本文整理汇总了Python中qgis.core.QgsProcessingUtils.variantToSource方法的典型用法代码示例。如果您正苦于以下问题：Python QgsProcessingUtils.variantToSource方法的具体用法？Python QgsProcessingUtils.variantToSource怎么用？Python QgsProcessingUtils.variantToSource使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.core.QgsProcessingUtils的用法示例。
在下文中一共展示了QgsProcessingUtils.variantToSource方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: processAlgorithm
# 需要导入模块: from qgis.core import QgsProcessingUtils [as 别名]
# 或者: from qgis.core.QgsProcessingUtils import variantToSource [as 别名]
def processAlgorithm(self, parameters, context, feedback):
interpolationData = ParameterInterpolationData.parseValue(parameters[self.INTERPOLATION_DATA])
method = self.parameterAsEnum(parameters, self.METHOD, context)
columns = self.parameterAsInt(parameters, self.COLUMNS, context)
rows = self.parameterAsInt(parameters, self.ROWS, context)
bbox = self.parameterAsExtent(parameters, self.EXTENT, context)
output = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
if interpolationData is None:
raise QgsProcessingException(
self.tr('You need to specify at least one input layer.'))
layerData = []
layers = []
crs = QgsCoordinateReferenceSystem()
for row in interpolationData.split(';'):
v = row.split(',')
data = QgsInterpolator.LayerData()
# need to keep a reference until interpolation is complete
layer = QgsProcessingUtils.variantToSource(v[0], context)
data.source = layer
layers.append(layer)
if not crs.isValid():
crs = layer.sourceCrs()
data.valueSource = int(v[1])
data.interpolationAttribute = int(v[2])
if v[3] == '0':
data.sourceType = QgsInterpolator.SourcePoints
elif v[3] == '1':
data.sourceType = QgsInterpolator.SourceStructureLines
else:
data.sourceType = QgsInterpolator.SourceBreakLines
layerData.append(data)
if method == 0:
interpolationMethod = QgsTinInterpolator.Linear
else:
interpolationMethod = QgsTinInterpolator.CloughTocher
(triangulation_sink, triangulation_dest_id) = self.parameterAsSink(parameters, self.TRIANGULATION, context,
QgsTinInterpolator.triangulationFields(), QgsWkbTypes.LineString, crs)
interpolator = QgsTinInterpolator(layerData, interpolationMethod, feedback)
if triangulation_sink is not None:
interpolator.setTriangulationSink(triangulation_sink)
writer = QgsGridFileWriter(interpolator,
output,
bbox,
columns,
rows)
writer.writeFile(feedback)
return {self.OUTPUT: output, self.TRIANGULATION: triangulation_dest_id}示例2: processAlgorithm
# 需要导入模块: from qgis.core import QgsProcessingUtils [as 别名]
# 或者: from qgis.core.QgsProcessingUtils import variantToSource [as 别名]
def processAlgorithm(self, parameters, context, feedback):
interpolationData = ParameterInterpolationData.parseValue(parameters[self.INTERPOLATION_DATA])
coefficient = self.parameterAsDouble(parameters, self.DISTANCE_COEFFICIENT, context)
bbox = self.parameterAsExtent(parameters, self.EXTENT, context)
pixel_size = self.parameterAsDouble(parameters, self.PIXEL_SIZE, context)
output = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
columns = self.parameterAsInt(parameters, self.COLUMNS, context)
rows = self.parameterAsInt(parameters, self.ROWS, context)
if columns == 0:
columns = max(round(bbox.width() / pixel_size) + 1, 1)
if rows == 0:
rows = max(round(bbox.height() / pixel_size) + 1, 1)
if interpolationData is None:
raise QgsProcessingException(
self.tr('You need to specify at least one input layer.'))
layerData = []
layers = []
for row in interpolationData.split('::|::'):
v = row.split('::~::')
data = QgsInterpolator.LayerData()
# need to keep a reference until interpolation is complete
layer = QgsProcessingUtils.variantToSource(v[0], context)
data.source = layer
layers.append(layer)
data.valueSource = int(v[1])
data.interpolationAttribute = int(v[2])
if v[3] == '0':
data.sourceType = QgsInterpolator.SourcePoints
elif v[3] == '1':
data.sourceType = QgsInterpolator.SourceStructureLines
else:
data.sourceType = QgsInterpolator.SourceBreakLines
layerData.append(data)
interpolator = QgsIDWInterpolator(layerData)
interpolator.setDistanceCoefficient(coefficient)
writer = QgsGridFileWriter(interpolator,
output,
bbox,
columns,
rows)
writer.writeFile(feedback)
return {self.OUTPUT: output}示例3: setLayers
# 需要导入模块: from qgis.core import QgsProcessingUtils [as 别名]
# 或者: from qgis.core.QgsProcessingUtils import variantToSource [as 别名]
def setLayers(self, layersData):
self.extent = QgsRectangle()
self.layers = []
for row in layersData.split(';'):
v = row.split('::~::')
# need to keep a reference until interpolation is complete
layer = QgsProcessingUtils.variantToSource(v[0], self.context)
if layer:
self.layers.append(layer)
bbox = layer.sourceExtent()
if self.extent.isEmpty():
self.extent = bbox
else:
self.extent.combineExtentWith(bbox)
self.pixelSizeChanged()示例4: setSource
# 需要导入模块: from qgis.core import QgsProcessingUtils [as 别名]
# 或者: from qgis.core.QgsProcessingUtils import variantToSource [as 别名]
def setSource(self, source):
source = QgsProcessingUtils.variantToSource(source, self.context)
self.widget.setSource(source)