本文整理汇总了Python中qgis.core.QgsProcessingUtils.mapLayerFromProject方法的典型用法代码示例。如果您正苦于以下问题：Python QgsProcessingUtils.mapLayerFromProject方法的具体用法？Python QgsProcessingUtils.mapLayerFromProject怎么用？Python QgsProcessingUtils.mapLayerFromProject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.mapLayerFromProject方法的2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: getLayerFromString
# 需要导入模块: from qgis.core import QgsProcessingUtils [as 别名]
# 或者: from qgis.core.QgsProcessingUtils import mapLayerFromProject [as 别名]
def getLayerFromString(string, forceLoad=True):
"""Returns an object (layer/table) given a source definition.
if forceLoad is true, it tries to load it if it is not currently open
Otherwise, it will return the object only if it is loaded in QGIS.
"""
if string is None:
return None
# prefer project layers
layer = QgsProcessingUtils.mapLayerFromProject(string, QgsProject.instance())
if layer:
return layer
if not forceLoad:
return None
return QgsProcessingUtils.mapLayerFromString(string)示例2: value
# 需要导入模块: from qgis.core import QgsProcessingUtils [as 别名]
# 或者: from qgis.core.QgsProcessingUtils import mapLayerFromProject [as 别名]
def value(self):
layers = ''
for i in range(self.layersTree.topLevelItemCount()):
item = self.layersTree.topLevelItem(i)
if item:
layerName = item.text(0)
layer = QgsProcessingUtils.mapLayerFromProject(layerName, QgsProject.instance())
if not layer:
continue
provider = layer.dataProvider()
if not provider:
continue
interpolationAttribute = item.text(1)
if interpolationAttribute == 'Z_COORD':
zCoord = True
fieldIndex = -1
else:
zCoord = False
fieldIndex = layer.fields().indexFromName(interpolationAttribute)
comboBox = self.layersTree.itemWidget(self.layersTree.topLevelItem(i), 2)
inputTypeName = comboBox.currentText()
if inputTypeName == self.tr('Points'):
inputType = QgsInterpolator.POINTS
elif inputTypeName == self.tr('Structure lines'):
inputType = QgsInterpolator.STRUCTURE_LINES
else:
inputType = QgsInterpolator.BREAK_LINES
layers += '{},{},{:d},{:d};'.format(layer.source(),
zCoord,
fieldIndex,
inputType)
return layers[:-1]