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"""
***************************************************************************
dataobject.py
---------------------
Date : August 2012
Copyright : (C) 2012 by Victor Olaya
Email : volayaf at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = "Victor Olaya"
__date__ = "August 2012"
__copyright__ = "(C) 2012, Victor Olaya"
import os
import re
from qgis.core import (
QgsDataProvider,
QgsRasterLayer,
QgsWkbTypes,
QgsVectorLayer,
QgsProject,
QgsSettings,
QgsProcessingContext,
QgsProcessingUtils,
QgsFeatureRequest,
QgsExpressionContext,
QgsExpressionContextUtils,
QgsExpressionContextScope,
)
from qgis.gui import QgsSublayersDialog
from qgis.PyQt.QtCore import QCoreApplication
from qgis.utils import iface
from processing.core.ProcessingConfig import ProcessingConfig
ALL_TYPES = [-1]
TYPE_VECTOR_ANY = -1
TYPE_VECTOR_POINT = 0
TYPE_VECTOR_LINE = 1
TYPE_VECTOR_POLYGON = 2
TYPE_RASTER = 3
TYPE_FILE = 4
TYPE_TABLE = 5
# changing this signature? make sure you update the signature in
# python/processing/__init__.py too!
# Docstring for this function is in python/processing/__init__.py
def createContext(feedback=None):
context = QgsProcessingContext()
context.setProject(QgsProject.instance())
context.setFeedback(feedback)
invalid_features_method = ProcessingConfig.getSetting(
ProcessingConfig.FILTER_INVALID_GEOMETRIES
)
if invalid_features_method is None:
invalid_features_method = (
QgsFeatureRequest.InvalidGeometryCheck.GeometryAbortOnInvalid
)
else:
invalid_features_method = QgsFeatureRequest.InvalidGeometryCheck(
int(invalid_features_method)
)
context.setInvalidGeometryCheck(invalid_features_method)
settings = QgsSettings()
context.setDefaultEncoding(
QgsProcessingUtils.resolveDefaultEncoding(
settings.value("/Processing/encoding")
)
)
context.setExpressionContext(createExpressionContext())
if iface and iface.mapCanvas() and iface.mapCanvas().mapSettings().isTemporal():
context.setCurrentTimeRange(iface.mapCanvas().mapSettings().temporalRange())
return context
def createExpressionContext():
context = QgsExpressionContext()
context.appendScope(QgsExpressionContextUtils.globalScope())
context.appendScope(QgsExpressionContextUtils.projectScope(QgsProject.instance()))
if iface and iface.mapCanvas():
context.appendScope(
QgsExpressionContextUtils.mapSettingsScope(iface.mapCanvas().mapSettings())
)
processingScope = QgsExpressionContextScope()
if iface and iface.mapCanvas():
extent = iface.mapCanvas().fullExtent()
processingScope.setVariable("fullextent_minx", extent.xMinimum())
processingScope.setVariable("fullextent_miny", extent.yMinimum())
processingScope.setVariable("fullextent_maxx", extent.xMaximum())
processingScope.setVariable("fullextent_maxy", extent.yMaximum())
context.appendScope(processingScope)
return context
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.GeometryType.PointGeometry:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_POINT_STYLE
)
elif qgslayer.geometryType() == QgsWkbTypes.GeometryType.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 getRasterSublayer(path, param):
layer = QgsRasterLayer(path)
try:
# If the layer is a raster layer and has multiple sublayers, let the user chose one.
# Based on QgisApp::askUserForGDALSublayers
if (
layer
and param.showSublayersDialog
and layer.dataProvider().name() == "gdal"
and len(layer.subLayers()) > 1
):
layers = []
subLayerNum = 0
# simplify raster sublayer name
for subLayer in layer.subLayers():
# if netcdf/hdf use all text after filename
if bool(re.match("netcdf", subLayer, re.I)) or bool(
re.match("hdf", subLayer, re.I)
):
subLayer = subLayer.split(path)[1]
subLayer = subLayer[1:]
else:
# remove driver name and file name
subLayer.replace(
subLayer.split(QgsDataProvider.SUBLAYER_SEPARATOR)[0], ""
)
subLayer.replace(path, "")
# remove any : or " left over
if subLayer.startswith(":"):
subLayer = subLayer[1:]
if subLayer.startswith('"'):
subLayer = subLayer[1:]
if subLayer.endswith(":"):
subLayer = subLayer[:-1]
if subLayer.endswith('"'):
subLayer = subLayer[:-1]
ld = QgsSublayersDialog.LayerDefinition()
ld.layerId = subLayerNum
ld.layerName = subLayer
layers.append(ld)
subLayerNum = subLayerNum + 1
# Use QgsSublayersDialog
# Would be good if QgsSublayersDialog had an option to allow only one sublayer to be selected
chooseSublayersDialog = QgsSublayersDialog(
QgsSublayersDialog.ProviderType.Gdal, "gdal"
)
chooseSublayersDialog.populateLayerTable(layers)
if chooseSublayersDialog.exec():
return layer.subLayers()[chooseSublayersDialog.selectionIndexes()[0]]
else:
# If user pressed cancel then just return the input path
return path
else:
# If the sublayers selection dialog is not to be shown then just return the input path
return path
except:
# If the layer is not a raster layer, then just return the input path
return path
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