How to add checkbox in ALV OO?

Question

how to change editable mode and able to input???
REPORT  ZZ_ALV_TEST.
data:
      ispfli type table of spfli.
data: gr_table type ref to cl_salv_table.
data: gr_functions type ref to cl_salv_functions.
data: gr_display type ref to cl_salv_display_settings.
DATA: GR_COLUMNS TYPE REF TO CL_SALV_COLUMNS_TABLE,
      GR_COLUMN  TYPE REF TO CL_SALV_COLUMN_TABLE.
start-of-selection.
select * into table ispfli from spfli.
cl_salv_table=>factory( importing r_salv_table = gr_table changing
t_table = ispfli ).
gr_functions = gr_table->get_functions( ).
gr_functions->set_all( abap_true ).
GR_COLUMNS = GR_TABLE->GET_COLUMNS( ).
  TRY.
      GR_COLUMN ?= GR_COLUMNS->GET_COLUMN( 'CARRID' ). "Column which you
* want to make checkbox
      GR_COLUMN->SET_CELL_TYPE( 1 ).
    CATCH CX_SALV_NOT_FOUND.
  ENDTRY.
gr_table->display( ).

Answer 1

I understand the CARRID column is not a checkbox, so you might mean something else entirely. If all you need is to toogle a checkbox value on click, then
- first make the checkbox a hotspot
gr_column->set_cell_type(  if_salv_c_cell_type=>checkbox_hotspot ). " constant value 6
- implement a handler to the hotspot event
DATA gr_events TYPE REF TO cl_salv_events_table.
    gr_events = gr_table->get_event( ).
    SET HANDLER ??->handle_hotspot_click FOR gr_events.
- Your handler must toogle the checkbox value and refresh the display, something like
    METHOD handle_hotspot_click.
    FIELD-SYMBOLS <ls_item> TYPE spfli.
    READ TABLE ispfli INDEX row ASSIGNING <ls_item>.
    CHECK sy-subrc EQ 0.
    CASE column.
      WHEN 'CARRID'.  " your checkbox column
*       Toogle Value
        IF <ls_item>-carrid EQ 'X'.
          <ls_item>-carridl = space.
         ELSE.
          <ls_item>-carrid = 'X'.
        ENDIF.
        gr_table->refresh( ).
    ENDCASE.
  ENDMETHOD.
J.N.N