Ghost elements are not visible

[Mc-Hoyos]

I have added ghost elements to the palette items on the server side but when I click on the palette button I can't see the ghost element.
I have checked the html elements tree and the ghost element has been added to the dom, but has the css class 'hidden'. Looking at the code this class is indeed added when the ghost element is first created. How to avoid the hiden class to be added or what am I missing to make the ghost elements show?

Thanks,

[martin-fleck-at]

Very interesting! You are right, the ghost element is created as hidden but should be visible as soon as you start moving the mouse, see the listener implementation. Do you have a customization of any of those methods maybe?

[Mc-Hoyos]

Nope, I have not modified or extended the listener implementation. Maybe the issue is that the listener is not being registered?
If you provide any pointers I can try to debug more and provide further information.

[martin-fleck-at]

The listener is subclassed for the ghost element with NodeInsertTrackingListener that is registered when the NodeCreationTool is enabled. So if that code is executed, I'd expect the addMoveFeedback to be called.

[Mc-Hoyos]

Let me do some more checks now that I know where to look and I will report back.

[Mc-Hoyos]

In a related question, what is the difference between providing an GElement vs a TemplateID as the ghost element?

[martin-fleck-at]

These are just two ways to provide a full schema for the ghost element to be created and rendered. If you already provide a schema (e.g., because you start from an empty diagram), we use that directly. Otherwise we take the template id to create a schema from the element you referenced. You can see the related code in templateToSchema.