Interface for mesh datasets and dataset groups. More...

#include <qgsmeshdataprovider.h>

Inheritance diagram for QgsMeshDatasetSourceInterface:

[legend]

Public Member Functions
	QgsMeshDatasetSourceInterface ()

virtual	~QgsMeshDatasetSourceInterface ()=default

virtual bool	addDataset (const QString &uri)=0
	Associate dataset with the mesh.

virtual QgsMeshDataBlock	areFacesActive (QgsMeshDatasetIndex index, int faceIndex, int count) const =0
	Returns whether the faces are active for particular dataset.

virtual QgsMesh3DDataBlock	dataset3dValues (QgsMeshDatasetIndex index, int faceIndex, int count) const =0
	Returns N vector/scalar values from the face index from the dataset for 3d stacked meshes.

virtual int	datasetCount (int groupIndex) const =0
	Returns number of datasets loaded in the group.

int	datasetCount (QgsMeshDatasetIndex index) const
	Returns number of datasets loaded in the group.

virtual int	datasetGroupCount () const =0
	Returns number of datasets groups loaded.

virtual QgsMeshDatasetGroupMetadata	datasetGroupMetadata (int groupIndex) const =0
	Returns dataset group metadata.

QgsMeshDatasetGroupMetadata	datasetGroupMetadata (QgsMeshDatasetIndex index) const
	Returns dataset group metadata.

QgsMeshDatasetIndex	datasetIndexAtTime (const QDateTime &referenceTime, int groupIndex, qint64 time, QgsMeshDataProviderTemporalCapabilities::MatchingTemporalDatasetMethod method) const
	Returns the dataset index of the dataset in a specific dataset group at time from the reference time.

QList< QgsMeshDatasetIndex >	datasetIndexInTimeInterval (const QDateTime &referenceTime, int groupIndex, qint64 time1, qint64 time2) const
	Returns a list of dataset indexes of the dataset in a specific dataset group that are between time1 and time2 from the reference time.

virtual QgsMeshDatasetMetadata	datasetMetadata (QgsMeshDatasetIndex index) const =0
	Returns dataset metadata.

virtual QgsMeshDatasetValue	datasetValue (QgsMeshDatasetIndex index, int valueIndex) const =0
	Returns vector/scalar value associated with the index from the dataset To read multiple continuous values, use datasetValues()

virtual QgsMeshDataBlock	datasetValues (QgsMeshDatasetIndex index, int valueIndex, int count) const =0
	Returns N vector/scalar values from the index from the dataset.

virtual QStringList	extraDatasets () const =0
	Returns list of additional dataset file URIs added using addDataset() calls.

virtual bool	isFaceActive (QgsMeshDatasetIndex index, int faceIndex) const =0
	Returns whether the face is active for particular dataset.

virtual bool	persistDatasetGroup (const QString &outputFilePath, const QString &outputDriver, const QgsMeshDatasetGroupMetadata &meta, const QVector< QgsMeshDataBlock > &datasetValues, const QVector< QgsMeshDataBlock > &datasetActive, const QVector< double > &times)=0
	Creates a new dataset group from a data and persists it into a destination path.

virtual bool	persistDatasetGroup (const QString &outputFilePath, const QString &outputDriver, QgsMeshDatasetSourceInterface *source, int datasetGroupIndex)=0
	Saves a an existing dataset group provided by source to a file with a specified driver.

virtual Q_DECL_DEPRECATED bool	persistDatasetGroup (const QString &path, const QgsMeshDatasetGroupMetadata &meta, const QVector< QgsMeshDataBlock > &datasetValues, const QVector< QgsMeshDataBlock > &datasetActive, const QVector< double > &times)
	Creates a new dataset group from a data and persists it into a destination path.

Protected Attributes
std::unique_ptr< QgsMeshDataProviderTemporalCapabilities >	mTemporalCapabilities

Detailed Description

Interface for mesh datasets and dataset groups.

Dataset is a collection of vector or scalar values on vertices or faces of the mesh. Based on the underlying data provider/format, whole dataset is either stored in memory or read on demand

Datasets are grouped in the dataset groups. A dataset group represents a measured quantity (e.g. depth or wind speed), dataset represents values of the quantity in a particular time.

Note: The API is considered EXPERIMENTAL and can be changed without a notice

Since: QGIS 3.2

Definition at line 214 of file qgsmeshdataprovider.h.

Constructor & Destructor Documentation

◆ QgsMeshDatasetSourceInterface()

QgsMeshDatasetSourceInterface::QgsMeshDatasetSourceInterface ( )

Definition at line 115 of file qgsmeshdataprovider.cpp.

◆ ~QgsMeshDatasetSourceInterface()

virtual QgsMeshDatasetSourceInterface::~QgsMeshDatasetSourceInterface ( )

virtualdefault

Member Function Documentation

◆ addDataset()

virtual bool QgsMeshDatasetSourceInterface::addDataset ( const QString & uri )

pure virtual

Associate dataset with the mesh.

emits dataChanged when successful

Implemented in QgsMeshExtraDatasetStore.

◆ areFacesActive()

virtual QgsMeshDataBlock QgsMeshDatasetSourceInterface::areFacesActive	(	QgsMeshDatasetIndex	index,
		int	faceIndex,
		int	count
	)		const

pure virtual

Returns whether the faces are active for particular dataset.

Since: QGIS 3.6

Implemented in QgsMeshExtraDatasetStore.

◆ dataset3dValues()

virtual QgsMesh3DDataBlock QgsMeshDatasetSourceInterface::dataset3dValues	(	QgsMeshDatasetIndex	index,
		int	faceIndex,
		int	count
	)		const

pure virtual

Returns N vector/scalar values from the face index from the dataset for 3d stacked meshes.

See QgsMeshDatasetMetadata::isVector() to check if the returned value is vector or scalar

returns invalid block for DataOnFaces and DataOnVertices.

See also: datasetValues

Since: QGIS 3.12

Implemented in QgsMeshExtraDatasetStore.

◆ datasetCount() [1/2]

virtual int QgsMeshDatasetSourceInterface::datasetCount ( int groupIndex ) const

pure virtual

Returns number of datasets loaded in the group.

Implemented in QgsMeshExtraDatasetStore.

◆ datasetCount() [2/2]

int QgsMeshDatasetSourceInterface::datasetCount ( QgsMeshDatasetIndex index ) const

Returns number of datasets loaded in the group.

Definition at line 118 of file qgsmeshdataprovider.cpp.

◆ datasetGroupCount()

virtual int QgsMeshDatasetSourceInterface::datasetGroupCount ( ) const

pure virtual

Returns number of datasets groups loaded.

Implemented in QgsMeshExtraDatasetStore.

◆ datasetGroupMetadata() [1/2]

virtual QgsMeshDatasetGroupMetadata QgsMeshDatasetSourceInterface::datasetGroupMetadata ( int groupIndex ) const

pure virtual

Returns dataset group metadata.

Implemented in QgsMeshExtraDatasetStore.

◆ datasetGroupMetadata() [2/2]

QgsMeshDatasetGroupMetadata QgsMeshDatasetSourceInterface::datasetGroupMetadata ( QgsMeshDatasetIndex index ) const

Returns dataset group metadata.

Definition at line 123 of file qgsmeshdataprovider.cpp.

◆ datasetIndexAtTime()

QgsMeshDatasetIndex QgsMeshDatasetSourceInterface::datasetIndexAtTime	(	const QDateTime &	referenceTime,
		int	groupIndex,
		qint64	time,
		QgsMeshDataProviderTemporalCapabilities::MatchingTemporalDatasetMethod	method
	)		const

Returns the dataset index of the dataset in a specific dataset group at time from the reference time.

Parameters

referenceTime	the reference time from where to find the dataset
groupIndex	the index of the dataset group
time	the relative time from reference time
method	the method used to check the time

Returns: the dataset index

Definition at line 60 of file qgsmeshdataprovider.cpp.

◆ datasetIndexInTimeInterval()

QList< QgsMeshDatasetIndex > QgsMeshDatasetSourceInterface::datasetIndexInTimeInterval	(	const QDateTime &	referenceTime,
		int	groupIndex,
		qint64	time1,
		qint64	time2
	)		const

Returns a list of dataset indexes of the dataset in a specific dataset group that are between time1 and time2 from the reference time.

Parameters

referenceTime	the reference time from where to find the dataset
groupIndex	the index of the dataset group
time1	the first relative time of the time intervale from reference time
time2	the second relative time of the time intervale from reference time

Returns: the dataset index

Since: QGIS 3.22

Definition at line 86 of file qgsmeshdataprovider.cpp.

◆ datasetMetadata()

virtual QgsMeshDatasetMetadata QgsMeshDatasetSourceInterface::datasetMetadata ( QgsMeshDatasetIndex index ) const

pure virtual

Returns dataset metadata.

Implemented in QgsMeshExtraDatasetStore.

◆ datasetValue()

virtual QgsMeshDatasetValue QgsMeshDatasetSourceInterface::datasetValue	(	QgsMeshDatasetIndex	index,
		int	valueIndex
	)		const

pure virtual

Returns vector/scalar value associated with the index from the dataset To read multiple continuous values, use datasetValues()

See QgsMeshDatasetMetadata::isVector() or QgsMeshDataBlock::type() to check if the returned value is vector or scalar

Returns invalid value for DataOnVolumes

See also: datasetValues

Implemented in QgsMeshExtraDatasetStore.

◆ datasetValues()

virtual QgsMeshDataBlock QgsMeshDatasetSourceInterface::datasetValues	(	QgsMeshDatasetIndex	index,
		int	valueIndex,
		int	count
	)		const

pure virtual

Returns N vector/scalar values from the index from the dataset.

See QgsMeshDatasetMetadata::isVector() or QgsMeshDataBlock::type() to check if the returned value is vector or scalar

Returns invalid block for DataOnVolumes. Use QgsMeshLayerUtils::datasetValues() if you need block for any type of data type

Since: QGIS 3.6

Implemented in QgsMeshExtraDatasetStore.

◆ extraDatasets()

virtual QStringList QgsMeshDatasetSourceInterface::extraDatasets ( ) const

pure virtual

Returns list of additional dataset file URIs added using addDataset() calls.

Implemented in QgsMeshExtraDatasetStore.

◆ isFaceActive()

virtual bool QgsMeshDatasetSourceInterface::isFaceActive	(	QgsMeshDatasetIndex	index,
		int	faceIndex
	)		const

pure virtual

Returns whether the face is active for particular dataset.

For example to represent the situation when F1 and F3 are flooded, but F2 is dry, some solvers store water depth on vertices V1-V8 (all non-zero values) and set active flag for F2 to false. V1 -— V2 -— V5--—V7 | F1 | F2 | F3 | V3 -— V4 -— V6--—V8

Implemented in QgsMeshExtraDatasetStore.

◆ persistDatasetGroup() [1/3]

virtual bool QgsMeshDatasetSourceInterface::persistDatasetGroup	(	const QString &	outputFilePath,
		const QString &	outputDriver,
		const QgsMeshDatasetGroupMetadata &	meta,
		const QVector< QgsMeshDataBlock > &	datasetValues,
		const QVector< QgsMeshDataBlock > &	datasetActive,
		const QVector< double > &	times
	)

pure virtual

Creates a new dataset group from a data and persists it into a destination path.

On success, the mesh's dataset group count is changed

Parameters

outputFilePath	destination path of the stored file
outputDriver	output driver name
meta	new group's metadata
datasetValues	scalar/vector values for all datasets and all faces/vertices in the group
datasetActive	active flag values for all datasets in the group. Empty array represents can be used when all faces are active
times	times in hours for all datasets in the group

Returns: true on failure, false on success

Since: QGIS 3.12.3

Implemented in QgsMeshExtraDatasetStore.

◆ persistDatasetGroup() [2/3]

virtual bool QgsMeshDatasetSourceInterface::persistDatasetGroup	(	const QString &	outputFilePath,
		const QString &	outputDriver,
		QgsMeshDatasetSourceInterface *	source,
		int	datasetGroupIndex
	)

pure virtual

Saves a an existing dataset group provided by source to a file with a specified driver.

On success, the mesh's dataset group count is changed

Parameters

outputFilePath	destination path of the stored file
outputDriver	output driver name
source	source of the dataset group
datasetGroupIndex	index of the dataset group in the source

Returns: true on failure, false on success

Since: QGIS 3.16

Implemented in QgsMeshExtraDatasetStore.

◆ persistDatasetGroup() [3/3]

bool QgsMeshDatasetSourceInterface::persistDatasetGroup	(	const QString &	path,
		const QgsMeshDatasetGroupMetadata &	meta,
		const QVector< QgsMeshDataBlock > &	datasetValues,
		const QVector< QgsMeshDataBlock > &	datasetActive,
		const QVector< double > &	times
	)

virtual

Creates a new dataset group from a data and persists it into a destination path.

On success, the mesh's dataset group count is changed

Parameters

path	destination path of the stored file in form DRIVER_NAME:path
meta	new group's metadata
datasetValues	scalar/vector values for all datasets and all faces/vertices in the group
datasetActive	active flag values for all datasets in the group. Empty array represents can be used when all faces are active
times	times in hours for all datasets in the group

Returns: true on failure, false on success

Note: Doesn't work if there is ":" in the path (e.g. Windows system)

Since: QGIS 3.6

Deprecated:: QGIS 3.12.3

Definition at line 128 of file qgsmeshdataprovider.cpp.

Member Data Documentation

◆ mTemporalCapabilities

std::unique_ptr<QgsMeshDataProviderTemporalCapabilities> QgsMeshDatasetSourceInterface::mTemporalCapabilities

protected

Definition at line 425 of file qgsmeshdataprovider.h.

The documentation for this class was generated from the following files:

/build/qgis-3.40.0+99sid/src/core/mesh/qgsmeshdataprovider.h
/build/qgis-3.40.0+99sid/src/core/mesh/qgsmeshdataprovider.cpp

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ QgsMeshDatasetSourceInterface()

◆ ~QgsMeshDatasetSourceInterface()

Member Function Documentation

◆ addDataset()

◆ areFacesActive()

◆ dataset3dValues()

◆ datasetCount() [1/2]

◆ datasetCount() [2/2]

◆ datasetGroupCount()

◆ datasetGroupMetadata() [1/2]

◆ datasetGroupMetadata() [2/2]

◆ datasetIndexAtTime()

◆ datasetIndexInTimeInterval()

◆ datasetMetadata()

◆ datasetValue()

◆ datasetValues()

◆ extraDatasets()

◆ isFaceActive()

◆ persistDatasetGroup() [1/3]

◆ persistDatasetGroup() [2/3]

◆ persistDatasetGroup() [3/3]

Member Data Documentation

◆ mTemporalCapabilities