cursor freeze in AC2022 with grread

[rob.tosch]

Hi,
if I run a simple testprogramm ...

;;; testprogramm ... 
(defun foo( / x)
 (while(= 5(setq x(car(grread t 15 0))))
  (redraw))
  (princ(strcat "test result: " (itoa x))))
;;; end testprogramm

... in AutoCAD 2022 (AC2022), while drawing a eg a poli ... type (foo) + enter ... the cursor freeze.
... is this a bug?

I wrote many usefull programms with grread, but in AC2022 the cursor hang.

thanks for tips ...
rob

[BlackBox]

I am not seeing that in 2022:

Command: (foo)
test result: 3"test result: 3"

[rob.tosch]

I am not seeing that in 2022:

Command: (foo)
test result: 3"test result: 3"

... yes but, to see what the cursor does, you have to be in a eg. Line or poli command.
So, please draw a line, and after some points call (foo)
... than - just in ac2022 the cursor hang.

Grread this is a really valuable function, because it can evaluate the position of the cursor and the keys.
I have more than 30 snap functions, which I use permanently.

thanks for response
Rob

[BlackBox]

Okay, I am able to reproduce this comparing 2019 to 2022... But I still do not believe it is a bug, based on the GRREAD documentation in help:

<snip>

Remarks

Only specialized AutoLISP routines need this function. Most input to AutoLISP should be obtained through the various getXXX functions.

Entering Esc while a grread is active aborts the AutoLISP program with a keyboard break (unless the allkeys argument has disallowed this). Any other input is passed directly to grread, giving the application complete control over the input devices.

<snip>

Ironically, it sounds like Autodesk has fixed a bug in 2022, that previously allowed GRREAD to work in-command in older versions. Since you're only posting a small snippet of code, I don't understand why you'd even want to call GRREAD in-command, when it's usually used to allow you to have a custom LISP routine mimic actual Commands.

Regardless, as the behavior has changed, you should consider reporting it to Autodesk and/or create an API Support ticket.

Cheers

[rob.tosch]

Okay, I am able to reproduce this comparing 2019 to 2022... But I still do not believe it is a bug, based on the GRREAD documentation in help:



Ironically, it sounds like Autodesk has fixed a bug in 2022, that previously allowed GRREAD to work in-command in older versions. Since you're only posting a small snippet of code, I don't understand why you'd even want to call GRREAD in-command, when it's usually used to allow you to have a custom LISP routine mimic actual Commands.

Regardless, as the behavior has changed, you should consider reporting it to Autodesk and/or create an API Support ticket.

Cheers

Thank you BlackBox for answer!

grread is supposed to allow access to the cursor during a command.
Including cursor point, keyboard clicks and the mouse buttons.
without an active command it wouldn't make sense.

i shortened the program example so you don't have to read 5 pages of code including vb program with the same result.
leemac has very clearly pointed out the value of grread.
Look here ... http://www.lee-mac.com/grsnap.html

for me grread opened a new world of point snapping.
So I could mark the snap point already at that time, before autocad itself considered it necessary.

It is also noticeable that "cursor hangs" problems in AC22 - not related to grread - are becoming more frequent.

Best regards
Rob