def load_layer(self, id, param):
"""
Loads a layer which was specified as parameter.
"""
filepath = self.filepath_from_param(param)
if 'in_place' in param and param['in_place']:
# check if alg modifies layer in place
tmpdir = tempfile.mkdtemp()
self.cleanup_paths.append(tmpdir)
path, file_name = os.path.split(filepath)
base, ext = os.path.splitext(file_name)
for file in glob.glob(os.path.join(path, '{}.*'.format(base))):
shutil.copy(os.path.join(path, file), tmpdir)
filepath = os.path.join(tmpdir, file_name)
self.in_place_layers[id] = filepath
if param['type'] in ('vector', 'table'):
if filepath in self.vector_layer_params:
return self.vector_layer_params[filepath]
options = QgsVectorLayer.LayerOptions()
options.loadDefaultStyle = False
lyr = QgsVectorLayer(filepath, param['name'], 'ogr', options)
self.vector_layer_params[filepath] = lyr
elif param['type'] == 'raster':
options = QgsRasterLayer.LayerOptions()
options.loadDefaultStyle = False
lyr = QgsRasterLayer(filepath, param['name'], 'gdal', options)
self.assertTrue(lyr.isValid(), 'Could not load layer "{}" from param {}'.format(filepath, param))
QgsProject.instance().addMapLayer(lyr)
return lyr
def __input_raster_layer():
options = QgsRasterLayer.LayerOptions()
options.loadDefaultStyle = False
return QgsRasterLayer(os.path.join(AlgorithmsTestBase.processingTestDataPath(), 'raster.tif'),
"raster_input",
'gdal',
options)
def createXYZLayer(self, layerType, name):
# create XYZ layer with tms url as uri
provider = 'wms'
url = "type=xyz&url=" + layerType.xyzUrlConfig()
layer = QgsRasterLayer(url, name, provider,
QgsRasterLayer.LayerOptions())
layer.setCustomProperty('ol_layer_type', layerType.layerTypeName)
return layer, layerType.xyzUrlConfig()
def testTransformContextIsSetInCtor(self):
"""Test transform context can be set from ctor"""
rl = QgsRasterLayer(self.rpath, 'raster')
self.assertFalse(rl.transformContext().hasTransform(QgsCoordinateReferenceSystem(4326), QgsCoordinateReferenceSystem(3857)))
options = QgsRasterLayer.LayerOptions(transformContext=self.ctx)
rl = QgsRasterLayer(self.rpath, 'raster', 'gdal', options)
self.assertTrue(rl.transformContext().hasTransform(QgsCoordinateReferenceSystem(4326), QgsCoordinateReferenceSystem(3857)))
def load(fileName, name=None, crs=None, style=None, isRaster=False):
"""
Loads a layer/table into the current project, given its file.
.. deprecated:: 3.0
Do not use, will be removed in QGIS 4.0
"""
from warnings import warn
warn("processing.load is deprecated and will be removed in QGIS 4.0",
DeprecationWarning)
if fileName is None:
return
if name is None:
name = os.path.split(fileName)[1]
if isRaster:
options = QgsRasterLayer.LayerOptions()
options.skipCrsValidation = True
qgslayer = QgsRasterLayer(fileName, name, 'gdal', options)
if qgslayer.isValid():
if crs is not None and qgslayer.crs() is None:
qgslayer.setCrs(crs, False)
if style is None:
style = ProcessingConfig.getSetting(
ProcessingConfig.RASTER_STYLE)
qgslayer.loadNamedStyle(style)
QgsProject.instance().addMapLayers([qgslayer])
else:
raise RuntimeError(
QCoreApplication.translate(
'dataobject',
'Could not load layer: {0}\nCheck the processing framework log to look for errors.'
).format(fileName))
else:
options = QgsVectorLayer.LayerOptions()
options.skipCrsValidation = True
qgslayer = QgsVectorLayer(fileName, name, 'ogr', options)
if qgslayer.isValid():
if crs is not None and qgslayer.crs() is None:
qgslayer.setCrs(crs, False)
if style is None:
if qgslayer.geometryType() == QgsWkbTypes.PointGeometry:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_POINT_STYLE)
elif qgslayer.geometryType() == QgsWkbTypes.LineGeometry:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_LINE_STYLE)
else:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_POLYGON_STYLE)
qgslayer.loadNamedStyle(style)
QgsProject.instance().addMapLayers([qgslayer])
return qgslayer
def load_layer(self, id, param):
"""
Loads a layer which was specified as parameter.
"""
filepath = self.filepath_from_param(param)
if 'in_place' in param and param['in_place']:
# check if alg modifies layer in place
tmpdir = tempfile.mkdtemp()
self.cleanup_paths.append(tmpdir)
path, file_name = os.path.split(filepath)
base, ext = os.path.splitext(file_name)
for file in glob.glob(os.path.join(path, '{}.*'.format(base))):
shutil.copy(os.path.join(path, file), tmpdir)
filepath = os.path.join(tmpdir, file_name)
self.in_place_layers[id] = filepath
if param['type'] in ('vector', 'table'):
gmlrex = r'\.gml\b'
if re.search(gmlrex, filepath, re.IGNORECASE):
# ewwwww - we have to force SRS detection for GML files, otherwise they'll be loaded
# with no srs
filepath += '|option:FORCE_SRS_DETECTION=YES'
if filepath in self.vector_layer_params:
return self.vector_layer_params[filepath]
options = QgsVectorLayer.LayerOptions()
options.loadDefaultStyle = False
lyr = QgsVectorLayer(filepath, param['name'], 'ogr', options)
self.vector_layer_params[filepath] = lyr
elif param['type'] == 'raster':
options = QgsRasterLayer.LayerOptions()
options.loadDefaultStyle = False
lyr = QgsRasterLayer(filepath, param['name'], 'gdal', options)
self.assertTrue(
lyr.isValid(),
'Could not load layer "{}" from param {}'.format(filepath, param))
QgsProject.instance().addMapLayer(lyr)
return lyr
def createXYZLayer(self, layerType, name):
# create XYZ layer with tms url as uri
provider = "wms"
# isinstance(P, (list, tuple, np.ndarray))
xyzUrls = layerType.xyzUrlConfig()
layerName = name
tilePixelRatio = layerType.tilePixelRatio
coordRefSys = layerType.coordRefSys(self.canvasCrs())
self.setMapCrs(coordRefSys)
if isinstance(xyzUrls, (list)):
# create group layer
root = QgsProject.instance().layerTreeRoot()
layer = root.addGroup(layerType.groupName)
i = 0
for xyzUrl in xyzUrls:
tmsLayerName = layerName
# https://github.com/qgis/QGIS/blob/master/src/providers/wms/qgsxyzconnectiondialog.cpp
uri = "url=" + xyzUrl + "&zmax=18&zmin=0&type=xyz"
if (tilePixelRatio > 0):
uri = uri + "&tilePixelRatio=" + str(tilePixelRatio)
if i > 0:
tmsLayerName = layerName + " Label"
tmsLayer = QgsRasterLayer(uri, tmsLayerName, provider,
QgsRasterLayer.LayerOptions())
tmsLayer.setCustomProperty("ol_layer_type", tmsLayerName)
layer.insertChildNode(0, QgsLayerTreeLayer(tmsLayer))
i = i + 1
if tmsLayer.isValid():
QgsProject.instance().addMapLayer(tmsLayer, False)
self._ol_layers += [tmsLayer]
# last added layer is new reference
self.setReferenceLayer(tmsLayer)
# add to XYT Tiles
self.addToXYZTiles(tmsLayerName, xyzUrl, tilePixelRatio)
else:
uri = "url=" + xyzUrls + "&zmax=18&zmin=0&type=xyz"
if (tilePixelRatio > 0):
uri = uri + "&tilePixelRatio=" + str(tilePixelRatio)
layer = QgsRasterLayer(uri, layerName, provider,
QgsRasterLayer.LayerOptions())
layer.setCustomProperty("ol_layer_type", layerName)
if layer.isValid():
QgsProject.instance().addMapLayer(layer)
self._ol_layers += [layer]
# last added layer is new reference
self.setReferenceLayer(layer)
# add to XYT Tiles
self.addToXYZTiles(layerName, xyzUrls, tilePixelRatio)
# reload connections to update Browser Panel content
self.iface.reloadConnections()
return layer, xyzUrls