Using parallel dialogs

Dialog coding concepts, configuration and code structure.

Parallel dialogs are implemented with declarative DIALOG blocks:

DIALOG control_list1()
    DISPLAY ARRAY arr TO sr.*
        ...
    END DISPLAY
END DIALOG

Instances of declarative dialogs are started with the START DIALOG instruction (typically preceded by an OPEN WINDOW instruction that creates the corresponding window+form):

OPEN WINDOW w_list1 WITH FORM "simple_list"
START DIALOG control_list1

Instances of declarative dialogs are stopped with the TERMINATE DIALOG instruction:

TERMINATE DIALOG control_list1

In order to initiate parallel dialogs, the program must run the user interface event loop by calling the fgl_eventloop() built-in function in a WHILE loop.

The simplest form of the user interaction event loop is:

WHILE fgl_eventLoop()
END WHILE

Before or during the user interface event loop, modal dialogs can be executed without conflicts. For more details about parallel dialogs versus modal dialogs, see What are dialog controllers?.