AutoRequest

Automatically build and get response from a requester.

Declaration

Source position: intuition.pas line 3245

Arguments

Function result

The return value is either True or False. See the text above for a complete description of the chain of events that might lead to either of these values being returned.

Description

This procedure automatically builds a requester for you and then waits for a response from the user, or for the system to satisfy your request. If the response is positive, this procedure returns TRUE. If the response is negative, this procedure returns FALSE.

An IDCMPFlag specification is created by bitwise "or'ing" your PosFlags, NegFlags, and the IDCMP classes IDCMP_GADGETUP and IDCMP_RAWKEY. You may specify zero flags for either the PosFlags or NegFlags arguments.

The IntuiText arguments, and the width and height values, are passed directly to the BuildSysRequest() procedure along with your window pointer and the IDCMP flags. Please refer to BuildSysRequest() for a description of the IntuiText that you are expected to supply when calling this routine. It's an important but long-winded description that need not be duplicated here.

If the BuildSysRequest() procedure does not return a pointer to a window, it will return TRUE or FALSE (not valid structure pointers) instead, and these BOOL values will be returned to you immediately.

On the other hand, if a valid window pointer is returned, that window will have had its IDCMP ports and flags initialized according to your specifications. AutoRequest() then waits for IDCMP messages on the UserPort, which satisfies one of four requirements:

• Iither the message is of a class that matches one of your PosFlags arguments (if you've supplied any), in which case this routine returns True.
• or the message class matches one of your NegFlags arguments (if you've supplied any), in which case this routine returns False.
• or the IDCMP message is of class IDCMP_GADGETUP, which means that one of the two gadgets, as provided with the PosText and NegText arguments, was selected by the user. If the True gadget was selected, True is returned. If the False gadget was selected, False is returned.
• Lastly, two IDCMP_RAWKEY messages may satisfy the request: those for the V and B keys with the left Amiga key depressed. These keys, satisfy the gadgets on the left or right side of the requester--True or False--, respectively.

When the dust has settled, this routine calls FreeSysRequest() if necessary to clean up the requester and any other allocated memory.

When DOS brings up AutoRequests() on your process (eg. "Please insert volume XXX in any drive", they normally come up on the Workbench screen. If you set your Process pr_WindowPtr field to point to one of your windows, then DOS will bring its requesters up on the same screen as that window. A pr_WindowPtr of -1 prevents requesters from coming up at all. (Some FileSystem requesters cannot be redirected or supressed).

See also