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[代码]如何实现选择画面屏幕展开/收起

石头 12月 21, 2016 Report 5,663 views 0

创建选择画面时，SELECT-OPTION或PARAMTER的字段太多，让用户通过点击按钮展开或收起(也就是屏幕折叠)所需要的字段，这样不会使得整个界面太长。
下面是一个简单的例子，

REPORT Z_SCREEN_TEST.
TYPE-POOLS ICON.
TABLES MARA.
SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME .
PARAMETERS P_WERKS TYPE WERKS.
SELECTION-SCREEN END OF BLOCK B1.
SELECTION-SCREEN SKIP 1.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN PUSHBUTTON 1(4) BUT1 USER-COMMAND BUTTON1 VISIBLE LENGTH 2."按钮，
SELECTION-SCREEN COMMENT 6(20) COM1.
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF BLOCK B2 WITH FRAME .
SELECT-OPTIONS:S_MATNR FOR MARA-MATNR MODIF ID BL1,
               S_GROES FOR MARA-GROES MODIF ID BL1.
SELECTION-SCREEN END OF BLOCK B2 .

INITIALIZATION.
  WRITE ICON_DATA_AREA_EXPAND AS ICON TO BUT1 ."设置按钮BUT1的初始显示图标
  COM1 = 'DATA EXPAND'.
AT SELECTION-SCREEN.
* 按钮BUT1的图标切换
  CASE SY-UCOMM.
    WHEN 'BUTTON1'.
      IF BUT1 = '@K1@'.
        WRITE ICON_DATA_AREA_COLLAPSE AS ICON TO BUT1.
        COM1 = 'DATA COLLAPSE'.
      ELSE.
        WRITE ICON_DATA_AREA_EXPAND AS ICON TO BUT1.
        COM1 = 'DATA EXPAND'.
      ENDIF.
  ENDCASE.
AT SELECTION-SCREEN OUTPUT.
* 设置屏幕元素属性
  LOOP AT SCREEN.
    IF BUT1 = '@K2@' AND SCREEN-GROUP1 = 'BL1'.
      SCREEN-ACTIVE = 0.
      MODIFY SCREEN.
    ENDIF.
  ENDLOOP.