I can add a text annotation to a sequence flow

[falko]

Is your feature request related to a problem? Please describe.

Currently, text annotations can't be added to sequence flows. It is allowed by the BPMN 2.0 spec, though:

Describe the solution you'd like

Make it possible to connect and add text annotations to a sequence flow.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

This has to be added to bpmn-js (rules and context pad action).

[davidrwerner]

Number one reason I'm avoiding using Camunda fyi. My colleagues and I would prefer to create and pass distribute proposed flows but there's no easy way to add feedback within the spec itself.

[falko]

You could also work with the document attribute.

[barmac]

I tried to implement this but then discovered that it's too complex for spring cleaning. We can tackle this later but need to make sure that we don't introduce bugs.

In bpmn-js, it's easy:

• remove this line
• add context pad entry

However, this requires also a new concept in diagram-js: connecting connections.
In diagram-js, there are two basic types of objects: shapes and connections. The layouting utils are built on an assumption that we always connect shapes with each other. In this case, however, we need to connect a Text Annotation to a Sequence Flow. This breaks the assumption and leads to errors.

I am afraid that even if I implement it now, we may expect crashes in some other places where we take the same assumption but which I haven't discovered yet.

[falko]

@barmac thanks for giving it a try. This limitation of diagram-js will also affect the implementation of #1707.

[jurgenhaas]

We'd be interested in this enhancement too. The mentioned workaround with the document attribute doesn't work for us, as we use templates and as soon as a template is assigned, the document attribute disappears.