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)
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)
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]
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]
