AFTER DELETE block
The AFTER DELETE
block is executed each time the user deletes a row
of an INPUT ARRAY
list, after the row has been deleted from the
list.
The AFTER DELETE
block is executed after the BEFORE
DELETE
block and before the AFTER ROW
block for the
deleted row and the BEFORE ROW
block of the new current row.
When an AFTER DELETE
block executes, the program array has already
been modified; the deleted row no longer exists in the array (except in the special
case when deleting the last row). The arr_curr()
function
or the ui.Dialog.getCurrentRow()
method returns the same index as in BEFORE ROW
, but it is the index
of the new current row. The AFTER ROW
block is also executed just after
the AFTER DELETE
block.
AFTER DELETE
is executed for the delete row, and DIALOG.getCurrentRow()
/
arr_curr()
will be one greater than DIALOG.getArrayLength()
/ ARR_COUNT()
. Ensure you avoid accessing a dynamic array with a row index
that is greater than the total number of rows, otherwise the runtime system will adapt the
total number of rows to the actual number of rows in the program array. When using a static
array, you must ignore the values in the rows after ARR_COUNT()
.Here the AFTER DELETE
block is used to re-number the rows with a new
item line number (note that DIALOG.getArrayLength()
/ ARR_COUNT()
may
return zero):
INPUT ARRAY p_items FROM s_items.*
AFTER DELETE
LET r = DIALOG.getCurrentRow("s_items")
FOR i=r TO DIALOG.getArrayLength("s_items")
LET p_items[i].item_lineno = i
END FOR
...
It is not possible to use the CANCEL DELETE
instruction
in an AFTER DELETE
block. At this time it is too late to
cancel row deletion, as the data row no longer exists in the program array.