对于WDA来说，常用的搜索帮助有OVS，标准SH，Interface view等。今天来说说两种常用的OVS的使用：
一：普通字段，表字段的搜索帮助（在创建节点的时候指定搜索帮助OVS，或者后面加上去）
1.创建WDA程序，双击程序组件，在使用组件界面添加OVS组件，如下图：
OVS组件名可随意定义，组件选择WDR_OVS,保存激活整个程序。
2.在需要使用的视图中，添加步骤1中定义的OVS组件：双击视图，在视图属性页签，点击新建将1中的组件添加进视图中。
定义的OVS会生成两个组件都添加进视图
3.将定义的OVS组件添加到节点属性字段的搜索帮助，如下图：
4.为OVS事件定义方法：
输入方法名，选择事件类型EVENT，在事件里F4选择前面定义的OVS事件
5.代码实现OVS搜索帮助：
method ON_OVS_OWNER .
types:
begin of lty_stru_input,"定义查询参数结构
CODEGRUPPE type QCODEGRP,
end of lty_stru_input.
types:
begin of lty_stru_list,"定义搜搜帮助返回结果字段列表
CODEGRUPPE type QCODEGRP,
CODE type QCODE,
KURZTEXT type QTXT_CODE,
GROUPTEXT type QKTEXTGR,
end of lty_stru_list. data: ls_search_input type lty_stru_input,
ls_select_list type lty_stru_list,
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. DATA: ls_ORDER_QCODE type ZV_ORDER_QCODE,
lt_ORDER_QCODE type table of ZV_ORDER_QCODE. field-symbols: <ls_query_params> type lty_stru_input,
<ls_selection> type lty_stru_list. DATA lo_nd_l_so_header_n TYPE REF TO if_wd_context_node. DATA lo_el_l_so_header_n TYPE REF TO if_wd_context_element.
DATA ls_l_so_header_n TYPE wd_this->Element_l_so_header_n.
DATA lv_symptoms_code_g TYPE wd_this->Element_l_so_header_n-symptoms_code_g. lo_nd_l_so_header_n = wd_context->get_child_node( name = wd_this->wdctx_l_so_header_n ).
lo_el_l_so_header_n = lo_nd_l_so_header_n->get_element( ).
lo_el_l_so_header_n->get_attribute(
EXPORTING
name = `SYMPTOMS_CODE_G`
IMPORTING
value = lv_symptoms_code_g ). case ovs_callback_object->phase_indicator.
when if_wd_ovs=>co_phase_0.
lv_window_title = 'Choice Symptoms Code:'.
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 =
row_count = ). when if_wd_ovs=>co_phase_1. when if_wd_ovs=>co_phase_2.
select * into corresponding fields of table lt_ORDER_QCODE
from ZV_ORDER_QCODE
where KATALOGART = 'Z1'
and CODEGRUPPE = lv_symptoms_code_g
AND SPRACHE = SY-LANGU."ADD DEFAULT LANGU BY LY 20170113 . clear: lt_select_list. loop at lt_ORDER_QCODE into ls_ORDER_QCODE.
ls_select_list-CODEGRUPPE = ls_ORDER_QCODE-CODEGRUPPE.
ls_select_list-GROUPTEXT = ls_ORDER_QCODE-GROUPTEXT.
ls_select_list-CODE = ls_ORDER_QCODE-CODE.
ls_select_list-KURZTEXT = ls_ORDER_QCODE-KURZTEXT. append ls_select_list to lt_select_list.
endloop.
ovs_callback_object->set_output_table( output = lt_select_list ). when if_wd_ovs=>co_phase_3.
if ovs_callback_object->selection is not bound.
endif. assign ovs_callback_object->selection->* to <ls_selection>.
if <ls_selection> is assigned."返回选择结果，可返回多个字段
ovs_callback_object->context_element->set_attribute(
name = `SYMPTOMS_CODE`
value = <ls_selection>-CODE ).
endif.
endcase.endmethod.
二、select option中设置OVS
不同的是需要在SELECT OPTION中添加OVS对象：
METHOD init_select_options .
DATA:
lt_range_table TYPE REF TO data,
rt_range_table TYPE REF TO data,
read_only TYPE abap_bool,
typename TYPE string,
lv_value TYPE string.
DATA:
lr_componentcontroller TYPE REF TO ig_componentcontroller,
l_ref_cmp_usage TYPE REF TO if_wd_component_usage.
DATA:
display_btn_cancel TYPE abap_bool,
display_btn_check TYPE abap_bool,
display_btn_reset TYPE abap_bool,
display_btn_execute TYPE abap_bool.
DATA:gt_value_set TYPE wdy_key_value_table,
gw_value_set TYPE wdy_key_value,
gt_type TYPE TABLE OF crmc_proc_type_t,
gw_type LIKE LINE OF gt_type.* create the used component
l_ref_cmp_usage = wd_this->wd_cpuse_selection( ).
IF l_ref_cmp_usage->has_active_component( ) IS INITIAL.
l_ref_cmp_usage->create_component( ).
ENDIF.
* get a pointer to the interface controller of the select options
*component
wd_this->m_wd_select_options = wd_this->wd_cpifc_selection( ).* init the select screen
wd_this->m_handler =
wd_this->m_wd_select_options->init_selection_screen( ). "sales_org
* create a range table that consists of this new data element
lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'CRMT_SALES_ORG' ).
* add a new field to the selection
wd_this->m_handler->add_selection_field(
i_id = 'SALES_ORG'
it_result = lt_range_table
i_read_only = read_only ).* create a range table that consists of this new data element
lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'CRMT_OBJECT_ID_DB' ).
* add a new field to the selection
wd_this->m_handler->add_selection_field(
i_id = 'OBJECT_ID'
it_result = lt_range_table
i_read_only = read_only ).* create a range table PROCESS TYPE
lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'CRMT_PROCESS_TYPE' ).
"ADD DEFAULT VALUE SET
SELECT * INTO TABLE gt_type FROM crmc_proc_type_t
WHERE process_type IN ('ZSO2','ZSO3','ZSO5')
AND langu = sy-langu.
LOOP AT gt_type INTO gw_type.
gw_value_set-key = gw_type-process_type.
gw_value_set-value = gw_type-p_description.
APPEND gw_value_set TO gt_value_set.
ENDLOOP.
* add a new field to the selection
wd_this->m_handler->add_selection_field(
i_id = 'PROCESS_TYPE'
it_result = lt_range_table
it_value_set = gt_value_set
i_read_only = read_only ).* create a range table that consists of this new data element
lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'BU_PARTNER' ).
* add a new field to the selection
wd_this->m_handler->add_selection_field(
i_id = 'PARTNER'
it_result = lt_range_table
i_read_only = read_only ).* create a range table that consists of this new data element
lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'CRMT_POSTING_DATE' ).
* add a new field to the selection
wd_this->m_handler->add_selection_field(
i_id = 'POSTING_DATE'
i_description = lv_value
it_result = lt_range_table
i_read_only = read_only ).* create a range table that consists of this new data element
lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'CRM_J_STATUS' ).
* add a new field to the selection
wd_this->m_handler->add_selection_field(
i_id = 'STAT'
it_result = lt_range_table
i_value_help_type = 'OVR'
i_value_help_id = 'OVS'
i_read_only = read_only ).*End add
* adjust the global options
wd_this->m_handler->set_global_options(
i_display_btn_cancel = display_btn_cancel
i_display_btn_check = display_btn_check
i_display_btn_reset = display_btn_reset
i_display_btn_execute = display_btn_execute ).ENDMETHOD.
然后就与前面相同：
METHOD ovs .
CHECK i_ovs_data-m_selection_field_id EQ 'STAT'. TYPES:
BEGIN OF lty_stru_input,
stsma TYPE j_stsma, "搜索条件
estat TYPE j_estat,
txt30 TYPE j_txt30,
END OF lty_stru_input.
TYPES:
BEGIN OF lty_stru_list,
* add fields for the selection list here
stsma TYPE j_stsma, "搜索条件
estat TYPE j_estat,
txt04 TYPE j_txt04,
txt30 TYPE j_txt30,
END OF lty_stru_list. DATA: ls_search_input TYPE lty_stru_input,
lt_select_list TYPE STANDARD TABLE OF lty_stru_list,
ls_select_list TYPE 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,
gt_tj30t TYPE TABLE OF tj30t,
gw_tj30t LIKE LINE OF gt_tj30t. FIELD-SYMBOLS: <ls_query_params> TYPE lty_stru_input,
<ls_selection> TYPE lty_stru_list. CASE i_ovs_data-m_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 = `STSMA`. "must match a field name of search
ls_text-value = `Status Profile`. "wd_assist->get_text( `001` ).
INSERT ls_text INTO TABLE lt_label_texts. ls_text-name = `ESTAT`. "must match a field name of search
ls_text-value = `User Status`. "wd_assist->get_text( `001` ).
INSERT ls_text INTO TABLE lt_label_texts. ls_text-name = `TXT30`. "must match a field name of search
ls_text-value = `Object status`. "wd_assist->get_text( `001` ).
INSERT ls_text INTO TABLE lt_label_texts. ls_text-name = `STSMA`. "must match a field in list structure
ls_text-value = `Status Profile`. "wd_assist->get_text( `002` ).
INSERT ls_text INTO TABLE lt_column_texts. ls_text-name = `ESTAT`. "must match a field in list structure
ls_text-value = `User Status`. "wd_assist->get_text( `002` ).
INSERT ls_text INTO TABLE lt_column_texts. ls_text-name = `TXT04`. "must match a field in list structure
ls_text-value = `Individual status of an object`. "wd_assist->get_text( `002` ).
INSERT ls_text INTO TABLE lt_column_texts. ls_text-name = `TXT30`. "must match a field in list structure
ls_text-value = `Object status`. "wd_assist->get_text( `002` ).
INSERT ls_text INTO TABLE lt_column_texts.* lv_window_title = wd_assist->get_text( `003` ).
* lv_group_header = wd_assist->get_text( `004` ).
* lv_table_header = wd_assist->get_text( `005` ). i_ovs_data-m_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 =
row_count = ). 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. i_ovs_data-m_ovs_callback_object->context_element->get_static_attributes(
IMPORTING static_attributes = ls_search_input ).
* pass the values to the OVS component
i_ovs_data-m_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 i_ovs_data-m_ovs_callback_object->query_parameters IS NOT BOUND.
******** TODO exception handling
ENDIF.
ASSIGN i_ovs_data-m_ovs_callback_object->query_parameters->*
TO <ls_query_params>.
IF NOT <ls_query_params> IS ASSIGNED.
******** TODO exception handling
ENDIF. REFRESH:gt_tj30t.
DATA: rt_object_id TYPE REF TO data.
DATA:gt_file TYPE TABLE OF crmc_proc_type,
gw_file LIKE LINE OF gt_file.
FIELD-SYMBOLS: <process_type> TYPE table.
rt_object_id = wd_this->m_handler->get_range_table_of_sel_field( i_id = 'PROCESS_TYPE' ).
ASSIGN rt_object_id->* TO <process_type>.
IF <process_type> IS ASSIGNED.
SELECT * INTO TABLE gt_file FROM crmc_proc_type
WHERE process_type IN <process_type>
AND process_type IN ('ZSO2','ZSO3','ZSO5').
ELSE.
SELECT * INTO TABLE gt_file FROM crmc_proc_type WHERE process_type IN ('ZSO2','ZSO3','ZSO5').
ENDIF.
IF gt_file IS NOT INITIAL.
SELECT * INTO CORRESPONDING FIELDS OF TABLE lt_select_list
FROM tj30t FOR ALL ENTRIES IN gt_file WHERE stsma = gt_file-user_stat_proc
AND spras = sy-langu.
ENDIF.* call business logic for a table of possible values
* lt_select_list = ??? i_ovs_data-m_ovs_callback_object->set_output_table( output = lt_select_list ). WHEN if_wd_ovs=>co_phase_3.
* apply result
FIELD-SYMBOLS : <lt_sel_opt_result> TYPE STANDARD TABLE. IF i_ovs_data-m_ovs_callback_object->selection IS NOT BOUND.
******** TODO exception handling
ENDIF. ASSIGN i_ovs_data-m_ovs_callback_object->selection->* TO <ls_selection>.
IF <ls_selection> IS ASSIGNED.
ASSIGN i_ovs_data-mt_selected_values->* TO <lt_sel_opt_result>.
INSERT <ls_selection>-estat INTO TABLE <lt_sel_opt_result>.
* or
* I_OVS_DATA-m_ovs_callback_object->context_element->set_static_attributes(
* static_attributes = <ls_selection> ). ENDIF.
ENDCASE.
ENDMETHOD.
