WDA学习（8）：Select Options OVS

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1.9 Select Options && OVS

本实例展示如何使用Select Options结合OVS(Object Value Selector)使用。

1.创建Web Dynpro Component

Name:Z_TEST_WDA3

Window Name:Z_TEST_WDA3

View Name:MAIN

2.Component Usage使用Select Options

选择Web Dynpro Comp.添加Component Use

3.设置MAIN视图组件

Layout页签：

创建Group类型视图控件Group1,设置CAPTION的text属性；

创建ViewContainerUIElement类型视图控件View1,用来显示Select Options的容器；

Properties页签：

创建Select Options使用组件参数。

Attributes页签：

创建参数M_HANDLER,类型IF_WD_SELECT_OPTIONS

创建参数M_WD_SELECT_OPTIONS,类型IWCI_WDR_SELECT_OPTIONS

Methods页签：

创建Event Handler，响应OVS事件；

重写WDDONINIT方法，初始化Select Options

method WDDOINIT.DATA:LT_RANGE_TABLE TYPE REF TO DATA.DATA:LR_VALUE TYPE REF TO DATA.FIELD-SYMBOLS: <FS_DATE> TYPE SFLIGHT-FLDATE."Component Usage对应接口DATA:L_REF_CMP_USAGE TYPE REF TO IF_WD_COMPONENT_USAGE.* create the used componentL_REF_CMP_USAGE = WD_THIS->WD_CPUSE_SELECT_OPTIONS( ).IF L_REF_CMP_USAGE->HAS_ACTIVE_COMPONENT( ) IS INITIAL.L_REF_CMP_USAGE->CREATE_COMPONENT( ).ENDIF."select Options接口WD_THIS->M_WD_SELECT_OPTIONS = WD_THIS->WD_CPIFC_SELECT_OPTIONS( )."init the select screenWD_THIS->M_HANDLER = WD_THIS->M_WD_SELECT_OPTIONS->INIT_SELECTION_SCREEN( )."Set the Global options"是否显示cancel,check,reset,execute按钮WD_THIS->M_HANDLER->SET_GLOBAL_OPTIONS(I_DISPLAY_BTN_CANCEL = ABAP_FALSEI_DISPLAY_BTN_CHECK   = ABAP_FALSEI_DISPLAY_BTN_RESET   = ABAP_FALSEI_DISPLAY_BTN_EXECUTE = ABAP_FALSE )."设置select option字段"1.创建对应range table;2.将range table设置到select option;"调用CREATE_RANGE_TABLE方法,创建range tableLT_RANGE_TABLE = WD_THIS->M_HANDLER->CREATE_RANGE_TABLE(I_TYPENAME = 'S_CARR_ID' )."add a new field to the selection"ADD_SELECTION_FIELD方法添加字段到select option"I_VALUE_HELP_STRUCTURE,I_VALUE_HELP_STRUCTURE_FIELD,设置对应数据库表,字段"I_ID = 'S_CARR_ID' 设置字段对应id"I_READ_ONLY设置字段是否只读 abap_boolean"IT_RESULT 设置select option字段对应内表"I_OBLIGATORY 设置是否必输abap_boolean"I_DESCRIPTION 设置描述WD_THIS->M_HANDLER->ADD_SELECTION_FIELD(I_ID = 'S_CARR_ID'I_VALUE_HELP_STRUCTURE = 'SFLIGHT'I_VALUE_HELP_STRUCTURE_FIELD = 'CARRID'IT_RESULT = LT_RANGE_TABLEI_READ_ONLY = abap_false )."plane type使用ovs帮助方式"创建range tableLT_RANGE_TABLE = WD_THIS->M_HANDLER->CREATE_RANGE_TABLE(I_TYPENAME = 'S_PLANETYE' )."将字段加入select option"I_VALUE_HELP_TYPE 指定IF_WD_VALUE_HELP_HANDLER=>CO_PREFIX_OVS"使用ovs帮助WD_THIS->M_HANDLER->ADD_SELECTION_FIELD(I_ID = 'S_PLANETYE'I_VALUE_HELP_TYPE = IF_WD_VALUE_HELP_HANDLER=>CO_PREFIX_OVSIT_RESULT = LT_RANGE_TABLEI_READ_ONLY = abap_false )."ADD_PARAMETER_FIELD方法创建单个输入参数CREATE DATA LR_VALUE TYPE SFLIGHT-FLDATE.WD_THIS->M_HANDLER->ADD_PARAMETER_FIELD(I_ID = 'DATE'I_DESCRIPTION = 'select date'I_VALUE_HELP_STRUCTURE = 'SFLIGHT'I_VALUE_HELP_STRUCTURE_FIELD = 'FLDATE'I_OBLIGATORY = ABAP_TRUEI_VALUE = LR_VALUE ).endmethod.

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实现ON_OVSSEL方法：

method ON_OVSSEL .TYPES:T_FLIGHT TYPE TABLE OF SFLIGHT.DATA:LT_SFLIGHT TYPE TABLE OF SFLIGHT,WA_SFLIGHT LIKE LINE OF LT_SFLIGHT.DATA:gs_where TYPE C LENGTH 72.DATA:gt_where LIKE TABLE OF gs_where.DATA:l_line TYPE I.FIELD-SYMBOLS:<LT_OVS_RESULT> TYPE T_FLIGHT,<WA_OVS_RESULT> LIKE LINE OF <LT_OVS_RESULT>,<WA_QUERY> LIKE LINE OF <LT_OVS_RESULT>,<LT_SEL_OPT_RESULT> TYPE STANDARD TABLE,<FIELD> TYPE DATA."ovs帮助，回调方法,ovs组件会多次触发回调方法IF I_OVS_DATA-M_SELECTION_FIELD_ID = 'S_PLANETYE'.CASE I_OVS_DATA-M_OVS_CALLBACK_OBJECT->PHASE_INDICATOR."阶段0：配置ovs组件."M_OVS_CALLBACK_OBJECT是IF_WD_OVS接口对象"提供SET_CONFIGURATION方法"TABLE_MULTI_SELECT：设置是否多行选择,abap_boolean"WINDOW_TITLE:设置窗口标题"LABEL_TEXTS:文本标签，WDR_NAME_VALUE_LIST"COLUMN_TEXTS:列文本，WDR_NAME_VALUE_LIST"TABLE_HEADER:结果table头WHEN IF_WD_OVS=>CO_PHASE_0.I_OVS_DATA-M_OVS_CALLBACK_OBJECT->SET_CONFIGURATION(TABLE_MULTI_SELECT = ABAP_TRUE )."阶段1:the structure of the selection fields to be displayed must be defined in this phase"使用SET_INPUT_STRUCTURE方法"INPUT,定义selection的表结构"LABEL_TEXTS,文本标签，WDR_NAME_VALUE_LIST"WINDOW_TITLE:设置窗口标题WHEN IF_WD_OVS=>CO_PHASE_1.I_OVS_DATA-M_OVS_CALLBACK_OBJECT->SET_INPUT_STRUCTURE(INPUT = WA_SFLIGHT )."阶段2:获取帮助table值"使用参数QUERY_PARAMETERS，获取用户筛选条件"使用SET_OUTPUT_TABLE设置显示筛选结果WHEN IF_WD_OVS=>CO_PHASE_2."根据用户筛选条件，筛选结果ASSIGN I_OVS_DATA-M_OVS_CALLBACK_OBJECT->QUERY_PARAMETERS->* TO  <WA_QUERY>.IF <WA_QUERY>-carrid IS NOT INITIAL.gs_where = 'CARRID = ' && ' ''' && <WA_QUERY>-carrid && ''''.APPEND gs_where TO gt_where.gs_where = ' AND'.APPEND gs_where TO gt_where.ENDIF.IF <WA_QUERY>-connid IS NOT INITIAL.gs_where = 'CONNID = ' && ' ''' && <WA_QUERY>-connid && ''''.APPEND gs_where TO gt_where.gs_where = ' AND'.APPEND gs_where TO gt_where.ENDIF."去掉最后一条and记录DESCRIBE TABLE gt_where LINES l_line.LOOP AT gt_where INTO gs_where.IF sy-tabix = l_line AND gs_where = ' AND'.DELETE gt_where INDEX l_line.ENDIF.ENDLOOP."根据条件动态查询SELECT * FROM SFLIGHT INTO CORRESPONDING FIELDS OF TABLE LT_SFLIGHT WHERE (gt_where).I_OVS_DATA-M_OVS_CALLBACK_OBJECT->SET_OUTPUT_TABLE(OUTPUT = LT_SFLIGHT )."阶段3：The result of the search was displayed in the results view of the OVS component."SELECTION参数获取选择的结果集WHEN IF_WD_OVS=>CO_PHASE_3."获取选择结果ASSIGN I_OVS_DATA-M_OVS_CALLBACK_OBJECT->SELECTION->* TO <LT_OVS_RESULT>."mt_selected_values，保存选择后数据，显示在Select Options页面ASSIGN I_OVS_DATA-MT_SELECTED_VALUES->* TO <LT_SEL_OPT_RESULT>."处理选择结果LOOP AT <LT_OVS_RESULT> ASSIGNING <WA_OVS_RESULT>.ASSIGN COMPONENT 'PLANETYPE' OF STRUCTURE <WA_OVS_RESULT> TO <FIELD>.INSERT <FIELD> INTO TABLE <LT_SEL_OPT_RESULT>.ENDLOOP.ENDCASE.ENDIF.
endmethod.

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4.设置Window窗口

嵌入视图组件，选择VIEW1->右键->Embed