Class: QgsVectorWarperTask

class qgis.analysis.QgsVectorWarperTask

Bases: QgsTask

A task for warping a vector layer in a background thread.

New in version 3.26.

QgsVectorWarperTask(method: QgsGcpTransformerInterface.TransformMethod, points: Iterable[QgsGcpPoint], destinationCrs: QgsCoordinateReferenceSystem, layer: QgsVectorLayer, fileName: str) Constructor for QgsVectorWarperTask.

class Result(value)

Bases: enum.IntEnum

Task results

  • Success: Warping completed successfully

  • Canceled: Task was canceled before completion

  • Error: An error occurred while warping

Canceled = 1
Error = 2
Success = 0
childEvent(self, QChildEvent)
connectNotify(self, QMetaMethod)
customEvent(self, QEvent)
disconnectNotify(self, QMetaMethod)
errorMessage(self) str

Returns the descriptive error message, if an error occurred.

Return type


finished(self, result: bool)

If the task is managed by a QgsTaskManager, this will be called after the task has finished (whether through successful completion or via early termination). The result argument reflects whether the task was successfully completed or not. This method is always called from the main thread, so it is safe to create widgets and perform other operations which require the main thread. However, the GUI will be blocked for the duration of this method so tasks should avoid performing any lengthy operations here.

isCanceled(self) bool

Will return True if task should terminate ASAP. If the task reports the CanCancel flag, then derived classes’ run() methods should periodically check this and terminate in a safe manner.

isSignalConnected(self, QMetaMethod) bool
receivers(self, PYQT_SIGNAL) int
result(self) QgsVectorWarperTask.Result

Returns the result of running the task.

Return type


run(self) bool
Return type


sender(self) QObject
senderSignalIndex(self) int
setProgress(self, progress: float)

Sets the task’s current progress. The derived class should call this method whenever the task wants to update its progress. Calling will automatically emit the progressChanged signal.


progress – percent of progress, from 0.0 - 100.0

timerEvent(self, QTimerEvent)