comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » IDL 5.0 observations

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: IDL 5.0 observations [message #9232 is a reply to message #9092]

Thu, 05 June 1997 00:00

Stein Vidar Hagfors H is currently offline

Stein Vidar Hagfors H
Messages: 32
Registered: May 1997

Member

Another change to the widget handling that I've found
is that calling XMANAGER without any arguments will no
longer resume event processing when called from "within"
another XMANAGER call.

Some times, I like to be able to have widget "A"'s event
procedure "A_EVENT" read in data, start off widget B
from within A_EVENT to display the data, *without* making
A modal (so you can read and display other data sets from A),
but still let the call to B *not* "fall through" - i.e., to
delay the return from B until B actually dies and no longer
needs the data passed to it.

This is handy for those situations where B uses a NO_COPY
operation that would make it's arguments undefined upon
an immediate return.

I'm aware that making B "hang" without modalizing A will
allow A to be killed before killing B (when the return from
B to A_EVENT comes, A may not be valid), but that's quite
OK: The point is that the arguments passed to B may have to
be returned to the user who started A from the prompt, so
A_EVENT needs to get it's hands on the arguments to B *after*
B dies.

In v 4.0.1 one could do this by using something like

XMANAGER,"B",BASE
WHILE WIDGET_INFO(BASE,/VALID_ID) DO XMANAGER

in program B, but this now causes an infinite loop calling
XMANAGER without causing events to be processed (but taking
100% cpu power).

This may not be a big problem, but it's at least a significant
change in the way XMANAGER behaves.

Stein Vidar

Report message to a moderator

[Message index]

		IDL 5.0 observations By: Phil Williams on Tue, 27 May 1997 00:00
		Re: IDL 5.0 observations By: Gilles Ratel on Wed, 04 June 1997 00:00
		Re: IDL 5.0 observations By: Mirko Vukovic on Tue, 03 June 1997 00:00
		Re: IDL 5.0 observations By: davidf on Tue, 03 June 1997 00:00
		Re: IDL 5.0 observations By: Paul R Smith on Tue, 03 June 1997 00:00
		Re: IDL 5.0 observations By: davidf on Tue, 03 June 1997 00:00
		Re: IDL 5.0 observations By: Mirko Vukovic on Mon, 02 June 1997 00:00
		Re: IDL 5.0 observations By: davidf on Fri, 30 May 1997 00:00
		RE: IDL 5.0 Observations By: davidf on Mon, 09 June 1997 00:00
		Re: IDL 5.0 Observations By: Andy Loughe on Mon, 09 June 1997 00:00
		Re: IDL 5.0 observations By: davidf on Sun, 08 June 1997 00:00
		Re: IDL 5.0 observations By: thompson on Fri, 06 June 1997 00:00
		Re: IDL 5.0 observations By: davidf on Thu, 05 June 1997 00:00
		Re: IDL 5.0 observations By: Stein Vidar Hagfors H on Thu, 05 June 1997 00:00

Previous Topic:	Sell YourPhotosNYC.Agency
Next Topic:	writing PCX files

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 07:24:25 PDT 2025

Total time taken to generate the page: 0.23927 seconds