def testSaveFields(self):
# Create a new memory layer with no fields
myMemoryLayer = QgsVectorLayer(('Point?crs=epsg:4326&index=yes'),
'test', 'memory')
# Add some fields to the layer
myFields = [
QgsField('TestInt', QVariant.Int, 'integer', 2, 0),
QgsField('TestDbl', QVariant.Double, 'double', 8, 6),
QgsField('TestString', QVariant.String, 'string', 50, 0),
QgsField('TestDate', QVariant.Date, 'date'),
QgsField('TestTime', QVariant.Time, 'time'),
QgsField('TestDateTime', QVariant.DateTime, 'datetime')
]
assert myMemoryLayer.startEditing()
for f in myFields:
assert myMemoryLayer.addAttribute(f)
assert myMemoryLayer.commitChanges()
myMemoryLayer.updateFields()
# Export the layer to a layer-definition-XML
qlr = QgsMapLayer.asLayerDefinition([myMemoryLayer])
assert qlr is not None
# Import the layer from the layer-definition-XML
layers = QgsMapLayer.fromLayerDefinition(qlr)
assert layers is not None
myImportedLayer = layers[0]
assert myImportedLayer is not None
# Check for the presence of the fields
importedFields = myImportedLayer.fields()
assert importedFields is not None
for f in myFields:
assert f == importedFields.field(f.name())
def add_layer(layer: QgsMapLayer,
name: str = None,
index: int = -1,
color: typing.Tuple[int, int, int] = None,
size: float = None,
file: str = None,
parent: QgsLayerTreeNode = None,
show_feature_count: bool = True) -> None:
if name:
layer.setName(name)
if isinstance(layer, QgsVectorLayer):
if color or size or file:
update_symbology(layer, color=color, size=size, file=file)
elif isinstance(layer, QgsRasterLayer):
# TODO update symbology
pass
instance = QgsProject.instance()
instance.addMapLayer(layer, False)
layerTreeNode = QgsLayerTreeLayer(layer)
layerTreeNode.setCustomProperty('showFeatureCount', show_feature_count)
parent = parent if parent else instance.layerTreeRoot()
parent.insertChildNode(index, layerTreeNode)
def testSaveFields(self):
# Create a new memory layer with no fields
myMemoryLayer = QgsVectorLayer(
('Point?crs=epsg:4326&index=yes'),
'test',
'memory')
# Add some fields to the layer
myFields = [QgsField('TestInt', QVariant.Int, 'integer', 2, 0),
QgsField('TestDbl', QVariant.Double, 'double', 8, 6),
QgsField('TestString', QVariant.String, 'string', 50, 0),
QgsField('TestDate', QVariant.Date, 'date'),
QgsField('TestTime', QVariant.Time, 'time'),
QgsField('TestDateTime', QVariant.DateTime, 'datetime')]
assert myMemoryLayer.startEditing()
for f in myFields:
assert myMemoryLayer.addAttribute(f)
assert myMemoryLayer.commitChanges()
myMemoryLayer.updateFields()
# Export the layer to a layer-definition-XML
qlr = QgsMapLayer.asLayerDefinition([myMemoryLayer])
assert qlr is not None
# Import the layer from the layer-definition-XML
layers = QgsMapLayer.fromLayerDefinition(qlr)
assert layers is not None
myImportedLayer = layers[0]
assert myImportedLayer is not None
# Check for the presence of the fields
importedFields = myImportedLayer.fields()
assert importedFields is not None
for f in myFields:
assert f == importedFields.field(f.name())
def startConvert(self, layer: QgsMapLayer):
layerName = layer.name()
nodeCoorDict = OrderedDict()
graph = nx.Graph()
if layerName:
features = layer.getFeatures()
count = 0
for feature in features:
if count > 10:
break
geom = feature.geometry()
geomSingleType = QgsWkbTypes.isSingleType(geom.wkbType())
if geom.type() == QgsWkbTypes.PolygonGeometry:
if geomSingleType:
polygon = geom.asPolygon()
else:
multiPolygon = geom.asMultiPolygon()
for polygon in multiPolygon:
nodeCoorDict = self.parsePolygon2Network(
polygon, nodeCoorDict, graph)
count = count + 1
'''
plt.subplot(121)
nx.draw(graph, with_labels=True, font_weight='bold')
plt.show()
'''
return nodeCoorDict
def testSaveFields(self):
# Create a new memory layer with no fields
myMemoryLayer = QgsVectorLayer(("Point?crs=epsg:4326&index=yes"), "test", "memory")
# Add some fields to the layer
myFields = [
QgsField("TestInt", QVariant.Int, "integer", 2, 0),
QgsField("TestLong", QVariant.LongLong, "long", -1, 0),
QgsField("TestDbl", QVariant.Double, "double", 8, 6),
QgsField("TestString", QVariant.String, "string", 50, 0),
QgsField("TestDate", QVariant.Date, "date"),
QgsField("TestTime", QVariant.Time, "time"),
QgsField("TestDateTime", QVariant.DateTime, "datetime"),
]
assert myMemoryLayer.startEditing()
for f in myFields:
assert myMemoryLayer.addAttribute(f)
assert myMemoryLayer.commitChanges()
myMemoryLayer.updateFields()
# Export the layer to a layer-definition-XML
qlr = QgsMapLayer.asLayerDefinition([myMemoryLayer])
assert qlr is not None
# Import the layer from the layer-definition-XML
layers = QgsMapLayer.fromLayerDefinition(qlr)
assert layers is not None
myImportedLayer = layers[0]
assert myImportedLayer is not None
# Check for the presence of the fields
importedFields = myImportedLayer.fields()
assert importedFields is not None
for f in myFields:
assert f == importedFields.field(f.name())
def get_centroid_from_polygon(layerName):
"""Getting centroid from the polygon."""
layerName = "INTERIOR"
layer = QgsMapLayer.instance().mapLayersByName(layerName)[0]
print("layer.name---->", layer.name())
epsg = layer.crs().postgisSrid()
uri = "Point?crs=epsg:" + str(epsg) + "&field=id:integer" "&index=yes"
mem_layer = QgsVectorLayer(uri, 'point', 'memory')
prov = mem_layer.dataProvider()
i = 0
for f in layer.getFeatures():
feat = QgsFeature()
pt = f.geometry().centroid().asPoint()
print("pt---->", pt)
feat.setAttributes([i])
feat.setGeometry(QgsGeometry.fromPoint(pt))
prov.addFeatures([feat])
i += 1
QgsMapLayer.instance().addMapLayer(mem_layer)
def fetch_and_apply_style(layer: QgsMapLayer,
url: str,
style_attr: str = '') -> Optional[str]:
"""
Fetches a QML style from the specified URL, and applies it to a layer.
@param layer: target layer to apply style to
@param url: URL for QML content
@param style_attr: optional str specifying name of existing field in layer to automatically
update classified references to
@return: Returns a str if an error occurred, or None if the fetch and apply was successful
"""
request = QgsBlockingNetworkRequest()
if request.get(QNetworkRequest(
QUrl(url))) != QgsBlockingNetworkRequest.NoError:
return 'Error while fetching QML style: {}'.format(
request.errorMessage())
reply = request.reply().content()
tmp_file = QTemporaryFile('{}/XXXXXX.qml'.format(QDir.tempPath()))
tmp_file.open()
tmp_file_name = tmp_file.fileName()
tmp_file.close()
with open(tmp_file_name, 'wt', encoding='utf8') as f:
f.write(reply.data().decode())
layer.loadNamedStyle(tmp_file_name)
if style_attr:
StyleUtils.update_class_attribute(layer, style_attr)
layer.triggerRepaint()
return None
def __init__(self,
level: Level,
feedback_result: FeedbackResult,
layer: QgsMapLayer = None) -> None:
self.level = level
self.message = feedback_result.message
self.layer_id = layer.id() if layer else None
self.layer_name = layer.name() if layer else None
def layer_summary(layer_id: str, layer: QgsMapLayer):
return dict(
id=layer_id,
name=layer.name(),
source=layer.publicSource(),
crs=layer.crs().userFriendlyIdentifier(),
valid=layer.isValid(),
spatial=layer.isSpatial(),
)
def is_compatible_with_layer(self, layer: QgsMapLayer, is_editable: bool):
if layer is None:
return False
if layer.type() != QgsMapLayerType.VectorLayer:
return False
return layer.geometryType(
) == QgsWkbTypes.PointGeometry and is_editable
def add_report_to_layer(report: typing.Dict, layer: QgsMapLayer):
history_msg = (f'{report["generated"]} - Validation report: '
f'{"Valid" if report["dataset_is_valid"] else "Invalid"}')
abstract_msg = utils.serialize_report_to_plain_text(report)
metadata: QgsLayerMetadata = layer.metadata()
history: typing.List = metadata.history()
history.append(history_msg)
abstract: str = metadata.abstract()
abstract = "\n\n---\n\n".join((abstract, abstract_msg))
metadata.setAbstract(abstract)
metadata.setHistory(history)
layer.setMetadata(metadata)
def layer_name_source(layer: QgsMapLayer) -> Tuple[str, str]:
"""
Returns the name and the source path of the layer.
:param layer: the layer from which to extract name and source.
:type layer: QgsMapLayer.
:return: the layer name and source.
:rtype: tuple of two strings.
Examples:
"""
return layer.name(), layer.source()
def startConvert(self,layer:QgsMapLayer):
layerName = layer.name()
nodeCoorDict = OrderedDict()
graph = nx.Graph()
if layerName:
features_forCounts = layer.getFeatures() # type:QgsFeatureIterator
# 记录当前处理的polygon id编号
plyId = 0
count = 0
feaNums = sum(1 for _ in features_forCounts) #此时已经迭代过了
features = layer.getFeatures() # type:QgsFeatureIterator
pbar = self.dlg.progressBar # type:QProgressBar
pbar.setRange(0, feaNums)
print(feaNums)
for feature in features:
#if count >= 10:
# break
geom = feature.geometry()
geomSingleType = QgsWkbTypes.isSingleType(geom.wkbType())
if geom.type() == QgsWkbTypes.PolygonGeometry:
if geomSingleType:
polygon = geom.asPolygon()
nodeCoorDict, graph = self.parsePolygon2Network(polygon, nodeCoorDict, graph, plyId=plyId)
plyId = plyId + 1
else:
multiPolygon = geom.asMultiPolygon()
for polygon in multiPolygon:
nodeCoorDict,graph = self.parsePolygon2Network(polygon,nodeCoorDict,graph,plyId=plyId)
plyId = plyId + 1
pbar.setValue(count)
count = count + 1
#print("complete!")
#plt.subplot(121)
#print(nodeCoorDict)
'''
# 每个节点坐标，绘制带坐标的图
pos = list(nodeCoorDict.values())
#nx.draw(graph,pos, with_labels=True)
nx.draw(graph, pos,node_size=20)
nx.fruchterman_reingold_layout(graph)
plt.show()
'''
print('all complete')
pbar.setValue(feaNums)
return nodeCoorDict,graph,True
def on_current_layer_changed(self, map_layer: QgsMapLayer) -> None:
"""
slot for checking selection changes
:param map_layer:
:return: Nothing
"""
if self.__active_layer is not None:
try:
self.__active_layer.geometryChanged.disconnect(
self.on_geometry_changed)
self.__active_layer.selectionChanged.disconnect(
self.on_active_layer_selection_changed)
except AttributeError:
pass
except TypeError:
pass
if (map_layer is None) or (map_layer.type() !=
QgsMapLayer.VectorLayer):
self.__active_layer = None
else:
self.__active_layer = map_layer
self.__active_layer.geometryChanged.connect(
self.on_geometry_changed)
self.__active_layer.selectionChanged.connect(
self.on_active_layer_selection_changed)
self._parse_selection()
def enable_actions_for_layer(self,
layer: QgsMapLayer,
forced_edit_state=None):
"""
Toggles whether actions should be enabled for the specified layer
"""
is_editable = forced_edit_state
if is_editable is None:
if isinstance(layer, QgsVectorLayer):
is_editable = layer.isEditable()
else:
is_editable = False
for action in self.actions:
if sip.isdeleted(action):
continue
if self.tools.get(action.data()):
tool = self.tools[action.data()]
action.setEnabled(
tool.is_compatible_with_layer(layer, is_editable))
if tool == self.active_tool and not action.isEnabled():
self.iface.mapCanvas().unsetMapTool(tool)
self.iface.actionPan().trigger()
def update_symbology(layer: QgsMapLayer,
color: typing.Tuple[int, int, int] = None,
size: float = None,
file: str = None) -> None:
assert layer, 'Layer is not defined'
if file:
assert isinstance(file, str)
(msg, noError) = layer.loadNamedStyle(file)
if not noError:
raise Exception(msg)
renderer = layer.renderer()
symbol = None
if isinstance(renderer, QgsSingleSymbolRenderer):
symbol = renderer.symbol()
elif isinstance(renderer, QgsGraduatedSymbolRenderer):
symbol = renderer.sourceSymbol()
else:
raise Exception('Unknown renderer!')
if color:
assert isinstance(
color, collections.abc.Sequence
), 'Color should be a iteratable of three numbers for Red, Green, Blue; Each of them between 0 and 255'
assert len(color) in (
3, 4
), 'There should be three numbers passed for Red, Green, Blue; Each of them between 0 and 255'
symbol.setColor(QColor.fromRgb(*color))
if size:
# For lines
if type(symbol) == QgsLineSymbol:
symbol.setWidth(size)
# For points
if type(symbol) == QgsMarkerSymbol:
symbol.setSize(size)
layer.triggerRepaint()
iface.layerTreeView().refreshLayerSymbology(layer.id())
def print_layer_name(self, layer: QgsMapLayer):
try:
LOGGER.info(tr("Printing layer name"),
extra=bar_msg(tr("Layer name is {}", layer.name())))
except:
raise QgsPluginException("Error occured",
bar_msg("Select layer first!"))
def check_layer_is_geopackage(layer: QgsMapLayer) -> Tuple[bool, str]:
if not layer:
return False, 'La couche est invalide'
testing = os.environ.get('TESTING_MERCICOR', '')
if testing == 'True':
return True, ''
uri = QgsProviderRegistry.instance().decodeUri('ogr', layer.source())
if not uri['path'].lower().endswith('.gpkg') or not uri['layerName']:
message = (
'La couche doit être le geopackage de la zone d\'étude et non pas {}'
.format(layer.source()))
return False, message
return True, ''
def addLayers(self, layers):
"""Handle layers being added to the registry so they show up in canvas.
:param layers: list<QgsMapLayer> list of map layers that were added
.. note:: The QgsInterface api does not include this method,
it is added here as a helper to facilitate testing.
"""
#LOGGER.debug('addLayers called on qgis_interface')
#LOGGER.debug('Number of layers being added: %s' % len(layers))
#LOGGER.debug('Layer Count Before: %s' % len(self.canvas.layers()))
current_layers = self.canvas.layers()
final_layers = []
for layer in current_layers:
final_layers.append(QgsMapLayer(layer))
for layer in layers:
final_layers.append(QgsMapLayer(layer))
self.canvas.setLayerSet(final_layers)
def getConnectionParameterFromDbLayer(layer: QgsMapLayer) -> Dict[str,str]:
'''
Get connection parameters
from the layer datasource
'''
connectionParams = None
if layer.providerType() == 'postgres':
dbType = 'postgis'
else:
dbType = 'spatialite'
src = layer.source()
try:
uri = QgsDataSourceUri(src)
except:
uri = QgsDataSourceURI(src)
# TODO Use immutable namedtuple
connectionParams = {
'service' : uri.service(),
'dbname' : uri.database(),
'host' : uri.host(),
'port': uri.port(),
'user' : uri.username(),
'password': uri.password(),
'sslmode' : uri.sslMode(),
'key': uri.keyColumn(),
'estimatedmetadata' : str(uri.useEstimatedMetadata()),
'checkPrimaryKeyUnicity' : '',
'srid' : uri.srid(),
'type': uri.wkbType(),
'schema': uri.schema(),
'table' : uri.table(),
'geocol' : uri.geometryColumn(),
'sql' : uri.sql(),
'dbType': dbType
}
return connectionParams
def layer_from_source(source_uri, name):
"""Return QgsMapLayer from a given source uri.
:param source_uri: A source URI
:type source_uri: basestring
:param name: Designated layer name
:type name: basestring
:return: QgsMapLayer
:rtype: qgis.core.QgsMapLayer
"""
vector_extensions = ('shp', 'geojson')
raster_extensions = ('asc', 'tiff', 'tif', 'geotiff', 'geotif')
qlr_extensions = ('qlr', )
qgis_layer = None
if is_file_path(source_uri):
# sanitize source_uri
sanitized_uri = urllib.unquote(source_uri).decode('utf-8')
sanitized_uri.replace('file://', '')
if source_uri.endswith(vector_extensions):
qgis_layer = QgsVectorLayer(sanitized_uri, name, 'ogr')
elif source_uri.endswith(raster_extensions):
qgis_layer = QgsRasterLayer(sanitized_uri, name)
elif source_uri.endswith(qlr_extensions):
qgis_layer = QgsMapLayer.fromLayerDefinitionFile(sanitized_uri)
if qgis_layer:
qgis_layer = qgis_layer[0]
qgis_layer.setName(name)
elif is_tile_path(source_uri):
# sanitize source_uri
sanitized_uri = urllib.unquote(source_uri).decode('utf-8')
# Check if it is only a url
if sanitized_uri.startswith(('http://', 'https://')):
# Then it is probably a tile xyz url
sanitized_uri = 'type=xyz&url={0}'.format(sanitized_uri)
# It might be in the form of query string
query_params = urlparse.parse_qs(sanitized_uri)
driver = query_params.get('driver', 'wms')
qgis_layer = QgsRasterLayer(sanitized_uri, name, driver)
return qgis_layer
def _set_output_layer_style(layerName: str, layer: QgsMapLayer,
alg: QgsProcessingAlgorithm,
details: 'QgsProcessingContext::LayerDetails',
context: QgsProcessingContext, parameters) -> None:
""" Set layer style
Original code is from python/plugins/processing/gui/Postprocessing.py
"""
'''If running a model, the execution will arrive here when an algorithm that is part of
that model is executed. We check if its output is a final otuput of the model, and
adapt the output name accordingly'''
outputName = details.outputName
if parameters:
expcontext = QgsExpressionContext()
scope = QgsExpressionContextScope()
expcontext.appendScope(scope)
for out in alg.outputDefinitions():
if out.name() not in parameters:
continue
outValue = parameters[out.name()]
if hasattr(outValue, "sink"):
outValue = outValue.sink.valueAsString(expcontext)[0]
else:
outValue = str(outValue)
if outValue == layerName:
outputName = out.name()
break
style = None
if outputName:
# If a style with the same name as the outputName exists
# in workdir then use it
style = os.path.join(context.workdir, outputName + '.qml')
if not os.path.exists(style):
style = RenderingStyles.getStyle(alg.id(), outputName)
LOGGER.debug("Getting style for %s: %s <%s>", alg.id(), outputName,
style)
# Get defaults styles
if style is None:
if layer.type() == QgsMapLayer.RasterLayer:
style = ProcessingConfig.getSetting(ProcessingConfig.RASTER_STYLE)
else:
if layer.geometryType() == QgsWkbTypes.PointGeometry:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_POINT_STYLE)
elif layer.geometryType() == QgsWkbTypes.LineGeometry:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_LINE_STYLE)
else:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_POLYGON_STYLE)
if style:
LOGGER.debug("Adding style '%s' to layer %s (outputName %s)", style,
details.name, outputName)
layer.loadNamedStyle(style)
LOGGER.debug("Layer name set to %s <details name: %s>", layer.name(),
details.name)
def create_default_project(available_maps, visible_maps, project_template, authcfg=None):
"""Create a default project from a template and return it as a string"""
layers = []
for m in available_maps:
connstring = u'type=xyz&url=%(url)s'
if authcfg is not None:
connstring = u'authcfg=%(authcfg)s&' + connstring
layer = QgsRasterLayer(connstring % {
'url': quote(m['endpoint']),
'authcfg': authcfg,
}, m['name'], 'wms')
# I've no idea why the following is required even if the crs is specified
# in the layer definition
layer.setCrs(QgsCoordinateReferenceSystem('EPSG:3857'))
layers.append(layer)
if len(layers):
xml = QgsMapLayer.asLayerDefinition(layers)
maplayers = "\n".join(xml.toString().split("\n")[3:-3])
layer_tree_layer = ""
custom_order = ""
legend_layer = ""
layer_coordinate_transform = ""
for layer in layers:
is_visible = layer.name() in visible_maps
values = {'name': layer.name(), 'id': layer.id(), 'visible': ('1' if is_visible else '0'), 'checked': ('Qt::Checked' if is_visible else 'Qt::Unchecked')}
custom_order += "<item>%s</item>" % layer.id()
layer_tree_layer += """
<layer-tree-layer expanded="1" checked="%(checked)s" id="%(id)s" name="%(name)s">
<customproperties/>
</layer-tree-layer>""" % values
legend_layer += """
<legendlayer drawingOrder="-1" open="true" checked="%(checked)s" name="%(name)s" showFeatureCount="0">
<filegroup open="true" hidden="false">
<legendlayerfile isInOverview="0" layerid="%(id)s" visible="%(visible)s"/>
</filegroup>
</legendlayer>""" % values
layer_coordinate_transform += '<layer_coordinate_transform destAuthId="EPSG:3857" srcAuthId="EPSG:3857" srcDatumTransform="-1" destDatumTransform="-1" layerid="%s"/>' % layer.id()
tpl = ""
with open(project_template, 'rb') as f:
tpl = f.read()
for tag in ['custom_order', 'layer_tree_layer', 'legend_layer', 'layer_coordinate_transform', 'maplayers']:
tpl = tpl.replace("#%s#" % tag.upper(), locals()[tag])
return tpl
else:
return None
def createDefaultProject(available_maps, visible_maps, project_template, authcfg=None):
"""Create a default project from a template and return it as a string"""
layers = []
for m in available_maps:
connstring = u'type=xyz&url={url}'
if authcfg is not None:
connstring = u'authcfg={authcfg}&' + connstring
layer = QgsRasterLayer(connstring.format(url=urllib2.quote("{}?version={}".format(m['endpoint'], pluginSetting("apiVersion"))),
authcfg=authcfg), m['name'], "wms")
# I've no idea why the following is required even if the crs is specified
# in the layer definition
layer.setCrs(QgsCoordinateReferenceSystem('EPSG:3857'))
layers.append(layer)
if len(layers):
xml = QgsMapLayer.asLayerDefinition(layers)
maplayers = "\n".join(xml.toString().split("\n")[3:-3])
layer_tree_layer = ""
custom_order = ""
legend_layer = ""
layer_coordinate_transform = ""
for layer in layers:
is_visible = layer.name() in visible_maps
values = {'name': layer.name(), 'id': layer.id(), 'visible': ('1' if is_visible else '0'), 'checked': ('Qt::Checked' if is_visible else 'Qt::Unchecked')}
custom_order += "<item>%s</item>" % layer.id()
layer_tree_layer += """
<layer-tree-layer expanded="1" checked="%(checked)s" id="%(id)s" name="%(name)s">
<customproperties/>
</layer-tree-layer>""" % values
legend_layer += """
<legendlayer drawingOrder="-1" open="true" checked="%(checked)s" name="%(name)s" showFeatureCount="0">
<filegroup open="true" hidden="false">
<legendlayerfile isInOverview="0" layerid="%(id)s" visible="%(visible)s"/>
</filegroup>
</legendlayer>""" % values
layer_coordinate_transform += '<layer_coordinate_transform destAuthId="EPSG:3857" srcAuthId="EPSG:3857" srcDatumTransform="-1" destDatumTransform="-1" layerid="%s"/>' % layer.id()
tpl = ""
with open(project_template, 'rb') as f:
tpl = f.read()
for tag in ['custom_order', 'layer_tree_layer', 'legend_layer', 'layer_coordinate_transform', 'maplayers']:
tpl = tpl.replace("#%s#" % tag.upper(), locals()[tag])
return tpl
else:
return None
def __add_layer_definition_file(self, file_name, root_group):
"""
shamelessly copied from
https://github.com/qgis/QGIS/blob/master/src/core/qgslayerdefinition.cpp
"""
qfile = QFile(file_name)
if not qfile.open(QIODevice.ReadOnly):
return None
doc = QDomDocument()
if not doc.setContent(qfile):
return None
file_info = QFileInfo(qfile)
QDir.setCurrent(file_info.absoluteDir().path())
root = QgsLayerTreeGroup()
ids = doc.elementsByTagName('id')
for i in range(0, ids.size()):
id_node = ids.at(i)
id_elem = id_node.toElement()
old_id = id_elem.text()
layer_name = old_id[:-17]
date_time = QDateTime.currentDateTime()
new_id = layer_name + date_time.toString('yyyyMMddhhmmsszzz')
id_elem.firstChild().setNodeValue(new_id)
tree_layer_nodes = doc.elementsByTagName('layer-tree-layer')
for j in range(0, tree_layer_nodes.count()):
layer_node = tree_layer_nodes.at(j)
layer_elem = layer_node.toElement()
if old_id == layer_elem.attribute('id'):
layer_node.toElement().setAttribute('id', new_id)
layer_tree_elem = doc.documentElement().firstChildElement(
'layer-tree-group')
load_in_legend = True
if not layer_tree_elem.isNull():
root.readChildrenFromXML(layer_tree_elem)
load_in_legend = False
layers = QgsMapLayer.fromLayerDefinition(doc)
QgsProject.instance().addMapLayers(layers, load_in_legend)
nodes = root.children()
for node in nodes:
root.takeChild(node)
del root
root_group.insertChildNodes(-1, nodes)
return None
def add_layer_metadata(map_layer: qgc.QgsMapLayer, layer_cfg: Layer) -> None:
"""Add layer metadata.
Renders a jinja template to a temporary file location as a valid QGIS qmd
metadata file. This metadata then gets associated with the `map_layer` using
its `loadNamedMetadata` method. This metadata gets written to the project
file when the layer is added to the `project`.
"""
qmd_template = load_template('metadata.jinja')
# Set the layer's tooltip
tooltip = _build_layer_tooltip(layer_cfg)
map_layer.setAbstract(tooltip)
# Render the qmd template.
abstract = escape(build_layer_metadata(layer_cfg))
layer_extent = map_layer.extent()
layer_crs = map_layer.crs()
if layer_cfg.steps:
provenance_list = [escape(step.provenance) for step in layer_cfg.steps]
else:
provenance_list = []
rendered_qmd = qmd_template.render(
provenance_list=provenance_list,
abstract=abstract,
title=layer_cfg.title,
crs_proj4_str=layer_crs.toProj4(),
crs_srsid=layer_crs.srsid(),
crs_postgres_srid=layer_crs.postgisSrid(),
crs_authid=layer_crs.authid(),
crs_description=layer_crs.description(),
crs_projection_acronym=layer_crs.projectionAcronym(),
crs_ellipsoid_acronym=layer_crs.ellipsoidAcronym(),
minx=layer_extent.xMinimum(),
miny=layer_extent.yMinimum(),
maxx=layer_extent.xMaximum(),
maxy=layer_extent.yMaximum(),
)
# Write the rendered tempalte to a temporary file
# location. `map_layer.loadNamedMetadata` expects a string URI corresponding
# to a file on disk.
with tempfile.NamedTemporaryFile('w') as temp_file:
temp_file.write(rendered_qmd)
temp_file.flush()
map_layer.loadNamedMetadata(temp_file.name)
def load_layers(iface):
# Load a dictionary of layerId:layer pairs
layer_dic = QgsProject.instance().layerStore().mapLayers()
# Filter the vector layers (LayerType(0))
vec_dic = dict()
for l in layer_dic:
if layer_dic[l].type() == QgsMapLayer.LayerType(0):
vec_dic[l] = layer_dic[l]
# Further filter those polygon layers (geometryType(2)) which have
# at least 1 feature and add them to the drop down menu.
poly_geom = QgsWkbTypes.GeometryType(2)
poly_dic = dict()
poly_ind = [] # Indices are saved here
for l in vec_dic:
if vec_dic[l].geometryType() == poly_geom and vec_dic[l].featureCount(
) and vec_dic[l].crs().authid() == 'EPSG:31287':
poly_dic[l] = vec_dic[l]
poly_ind.append(l)
return poly_dic, poly_ind
def __getCrs(self,
layer: QgsMapLayer = None) -> QgsCoordinateReferenceSystem:
if layer:
return layer.sourceCrs()
return self.project.crs()
def loadQlrs(qlrList):
for qlr in qlrList:
lyrs = QgsMapLayer.fromLayerDefinitionFile(qlr)
QgsMapLayerRegistry.instance().addMapLayers(lyrs)
def addToDefaultProject(maps, visibleMaps, authcfg=None):
"""Add basemaps to the existing default project"""
layers = []
for m in maps:
connstring = u'type=xyz&url={url}'
if authcfg is not None:
connstring = u'authcfg={authcfg}&' + connstring
layer = QgsRasterLayer(connstring.format(url=urllib2.quote("{}?version={}".format(m['endpoint'], pluginSetting("apiVersion"))),
authcfg=authcfg), m['name'], 'wms')
# I've no idea why the following is required even if the crs is specified
# in the layer definition
layer.setCrs(QgsCoordinateReferenceSystem('EPSG:3857'))
layers.append(layer)
if os.path.isfile(defaultProjectPath()):
backup = defaultProjectPath().replace(
'.qgs', '-%s.qgs' % datetime.now().strftime('%Y-%m-%d-%H_%M_%S'))
shutil.copy2(defaultProjectPath(), backup)
# open default project
with open(defaultProjectPath()) as f:
content = f.read()
doc = QDomDocument()
setOk, errorString, errorLine, errorColumn = doc.setContent(content)
if not setOk:
return False
root = doc.documentElement()
for layer in layers:
is_visible = layer.name() in visibleMaps
xml = QgsMapLayer.asLayerDefinition([layer])
r = xml.documentElement()
mapLayerElement = r.firstChildElement("maplayers").firstChildElement("maplayer")
layerTreeLayerElement = doc.createElement("layer-tree-layer")
layerTreeLayerElement.setAttribute("expanded", "1")
layerTreeLayerElement.setAttribute("checked", "Qt::Checked" if is_visible else "Qt::Unchecked")
layerTreeLayerElement.setAttribute("id", layer.id())
layerTreeLayerElement.setAttribute("name", layer.name())
customPropertiesElement = doc.createElement("customproperties")
layerTreeLayerElement.appendChild(customPropertiesElement)
legendLayerElement = doc.createElement("legendlayer")
legendLayerElement.setAttribute("drawingOrder", "-1")
legendLayerElement.setAttribute("open", "true")
legendLayerElement.setAttribute("checked", "Qt::Checked" if is_visible else "Qt::Unchecked")
legendLayerElement.setAttribute("name", layer.name())
legendLayerElement.setAttribute("showFeatureCount", "0")
filegroupElement = doc.createElement("filegroup")
filegroupElement.setAttribute("open", "true")
filegroupElement.setAttribute("hidden", "false")
legendlayerfileElement = doc.createElement("legendlayerfile")
legendlayerfileElement.setAttribute("isInOverview", "0")
legendlayerfileElement.setAttribute("layerid", layer.id())
legendlayerfileElement.setAttribute("visible", "1" if is_visible else "0")
filegroupElement.appendChild(legendlayerfileElement)
legendLayerElement.appendChild(filegroupElement)
crsElement = doc.createElement("layer_coordinate_transform")
crsElement.setAttribute("destAuthId", "EPSG:3857")
crsElement.setAttribute("srcAuthId", "EPSG:3857")
crsElement.setAttribute("srcDatumTransform", "-1")
crsElement.setAttribute("destDatumTransform", "-1")
crsElement.setAttribute("layerid", layer.id())
itemElement = doc.createElement("item")
text = doc.createTextNode(layer.id())
itemElement.appendChild(text)
e = root.firstChildElement("layer-tree-group")
e.appendChild(layerTreeLayerElement)
e = root.firstChildElement("mapcanvas").firstChildElement("layer_coordinate_transform_info")
e.appendChild(crsElement)
e = root.firstChildElement("layer-tree-canvas").firstChildElement("custom-order")
e.appendChild(itemElement)
e = root.firstChildElement("legend")
e.appendChild(legendLayerElement)
e = root.firstChildElement("projectlayers")
e.appendChild(mapLayerElement)
with open(defaultProjectPath(), "wb+") as f:
f.write(doc.toString(2))
settings = QSettings()
settings.setValue('/qgis/newProjectDefault', True)
return True
def _allowed_layer(lyr: QgsMapLayer) -> bool:
return AllowedValue(value=lyr.name(),
allowed_type=ALLOWEDVALUETYPE.LAYER)
def _load_qml_style(map_layer: qgc.QgsMapLayer, style_path: Path) -> None:
msg, status = map_layer.loadNamedStyle(str(style_path))
if not status:
raise RuntimeError(f"Problem loading '{style_path}': '{msg}'")
def tag_layer_as_stdm_layer(layer: QgsMapLayer):
"""
Tags a map layer as a STDM sourced layer
"""
layer.setCustomProperty(LayerUtils.IS_STDM_LAYER_KEY, True)
def is_layer_stdm_layer(layer: QgsMapLayer) -> bool:
"""
Returns True if the layer is a STDM sourced layer
"""
return bool(layer.customProperty(LayerUtils.IS_STDM_LAYER_KEY))
def add_layer_to_project(layer: QgsMapLayer):
project = QgsProject.instance()
layer_candidates = project.mapLayersByName(layer.name())
if len(layer_candidates) > 0:
project.removeMapLayers(layer_candidates)
project.addMapLayer(layer)