本文整理汇总了Python中qgis.core.QgsProcessingParameters类的典型用法代码示例。如果您正苦于以下问题：Python QgsProcessingParameters类的具体用法？Python QgsProcessingParameters怎么用？Python QgsProcessingParameters使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了QgsProcessingParameters类的6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，您的评价将有助于我们的系统推荐出更棒的Python代码示例。
示例1: getParameterFromString
def getParameterFromString(s):
# Try the parameter definitions used in description files
if '|' in s and (s.startswith("Parameter") or s.startswith("*Parameter")):
isAdvanced = False
if s.startswith("*"):
s = s[1:]
isAdvanced = True
tokens = s.split("|")
params = [t if str(t) != str(None) else None for t in tokens[1:]]
try:
clazz = getattr(sys.modules[__name__], tokens[0])
param = clazz(*params)
if isAdvanced:
param.setFlags(param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
return param
except:
return None
else: # try script syntax
# try native method
param = QgsProcessingParameters.parameterFromScriptCode(s)
if param:
return param
# try Python duck-typed method
for paramClass in paramClasses:
try:
param = paramClass.fromScriptCode(s)
if param is not None:
return param
except:
pass
开发者ID:ndavid，项目名称:QGIS，代码行数:32，代码来源:parameters.py
示例2: __init__
def __init__(self, dialog, param):
super(ExtentSelectionPanel, self).__init__(None)
self.setupUi(self)
self.leText.textChanged.connect(lambda: self.hasChanged.emit())
self.dialog = dialog
self.param = param
self.crs = QgsProject.instance().crs()
if self.param.flags() & QgsProcessingParameterDefinition.FlagOptional:
if hasattr(self.leText, 'setPlaceholderText'):
self.leText.setPlaceholderText(
self.tr('[Leave blank to use min covering extent]'))
self.btnSelect.clicked.connect(self.selectExtent)
if iface is not None:
canvas = iface.mapCanvas()
self.prevMapTool = canvas.mapTool()
self.tool = RectangleMapTool(canvas)
self.tool.rectangleCreated.connect(self.updateExtent)
else:
self.prevMapTool = None
self.tool = None
if param.defaultValue() is not None:
context = createContext()
rect = QgsProcessingParameters.parameterAsExtent(param, {param.name(): param.defaultValue()}, context)
crs = QgsProcessingParameters.parameterAsExtentCrs(param, {param.name(): param.defaultValue()}, context)
if not rect.isNull():
try:
s = '{},{},{},{}'.format(
rect.xMinimum(), rect.xMaximum(), rect.yMinimum(), rect.yMaximum())
if crs.isValid():
s += ' [' + crs.authid() + ']'
self.crs = crs
self.leText.setText(s)
except:
pass
开发者ID:marcel-dancak，项目名称:QGIS，代码行数:40，代码来源:ExtentSelectionPanel.py
示例3: executeIterating
def executeIterating(alg, parameters, paramToIter, context, feedback):
# Generate all single-feature layers
parameter_definition = alg.parameterDefinition(paramToIter)
if not parameter_definition:
return False
iter_source = QgsProcessingParameters.parameterAsSource(parameter_definition, parameters, context)
sink_list = []
if iter_source.featureCount() == 0:
return False
total = 100.0 / iter_source.featureCount()
for current, feat in enumerate(iter_source.getFeatures()):
if feedback.isCanceled():
return False
sink, sink_id = QgsProcessingUtils.createFeatureSink('memory:', context, iter_source.fields(), iter_source.wkbType(), iter_source.sourceCrs())
sink_list.append(sink_id)
sink.addFeature(feat, QgsFeatureSink.FastInsert)
del sink
feedback.setProgress(int(current * total))
# store output values to use them later as basenames for all outputs
outputs = {}
for out in alg.destinationParameterDefinitions():
if out.name() in parameters:
outputs[out.name()] = parameters[out.name()]
# now run all the algorithms
for i, f in enumerate(sink_list):
if feedback.isCanceled():
return False
parameters[paramToIter] = f
for out in alg.destinationParameterDefinitions():
if out.name() not in outputs:
continue
o = outputs[out.name()]
parameters[out.name()] = QgsProcessingUtils.generateIteratingDestination(o, i, context)
feedback.setProgressText(QCoreApplication.translate('AlgorithmExecutor', 'Executing iteration {0}/{1}…').format(i + 1, len(sink_list)))
feedback.setProgress(i * 100 / len(sink_list))
ret, results = execute(alg, parameters, context, feedback)
if not ret:
return False
handleAlgorithmResults(alg, context, feedback, False)
return True
开发者ID:rldhont，项目名称:Quantum-GIS，代码行数:49，代码来源:AlgorithmExecutor.py
示例4: fromScriptCode
def fromScriptCode(self, line):
isOptional, name, definition = _splitParameterOptions(line)
descName = QgsProcessingParameters.descriptionFromName(name)
if definition.lower().strip().startswith('selectionfromfile'):
options = definition.strip()[len('selectionfromfile '):].split(';')
return ParameterSelection(name, descName, options, isSource=True, optional=isOptional)
elif definition.lower().strip().startswith('selection'):
options = definition.strip()[len('selection '):].split(';')
return ParameterSelection(name, descName, options, optional=isOptional)
elif definition.lower().strip().startswith('multipleselectionfromfile'):
options = definition.strip()[len('multipleselectionfromfile '):].split(';')
return ParameterSelection(name, descName, options, isSource=True,
multiple=True, optional=isOptional)
elif definition.lower().strip().startswith('multipleselection'):
options = definition.strip()[len('multipleselection '):].split(';')
return ParameterSelection(name, descName, options, multiple=True, optional=isOptional)
开发者ID:ndavid，项目名称:QGIS，代码行数:16，代码来源:parameters.py
示例5: getParameterFromString
#.........这里部分代码省略.........
params[5] = True if params[5].lower() == 'true' else False
elif clazz == QgsProcessingParameterFeatureSource:
if len(params) > 2:
try:
params[2] = [int(p) for p in params[2].split(';')]
except:
params[2] = [getattr(QgsProcessing, p.split(".")[1]) for p in params[2].split(';')]
if len(params) > 4:
params[4] = True if params[4].lower() == 'true' else False
elif clazz == QgsProcessingParameterMultipleLayers:
if len(params) > 2:
try:
params[2] = int(params[2])
except:
params[2] = getattr(QgsProcessing, params[2].split(".")[1])
if len(params) > 4:
params[4] = True if params[4].lower() == 'true' else False
elif clazz == QgsProcessingParameterMatrix:
if len(params) > 2:
params[2] = int(params[2])
if len(params) > 3:
params[3] = True if params[3].lower() == 'true' else False
if len(params) > 4:
params[4] = params[4].split(';')
if len(params) > 6:
params[6] = True if params[6].lower() == 'true' else False
elif clazz == QgsProcessingParameterField:
if len(params) > 4:
try:
params[4] = int(params[4])
except:
params[4] = getattr(QgsProcessingParameterField, params[4].split(".")[1])
if len(params) > 5:
params[5] = True if params[5].lower() == 'true' else False
if len(params) > 6:
params[6] = True if params[6].lower() == 'true' else False
elif clazz == QgsProcessingParameterFile:
if len(params) > 2:
try:
params[2] = int(params[2])
except:
params[2] = getattr(QgsProcessingParameterFile, params[2].split(".")[1])
if len(params) > 5:
params[5] = True if params[5].lower() == 'true' else False
elif clazz == QgsProcessingParameterNumber:
if len(params) > 2:
try:
params[2] = int(params[2])
except:
params[2] = getattr(QgsProcessingParameterNumber, params[2].split(".")[1])
if len(params) > 3:
params[3] = float(params[3].strip()) if params[3] is not None else None
if len(params) > 4:
params[4] = True if params[4].lower() == 'true' else False
if len(params) > 5:
params[5] = float(params[5].strip()) if params[5] is not None else -sys.float_info.max + 1
if len(params) > 6:
params[6] = float(params[6].strip()) if params[6] is not None else sys.float_info.max - 1
elif clazz == QgsProcessingParameterString:
if len(params) > 3:
params[3] = True if params[3].lower() == 'true' else False
if len(params) > 4:
params[4] = True if params[4].lower() == 'true' else False
elif clazz == QgsProcessingParameterFileDestination:
if len(params) > 4:
params[4] = True if params[4].lower() == 'true' else False
if len(params) > 5:
params[5] = True if params[5].lower() == 'true' else False
elif clazz == QgsProcessingParameterFolderDestination:
if len(params) > 3:
params[3] = True if params[3].lower() == 'true' else False
elif clazz == QgsProcessingParameterRasterDestination:
if len(params) > 3:
params[3] = True if params[3].lower() == 'true' else False
if len(params) > 4:
params[4] = True if params[4].lower() == 'true' else False
elif clazz == QgsProcessingParameterVectorDestination:
if len(params) > 2:
try:
params[2] = int(params[2])
except:
params[2] = getattr(QgsProcessing, params[2].split(".")[1])
if len(params) > 4:
params[4] = True if params[4].lower() == 'true' else False
if len(params) > 5:
params[5] = True if params[5].lower() == 'true' else False
param = clazz(*params)
if isAdvanced:
param.setFlags(param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
return param
else:
return None
else: # try script syntax
# try native method
param = QgsProcessingParameters.parameterFromScriptCode(s)
if param:
return param
开发者ID:ufolr，项目名称:QGIS，代码行数:101，代码来源:parameters.py
示例6: prepareAlgorithm
def prepareAlgorithm(self, parameters, context, feedback):
self.m_value = self.parameterAsDouble(parameters, self.M_VALUE, context)
self.dynamic_m = QgsProcessingParameters.isDynamic(parameters, self.M_VALUE)
if self.dynamic_m:
self.m_property = parameters[self.M_VALUE]
return True
开发者ID:minorua，项目名称:QGIS，代码行数:6，代码来源:SetMValue.py
注：本文中的qgis.core.QgsProcessingParameters类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。 |
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