Set Layer as Master Layer

1

Hi! How can I make a secondary layer to be the master layer via a script? Is it based on the order on the ID or what?

Thanks!

2

The layerId and the associatedMasterId have to be the same.

3

And could you please give me some extra info on how should I proceed? Because if I just change the id of the layer for the associatedMasterId Glyphs crashes I assume this happens because two layers has the same id or something like that.

4

This is code that runes when you make a layer the master in the Layer panel:

if not Layer.isMasterLayer:
	glyph = Layer.parent
	oldMaster = glyph.layers[Layer.associatedMasterId]
	if oldMaster:
		layers = glyph.pyobjc_instanceMethods.layers().copy()
		del(layers[oldMaster.layerId])
		oldMaster.name = "oldMaster"
		oldMaster.layerId = NSString.UUID()
		layers[oldMaster.layerId] = oldMaster
		del(layers[Layer.layerId])
		Layer.layerId = Layer.associatedMasterId
		layers[Layer.layerId] = Layer
		glyph.layers = layers