本文整理汇总了Python中qgis.core.QgsVectorLayer.allFeatureIds方法的典型用法代码示例。如果您正苦于以下问题:Python QgsVectorLayer.allFeatureIds方法的具体用法?Python QgsVectorLayer.allFeatureIds怎么用?Python QgsVectorLayer.allFeatureIds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.QgsVectorLayer
的用法示例。
在下文中一共展示了QgsVectorLayer.allFeatureIds方法的5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: loadLayer
# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import allFeatureIds [as 别名]
def loadLayer(self, view):
uri = u'dbname=\'%s\' host=%s port=%s user=\'%s\' password=\'%s\' key=\'id\' table="%s"."%s" (geom) sql=' % ( self.getData()[0],
self.getData()[1], self.getData()[2], self.getData()[3],
self.getData()[4], self.getData()[5], view )
layer = QgsVectorLayer(uri, view[len(view.split('_')[0])+1:], "postgres")
if (self.data[-1] == 2) and (layer.allFeatureIds() != []):
self.createValueMap(layer, view)
return layer
elif (self.data[-1] == 1):
self.createValueMap(layer, view)
return layer
return False
示例2: createCsvVectorLayer
# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import allFeatureIds [as 别名]
def createCsvVectorLayer(dataSourceHandler, vectorLayerDescriptor, qgsVectorLayer=None):
':type dataSourceHandler:GeoCsvDataSourceHandler'
':type vectorLayerDescriptor: CsvVectorLayerDescriptor'
if not qgsVectorLayer:
# create VectorLayer using memory provider
_path = vectorLayerDescriptor.geometryType
_path += '?index=yes'
if vectorLayerDescriptor.crs:
_path += "&crs=" + vectorLayerDescriptor.crs.toWkt()
qgsVectorLayer = QgsVectorLayer(_path, vectorLayerDescriptor.layerName, "memory")
else:
# reset the memory layer
qgsVectorLayer.dataProvider().deleteFeatures(qgsVectorLayer.allFeatureIds())
qgsVectorLayer.dataProvider().deleteAttributes(qgsVectorLayer.dataProvider().fields().allAttributesList())
# : :type dataProvider: QgsVectorDataProvider
dataProvider = qgsVectorLayer.dataProvider()
dataProvider.addAttributes(vectorLayerDescriptor.getAttributesAsQgsFields())
qgsVectorLayer.updateFields()
dataProvider.addFeatures(dataSourceHandler.createFeaturesFromCsv(vectorLayerDescriptor))
qgsVectorLayer.updateExtents()
csvVectorLayer = CsvVectorLayer(qgsVectorLayer, vectorLayerDescriptor)
csvVectorLayer.updateGeoCsvPath(dataSourceHandler.getPathToCsvFile())
return csvVectorLayer
示例3: SpatialPreview
# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import allFeatureIds [as 别名]
#.........这里部分代码省略.........
self.sel_highlight.setWidth(3)
self.sel_highlight.show()
extent = qgis_geom.boundingBox()
extent.scale(1.5)
map_canvas.setExtent(extent)
map_canvas.refresh()
else:
return
def remove_preview_layer(self, layer, name):
"""
Removes the preview layer from legend.
:param layer: The preview polygon layer to be removed.
:param name: The name of the layer to be removed.
:return: None
"""
if layer is not None:
for lyr in QgsMapLayerRegistry.instance().mapLayers().values():
if lyr.name() == name:
id = lyr.id()
QgsMapLayerRegistry.instance().removeMapLayer(id)
def delete_local_features(self, feature_ids=[]):
"""
Removes features in the local map overlay.
"""
del_status = False
if not self._overlay_layer is None:
if len(feature_ids) == 0:
feature_ids = self._overlay_layer.allFeatureIds()
del_status = self._overlay_layer.dataProvider().deleteFeatures(feature_ids)
return del_status
def remove_layer(self):
"""
Removes both the local and web layers.
"""
if not self._overlay_layer is None:
QgsProject.instance().layerTreeRoot().removeLayer(self._overlay_layer)
#Clear web overlays
self._web_spatial_loader.removeOverlay()
self._overlay_layer = None
def _on_overlay_to_be_removed(self, layers_ids):
"""
Resets the local layer variable and removes the web overlay.
"""
if not self._overlay_layer is None:
if self._overlay_layer.id() in layers_ids:
self.remove_layer()
def on_spatial_browser_error(self, err):
"""
Slot raised when an error occurs when loading items in the property browser
"""
self._insert_notification(err, ERROR)
def on_spatial_browser_loading(self, progress):
示例4: SpatialPreview
# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import allFeatureIds [as 别名]
#.........这里部分代码省略.........
self._iface.mapCanvas().setExtent(extent)
self._iface.mapCanvas().refresh()
self.refresh_canvas_layers()
#Need to force event so that layer is shown
QCoreApplication.sendEvent(self.local_map, QShowEvent())
def _add_geom_to_map(self, geom):
if self._overlay_layer is None:
return
geom_func = geom.ST_AsText()
geom_wkt = self._db_session.scalar(geom_func)
dp = self._overlay_layer.dataProvider()
feat = QgsFeature()
g = QgsGeometry.fromWkt(geom_wkt)
feat.setGeometry(g)
dp.addFeatures([feat])
self._overlay_layer.updateExtents()
return feat, g.boundingBox()
def delete_local_features(self, feature_ids=[]):
"""
Removes features in the local map overlay.
"""
del_status = False
if not self._overlay_layer is None:
if len(feature_ids) == 0:
feature_ids = self._overlay_layer.allFeatureIds()
del_status = self._overlay_layer.dataProvider().deleteFeatures(feature_ids)
return del_status
def remove_layer(self):
"""
Removes both the local and web layers.
"""
if not self._overlay_layer is None:
QgsProject.instance().layerTreeRoot().removeLayer(self._overlay_layer)
#Clear web overlays
self._web_spatial_loader.removeOverlay()
self._overlay_layer = None
def _on_overlay_to_be_removed(self, layers_ids):
"""
Resets the local layer variable and removes the web overlay.
"""
if not self._overlay_layer is None:
if self._overlay_layer.id() in layers_ids:
self.remove_layer()
def on_spatial_browser_error(self, err):
"""
Slot raised when an error occurs when loading items in the property browser
"""
self._insert_notification(err, ERROR)
def on_spatial_browser_loading(self, progress):
示例5: AutoFieldsTests
# 需要导入模块: from qgis.core import QgsVectorLayer [as 别名]
# 或者: from qgis.core.QgsVectorLayer import allFeatureIds [as 别名]
#.........这里部分代码省略.........
expression=u'\'now: \' + to_string("f1")'
)
self.layer.startEditing()
self.layer.changeAttributeValue( 0, self.layer.fieldNameIndex( u'id' ), 1 )
self.layer.commitChanges()
feature = self.layer.getFeatures().next()
self.assertEquals( feature['modified'], 'now: -74.4' )
def test05FieldRemovedThenDisableAutoField( self ):
""" AutoField should be disabled if its base field is removed """
self.msg.show( "Info! Test 5 started", 'info', True )
fieldIndex = self.layer.fieldNameIndex( u'f1' )
self.layer.startEditing()
self.layer.deleteAttribute( fieldIndex )
self.layer.commitChanges()
dictTmpProperties = self.readStoredSettings( self.layer, u'f1' )
self.assertFalse( dictTmpProperties['enabled'] )
def test06MissingFieldAddedThenEnableAutoField( self ):
""" AutoField should be enabled if missing field is added """
self.msg.show( "Info! Test 6 started", 'info', True )
self.layer.startEditing()
self.layer.addAttribute( QgsField( 'f1', QVariant.Double, len=10, prec=2 ) )
self.layer.commitChanges()
dictTmpProperties = self.readStoredSettings( self.layer, u'f1' )
self.assertTrue( dictTmpProperties['enabled'] )
def test07LayerRemovedThenDisableAutoField( self ):
""" AutoField should be disabled if its base layer is removed """
self.msg.show( "Info! Test 7 started", 'info', True )
QgsMapLayerRegistry.instance().removeMapLayer( self.layer.id() )
# removeMapLayer deletes the underlying object, so create it again
self.layer = QgsVectorLayer( self.layerPath, 'puntos', 'ogr' )
dictTmpProperties = self.readStoredSettings( self.layer, u'f1' )
self.assertFalse( dictTmpProperties['enabled'] )
def test08MissingLayerAddedThenEnableAutoField( self ):
""" AutoField should be enabled if missing layer is added """
self.msg.show( "Info! Test 8 started", 'info', True )
# test07 deletes the layer object, so create it again
self.layer = QgsVectorLayer( self.layerPath, 'puntos', 'ogr' )
QgsMapLayerRegistry.instance().addMapLayer( self.layer )
dictTmpProperties = self.readStoredSettings( self.layer, u'f1' )
self.assertTrue( dictTmpProperties['enabled'] )
def test09RemoveAutoField( self ):
""" QSettings should be deleted for the removed AutoField """
self.msg.show( "Info! Test 9 started", 'info', True )
# test07 deletes the layer object, so create it again
self.layer = QgsVectorLayer( self.layerPath, 'puntos', 'ogr' )
autoFieldId = self.autoFieldManager.buildAutoFieldId( self.layer, u'f1')
self.autoFieldManager.removeAutoField( autoFieldId )
dictTmpProperties = self.readStoredSettings( self.layer, u'f1' )
self.assertEqual( dictTmpProperties, {'layer':"",'field':"",'expression':"",'layer2':"",'field2':"",'enabled':False} )
@classmethod
def tearDownClass( self ):
self.msg.show( "Info! TearDown started", 'info', True )
# test07 deletes the layer object, so create it again
self.layer = QgsVectorLayer( self.layerPath, 'puntos', 'ogr' )
#Remove AutoField modified
autoFieldId = self.autoFieldManager.buildAutoFieldId( self.layer, u'modified' )
self.autoFieldManager.removeAutoField( autoFieldId )
#Delete field f1
fieldIndex = self.layer.fieldNameIndex('f1')
self.layer.dataProvider().deleteAttributes( [fieldIndex] )
self.layer.updateFields()
#Delete features from test layer
fIds = self.layer.allFeatureIds()
self.layer.dataProvider().deleteFeatures( fIds )
#Remove layer from Registry
QgsMapLayerRegistry.instance().removeMapLayer( self.layer.id() )
self.msg.show( "Info! TearDown finished", 'info', True )
QgsApplication.exitQgis()