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making nodes read only [message #795254]

Fri, 10 February 2012 08:55

ganesh ram

Messages: 26
Registered: January 2012

Junior Member

Hi,

I drag n drop nodes from my palette on to the canvas.
I have set "Feature Sequence Initializer", so i set the attributes of that node by the time they are dropped on to the canvas.
How do i ensure that these nodes are read only ? ie i dont want the users to modify the attributes (using Properties View) of these nodes.

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Re: making nodes read only [message #795350 is a reply to message #795254]

Fri, 10 February 2012 11:19

Michael Golubev

Messages: 383
Registered: July 2009

Senior Member

Hello,

GMF-T does not support any kind of read-only-ness.

As a weak solution, you may try to remove the not allowed attributes from the property sheet by changing the

public List<IItemPropertyDescriptor> getPropertyDescriptors(Object object)

in the XXXProvider class (yourmodel.edit plugin).

This change will affect all property sheets showing your model instances, if you want to have different property sheets for default EMF tree editor and GMF diagram, please search through this forum, I am pretty sure this topic had been discused here.

Please ask in the EMF forum how to maintain the "real" readonly mode, I guess that prohibiting ResourceSetListener registered as a pre-commit and throwing RollbackException on inappropriate changes may be suitable.

Regards,
Michael "Borlander" Golubev
at Montages Think Tank, Prague, Czech Republic
Montages AG, Zürich, Switzerland

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Re: making nodes read only [message #795371 is a reply to message #795350]

Fri, 10 February 2012 11:46

ganesh ram

Messages: 26
Registered: January 2012

Junior Member

Michael,

That really helped, thanks Smile

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Re: making nodes read only [message #798076 is a reply to message #795371]

Tue, 14 February 2012 08:10

Ralph Gerbig

Messages: 702
Registered: November 2009

Senior Member

Hi,

maybe you should set this in the genmodel. Go to the nodes of the feature you want to have read-only and set property type to readonly. If you do not want a feature to appear in the property sheet set it to none. You can automate this by using a transformation e.g. ATL as below:

rule GenFeature2GenFeatur{
 from 
  s : genmodel!GenFeature
  to
   t : genmodel!GenFeature(
    property <- #Readonly
  )
}

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