进阶：案例六: Context Menu(静态 与 动态)

实现：

1、add：

 2、delete

3、add2

实现步骤：

1、新建属性display_text

2、创建layout

3、代码部分：

add事件：

METHOD onactionadd .
  DATA: ls_disp TYPE string.
  wd_context->get_attribute(
   EXPORTING name = 'DISPLAY_TEXT'
     IMPORTING value = ls_disp ).
  CONCATENATE ls_disp 'Action1' into ls_disp.
  wd_Context->SET_ATTRIBUTE( name = 'DISPLAY_TEXT' value = ls_disp ).

ENDMETHOD.

add2事件：

method ONACTIONADD2 .
  data: ls_disp type string.
  wd_Context->get_attribute(
  EXPORTING name = 'DISPLAY_TEXT'
    IMPORTING value = ls_disp ).
  CONCATENATE ls_disp 'Action2' into ls_disp.
  wd_Context->SET_ATTRIBUTE( name = 'DISPLAY_TEXT' value = ls_disp ).
endmethod.

delete事件：

method ONACTIONDELETE .
  data: ls_disp type string.
  wd_Context->SET_ATTRIBUTE( name = 'DISPLAY_TEXT' value = space ).
endmethod.

方法WDDOONCONTEXTMENU好像没起作用

method WDDOONCONTEXTMENU .
  DATA: ls_id type string,
        lo_menu type REF TO cl_wd_menu,
        lo_menu_item type REF TO cl_wd_menu_action_item.
* get the UI element ID
  ls_id = CONTEXT_MENU_EVENT->originator->id.
* if it is the 1st UI,then assign the Cotext Menu statically
  IF ls_id = 'TEXT'.
    MENU = CONTEXT_MENU_MANAGER->get_context_menu( 'ACTION' ).
    ENDIF.
* if it is the 2nd UI,then assign the Cotext Menu programly
    IF ls_id = 'TEXT2'.
**runtime object
      lo_menu = cl_wd_menu=>new_menu( id = 'ACTION2' ).
**menu itme
      lo_menu_item = cl_wd_menu_action_item=>new_menu_action_item(
      id = 'ADD2'
      on_action = 'ADD2'
      text = 'Action2-Add2' ).
**add this item to menu
      lo_menu->add_item( lo_menu_item ).
**menu itme
      lo_menu_item = cl_wd_menu_action_item=>new_menu_action_item(
      id = 'DELETE2'
      on_action = 'DELETE'
      text = 'Action2-DELETE2' ).
**add this item to menu
      lo_menu->add_item( lo_menu_item ).
**return the menu
      MENU = lo_menu.
      ENDIF.
endmethod.