Changing fields color in CL_GUI_ALV_GRID using class

Question

Hi,
I've written a lot of posts but still I have problem with changing color for CL_GUI_ALV_GRID.
I have class ZKSL_CL_4_17_ALV_GRID_OO with 3 methods : SELECT, HANDLE_DBL_CLICK AND DISPLAY_ALV
I want to change fields color every time I double click on IT.
METHOD SELECT.
   DATA:
         lt_sflight                TYPE TABLE OF           zkslt_sflight,
         ls_layout                 TYPE                    lvc_s_layo,
         lr_custom_container       TYPE REF TO             cl_gui_custom_container,
         lr_my_class               TYPE REF TO             zksl_cl_4_17_alv_grid_oo.
   SELECT *  FROM zkslt_sflight  INTO TABLE mt_sflight
      WHERE carrid    = iv_carrid AND
          ( fldate    IN it_date  OR
            price     IN it_price OR
            planetype IN it_type )
CALL FUNCTION 'Z_KSL_SCREEN'.
ENDMETHOD.
from FM z_ksl_screen i call screen 400 and from status_400 output  I call method DISPLAY_ALV
METHOD display_alv.
   DATA:
          lr_custom_container       TYPE REF TO             cl_gui_custom_container,
          lt_sflight                TYPE TABLE OF           zkslt_sflight,
          lt_catalog                TYPE STANDARD TABLE OF  lvc_s_fcat,
          ls_catalog                LIKE LINE OF            lt_catalog,
          ls_layout                 type                    slis_layout_alv,
          lr_my_class               TYPE REF TO             zksl_cl_4_17_alv_grid_oo.
   CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
     EXPORTING
       i_structure_name = 'ZKSLT_SFLIGHT'
     CHANGING
       ct_fieldcat      = lt_catalog[].
************BULID LAYOUT
   ls_layout-no_input = 'X'.
   ls_layout-colwidth_optimize = 'X'.
   ls_layout-totals_text       = 'Totals(201)'.
   ls_layout-info_fieldname    = 'LINE_COLOR'.
   IF mr_gui_alv_grid IS INITIAL.  "-----------------------------------if----------------------&
     CREATE OBJECT: lr_custom_container
       EXPORTING
         container_name = 'DISPLAY',
         lr_my_class.
     CREATE OBJECT mr_gui_alv_grid
       EXPORTING
         i_parent = lr_custom_container.
     SET HANDLER lr_my_class->handle_dbl_click FOR mr_gui_alv_grid.
     CALL METHOD mr_gui_alv_grid->set_table_for_first_display
       EXPORTING
         i_structure_name = 'ZKSLT_SFLIGHT'
        is_layout        =   ls_layout
         i_save           = 'A'
       CHANGING
         it_outtab        = Mt_sflight
         it_fieldcatalog  = lt_catalog.
   ELSE.     "-------------------------------------------------ELSE---------------------&
     mr_gui_alv_grid->refresh_table_display( ) .
   ENDIF.
ENDMETHOD.
In handler i am trying to change fields color and call method display sending new out_table
CALL METHOD me->display_alv
     CHANGING
       ct_fieldcat = lt_fieldcat.
Please give me some easy advice how to do that.
thank you in advice.

Answer 1

Thank you Klaus for your reply,
The problem is that I need to make this using classes.
I tried to make my structure data with LVC_T_SCOL as you wrote,
a field of table type LVC_T_SCOL in the structure of your output table
DATA BEGIN OF lt_data. 
       INCLUDE STRUCTURE sflight.
       DATA cellcolors  TYPE lvc_t_scol .
   DATA END OF lt_data.
TYPES: BEGIN OF mtt_tab.
*         INCLUDE STRUCTURE ZKLST_sflight.  " I get error that I cannot use ref to abap dic
           INCLUDE TYPE ZKSLT_SFLIGHT.
           TYPES: cellcolors  TYPE lvc_t_scol ,
             END OF mtt_tab.
After making type mtt_tab
i declare data   lt_tab                    TYPE STANDARD TABLE OF  mtt_tab.
and when I try to copy table mt_sflight (it is atribut of calss) like below
LOOP AT mt_sflight INTO ls_mt .
*   READ TABLE lt_tab INDEX sy-tabix ASSIGNING <ls_tab>.
*   MOVE-CORRESPONDING <ls_mt> TO <ls_tab>.
*    UPDATE lt_tab FROM TABLE mt_sflight.
     MOVE-CORRESPONDING ls_mt to lt_tab.
   ENDLOOP.
I am getting error "lt_tab is not internal str or table with header"
Can you help me with this?