def test_group_layer_updates_from_node(self):
"""
Test that group layer child layers are synced correctly from the group node
"""
group_node = QgsLayerTreeGroup('my group')
options = QgsGroupLayer.LayerOptions(QgsCoordinateTransformContext())
group_layer = group_node.convertToGroupLayer(options)
self.assertFalse(group_layer.childLayers())
layer = QgsVectorLayer("Point?field=fldtxt:string", "layer1", "memory")
group_node.addLayer(layer)
self.assertEqual(group_layer.childLayers(), [layer])
layer2 = QgsVectorLayer("Point?field=fldtxt:string", "layer2",
"memory")
group_node.insertLayer(0, layer2)
self.assertEqual(group_layer.childLayers(), [layer, layer2])
layer3 = QgsVectorLayer("Point?field=fldtxt:string", "layer3",
"memory")
layer4 = QgsVectorLayer("Point?field=fldtxt:string", "layer4",
"memory")
layer3_node = QgsLayerTreeLayer(layer3)
layer4_node = QgsLayerTreeLayer(layer4)
group_node.insertChildNodes(1, [layer3_node, layer4_node])
self.assertEqual(group_layer.childLayers(),
[layer, layer4, layer3, layer2])
layer5 = QgsVectorLayer("Point?field=fldtxt:string", "layer5",
"memory")
layer5_node = QgsLayerTreeLayer(layer5)
group_node.addChildNode(layer5_node)
self.assertEqual(group_layer.childLayers(),
[layer5, layer, layer4, layer3, layer2])
group_node.removeChildNode(layer3_node)
self.assertEqual(group_layer.childLayers(),
[layer5, layer, layer4, layer2])
group_node.removeLayer(layer)
self.assertEqual(group_layer.childLayers(), [layer5, layer4, layer2])
group_node.removeChildren(0, 2)
self.assertEqual(group_layer.childLayers(), [layer5])
group_node.removeAllChildren()
self.assertEqual(group_layer.childLayers(), [])
def groupSelected(self):
nodes = self.mView.selectedNodes(True)
if len(nodes) < 2 or not QgsLayerTree.isGroup(nodes[0].parent()):
return
parentGroup = nodes[0].parent()
insertIdx = parentGroup.children().index(nodes[0])
newGroup = QgsLayerTreeGroup(self.uniqueGroupName(parentGroup))
for node in nodes:
newGroup.addChildNode(node.clone())
parentGroup.insertChildNode(insertIdx, newGroup)
for node in nodes:
group = node.parent()
if group != None:
group.removeChildNode(node)
self.mView.setCurrentIndex(
self.mView.layerTreeModel().node2index(newGroup))