Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!think.com!mintaka!bloom-beacon!eru!hagbard!sunic!mcsun!hp4nl!ruuinf!jeroen
From: jeroen@ruuinf.cs.ruu.nl (Jeroen Fokker)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: Closing AES boxes interfering with VDI drawing
Keywords: aes dialog
Message-ID: <4545@ruuinf.cs.ruu.nl>
Date: 19 Dec 90 09:06:02 GMT
References: <GLAZOU.90Dec17101227@mowitz.pdc.kth.se> <111628@convex.convex.com> <3391@medusainformatik.uni-erlangen.de> <1990Dec18.161238.24031@unixg.ubc.ca>
Organization: Utrecht University, Dept. of CS
Lines: 40

In article <1990Dec18.161238.24031@unixg.ubc.ca> mintha@unixg.ubc.ca (Jim Mintha) writes:


>     I'm writing a program that uses only AES, and not VDI.  When I put up
>a dialog box, I save the portion of the screen used with my own copy routines,
>and when the dialog finishes, I copy the region back.  Everything works fine
>except when the user moves the mouse at a later time, a small square the size
>of the mouse appears with the standard desktop background pattern.  Is there
>anyway to avoid this, can I change the buffer used to hold what is underneath
>the mouse pointer background?

While copying the screen, you must temporarily switch the mouse off,
like in:

   copyscreen(from,to) long from,to;
   { 
        register long *x;
        register long *y;
        register int i;
        x = (long*) to;
        y = (long*) from;
        i = 8000;
        graf_mouse(M_OFF,0L);;
        do{  *x = *y;
             x++;
             y++;
          }
        while (--i);
        graf_mouse(M_ON,0L);
   }

Note for Swedish flamers: no, I do NOT intend to port
my programs to later versions of the Atari.
It is my decision to sacrifice portability later
for efficiency now. I am aware of the fact that it 
is harmful.
--
Jeroen Fokker                                 |  jeroen@cs.ruu.nl
dept.of Computer Science, Utrecht University  |  tel.+31-30-534129
PObox 80089, 3508TB Utrecht, the Netherlands  |  fax.+31-30-513791