How can I get a list of layers inside a group?

[gamedevshrimp]

Hello, dear community! I trying to learn Aseprite API. I want to iterate through all layers in my sprite.
I found a great solution from Olga_Galvanova

Calling a layer via script by its name inside a for loop

welcome, iiiikoooo. sprite.layer api/sprite.md at main · aseprite/api · GitHub is only array and layer.name api/layer.md at main · aseprite/api · GitHub only serves to get or set the name and it returns a string. so i don’t think sprite.layer.name.isVisible will work. i guess what you want to do is loop through the stack of layers (the array stored in sprite.layers) and ask with if condition if layer.name == "whatevername". if it does meet the requirements, then you set visibility with layer…

However, I noticed this algorithm doesn’t go into a group layer. How I can fix it?
I’ve tried to use app.command.OpenGroup() but doesn’t work for me

[Olga_Galvanova]

hi there, this is a recursive version of that script:

local vis = app.layer 
local visibility = vis.isVisible 
vis.isVisible = not visibility 

function goop(a)
	for _, layer in ipairs(a.layers) do 
		local visible = layer.isVisible
		if visible == visibility then 
			layer.isVisible = not visibility 
		end
		if layer.isGroup then 
			goop(layer) 
		end
	end
end 

if vis.isGroup then 
	goop(vis) 
end

what i do is checking if layer.isGroup and if it is, then i call the function from within itself again.

just one note though: if you plan to edit the stack of layers (for instance if you want to remove one or more of the layers), you need to put them into the table first and then iterate through that table. like in this example by dacap:

Script: sprite.layers

Hi @Olga_Galvanova, this is a common problem when we have to remove elements from a collection that is being iterated. In this case the problem is that we cannot go through the sprite.layers collection and modify it at the same time. My recommendation would be to create a table of layers first, and then iterate that table: local sprite = app.activeSprite local layers = {} for i, layer in ipairs(sprite.layers) do table.insert(layers, layer) end for i, layer in ipairs(layers) do if not layer…

which reminds me i planned make recursive version of delete hidden layers… :E

[gamedevshrimp]

Thank you! It’s literally that I want