Atari Mega Archive 1/Atari Mega Archive - Volume 1.iso/lists/gem/l_0799/701

Internet Message Format | 1994-08-27 | 1.2 KB

Date: Wed, 6 Jul 1994 10:51:19 -0400 (EDT)
From: Timothy Miller <[e-mail]>
Subject: Re: available keys
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Forget:

)>If you used a 1-pixel rectangle, then your program would be interrupted
)>every time the mouse moved.  This wouldn't take a whole lot more overhead
)>than the interrupts that the OS gets from the hardware.
)
)The point is that you are not using a one pixel rectangle; most of the
)time you are using fairly large rectangles.  This is _HARD_ to
)implement, and harder to understand, but if you have working source
)code you do not need to worry about it much; check out Tim Oren's
)ProGEM series of articles; it has source code for this, and an
)explanation (if you can wade through the complexities of it; it was
)a long time ago that I read it, but I'm pretty sure it went right
)over my head at the time).

I KNOW it's hard, which is why I suggested using a 1-pixel rectangle.
But others are correct... if you track a 1-pixel rectangle, then you'd
have to call objc_find every time the mouse moved, which WOULD cause a
lot of overhead.