOD cl_salv_table=>factory(
* EXPORTING
* list_display = IF_SALV_C_BOOL_SAP=>FALSE
* r_container =
* container_name =
IMPORTING
r_salv_table = o_alv
CHANGING
t_table = it_tab )
.
CATCH cx_salv_msg .
ENDTRY.
o_alv->set_screen_popup( start_column = 1
end_column = 150
start_line = 1
end_line = 30 ).
o_alv->display( ).
Any comment or help is highly appreciated. Thank you in advance!

Answer 1

Here is a minimal example to execute code when an ALV hotspot field is clicked (when any cell in the column "Book number" is clicked, a popup is displayed with a text, but you can do whatever you want of course).
What is important to remember:
METHODS on_hotspot_click FOR EVENT hotspot_click OF cl_gui_alv_grid ... : this is the method to define the code to run when the hotspot field is clicked
SET HANDLER on_hotspot_click ... : to tell the Control Framework to trigger the method when the event occurs
Code:
CLASS lcl_app DEFINITION.
PUBLIC SECTION.
METHODS constructor.
METHODS on_hotspot_click
FOR EVENT hotspot_click OF cl_gui_alv_grid
IMPORTING e_row_id e_column_id es_row_no.
DATA go_alv TYPE REF TO cl_gui_alv_grid.
DATA gt_sbook TYPE TABLE OF sbook.
ENDCLASS.
CLASS lcl_app IMPLEMENTATION.
METHOD constructor.
CREATE OBJECT go_alv EXPORTING i_parent = cl_gui_container=>screen0.
SELECT * FROM sbook INTO TABLE gt_sbook.
DATA(fieldcatalog) = VALUE lvc_t_fcat(
( fieldname = 'BOOKID' ref_table = 'SBOOK' ref_field = 'BOOKID' hotspot = 'X' ) ).
SET HANDLER on_hotspot_click FOR go_alv.
go_alv->set_table_for_first_display(
EXPORTING i_structure_name = 'SBOOK'
CHANGING it_outtab = gt_sbook it_fieldcatalog = fieldcatalog ).
ENDMETHOD.
METHOD on_hotspot_click.
READ TABLE gt_sbook INDEX es_row_no-row_id INTO DATA(ls_sbook).
IF sy-subrc = 0.
MESSAGE |click { ls_sbook-bookid } col { e_column_id-fieldname } row { es_row_no-row_id }| TYPE 'I'.
ENDIF.
ENDMETHOD.
ENDCLASS.
DATA go_app TYPE REF TO lcl_app.
PARAMETERS dummy.
AT SELECTION-SCREEN OUTPUT.
IF go_app IS NOT BOUND.
go_app = NEW lcl_app( ).
ENDIF.