How to Cancel the command in callback functions?

[Alexander V. Koshman]

Hello!
Can somebody tell me is there a way to Cancel a calling Command in callback function to invoke some operations *before* and then to recall this Command again or call an another command or function?

I just found in the NG the reply of John Uhden, with the link to his Cancel.lsp. I tried it and find that it can't cancel Plot command!

Some other ways or I want too much? ; )

Thank you for your good will!

 

[John Uhden]

As the website advises "Note that commands such as "Quit" can not be cancelled as they require no further user input." To be more exact, there must be further command-line input in order to cancel. Perhaps you can accomplish what you want by undefining the "plot" and "print" commands, and defining custom clot and crint functions.

 

[Alexander V. Koshman]

John! Thank you! I will try!

 

[John Uhden]

Well, you could change "(vl-cmdf) " to (chr 3), but it's the same difference, so yes.

 

[Alexander V. Koshman]

Thak you John!

 

[Alexander V. Koshman]

Alas! John!

 

[John Uhden]

Using the "redefine" method, within your clot function, you could direct the program to proceed or not with the AutoCAD plot command.

 

[Alexander V. Koshman]

Oh! John!
I didn't understand you then!
....And I tryied to cancel the redefined clot with "(vl-cmdf) "... : (

Defining my own PLOT I can do what I want without a doubt but I would prefer to make two different and independent things with reactors...
... bacause of XXI century...

Thank you again!