Creating undeletable object - possible?

[the-trooper]

Hello everyone.

 

Is it possible to create an undeletable object (line or text) in a dwg? I need something that would serve as "trademark" on DEFPOINTS, in our blocks sent to others.

 

Thanks in advance!

[ReMark]

This sounds like something that might possibly be doable using Visual LISP but I'm not a programmer so I cannot say with 100% certainty that it can be done. I've read where someone has used Visual LISP to make objects visible or invisible by resetting their visibility property. Perhaps there is a 'lock' property? Someone like Lee Mac might be able to provide you with a more definitive answer.

[the-trooper]

Thanks, ill contact Lee Mac.

In meantime, admins, if this thread is in a wrong place, please move it to the right one

[Lee Mac]

How about switching off the Visibility of an Object?

 

AFAIK this makes it undetectable

[alanjt]

How about switching off the Visibility of an Object?

 

AFAIK this makes it undetectable

visibility is the only real option.

however, the little light bulb at the bottom corner will show that something's visibility is 'turned off' and can easily be turned back on.

especially problematic if these functions are actually utilized by the user.

with the way C3D styles ignore layers, i use the isolate and hide function at times.

 

just a little food for thought.

 

.......can an object reactor prevent erasing?

[Lee Mac]

Obviously, if you made a Block Invisible - it would still show up in the Block Editor, so an object would be better.

 

The Object would still appear in the drawing database, but would be "un-selectable" by the user (and would only be able to be accessed by other means).

[Lee Mac]

however, the little light bulb at the bottom corner will show that something's visibility is 'turned off' and can easily be turned back on.

 

 

Light bulb?

[the-trooper]

You're talking about visibility state in block editor?

[alanjt]

Light bulb?

bottom right corner:

[alanjt]

i take it back, it doesn't detect it.

(vla-put-visible (vlax-ename->vla-object (car (entsel))) :vlax-false)

will do exactly what you want.

[the-trooper]

You lost me guys...

[Lee Mac]

Don't think I have that light bulb in ACAD 2010.

[Lee Mac]

You lost me guys...

 

What would you like to be made invisible?

[the-trooper]

What would you like to be made invisible?

 

One line of text, doesn't even need to be text, i can "write" it with lines/polylines.

 

But it must be visible, on screen. On defpoints, so others can plot normally.

 

Should be undeletable.

[ReMark]

I thought we were trying to lock an object?

 

CADTutor himself suggested the use of a 'read-only' xref to a similar question. That assumes the person that the drawing is sent to does not know how to reset the read-only attribute. Do most people know how to do that these days? I do but then I grew up with DOS.

[dbroada]

bottom right corner:

no, never seen that either.

[Lee Mac]

If it was invisibility you were looking for:

 

(defun c:invis (/ ent)
 (vl-load-com)
 (if (setq ent (car (entsel "\nSelect Object: ")))
   (vla-put-Visible
     (vlax-ename->vla-object ent) :vlax-false))
 (princ))

(defun c:vis (/ ss)
 (vl-load-com)
 (if (setq ss (ssget "_X"))
   (mapcar
     (function
       (lambda (x)
         (vla-put-visible
           (vlax-ename->vla-object x) :vlax-true)))
     (mapcar 'cadr (ssnamex ss))))
 (princ))

 

*couldn't resist*

 

But as for undeletable.... hmm, thats a bit trickier.

 

Obviously a locked layer is the simple answer, but that assumes they don't know how to unlock a layer.. which is pretty obvious.

 

Perhaps a persistent object reactor could do the trick, but I've never done anything like that, so we are stabbing in the dark a bit here...

[ReMark]

Stabbing in the dark. That sounds like a job for Super Mac! I bet you could figure it out.

[mdbdesign]

How about something like "Educational stamp" but in visible and non plot-able version?

[Lee Mac]

How about something like "Educational stamp" but in visible and non plot-able version?

 

I think the Educational Stamp is a lot deeper than LISP