Determining current block in Oracle Forms Using SYSTEM.CURSOR_BLOCK system variable. The value that the SYSTEM.CURSOR_BLOCK system variable represents depends on the current
If the current navigation unit is the block, record, or item (as in the Pre- and Post- Item, Record, and Block triggers), the value of SYSTEM.CURSOR_BLOCK is the name of the block where the cursor is located. The value is always a character string. If the current navigation unit is the form (as in the Pre- and Post-Form triggers), the value of SYSTEM.CURSOR_BLOCK is NULL.
Assume that you want to create a Key-NXTBLK trigger at the form level that navigates depending on what the current block is. The following trigger performs this function, using :SYSTEM.CURSOR_BLOCK stored in a local variable.
curblk := :System.Cursor_Block;
IF curblk = ’ORDERS’
ELSIF curblk = ’ITEMS’
ELSIF curblk = ’CUSTOMERS’
Determining current item using System.Cursor_Item in Oracle Forms. SYSTEM.CURSOR_ITEM represents the name of the block and item, block.item, where the input focus (cursor) is located.The value is always a character string.
Within a given trigger, the value of SYSTEM.CURSOR_ITEM changes when navigation takes place. This differs from SYSTEM.TRIGGER_ITEM, which remains the same from the beginning to the end of single trigger.
Assume that you want to create a user-defined procedure that takes the value of the item where the cursor is located (represented by SYSTEM.CURSOR_VALUE), then multiplies the value by a constant, and then reads the modified value into the same item. The following user-defined procedure uses the COPY built-in to perform this function.
PROCEDURE CALC_VALUE IS
new_value := TO_NUMBER(:System.Cursor_Value) * .06;