ABAP WebDynpro Input Help
How to Create Input Help in WebDynpro ABAP
Input Help in WebDynpro ABAP,is 5th step duty of dynpro developer to create it.This is the most important topic in webdynpro components .What is the input help ,it is like a search help for user request in the screen field of any applications that is custom F4 help to display possible values for certain screen field .So to provide or creating input help for screen field in dynpro component .Ok now let us learn creating input help.
We can reuse existing search helps from the ABAP dictionary.However ,there are not available search helps for all data types in the system.One way of creating Input Help is to include OVS (Object Value Selection )value help,is implemented by system side effort.After enetering OVS value help for context attribute ,while the run time,The OVS component is then automatically triggered when a user presses the F4 button for a selected input field ,simultaneously ,Dialog box also created automatically on the screen.
Component WDR_OVS provides a view in which the search results can be displayed as a table. The component also contains a selection view that can be used to restrict the search value.
method dynpro_inhelp .
data: l_node type ref to if_wd_context_node,
l_data_selected type if_v_main=>element_sv_data_selected.
l_node = wd_context->get_child_node( 'SV_DATA_SELECTED' ).
l_node->get_static_attributes(
importing
static_attributes = l_data_selected ).
l_node = wd_context->get_child_node( 'Material_NODE' ).
l_node->set_attribute( name = 'OBJID'
value = l_data_selected-OBJID ).
endmethod.
OVS Help
method ON_OVS .
Declare data structures for the fields to be displayed and table columns of the selection list
types:
begin of lty_stru_input,
Add fields for the display of your search input .
Stu_Id type string,
Name type string,
end of lty_stru_input.
types:
begin of lty_stru_list,
Add fields for the selection list .
short type short_d,
stext type stext,
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: type lty_stru_input,
type lty_stru_list.
DATA : lv_short TYPE string,
lv_stext TYPE string.
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 do not want to use the defaults (DDIC-texts)
ls_text-name = `STU_ID`. "must match a field name of search
ls_text-value = `Student id`.
INSERT ls_text INTO TABLE lt_label_texts.
ls_text-name = `NAME`. "must match a field name of search
ls_text-value = `student name`.
INSERT ls_text INTO TABLE lt_label_texts.
ls_text-name = `SHORT`.
ls_text-value = `student id`.
INSERT ls_text INTO TABLE lt_column_texts.
ls_text-name = `STEXT`.
ls_text-value = `student name`.
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 = 'Job Abbreviation'
col_count = 2
row_count = 10 ).
when if_wd_ovs=>co_phase_1. "set search structure and defaults
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.
Exception Handling
endif.
assign ovs_callback_object->query_parameters->*
to .
if not is assigned.
endif.
* call business logic for a table of possible values
* lt_select_list = ???
lv_short = -Stu_Id.
lv_stext = -Name.
REPLACE ALL OCCURRENCES OF '*' IN lv_short WITH '%' .
REPLACE ALL OCCURRENCES OF '*' IN lv_stext WITH '%' .
IF lv_short NE ' ' AND lv_stext NE ' '.
SELECT short stext FROM STable INTO TABLE lt_select_list
WHERE plvar = '01' AND otype = 'C' AND langu = 'EN' AND
endda GE sy-datum AND ( short LIKE lv_short AND
stext LIKE lv_stext )
ORDER BY short ASCENDING.
ELSEIF lv_short EQ ' ' AND lv_stext NE ' '.
SELECT short stext FROM STable INTO TABLE lt_select_list
WHERE plvar = '01' AND otype = 'C' AND langu = 'EN' AND
endda GE sy-datum AND stext LIKE lv_stext
ORDER BY short ASCENDING.
ELSEIF lv_short NE ' ' AND lv_stext EQ ' '.
SELECT short stext FROM STable INTO TABLE lt_select_list
WHERE plvar = '01' AND otype = 'C' AND langu = 'EN' AND
endda GE sy-datum AND short LIKE lv_short
ORDER BY short ASCENDING.
ENDIF.
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.
Exception Handling
endif.
assign ovs_callback_object->selection->* to .
if is assigned.
ovs_callback_object->context_element->set_attribute(
name = `STU_ID`
value = -short ).
ovs_callback_object->context_element->set_attribute(
name = `NAME`
value = -stext ).
endif.
endcase.
endmethod.
From this post ,we have learnt creating the Search help or input help(F4) for webdynpro components.
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