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Use this when layers are added, deleted, or their order is changed. Can you get a signal when a layer name is changed?

QgsProject.instance().legendLayersAdded.connect(self.polygonList) QgsProject.instance().layerRemoved.connect(self.polygonList) QgsProject.instance().layerTreeRoot().layerOrderChanged.connect(self.polygonList)
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  • @Taras nameChanged of QgsMapLayer is related to specific layer, not to layer tree. I guess OP asks how to get a signal when any layer name has changed. Commented Aug 20, 2023 at 21:00

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Use the nameChanged signal of QgsLayerTreeNode class.

from qgis.core import QgsProject def name_changed(node, name): print(f"New Name: {name}") QgsProject.instance().layerTreeRoot().nameChanged.connect(name_changed)

It also works on groups. Therefore, you may need to check if it is a layer.

from qgis.core import QgsProject, QgsLayerTreeLayer def name_changed(node, name): if isinstance(node, QgsLayerTreeLayer): # <-- print(f"New Name: {name}") QgsProject.instance().layerTreeRoot().nameChanged.connect(name_changed)
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