OVS help

[Former Member]

Hi All,

I want to have OVS help for Matnr field. I have gone through the standard OVS webdynpro but unable to understand. Please give me the code for my requirement with explanation. Your response would be highly rewarded.

Regards

Swapna

[former_member402443 · Accepted solution]

Hi Swapna ,

Please find the code below regarding the OVS search help.

1.First of all Create component useage OVS_USAGE for component WDR_OVS in your application component .

2.Create controller use for component WDR_OVS in view.

3.Select input help mode u201EObject Value Selectoru201C and the OVS component usage OVS_USAGE for the context attribute MATNR.

4.Navigate to the methods tab of view and create event handler method ON_OVS for event OVS of component WDR_OVS.

and finally go thru the code mention below.

METHOD on_ovs .

TYPES:

BEGIN OF ty_selfields, "Selection fields

carrid TYPE sflight-carrid,

connid TYPE sflight-connid,

fldate TYPE sflight-fldate,

END OF ty_selfields,

BEGIN OF ty_sflight, "Columns in the results table

carrid TYPE sflight-carrid,

connid TYPE sflight-connid,

fldate TYPE sflight-fldate,

END OF ty_sflight.

DATA:

lt_text TYPE wdr_name_value_list, "Label texts

ls_text LIKE LINE OF lt_text, "Label texts

ls_selfields TYPE ty_selfields, "Selection fields

cond(72) TYPE c, "for one where clause

itab_where LIKE TABLE OF cond, "dyn. where clause tabl

lt_sflight TYPE TABLE OF ty_sflight, "Results table

node_flightinfo TYPE REF TO if_wd_context_node, "Reference to context n

elem_flightinfo TYPE REF TO if_wd_context_element. "Reference to context n

FIELD-SYMBOLS:

<query_params> TYPE ty_selfields,

<selection> TYPE ty_sflight.

CASE ovs_callback_object->phase_indicator.

WHEN ovs_callback_object->co_phase_0.

• create texts for labels

ls_text-name = 'CARRID'.

ls_text-value = 'Airline Code'.

INSERT ls_text INTO TABLE lt_text.

ls_text-name = 'CONNID'.

ls_text-value = 'Connection Code'.

INSERT ls_text INTO TABLE lt_text.

ls_text-name = 'FLDATE'.

ls_text-value = 'Flight Date'.

INSERT ls_text INTO TABLE lt_text.

• set text for window, group, labels and table header

ovs_callback_object->set_configuration(

label_texts = lt_text

group_header = 'Search for a Flight Date'

window_title = 'Value Help'

table_header = 'Flights' ).

WHEN ovs_callback_object->co_phase_1.

• navigate from <CONTEXT> to <FLIGHTINFO> via lead selection

node_flightinfo = wd_context->get_child_node( name = `FLIGHTINFO` ).

• get element via lead selection

elem_flightinfo = node_flightinfo->get_element( ).

• get attributes

elem_flightinfo->get_static_attributes( IMPORTING static_attributes = ls_selfields ).

IF ls_selfields IS INITIAL.

ls_selfields-carrid = 'LH'.

ENDIF.

• set selection fields

ovs_callback_object->set_input_structure( input = ls_selfields ).

WHEN ovs_callback_object->co_phase_2.

IF ovs_callback_object->query_parameters IS NOT BOUND.

• exception handling

ENDIF.

• get query parameters

ASSIGN ovs_callback_object->query_parameters->* TO <query_params>.

• create where condition

IF NOT <query_params>-carrid EQ ''.

CONCATENATE 'CARRID = ''' <query_params>-carrid '''' INTO cond.

APPEND cond TO itab_where.

ENDIF.

IF NOT <query_params>-connid EQ '0000'.

CONCATENATE 'CONNID = ''' <query_params>-connid '''' INTO cond.

IF <query_params>-carrid NE ''.

CONCATENATE 'AND' cond INTO cond SEPARATED BY space.

ENDIF.

APPEND cond TO itab_where.

ENDIF.

IF NOT <query_params>-fldate IS INITIAL.

CONCATENATE 'FLDATE = ''' <query_params>-fldate '''' INTO cond.

IF NOT itab_where IS INITIAL.

CONCATENATE 'AND' cond INTO cond SEPARATED BY space.

ENDIF.

APPEND cond TO itab_where.

ENDIF.

• get results table

IF itab_where IS NOT INITIAL.

SELECT * FROM sflight

INTO CORRESPONDING FIELDS OF TABLE lt_sflight

WHERE (itab_where).

ELSE.

SELECT * FROM sflight

INTO CORRESPONDING FIELDS OF TABLE lt_sflight.

ENDIF.

• set results table

ovs_callback_object->set_output_table( output = lt_sflight ).

WHEN ovs_callback_object->co_phase_3.

IF ovs_callback_object->selection IS NOT BOUND.

• TODO exception

ENDIF.

• get selection

ASSIGN ovs_callback_object->selection->* TO <selection>.

IF <selection> IS ASSIGNED.

• navigate from <CONTEXT> to <FLIGHTINFO> via lead selection

node_flightinfo = wd_context->get_child_node( name = `FLIGHTINFO` ).

• get element via lead selection

elem_flightinfo = node_flightinfo->get_element( ).

• move selection to context attribute FLDATE

elem_flightinfo->set_static_attributes(

static_attributes = <selection> ).

ENDIF.

ENDCASE.

ENDMETHOD.

I hopes it solves ur problem.

Regards

Manoj Kumar

[arjun_thakur]

Hi Swapna,

Please refer to this blog: /people/shruti.rathour/blog/2008/05/05/ovs-help-in-web-dynpro-abap

also refer the standard component WDR_TEST_OVS, in its component controller look for the method ON_OVS, the code for the OVS is given there. It will not be the same as your requirement, so please go through it and try to understand it. Look at the code, you need to write the logic to extract Matnr value in phase 2 (i.e when if_wd_ovs=>co_phase_2), get all the data in l_message_tab and use method set_output_table to display the result.

I hope it helps.

Regards

Arjun

[Former Member]

Hi Swapna,

Where you getting confuse.You no need to debug the standard component.Just try to use the functinality giving by the WDR_OVS.

Follow the steps.

1. Reuse component WDR_OVS in your component.

2. Go to the properties of view where you are implementing ovs for field matnr and click on create controller usage button then add OVS interface controller to view.

3. go to methods of view add eventhandler method and select event OVS from Interface controller.

4. Inside the methos it has 4 phases with descriptions follow accordingly.

Note:

Refer the sample component DEMO_VALUE_HELP

use phase 2 to get the data and add to selection list.

I am giving sample code to your requirement

types:

begin of lty_stru_list,

• add fields for the selection list here

• column1 type string,

matnr type matnr,

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.

case ovs_callback_object->phase_indicator.

when if_wd_ovs=>co_phase_0. "configuration phase, may be omitted

lv_window_title = 'OVS HELP FOR Material No'. " wd_assist->get_text( `003` ).

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 = 1

row_count = 20 ).

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 ).

• 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.

• if ovs_callback_object->query_parameters is not bound.

• TODO exception handling

• endif.

• assign ovs_callback_object->query_parameters->*

• to <ls_query_params>.

• if not <ls_query_params> is assigned.

• TODO exception handling

• endif.

• call business logic for a table of possible values

• lt_select_list = ???

select matnr

from mara

into table lt_select_list.

ovs_callback_object->set_output_table( output = lt_select_list ).

when if_wd_ovs=>co_phase_3.

• apply result

if ovs_callback_object->selection is not bound.

• TODO exception handling

endif.

assign ovs_callback_object->selection->* to <ls_selection>.

if <ls_selection> is assigned.

ovs_callback_object->context_element->set_attribute(

name = `A_MATNR` " Context attribute

value = <ls_selection>-matnr ).

endif.

endcase.