Be able to create an element from an element template

Is your feature request related to a problem? Please describe

As a user I am able to change an element to an element template of a specific type. I am also able to declare an element template as default; this ensures it is applied as the element is created.

What I am not able to do yet is to create an element of a specific type, i.e. because I want to create it right off the palette or append it:

We have a workaround for what I envision: Bootstrap the element (with all required extensions) manually, cf. ConnectorsExtension. That, however forces me to know all element templates in advance; it is not a solution applicable for general template support.

Describe the solution you’d like

• It is possible to create an element of a specific type similar to ElementFactory#create**, i.e. elementTemplates.createElement(template: ElementTemplate): DiagramElement - The element shall not be added to the canvas yet, but it shall be already configured to the extend needed.

Describe alternatives you’ve considered

Decide this is not a direction we want to go.

Additional context

This pops up in the context of connectors, specifically in the realm of how to integrate them nicely into the existing modeling UX.

[nikku]

To clarify: This feature request is about creating a diagram element of a specific type outside the core modeling cycle.

The use-case is that I want to pull that element out from the palette (into “hover state”), and preview it accordingly (or add it using existing modeling APIs).

Hope this answers your question.

[pinussilvestrus]

Along with our Reflect & Plan, and given our current priorities (Web Modeler & Connectors), I will descope the API for Camunda Platform for now. We can (easily) add the same foundations to the element-templates provider once we need it. I added another issue for that: https://github.com/bpmn-io/bpmn-js-properties-panel/issues/607