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GuruMeditation
Docs » Autodocs » intuition.library » AutoRequest

NAME

	AutoRequest -- Automatically build and get response from a requester.

SYNOPSIS

	Response = AutoRequest( Window, BodyText, PosText, NegText, 
	D0                      A0      A1        A2       A3
			PosFlags, NegFlags, Width, Height )
			D0        D1        D2     D3
	BOOL AutoRequest( struct Window *, struct IntuiText *,
		struct IntuiText *, struct IntuiText *, 
		ULONG, ULONG, WORD, WORD );

FUNCTION

	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:
	-   either 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.
	    NOTE: For V36, these two keys left-Amiga-B and V are processed
	    through the default keymap.
	When the dust has settled, this routine calls FreeSysRequest() if
	necessary to clean up the requester and any other allocated memory.
	NOTE: For V36, this function now switches the processor stack
	to ensure sufficient stack space for the function to succeed.

INPUTS

	Window = pointer to a Window structure.  See BuildSysRequest()
	    for a full discussion.
	BodyText = pointer to an IntuiText structure
	PosText = pointer to an IntuiText structure, may by NULL.
	NegText = pointer to an IntuiText structure, MUST be valid!
	PosFlags = flags for the IDCMP
	NegFlags = flags for the IDCMP
	Width, Height = the sizes to be used for the rendering of the requester 
	NOTE for V36: The width and height parameters are ignored, as
	are several other specifications in the IntuiText, to make
	AutoRequest() requesters retroactively conform to the new look
	designed for EasyRequest().

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.

NOTES

	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).

BUGS

	The requester no longer devolves into a call to DisplayAlert()
	if there is not enough memory for the requester.

SEE ALSO

EasyRequestArgs(), BuildSysRequest(), SysReqHandler()

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