WDA基础四：Select-option的使用

select option是方便用户和数据处理的，就是丑了点。。。

前面使用的input直接做查询条件有哥弊端，就是查询的时候需要判断字段是否有选择条件，然后要将选择条件做成range table。。。有点麻烦

1.select options 组件引入WDA程序

保存，激活。

2.将组件加入使用的视图中

双击视图，选择属性页签，在使用组件表格中点击创建，将组件对应的两个列表加进来

3.在视图的INIT中，初始化SELECT OPTIONS

3.1在视图的Attributes页签中，添加组件对象

GD_HANDLE   typr ref to IF_WD_SELECT_OPTIONS.

3.2在init中初始化

DATA:LO_CP_USAGE  TYPE REF TO IF_WD_COMPONENT_USAGE,
       LO_SELECT_OP TYPE REF TO IWCI_WDR_SELECT_OPTIONS,
       LT_RANGE     TYPE REF TO DATA.

  "get the component usage
  LO_CP_USAGE = WD_THIS->WD_CPUSE_SELECT_OPTION( ).
  IF LO_CP_USAGE->HAS_ACTIVE_COMPONENT( ) IS INITIAL.
    LO_CP_USAGE->CREATE_COMPONENT( ).
  ENDIF.
  "get the select option usage
  LO_SELECT_OP = WD_THIS->WD_CPIFC_SELECT_OPTION( ).

  "init the select option
  WD_THIS->GD_HANDLE = LO_SELECT_OP->INIT_SELECTION_SCREEN( ).
  WD_THIS->GD_HANDLE->SET_GLOBAL_OPTIONS(
                                        I_DISPLAY_BTN_CANCEL = ABAP_FALSE
                                        I_DISPLAY_BTN_CHECK = ABAP_FALSE
                                        I_DISPLAY_BTN_RESET = ABAP_FALSE
                                        I_DISPLAY_BTN_EXECUTE = ABAP_FALSE ).
  "CREATE ONE RANGE TABLE
*  LT_RANGE = WD_THIS->GGD_HANDLE->CREATE_RANGE_TABLE(  ).
  CALL METHOD WD_THIS->GD_HANDLE->CREATE_RANGE_TABLE
    EXPORTING
      I_TYPENAME     = 'BU_PARTNER'
    RECEIVING
      RT_RANGE_TABLE = WD_THIS->RANGE. "LT_RANGE.
  CALL METHOD WD_THIS->GD_HANDLE->ADD_SELECTION_FIELD
    EXPORTING
      I_ID          = 'PARTNER'
*     I_WITHIN_BLOCK        = MC_ID_MAIN_BLOCK
      I_DESCRIPTION = 'Partner'
*     I_IS_AUTO_DESCRIPTION = ABAP_TRUE
      IT_RESULT     = WD_THIS->RANGE "LT_RANGE
*     I_OBLIGATORY  = ABAP_FALSE  "必输
*     I_COMPLEX_RESTRICTIONS       =
*     I_USE_COMPLEX_RESTRICTION    = ABAP_FALSE
*     I_NO_COMPLEX_RESTRICTIONS    = ABAP_FALSE
*     I_VALUE_HELP_TYPE     = IF_WD_VALUE_HELP_HANDLER=>CO_PREFIX_NONE
*     I_VALUE_HELP_ID       =
*     I_VALUE_HELP_MODE     =
*     I_VALUE_HELP_STRUCTURE       =
*     I_VALUE_HELP_STRUCTURE_FIELD =
*     I_HELP_REQUEST_HANDLER       =
*     I_LOWER_CASE  =
*     I_MEMORY_ID   =
*     I_NO_EXTENSION        = ABAP_FALSE
*     I_NO_INTERVALS        = ABAP_FALSE
*     I_AS_CHECKBOX = ABAP_FALSE
*     I_AS_DROPDOWN = ABAP_FALSE
*     IT_VALUE_SET  =
*     I_READ_ONLY   = ABAP_FALSE
*     I_DONT_CARE_VALUE     =
*     I_EXPLANATION =
*     I_TOOLTIP     =
*     I_IS_NULLABLE = ABAP_TRUE
*     I_FORMAT_PROPERTIES   =
*     I_SUGGEST_VALUES      =
*     I_SUGGEST_FILTER_METHOD      =
    .

效果：

4.在查询得时候取值(其他代码已删除，仅取得RANGE table得代码)

METHOD ONACTIONSEARCH .
DATA:RT_RANGE TYPE REF TO DATA.
  FIELD-SYMBOLS:<FS> TYPE TABLE.

  RT_RANGE = WD_THIS->GD_HANDLE->GET_RANGE_TABLE_OF_SEL_FIELD( I_ID = 'PARTNER' )."此处ID对应上面INIT中的ID
  ASSIGN RT_RANGE->* TO <FS>.
ENDMETHOD.

5.在窗口中将SELECT-OPTION组件嵌套视图