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Is Possible to roll back variable within undo command , outside of transaction?

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03-10-2012 07:30 AM

Hi,

I need to be able to roll back my variables if user apply an UNDO. I am just wondering if this is possible and what is your trick in this regard. Let's say.

 

Myinteger =1

 

Startstransaction

........

trans commint

 

Myinteger=2

 

 

Startstransaction

........

trans commint

 

Myinteger=3

 

 

if user does undo 2 times  the Variable  Myinteger  keep the value  3 . I want it back to 1. How?

 

Thanks for any help or workaround or trick.

 

Janet.

 

 

 

 

 

Hi,

 

store it in

  • Dictionary
  • ExtendedEntityData
  • Block with 500 Attributes

 

Just a few examples :smileywink:

 

- alfred -

*Expert Elite*
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Re: Is Possible to roll back variable within undo command , outside of transacti

03-10-2012 08:11 AM in reply to: JanetDavidson

Hi,

 

my understanding is one undo makes one (main) transaction-part undone. With main-transaction I mean the "master" transaction without looking to any nested transactions.

If you want to undo more than one actions with one step you can set undo-markers.

 

- alfred -

-------------------------------------------------------------------------
Alfred NESWADBA
Ingenieur Studio HOLLAUS ... www.hollaus.at
-------------------------------------------------------------------------
Distinguished Contributor
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Re: Is Possible to roll back variable within undo command , outside of transacti

03-10-2012 09:43 AM in reply to: Alfred.NESWADBA

Hello Alfred,

Thanks for your time looking into my question. 

My concern is  the public shared variable in whole project  ( in this simple sample, say , "myinteger".

When I  undo a  command that variable doesn't roll back ot initial value . 

Hope I explained or you need a asimple example code?

Regards,

Janet.

 

 

*Expert Elite*
9,785 Posts
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Registered: ‎06-29-2007
Post 4 of 7

Re: Is Possible to roll back variable within undo command , outside of transacti

03-10-2012 10:02 AM in reply to: JanetDavidson

Hi,

 

Ok, you want your local variable to be restored, sorry, I did'nt check that.

 

So my ideas would be then: either check CommandEnded-event (watchign for command _UNDO) and use a stack for every variable-change or use a drawings-sysvar for saving and restoring your variable, because the sysvars (e.g. USERI1) will notice undo-commands.

 

In this case (I normally don't use the USER-vars) the advantage is also that you have saved it with the drawing. Because if the user changes the drawing between step 2 and step 3 your global variable will also have to be reset as the other drawing may stay at another step.

 

- alfred -

-------------------------------------------------------------------------
Alfred NESWADBA
Ingenieur Studio HOLLAUS ... www.hollaus.at
-------------------------------------------------------------------------
Distinguished Contributor
141 Posts
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Registered: ‎08-23-2011
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Re: Is Possible to roll back variable within undo command , outside of transacti

03-10-2012 10:55 AM in reply to: Alfred.NESWADBA

Thanks Alfred ,  I got it and I understood.

Now let's say that local vairable  instead of one,  is 500 local variables . 

In this case what would be the solution ?

Regards,

Janet.

 

*Expert Elite*
9,785 Posts
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Registered: ‎06-29-2007
Post 6 of 7

Re: Is Possible to roll back variable within undo command , outside of transacti

03-10-2012 11:09 AM in reply to: JanetDavidson

Hi,

 

store it in

  • Dictionary
  • ExtendedEntityData
  • Block with 500 Attributes

 

Just a few examples :smileywink:

 

- alfred -

-------------------------------------------------------------------------
Alfred NESWADBA
Ingenieur Studio HOLLAUS ... www.hollaus.at
-------------------------------------------------------------------------
Distinguished Contributor
141 Posts
2 Kudos
Registered: ‎08-23-2011
Post 7 of 7

Re: Is Possible to roll back variable within undo command , outside of transacti

03-11-2012 12:10 AM in reply to: Alfred.NESWADBA

Hi alfred, I like Attributes Idea, Yeah that will do the job for me.

Thanks for showing the trick.

 

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