[news.eclipse.modeling.gmf] Re: copy paste issue

[markitus <jxtamarc@xxxxxxxxx>]

Hi Thomas,

Perhaps I misunderstood or I missed something. But wouldn't the result be 
the same (or similar)  if we extend AbstractClipboardSupport (which 
implements IClipboardSupport) and rewrite these methods? 

Anyway, I'm clearly confused, as you see. 

My problem is not  pasting into compartments , I didn't even get that far 
yet :( . I've enabled the copy/Paste option so it shows up in the 
contextual menu. I'm being able to copy or paste whatever elements I want 
to(graphically), but when I try to make these changes persistent these 
new copied elements simply disappear. Even if I add an original object 
from the palette after a copy/paste action, the previously copied 
elements disappear from the canvas. It is so weird!!

So I'm not sure if i have to rewrite anything since I'm not trying to do 
anything special, just a simple copy paste action with simple elements 
(not compartments). 

Should I expect this to work straight,  or should I rewrite some code ?

Thanks for your help.

Marc.

El dia Thu, 19 Feb 2009 19:22:49 +0100, en/na Thomas Beyer va escriure:

> Hi Markitus,
> 
> I really struggled a long time with cut, copy & paste, especially
> pasting into compartments.
> 
>  From what I can tell, GMF provides everything you need and implements a
> very powerful framework around copy-paste. If you see all the related
> classes, its a quiet complex job.
> Marios approach might also work for your use-case, unfortunately I never
> got it working for my editors.
> 
> There is just two little hints, I'd like to give you: 1. Make sure to
> use uuids for your semantic model as described in this post:
> http://serdom.eu/ser/2008/07/02/eclipse-gmf-enabling-uuids-in-semantic-
model-the-simplest-way
> There are lots of others threats in this group, adressing exactly this
> issue as well.
> 
> 2. Fork the class NotationClipboardOperationHelper(in plugin
> org.eclipse.gmf.runtime.notation.providers)
> 	and modify the following methods:
> 	a)
> 	static EObject getSemanticPasteTarget(View view) {
> 		View parent = (View) view.eContainer(); return 
parent.getElement();
> 	}
> 
> 	b)
> 	private boolean shouldAllowPaste(
>              PasteChildOperation overriddenChildPasteOperation) {
>          EObject eObject = overriddenChildPasteOperation.getEObject();
>          EObject parentEObject = overriddenChildPasteOperation
>              .getParentEObject();
> 	//implement your logic here, that checks, if eObject is allowed 
zo be
> can be pasted in the parentEObject
> 	}
> 
> I got the clue from this page:
> http://wiki.eclipse.org/
GMF_Newsgroup_Q_and_A#How_to_make_copy.2Fpaste_work_on_compartments.3F
> , which contains so many useful solutions!!!
> 
> Forking basically means, you import the plugin above from the eclipse
> cvs base, modify the code and use your customized plugin for your
> application, rcp or whatever. (just in case you struggle with the term,
> like I used to)
> Let me know, if you need any further help.
> 
> 
> HTH
> Regards,
> Thomas
> 
> 
> 	
> markitus schrieb:
>> Hi,
>> 
>> I'm trying to copy and paste single elements from a model into a new
>> model. Apparently it looks like it's done, since I can see a graphical
>> copy of that element, but if I try to save the diagram and open it back
>> it just disappears.
>> 
>> any ideas?? this is starting to drive me crazy. I haven't been able to
>> find any complete and clear example of a simple copy paste action on
>> GMF. Many people has already asked this issue on this list before me
>> but it seems like there aren't any convincing solution.
>> 
>> Please, help!
>> 
>> thank you!
>>