How to disable a input field in OVS search

Question

Hi friends,
I have crated a OVS search help for matnr.
i have two input field like matnr and mat desc.. user can enter any value and hit SEARCH..
im getting results.
Now i want to hardoced a value of matnr = 001.. and make this field read only..
how can we do it..
i just took a example of matnr and mat desc. to make u understand easily...
kindly help.
Niraja

Answer 1

Hi Niraja,
You can initialize the value for MATNR in the phase 1 of the eventhandler method for OVS. Try refer the code segment below. Am initializing the values for MATNR & MAKTX fields in the lines:
ls_search_input-matnr = 'D*'.
ls_search_input-maktx = '*'.
*     pass the values to the OVS component
      ovs_callback_object->set_input_structure(
          input = ls_search_input ).
Regards,
Uday
Below is the complete code from my eventhandler method:
method ON_OVS .
" declare data structures for the fields to be displayed and for the table columns of the selection list
  types:
    begin of lty_stru_input,
"   add fields for the display of your search input here
      matnr type string,
      maktx type string,
    end of lty_stru_input.
  types:
    begin of lty_stru_list,
"   add fields for the selection list here
      matnr type string,
      maktx type string,
    end of lty_stru_list.
  data: ls_search_input  type lty_stru_input,
        lt_select_list   type standard table of lty_stru_list,
        ls_text          type wdr_name_value,
        lt_label_texts   type wdr_name_value_list,
        lt_column_texts  type wdr_name_value_list,
        lv_window_title  type string,
        lv_group_header  type string,
        lv_table_header  type string.
  field-symbols: <ls_query_params> type lty_stru_input,
                 <ls_selection>    type lty_stru_list.
  data: lv_matnr type mara-matnr,
        lv_maktx type makt-maktx.
  case ovs_callback_object->phase_indicator.
    when if_wd_ovs=>co_phase_0.  "configuration phase, may be omitted
" in this phase you have the possibility to define the texts,  if you don't want to use the defaults (DDIC-texts)
      ls_text-name  = `MATNR`.  "must match a field name of search
      ls_text-value = `Material Number`. "wd_assist->get_text( `001` ).
      insert ls_text into table lt_label_texts.
      ls_text-name  = `MAKTX`.
      ls_text-value = `Material Description`.
      insert ls_text into table lt_label_texts.
      ls_text-name = `MATNR`.  "must match a field in list structure
      ls_text-value = `Col1 -> Material Number`. "wd_assist->get_text( `002` ).
      insert ls_text into table lt_column_texts.
      ls_text-name = `MAKTX`.  "must match a field in list structure
      ls_text-value = `Col2 -> Material Description`. "wd_assist->get_text( `002` ).
      insert ls_text into table lt_column_texts.
      ovs_callback_object->set_configuration(
                label_texts  = lt_label_texts
                column_texts = lt_column_texts
                group_header = lv_group_header
                window_title = lv_window_title
                table_header = lv_table_header
                col_count    = 2
                row_count    = 10 ).
    when if_wd_ovs=>co_phase_1.  "set search structure and defaults
" In this phase you can set the structure and default values of the search structure. If this phase is omitted, " the search fields will not be displayed, but the selection table is displayed directly.
" Read values of the original context (not necessary, but you may set these as the defaults). A reference to " the context element is available in the callback object.
      ovs_callback_object->context_element->get_static_attributes
                                           ( importing static_attributes = ls_search_input ).
" Setting the default values to be displayed in the selection screen
    ls_search_input-matnr = 'D*'.
    ls_search_input-maktx = '*'.
"     pass the values to the OVS component
      ovs_callback_object->set_input_structure( input = ls_search_input ).
    when if_wd_ovs=>co_phase_2.
"  If phase 1 is implemented, use the field input for the selection of the table
"  If phase 1 is omitted, use values from your own context.
      assign ovs_callback_object->query_parameters->*
                              to <ls_query_params>.
      lv_matnr = <ls_query_params>-matnr.
      lv_maktx = <ls_query_params>-maktx.
replace all occurences of: '*' in lv_matnr with '%',
                           '*' in lv_maktx with '%'.
select a~matnr
       b~maktx into corresponding fields of table lt_select_list up to 10 rows
                 from mara  as a inner join
                 makt as b on a~matnr = b~matnr where
                 ( a~matnr like lv_matnr and b~maktx like lv_maktx and b~spras = 'EN' ).
"     call business logic for a table of possible values
"     lt_select_list = ???
      ovs_callback_object->set_output_table( output = lt_select_list ).
    when if_wd_ovs=>co_phase_3.
"   apply result
      assign ovs_callback_object->selection->* to <ls_selection>.
      if <ls_selection> is assigned.
        ovs_callback_object->context_element->set_attribute(
                               name  = `MATNR`
                               value = <ls_selection>-MATNR ).
        concatenate 'Description from MAKT:'
                    <ls_selection>-MAKTX
                    into <ls_selection>-MAKTX separated by space.
        ovs_callback_object->context_element->set_attribute(
                               name  = `MAKTX`
                               value = <ls_selection>-MAKTX ).
      endif.
  endcase.
endmethod.