# Property of Four Js*
# (c) Copyright Four Js 1995, 2019. All Rights Reserved.
# * Trademark of Four Js Development Tools Europe Ltd
#   in the United States and elsewhere
# 
# Four Js and its suppliers do not warrant or guarantee that these
# samples are accurate and suitable for your purposes. Their inclusion is
# purely for information purposes only.

IMPORT FGL MsgBox
GLOBALS "Globals.4gl"

DEFINE items DYNAMIC ARRAY OF RECORD
         item_line INTEGER,
         item_name VARCHAR(50),
         item_quant DECIMAL(8,2),
         item_price MONEY(10,2),
         item_total MONEY(15,2),
         item_id INTEGER
     END RECORD 

CONSTANT mytitle = "Orders"

FUNCTION ord_input(mode, cust_id, cust_name, ord_id)
    DEFINE mode CHAR(1)
    DEFINE cust_id INTEGER
    DEFINE cust_name VARCHAR(50)
    DEFINE ord_id INTEGER
    DEFINE i, id, s,r INTEGER
    DEFINE name STRING
    DEFINE price DECIMAL(10,2)
    DEFINE touched,reorder INT

    OPEN WINDOW w_ord WITH FORM "Orders"

    CALL items.clear()
    IF mode == 'M' THEN
       -- Simulate database fetch
       LET ordrec.ord_id = ord_id
       LET ordrec.ord_daddr = "5, Market Street"
       LET ordrec.ord_crea = TODAY - ord_id
       LET ordrec.ord_deliv = ordrec.ord_crea + 3
       LET ordrec.ord_valid = "n"
       -- Some item lines...
       LET i=0
       LET items[i:=i+1].item_line  = i
       LET items[1].item_id = 2
       LET items[i].item_name  = "Oranges (1Kg)"
       LET items[i].item_quant = 2
       LET items[i].item_price = 4.65
       LET items[i].item_total = items[i].item_quant * items[i].item_price
       LET items[i:=i+1].item_line  = i
       LET items[1].item_id = 1
       LET items[i].item_name  = "Apples (1Kg)"
       LET items[i].item_quant = 3
       LET items[i].item_price = 3.45
       LET items[i].item_total = items[i].item_quant * items[i].item_price
       LET ordrec.ord_amount = 0
       FOR i=1 TO items.getLength()
           LET ordrec.ord_amount = ordrec.ord_amount + items[i].item_total
       END FOR
    END IF

    DIALOG ATTRIBUTES(FIELD ORDER FORM, UNBUFFERED)

       INPUT BY NAME ordrec.* ATTRIBUTE(WITHOUT DEFAULTS=(mode=='M'))
       END INPUT

       INPUT ARRAY items FROM itemlist.* ATTRIBUTE(WITHOUT DEFAULTS)

         BEFORE INSERT
            CALL orditem_reorder(DIALOG)
         AFTER INSERT
            LET reorder=1

         AFTER DELETE
            LET reorder=1

         AFTER ROW
            IF FIELD_TOUCHED(itemlist.*) THEN
              LET touched=TRUE
            END IF
            IF reorder THEN
              CALL orditem_reorder(DIALOG)
              LET reorder=0
            END IF

         ON CHANGE item_quant
            CALL orditem_total(DIALOG, arr_curr())
         ON ACTION zoom_item
            LET r=DIALOG.getCurrentRow("itemlist")
            CALL select_item(DIALOG.getFieldBuffer("item_name")) RETURNING s, id, name, price
            IF s==0 THEN
               LET items[r].item_id = id
               LET items[r].item_name = name
               LET items[r].item_price = price
               CALL orditem_total(DIALOG, r)
               CALL DIALOG.setFieldTouched("item_name",TRUE)
            END IF
       END INPUT

       BEFORE DIALOG
          DISPLAY BY NAME cust_id, cust_name
          --init some items in the new record after the defaults have been filled in
          IF mode='A' THEN
            LET ordrec.ord_deliv = TODAY+1
          END IF

       ON ACTION accept
          ACCEPT DIALOG

       ON ACTION cancel
          IF touched OR FIELD_TOUCHED(ordrec.*) OR
             FIELD_TOUCHED(itemlist.*) THEN
             IF NOT mbox_yn(mytitle,"Close window without saving input?","question") THEN
                CONTINUE DIALOG
             END IF
          END IF
          EXIT DIALOG

      AFTER DIALOG
        -- Save data in database.
        DISPLAY "save data"

    END DIALOG

    CLOSE WINDOW w_ord
END FUNCTION

FUNCTION orditem_reorder(d)
    DEFINE d ui.Dialog
    DEFINE i INTEGER
    FOR i=1 TO d.getArrayLength("itemlist")
        LET items[i].item_line = i
    END FOR
END FUNCTION

FUNCTION orditem_total(d, r)
    DEFINE d ui.Dialog
    DEFINE r, i INTEGER

    LET items[r].item_total = items[r].item_quant * items[r].item_price
    LET ordrec.ord_amount = 0
    FOR i=1 TO d.getArrayLength("itemlist")
        LET ordrec.ord_amount = ordrec.ord_amount + items[i].item_total
    END FOR

END FUNCTION

FUNCTION select_item(filter)
    DEFINE filter STRING
    DEFINE i INTEGER
    DEFINE itemarr DYNAMIC ARRAY OF RECORD
               item_id INTEGER,
               item_name VARCHAR(50),
               item_price MONEY(10,2)
           END RECORD

    OPEN WINDOW w_item WITH FORM "ItemList"

    LET i = 0
    LET itemarr[i:=i+1].item_id = i    LET itemarr[i].item_name = "Apples (1Kg)"   LET itemarr[i].item_price = 4.25
    LET itemarr[i:=i+1].item_id = i    LET itemarr[i].item_name = "Oranges (1Kg)"  LET itemarr[i].item_price = 5.35
    LET itemarr[i:=i+1].item_id = i    LET itemarr[i].item_name = "Lemons (1Kg)"   LET itemarr[i].item_price = 4.95
    LET itemarr[i:=i+1].item_id = i    LET itemarr[i].item_name = "Melons (unit)"  LET itemarr[i].item_price = 1.55
    LET itemarr[i:=i+1].item_id = i    LET itemarr[i].item_name = "Peanuts (1Kg)"  LET itemarr[i].item_price = 2.25

    DISPLAY ARRAY itemarr TO sr.*
        AFTER DISPLAY
           IF NOT int_flag THEN
              LET i = arr_curr()
           ELSE
              LET int_flag = FALSE
              LET i = -1
           END IF
    END DISPLAY

    CLOSE WINDOW w_item

    IF i > 0 THEN
       RETURN 0, itemarr[i].item_id, itemarr[i].item_name, itemarr[i].item_price
    ELSE
       RETURN -1, NULL, NULL, NULL
    END IF

END FUNCTION