Class: QgsRasterFileWriterTask¶
- class qgis.core.QgsRasterFileWriterTask¶
Bases:
QgsTask
QgsTask
task which performs aQgsRasterFileWriter
layer saving operation as a background task. This can be used to save a raster layer out to a file without blocking the QGIS interface.See also
See also
QgsVectorFileExporterTask
QgsRasterFileWriterTask(writer:
QgsRasterFileWriter
, pipe:QgsRasterPipe
, columns: int, rows: int, outputExtent:QgsRectangle
, crs:QgsCoordinateReferenceSystem
) Constructor forQgsRasterFileWriterTask
. Takes a sourcewriter
,columns
,rows
,outputExtent
and destinationcrs
. Ownership of thepipe
is transferred to the writer task, and will be deleted when the task completes.Deprecated since version QGIS: 3.8 use version with transformContext instead
QgsRasterFileWriterTask(writer:
QgsRasterFileWriter
, pipe:QgsRasterPipe
, columns: int, rows: int, outputExtent:QgsRectangle
, crs:QgsCoordinateReferenceSystem
, transformContext:QgsCoordinateTransformContext
) Constructor forQgsRasterFileWriterTask
. Takes a sourcewriter
,columns
,rows
,outputExtent
, destinationcrs
and coordinatetransformContext
. Ownership of thepipe
is transferred to the writer task, and will be deleted when the task completes.Methods
- param result:
Will return
True
if task should terminate ASAP.- rtype:
bool
Sets the task's current progress.
Signals
pyqtSignal(*types, name: str = ..., revision: int = ..., arguments: Sequence = ...) -> PYQT_SIGNAL
pyqtSignal(*types, name: str = ..., revision: int = ..., arguments: Sequence = ...) -> PYQT_SIGNAL
- cancel(self)¶
- childEvent(self, QChildEvent)¶
- connectNotify(self, QMetaMethod)¶
- customEvent(self, QEvent)¶
- disconnectNotify(self, QMetaMethod)¶
- errorOccurred¶
pyqtSignal(*types, name: str = …, revision: int = …, arguments: Sequence = …) -> PYQT_SIGNAL
types is normally a sequence of individual types. Each type is either a type object or a string that is the name of a C++ type. Alternatively each type could itself be a sequence of types each describing a different overloaded signal. name is the optional C++ name of the signal. If it is not specified then the name of the class attribute that is bound to the signal is used. revision is the optional revision of the signal that is exported to QML. If it is not specified then 0 is used. arguments is the optional sequence of the names of the signal’s arguments.
- Parameters:
name (str = ...) –
revision (int = ...) –
arguments (Sequence = ...) –
- Return type:
PYQT_SIGNAL
- finished(self, result: bool)¶
- Parameters:
result (bool) –
- 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 ¶
- run(self) bool ¶
- Return type:
bool
- 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.
- Parameters:
progress – percent of progress, from 0.0 - 100.0
- timerEvent(self, QTimerEvent)¶
- writeComplete¶
pyqtSignal(*types, name: str = …, revision: int = …, arguments: Sequence = …) -> PYQT_SIGNAL
types is normally a sequence of individual types. Each type is either a type object or a string that is the name of a C++ type. Alternatively each type could itself be a sequence of types each describing a different overloaded signal. name is the optional C++ name of the signal. If it is not specified then the name of the class attribute that is bound to the signal is used. revision is the optional revision of the signal that is exported to QML. If it is not specified then 0 is used. arguments is the optional sequence of the names of the signal’s arguments.
- Parameters:
name (str = ...) –
revision (int = ...) –
arguments (Sequence = ...) –
- Return type:
PYQT_SIGNAL