Class: QgsVectorLayerFeatureCounter¶

class qgis.core.QgsVectorLayerFeatureCounter(layer: QgsVectorLayer, context: QgsExpressionContext = QgsExpressionContext())¶

Bases: qgis._core.QgsTask

Create a new feature counter for layer.

Counts the features in a QgsVectorLayer in task. You should most likely not use this directly and instead call QgsVectorLayer.countSymbolFeatures() and connect to the signal QgsVectorLayer.symbolFeatureCountMapChanged()

New in version 3.0: Enums

Methods

`childEvent`
`connectNotify`
`customEvent`
`disconnectNotify`
`featureCount`	Returns the feature count for a particular `legendKey`.
`featureIds`	Returns the feature Ids for a particular `legendKey`.
`finished`
`isCanceled`
`isSignalConnected`
`receivers`
`run`	Calculates the feature count and Ids per symbol
`sender`
`senderSignalIndex`
`setProgress`
`timerEvent`

Signals

symbolsCounted

Emitted when the symbols have been counted.

Attributes

childEvent()¶

connectNotify()¶

customEvent()¶

disconnectNotify()¶

featureCount(self, legendKey: str) → int¶: Returns the feature count for a particular legendKey. If the key has not been found, -1 will be returned.

featureIds(self, symbolkey: str) → object¶: Returns the feature Ids for a particular legendKey. If the key has not been found an empty QSet will be returned.

New in version 3.10.

finished()¶

isCanceled()¶

isSignalConnected()¶

receivers()¶

run(self) → bool¶: Calculates the feature count and Ids per symbol

sender()¶

senderSignalIndex()¶

setProgress()¶

symbolsCounted¶: Emitted when the symbols have been counted. [signal]

timerEvent()¶