Lisp Learning

[GeryKnee]

trying the following 

(defun c:ZoomW( / )
(command "_.zoom" "w" " " " ")
)

i get 

Command: zoomw
zoom
Specify corner of window, enter a scale factor (nX or nXP), or
[All/Center/Dynamic/Extents/Previous/Scale/Window/Object] <real time>: w
Specify first corner:
Invalid window specification.
; error: Function cancelled
Specify first corner: Specify opposite corner:

All that works

But why is answering "Invalid window specification" before asking "Specify first corner"," Specify opposite corner"

I believe something is missing, allthow work is done

Respects

Gery

[vporrash141089 · Accepted solution]

Maybe try this?

(command "_.zoom" "w" " ") I think you may have some extra enters

[GeryKnee]

Thank you very much

[vporrash141089]

Sorry my bad I'm also a beginner lol

Try this?

(defun c:ZoomW (/)

(command "_.zoom" "w")

(princ)

)

[ВeekeeCZ · Accepted solution]

You need to have 2 user inputs.

(defun c:zoomw () (command "_.zoom" "_w" pause pause) (princ))

Version (defun c:zoomw () (command "_.zoom" "_w") (princ)) also works, but it's kinda dirty. The routine will start command, select w option, then ends with the command kept open. 

[ВeekeeCZ]

---

@GeryKnee wrote:

trying the following 

(defun c:ZoomW( / )
(command "_.zoom" "w" " " " ")
)

...

---

" " means a SPACE. In LISP, space does not work as ENTER. Use "" if you need the ENTER functionality. For example

(command "line" "1,1" "5,5" "")

if you need user interaction, use PAUSE. One PAUSE, one user interaction. For a line, you need to have at least 2 points. Therefore (command "line" PAUSE PAUSE "")

If you need many user interactions, and you don't know how many, you need to fill the command function for the entire time the command is active. The CMDACTIVE sysvar will help you, HERE 

(command "_.line")
(while (> (getvar 'cmdactive) 0)
  (command PAUSE))

[Kent1Cooper]

Not to throw dirt on the discussion, but you really don't need to make a command like that.  The Window option is the default [note the first prompt after starting the command] -- you do not need to call for it overtly.

[Sea-Haven]

Yeah by the time you type "ZoomW" you could do "zoom w" microseconds difference, or "Z" only, like Kent window is default next choice. Check Acad.PGP for the command shortcuts.