Where can I hook into GLSP diagram user interaction events?

[glsp-bot]

Again, I've looked at the coffee editor frontend TypeScript, but I'm still lost. I want to intercept a double-click on a node in a GLSP diagram and take some action. I can't figure out where to put event handling code like that. Any help? Sorry for my lack of understanding and TIA.

original thread by GaryKopp

[planger]

To handle client interactions like mouse clicks etc. you need to register a client tool and react by sending actions which then can either be handled on the client by registering an action handler there, or by registering the server as a handler for that action.
There are a few examples for registering a client action is in the glsp client core, such as https://github.com/eclipse-glsp/glsp-client/blob/master/packages/client/src/features/edit-label/edit-label-tool.ts
The only difference is that you register such a tool only in your language-specific DI module.
There is also an example for registering a client handler (see the usage of configureCommand()):
https://github.com/eclipse-glsp/glsp-client/blob/master/packages/client/src/features/edit-label/di.config.ts
If you instead want to handle the resulting action on the server, you need to register an action handler in the server DI module. The server will then send all action IDs for which handlers are registered in the server via a dedicated message to the client indicating that it wants to get notified and handle such actions.

[glsp-bot]

[GaryKopp]

Thank you very much Philip. I apologize for asking this before actually studying GLSP, which I will do now.