Factorio Forums

Posted: **Fri Oct 29, 2021 4:50 pm**

I am listening to the on_gui_opened event in my control.lua and have some behaviour I do not understand. Some sample code below:

Code: Select all

script.on_event(defines.events.on_gui_opened, function(event)
    game.print("called on_gui_opened")
    game.print(event.item)
    game.print(event.gui_type)
end)

If I right click some power armor in my main inventory then the event.item is a 'LuaItemStack' and event.gui.type is '5' (defines.gui_type.item). If I right click some power armor in a chest then event.item is 'nil' and event.gui.type is '5' (defines.gui_type.item). Both times the equipment grid is displayed as normal.

What I don't understand is where the armor is placed seems to make a difference to the event.item value. Isn't a chest just a LuaInventory (and the power armor a LuaItemStack), in the same way the player main inventory is?

This has come about as I would like to know which armor an equipment grid has been opened for.

Thanks in advance!

Posted: **Sat Oct 30, 2021 1:38 am**

Code: Select all

local item = game.players[event.player_index].opened

Posted: **Sat Oct 30, 2021 10:03 am**

That will return the LuaEquipmentGrid. Any way to find out which armor item the grid it is owned by?

Posted: **Sat Oct 30, 2021 2:38 pm**

Did some more testing on this. Only armor opened from the players main inventory or the armor currently worn will set the item in the on_gui_opened event. Any armor in a chest, car, tank, spidertron or inventory created on the game object (using create_inventory()) will not set the item in the on_gui_opened_event.

Furthermore if you set player.opened to an armor itemstack that is in the main inventory via a script, then the item will be set in the on_gui_opened_event. Trying this with an itemstack that exists in a custom inventory for example, the item will not be set in the on_gui_opened_event (i.e. behaviour seems to be the same as the above paragraph).

I am not sure if this is intended behaviour, or a bug.

I have figured out a workaround for this though. I can detect which entity is opened i.e. the chest, I can then detect when an equipment grid is opened. I can loop through the item stacks in the entity and compare their equipment grids with the one opened and it gives me the correct armor itemstack.

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on_gui_opened Event

on_gui_opened Event

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