Factorio Forums

Considering `player_index` is listed as optional for on_research_queued, I'm going to assume that writing to LuaForce::research_queue would raise that event.

Also can the research queue even be disabled anymore? I feel like I remember that no longer being a thing. I'm writing code when I should be in bed though, so I'm not going to go down that rabbit hole. I already found out chat messages about research queuing is only printed when there's multiple LuaPlayers (eg removing offline players can make them stop).

Hah found an old improvement request of mine while searching for another one. 111745
Seems like this one is semi-related in that LuaForce::add_research() should be raising the `on_research_queued` event as well instead of the one it currently does. I haven't done any testing to see if the started event actually fires if you're adding to an empty queue though.

Rseding91 wrote: Tue Jun 10, 2025 3:33 pm The index is always the last in the queue so there's no point in including it [in on_research_queued].

Sounds like on_research_queued is not meant to fire when writing to LuaForce::research_queue..
Not sure if that fires an event then.

Also off to go find/make a request for more information in `on_research_moved` and then go to bed