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Re: testcase [message #30046 is a reply to message #30045]

Wed, 03 April 2002 17:48

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Ted Cary (tedcary@yahoo.com) writes:

> Just run the program, resize the window a few times, and watch the
> command line. If your computer is like mine, TLB_SIZE events will
> always generate WIDGET_DRAW expose events, and the X field in the expose
> event structures will not depend on the viewport position at all, but
> will always be equal to the draw widget's screen y size. What am I
> doing wrong?

Well, on my Windows machine I don't see this behavior at
all. But on the other hand, what I do see makes about
as much sense as what you see. If I run the program in
Windows IDL 5.4, then event.x after the resize/expose
event is always set to 0. But the scroll bars are
obviously not set at zero. In Windows IDL 5.5, event.x
is always set to 0, but the scroll bars have now been
reset to the zero position, so this makes mathematical
sense, even if it would cause a user to tear his hair
out in frustration, since his view changes every time
he touches the damn program!

If you want my opinion, I'd stay as far away
from the APP_SCROLL keyword as possible.

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
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: testcase By: btupper on Thu, 04 April 2002 05:37
		Re: testcase By: Pavel Romashkin on Wed, 03 April 2002 19:50
		Re: testcase By: btupper on Wed, 03 April 2002 18:38
		Re: testcase By: Rick Towler on Wed, 03 April 2002 17:35
		Re: testcase By: David Fanning on Wed, 03 April 2002 17:48

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