| Using parallel dialogs / Structure of a declarative DIALOG block | |
The MENU sub-dialog implements a list of choices for the user by using action handlers.
The following code example shows a MENU sub-dialog implementing a couple of action handlers with an ON ACTION clause or with a COMMAND clause (action views of COMMAND can get the focus):
DIALOG ()
MENU
ON ACTION customer_view
...
ON ACTION order_view
...
END MENU
END DIALOG
Simple record input declared with the INPUT sub-dialog can raise the following triggers:
In the singular MENU instruction, BEFORE MENU and AFTER MENU blocks are typically used as initialization and finalization blocks. In an MENU sub-dialog of a DIALOG block, BEFORE MENU and AFTER MENU blocks will be executed each time the focus goes to (BEFORE) or leaves (AFTER) the action views (buttons) controlled by this sub-dialog.