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I think one definitely would have faced this problem while integratiing many instances/blocks in the top level layout in Virtuso.
The problem I am facing is as follows:-
In the top level of the layout, I have to integrate many instances of layout blocks.
While connecting two blocks ( these two blocks are inside a bigger blocks (like PAD array) or may be crossing over another small block) , some how some the other blocksare getting moved.
Ideally like to keep the positions of other instances ( let's say A, B, C) fixed, while editing the desired instances ( let's say E,F) as movable.
I tried in LSW. I dehighlighted the 'inst'. In that process, all the instances are becoming un-movable. Even if you bring a VIA , you can't move it around.
Could anybody please tell what I should do thing smoothly.
In IC615 (you didn't say which version you are using, and it's rather useful to know...) you can use Edit->Select->Set Selection Protection to "protect" a number of shapes/instances. This will make those objects unselectable (you can highlight them from the same menu, or temporarily override the protection, or remove the protection). That means you won't be able to accidentally select them and hence not be able to move them.
In earlier releases, you can use my SKILL code as described in this article on Cadence Online Support to do the same thing.
If you're using VLS XL you can also use the constraint manager to add a "locked" constraint on the instance to stop you being able to move it when in Constraint Aware Editing mode. Could also use a "fixed" constraint.
In IC5141 it's also possible using Virtuoso Layout XL - you have to use Tools->Constraint Manager in the CIW, and then you can add a "fixed" constraint for some instance. You have to turn on "Constraint Assisted Move and Stretch" in the Layout XL Options form too.
In reply to Andrew Beckett:
Thanks alot for your reply.
I am using IC5141. I tried Tool ->Constraint Manager in the CIW.
But couldn't figure out how to 1) Select a instance to be added to the manager
2) To make the instance Fixed
Could you please tell how it can be done.
In reply to RFStuff:
I also tried with your SKILL code.
Itis working fine.
But, I protected A,B,C
Then I want to unprtect only C , then what I should do.
I got. I think I should have selected Create, Then add the instances in the 'Fixed" option.
With that, I am able to keep them fixed in the layout but they are selectable unlike your SKILL code.
If using my SKILL code, you have two choices:
Obviously this tends to be easier if you have things defined on bindkeys. You could also define a bindkey to be:
which will toggle protect mode on or off each time you press it.
In the IC615 implementation, there's the option to unprotect an object post-selection, so you can click on it regardless of whether it is selectable (I didn't add that in my code, but it wouldn't be too difficult with an enterFunction).
Thanks a lot for your reply.
I like to do some modification to your skill code.
But the "SKILL" is a new language to me.
I want to know the meaning of each standard function present in thye code.
I went through "Cadence Analog Design Environment SKILL Language Reference", but I could not find the many functions present in your code.
Could you please point to some document/source from where I can get the meaning of all the STANDARD functions you have written in the code.
Given that this code is for the layout editor, it's hardly surprising that nothing is covered in the Cadence Analog Design Environment SKILL Language Reference.
There are functions from three groups in this code:
The code is written using LISP style (SKILL also allows you to use a C-style which is probably more common, but I tend to write most of my code using LISP style; the language is really a LISP flavour underneath, but it makes no difference to efficiency or speed which style you choose).
Hope that helps!
Sorry, I think I have searched the functions in the wrong reference.
Thanks a lot. I will dig into the documents to understand the functions.