Usage / DIALOG interaction blocks |
The ON UPDATE trigger can be used to enable row modification during a DISPLAY ARRAY dialog. If this block is defined, the dialog will automatically create the update action. This action can be decorated, enabled and disabled as regular actions.
You typically configure the TABLE container in the form by defining the DOUBLECLICK attribute to "update", in order to trigger the update action when the user double-clicks on a row.
If the dialog defines an ON ACTION update interaction block and the ON UPDATE block is used, the compiler will stop with error -8408.
When the user fires the update action, the dialog executes the user code of the ON UPDATE block.
DISPLAY ARRAY arr TO sr.* ... ON UPDATE INPUT arr[arr_curr()].* WITHOUT DEFAULTS FROM sr[scr_line()].* ; ...
Pay attention to the semicolon ending the INPUT instruction, which is usually needed here to solve a language grammar conflict when nested dialog instructions are implemented.
After the user code is executed, the dialog gets the control back and processes the current row as follows:
The DISPLAY ARRAY dialog always resets INT_FLAG to FALSE and STATUS to zero before executing the user code of the ON UPDATE block.