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From: higgin@cbmvax.cbm.UUCP (Paul Higginbottom)
Newsgroups: net.micro.amiga
Subject: Re: Need Intuition Help
Message-ID: <640@cbmvax.cbmvax.cbm.UUCP>
Date: Sun, 17-Aug-86 12:13:43 EDT
Article-I.D.: cbmvax.640
Posted: Sun Aug 17 12:13:43 1986
Date-Received: Tue, 19-Aug-86 07:41:47 EDT
References: <1012@unirot.UUCP>
Reply-To: higgin@cbmvax.UUCP (Paul Higginbottom)
Organization: Commodore Technology, West Chester, PA
Lines: 22

In article <1012@unirot.UUCP> mikef@unirot.UUCP (mike fritze) writes:
>
>    I have an application in which I would like to program a resizable
> box on an Amiga window which can be positioned and resized by the
> mouse to select a screen area of interest.  I already know how to
> use the mouse in a C program via IDCMP but I do not know how to
> generate the box.  If I use a sprite, I am limited to a width of 16
>  pixels.  How can I generate such a box that does not interfere with
> the graphic image in the window it is used.  Any help would be greatly
>  appreciated.  Thanx.

Draw a line around the area of interest in COMPLEMENT mode.  To put
the picture back the way it was, you simply draw it again; an
"information preserving" transformation!

To accomplish this, you'll need SetDrMd(), Draw(), and possibly
SetAPen().  See RKM vol 1 for details.

	Hope this helps,
		Paul.

Disclaimer: I do not work for Commodore and my opinions are my own.