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Re: Object Graphic Slows on resize [message #32881 is a reply to message #32879]

Fri, 15 November 2002 15:52

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Mark Servetus (markservetus@hotmail.com) writes:

> I have a single IDLgrView with several IDLgrImage objects (including
> transparancies). I drag them around and do other mouse events with
> objects just fine, with good performance.
>
> However, once I resize the window and it re-draws, everything slows
> terribly.
>
> It seems to me that the cache is created with their original sizes,
> and upon resize, all subsequent draws have to do major interpolation
> from the cache. The only guess that has made sense to me yet. (It
> happens even when I shrink the window.)

I'm going to guess you are doing something that a couple
of weeks from now, when you know better, you would just
as soon nobody knew about. There is really no reason for
the drawing output to slow down noticeably that I can
think of. Well, objects are *always* slower than direct
graphics, but never obnoxiously slow, unless you have done
something wrong (easy to do).

I'd have a good long look at that code. With object graphics
there are always a handful of ways to implement your graphics
tree. I'd try another way and see if your results are similar.

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: Object Graphic Slows on resize By: Rick Towler on Fri, 15 November 2002 16:09
		Re: Object Graphic Slows on resize By: David Fanning on Fri, 15 November 2002 15:52
		Re: Object Graphic Slows on resize By: markservetus on Mon, 18 November 2002 08:16

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