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Nested objects' connection handles not working within a compartment [message #557750]

Wed, 08 September 2010 13:38

Eclipse User

Hi All,

I've been developing EMF based plugins for sometime but I'm pretty new to GMF - hence this newbie question. I have a model with small objects (say, Flowers) nested within a bigger container object (say, Basket) and two Flowers can be connected via a link object (FlowerLink), I'm using a Compartment (FlowerCompartment) for grouping / nesting Flowers inside the Basket. Everything works fine and I can nest Flowers inside the Basket (compartment) and link them with FlowerLinks using the FlowerLink creation tool. However the problem is that I cannot use the connection handles that appear on the Flower objects to make a link from one Flower object to another; when I drag a handle (either out-going or incoming) onto another flower, it simply shows that I cannot make such a link.

I think I'm missing something trivial but I couldn't find anything similar on the forum Sad

- any pointers would be really helpful.

Thanks in advance.

- Asiri Rathnayake.

Re: Nested objects' connection handles not working within a compartment [message #557760 is a reply to message #557750]

Wed, 08 September 2010 14:38

Eclipse User

I couldn't give up, just found the answer to my question on this thread. Hope this will help someone someday! Smile

A big thanks to Mr. Peter Lang Cool

- Asiri Rathnayake.

Re: Nested objects' connection handles not working within a compartment [message #760838 is a reply to message #557760]

Mon, 05 December 2011 07:26

Eclipse User

The link to the thread Asiri refers to above is dead, so I am adding the solution that worked for me here. Thanks to pointers from Asiri Smile

The generated plugin.xml in the xxx.diagram project has an extension point="org.eclipse.gmf.runtime.emf.ui.modelingAssistantProviders". The problem was resolved by adding references to the edit parts for the contained nodes under
<modelingAssistantProvider class="IvrBuilder.diagram.providers.Builder3ModelingAssistantProvider">.

By default the generator only adds references to editparts of nodes which are placed directly on the canvas. The generator generates different editparts for nodes that are placed in a container. So even if the .ecore has only one class representing the node e.g. MyNode, two independent editparts will be generated if that node can exist both on the canvas and in a container e.g. MyNodeEditPart and MyNode2EditPart. The generator will only add a reference to the first generated editpart (something like <object class="MyEditor.diagram.edit.parts.MyNodeEditPart" id="MyNode_2004"/>), the second contained one needed to be added manually.

If anyone knows of a way to have these added automatically by the generator, please update this thread

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