本文整理汇总了Python中qgis.core.QgsProcessingParameterExtent类的典型用法代码示例。如果您正苦于以下问题：Python QgsProcessingParameterExtent类的具体用法？Python QgsProcessingParameterExtent怎么用？Python QgsProcessingParameterExtent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QgsProcessingParameterExtent类的3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: initAlgorithm
def initAlgorithm(self, config=None):
self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT,
self.tr('Input layer')))
self.addParameter(QgsProcessingParameterFeatureSource(self.MASK,
self.tr('Mask layer'),
[QgsProcessing.TypeVectorPolygon]))
self.addParameter(QgsProcessingParameterNumber(self.NODATA,
self.tr('Assign a specified nodata value to output bands'),
type=QgsProcessingParameterNumber.Double,
defaultValue=None,
optional=True))
self.addParameter(QgsProcessingParameterBoolean(self.ALPHA_BAND,
self.tr('Create an output alpha band'),
defaultValue=False))
self.addParameter(QgsProcessingParameterBoolean(self.CROP_TO_CUTLINE,
self.tr('Match the extent of the clipped raster to the extent of the mask layer'),
defaultValue=True))
self.addParameter(QgsProcessingParameterBoolean(self.KEEP_RESOLUTION,
self.tr('Keep resolution of output raster'),
defaultValue=False))
target_extent_param = QgsProcessingParameterExtent(self.TARGET_EXTENT,
self.tr('Georeferenced extents of output file to be created'),
optional=True)
target_extent_param.setFlags(target_extent_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(target_extent_param)
target_extent_crs_param = QgsProcessingParameterCrs(self.TARGET_EXTENT_CRS,
self.tr('CRS of the target raster extent'),
optional=True)
target_extent_crs_param.setFlags(target_extent_crs_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(target_extent_crs_param)
multithreading_param = QgsProcessingParameterBoolean(self.MULTITHREADING,
self.tr('Use multithreaded warping implementation'),
defaultValue=False)
multithreading_param.setFlags(multithreading_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(multithreading_param)
options_param = QgsProcessingParameterString(self.OPTIONS,
self.tr('Additional creation options'),
defaultValue='',
optional=True)
options_param.setFlags(options_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
options_param.setMetadata({
'widget_wrapper': {
'class': 'processing.algs.gdal.ui.RasterOptionsWidget.RasterOptionsWidgetWrapper'}})
self.addParameter(options_param)
dataType_param = QgsProcessingParameterEnum(self.DATA_TYPE,
self.tr('Output data type'),
self.TYPES,
allowMultiple=False,
defaultValue=0)
dataType_param.setFlags(dataType_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(dataType_param)
self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
self.tr('Clipped (mask)')))示例2: initAlgorithm
def initAlgorithm(self, config=None):
self.methods = ((self.tr('Nearest neighbour'), 'near'),
(self.tr('Bilinear'), 'bilinear'),
(self.tr('Cubic'), 'cubic'),
(self.tr('Cubic spline'), 'cubicspline'),
(self.tr('Lanczos windowed sinc'), 'lanczos'),
(self.tr('Average'), 'average'),
(self.tr('Mode'), 'mode'),
(self.tr('Maximum'), 'max'),
(self.tr('Minimum'), 'min'),
(self.tr('Median'), 'med'),
(self.tr('First quartile'), 'q1'),
(self.tr('Third quartile'), 'q3'))
self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT, self.tr('Input layer')))
self.addParameter(QgsProcessingParameterCrs(self.SOURCE_CRS,
self.tr('Source CRS'),
optional=True))
self.addParameter(QgsProcessingParameterCrs(self.TARGET_CRS,
self.tr('Target CRS'),
'EPSG:4326'))
self.addParameter(QgsProcessingParameterNumber(self.NODATA,
self.tr('Nodata value for output bands'),
type=QgsProcessingParameterNumber.Double,
defaultValue=0.0))
self.addParameter(QgsProcessingParameterNumber(self.TARGET_RESOLUTION,
self.tr('Output file resolution in target georeferenced units'),
type=QgsProcessingParameterNumber.Double,
minValue=0.0,
defaultValue=None))
options_param = QgsProcessingParameterString(self.OPTIONS,
self.tr('Additional creation parameters'),
defaultValue='',
optional=True)
options_param.setFlags(options_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
options_param.setMetadata({
'widget_wrapper': {
'class': 'processing.algs.gdal.ui.RasterOptionsWidget.RasterOptionsWidgetWrapper'}})
self.addParameter(options_param)
self.addParameter(QgsProcessingParameterEnum(self.RESAMPLING,
self.tr('Resampling method to use'),
options=[i[0] for i in self.methods],
defaultValue=0))
dataType_param = QgsProcessingParameterEnum(self.DATA_TYPE,
self.tr('Output data type'),
self.TYPES,
allowMultiple=False,
defaultValue=5)
dataType_param.setFlags(dataType_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(dataType_param)
target_extent_param = QgsProcessingParameterExtent(self.TARGET_EXTENT,
self.tr('Georeferenced extents of output file to be created'),
optional=True)
target_extent_param.setFlags(target_extent_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(target_extent_param)
target_extent_crs_param = QgsProcessingParameterCrs(self.TARGET_EXTENT_CRS,
self.tr('CRS of the target raster extent'),
optional=True)
target_extent_crs_param.setFlags(target_extent_crs_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(target_extent_crs_param)
multithreading_param = QgsProcessingParameterBoolean(self.MULTITHREADING,
self.tr('Use multithreaded warping implementation'),
defaultValue=False)
multithreading_param.setFlags(multithreading_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.addParameter(multithreading_param)
self.addParameter(QgsProcessingParameterRasterDestination(self.OUTPUT,
self.tr('Reprojected')))示例3: defineCharacteristicsFromFile
def defineCharacteristicsFromFile(self):
"""
Create algorithm parameters and outputs from a text file.
"""
with open(self.descriptionFile) as lines:
# First line of the file is the Grass algorithm name
line = lines.readline().strip('\n').strip()
self.grass7Name = line
# Second line if the algorithm name in Processing
line = lines.readline().strip('\n').strip()
self._short_description = line
if " - " not in line:
self._name = self.grass7Name
else:
self._name = line[:line.find(' ')].lower()
self._display_name = self._name
# Read the grass group
line = lines.readline().strip('\n').strip()
self._group = QCoreApplication.translate("GrassAlgorithm", line)
self._groupId = self.groupIdRegex.search(line).group(0).lower()
hasRasterOutput = False
hasRasterInput = False
hasVectorInput = False
vectorOutputs = False
# Then you have parameters/output definition
line = lines.readline().strip('\n').strip()
while line != '':
try:
line = line.strip('\n').strip()
if line.startswith('Hardcoded'):
self.hardcodedStrings.append(line[len('Hardcoded|'):])
parameter = getParameterFromString(line)
if parameter is not None:
self.params.append(parameter)
if isinstance(parameter, (QgsProcessingParameterVectorLayer, QgsProcessingParameterFeatureSource)):
hasVectorInput = True
elif isinstance(parameter, QgsProcessingParameterRasterLayer):
hasRasterInput = True
elif isinstance(parameter, QgsProcessingParameterMultipleLayers):
if parameter.layerType() < 3 or parameter.layerType() == 5:
hasVectorInput = True
elif parameter.layerType() == 3:
hasRasterInput = True
elif isinstance(parameter, QgsProcessingParameterVectorDestination):
vectorOutputs = True
elif isinstance(parameter, QgsProcessingParameterRasterDestination):
hasRasterOutput = True
line = lines.readline().strip('\n').strip()
except Exception as e:
QgsMessageLog.logMessage(self.tr('Could not open GRASS GIS 7 algorithm: {0}\n{1}').format(self.descriptionFile, line), self.tr('Processing'), Qgis.Critical)
raise e
param = QgsProcessingParameterExtent(
self.GRASS_REGION_EXTENT_PARAMETER,
self.tr('GRASS GIS 7 region extent'),
optional=True
)
param.setFlags(param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.params.append(param)
if hasRasterOutput or hasRasterInput:
# Add a cellsize parameter
param = QgsProcessingParameterNumber(
self.GRASS_REGION_CELLSIZE_PARAMETER,
self.tr('GRASS GIS 7 region cellsize (leave 0 for default)'),
type=QgsProcessingParameterNumber.Double,
minValue=0.0, maxValue=sys.float_info.max + 1, defaultValue=0.0
)
param.setFlags(param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.params.append(param)
if hasRasterOutput:
# Add a createopt parameter for format export
param = QgsProcessingParameterString(
self.GRASS_RASTER_FORMAT_OPT,
self.tr('Output Rasters format options (createopt)'),
multiLine=True, optional=True
)
param.setFlags(param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.params.append(param)
# Add a metadata parameter for format export
param = QgsProcessingParameterString(
self.GRASS_RASTER_FORMAT_META,
self.tr('Output Rasters format metadata options (metaopt)'),
multiLine=True, optional=True
)
param.setFlags(param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.params.append(param)
if hasVectorInput:
param = QgsProcessingParameterNumber(self.GRASS_SNAP_TOLERANCE_PARAMETER,
self.tr('v.in.ogr snap tolerance (-1 = no snap)'),
type=QgsProcessingParameterNumber.Double,
minValue=-1.0, maxValue=sys.float_info.max + 1,
defaultValue=-1.0)
param.setFlags(param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
self.params.append(param)
param = QgsProcessingParameterNumber(self.GRASS_MIN_AREA_PARAMETER,
self.tr('v.in.ogr min area'),
#.........这里部分代码省略.........