def addLayer(self,
uri,
fileName,
layerId,
group=None,
visible=False,
expanded=False):
theLayer = None
# read QGIS project
doc, _ = self.getQgsDoc(fileName)
# is project in relative path ?
absolute = is_absolute(doc)
trusted = project_trusted(doc)
node = getFirstChildByTagNameValue(doc.documentElement(), "maplayer",
"id", layerId)
node = node.cloneNode()
if node:
idNode = node.namedItem("id")
layerType = node.toElement().attribute("type", "vector")
# give it a new id (for multiple import)
newLayerId = "L%s" % re.sub("[{}-]", "",
QUuid.createUuid().toString())
try:
idNode.firstChild().toText().setData(newLayerId)
except Exception:
pass
# if relative path, adapt datasource
if not absolute:
try:
datasourceNode = node.namedItem("datasource")
ds = datasourceNode.firstChild().toText().data()
providerNode = node.namedItem("provider")
provider = providerNode.firstChild().toText().data()
if provider in ["ogr", "gdal"] and (ds.find(".") == 0):
projectpath = QFileInfo(uri).path()
newlayerpath = projectpath + "/" + ds
datasourceNode.firstChild().toText().setData(
newlayerpath)
except Exception:
pass
# read modified layer node
if self.optionCreateGroup and group is not None:
if layerType == "raster":
theLayer = QgsRasterLayer()
else:
theLayer = QgsVectorLayer()
theLayer.setReadExtentFromXml(trusted)
theLayer.readLayerXml(node.toElement(), QgsReadWriteContext())
# Special process if the plugin "DB Style Manager" is installed
flag = "use_db_style_manager_in_custom_menu" in os.environ
if flag and "db-style-manager" in plugins:
try:
plugins["db-style-manager"].load_style_from_database(
theLayer)
except Exception:
self.log("DB-Style-Manager failed to load the style.")
# needed
QgsProject.instance().addMapLayer(theLayer, False)
# add to group
treeNode = group.insertLayer(0, theLayer)
treeNode.setExpanded(expanded)
treeNode.setItemVisibilityChecked(visible)
else:
# create layer
theLayer = QgsProject.instance().readLayer(node)
return QgsProject.instance().mapLayer(newLayerId)
else:
self.log("{} not found".format(layerId))
return None
