Path: utzoo!mnetor!uunet!husc6!rutgers!rochester!pt.cs.cmu.edu!cadre!pitt!cisunx!jgh2
From: jgh2@cisunx.UUCP (John G. Hardie)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Gadgets and requesters: trying to get started
Message-ID: <8829@cisunx.UUCP>
Date: 20 Apr 88 01:50:30 GMT
References: <27194@cca.CCA.COM>
Reply-To: jgh2@unix.cis.pittsburgh.edu.UUCP (John G. Hardie)
Organization: Nuclear Physics Lab, Univ. of Pittsburgh
Lines: 72

In article <27194@cca.CCA.COM> jack@cca.CCA.COM (Jack Orenstein) writes:
>
>I'm trying to learn about requesters and gadgets with the help of Peck's
>book and I'm having some trouble. The information in chapter 5 seems
>incomplete. In particular, I can't find any discussion of how to attach
>a requester to a window. The paint program in chapter 5 doesn't seem to
>do it, and the topic isn't discussed in the text. Yet the window data

The easiest way, if you just want to put up simple requesters is to use
the intuition function AutoRequest.  This is called as follows:

AutoRequest(wi,bt,pt,nt,pf,nf,w,h)	where:
	wi	->	pointer to window struct.
	bt	-> 	pointer to intuitext structure that contains the
			main text of the requester.
	pt	->	pointer to intuitext struct that contains the
			text for the positive hit box
	nt	-> 	pointer to intuitext...negative hit box
	pf	->	IDCMP flags that you want set for the positive
			text.
	nf	-> 	same for negative text
	w	->	width of requester
	h	-> 	height of requester.

This routine will build and display a simple requester (similar to
the 'insert disk' type of requester), and it's fairly easy to use.

If you want  more details on this call, or more info on more flexible
requesters, get the Addison Wesley Intuition Reference Manual.	

>structure in intuition.h has a FirstRequest field, a DMRequest field
>(what does the DM stand for?), and a ReqCount field. I've tried filling
		^^
		Double Menu... This type of requester is attached
( in a sense ) to a double click of the mouse menu button.  If you 
define one of these requesters and double click the menu button while in
the active region of the window, the requester will appear like magic.
(see intuition man. for more details)

>in the FirstRequest field and the ReqCount field, but the requester does
>not appear. Also, how do the sizes of the requester and any attached
>gadgets relate? Are gadget coordinates relative to the requester or to
>the window containing the requester?

- if a gadget is attached to a requester, the coordinates are relative
(usually) to the top left corner of the requester.  The size of the
requester relative to the window is set by you, usually the gadgets
are placed absolutely relative to the requester, but you don't have
to do it this way (e.g. GRELBOTTOM, GRELWIDTH and others of that ilk -
sorry, these are flags that you can set in the gadget structure that
will make the gadget position and size relative to the size of the 
requester - again, see intuition manual for details)

>
>Are there other fields (in the requester or window) that have to be set?
>Are there commands for displaying and clearing requesters? Are there any
>books with more complete information?
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

	guess what??? Intuition Manual.... :-)

>
>Jack Orenstein

Hope this helps,
John

-- 
John Hardie - Physics Dept  U. Of Pittsburgh  Pittsburgh, Pa 15260
jgh2@cisunx.UUCP, jgh2@{unix or vms}.Cis.Pittsburgh.Edu, jgh2@PITTVMS.BITNET

	An Ounce Of Inaccuracy Saves A Pound Of Explanation