Represents a dataset group calculated from a formula string. More...

#include <qgsmeshvirtualdatasetgroup.h>

Inheritance diagram for QgsMeshVirtualDatasetGroup:

Public Member Functions
	QgsMeshVirtualDatasetGroup (const QString &name, const QString &formulaString, QgsMeshLayer *layer, qint64 relativeStartTime, qint64 relativeEndTime)
	Constructor.

QgsMeshDataset *	dataset (int index) const override
	Returns the dataset with index.

int	datasetCount () const override
	Returns the count of datasets in the group.

QStringList	datasetGroupNamesDependentOn () const override
	Returns the dataset group variable name which this dataset group depends on.

QgsMeshDatasetMetadata	datasetMetadata (int datasetIndex) const override
	Returns the metadata of the dataset with index datasetIndex.

QString	description () const override
	Returns some information about the dataset group.

void	initialize () override
	Initialize the dataset group.

QgsMeshDatasetGroup::Type	type () const override
	Returns the type of dataset group.

QDomElement	writeXml (QDomDocument &doc, const QgsReadWriteContext &context) const override
	Write dataset group information in a DOM element.

Public Member Functions inherited from QgsMeshDatasetGroup
	QgsMeshDatasetGroup ()=default
	Default constructor.

	QgsMeshDatasetGroup (const QString &name)
	Constructor with the name of the dataset group.

	QgsMeshDatasetGroup (const QString &name, QgsMeshDatasetGroupMetadata::DataType dataType)
	Constructor with the name of the dataset group and the dataTYpe.

virtual	~QgsMeshDatasetGroup ()

void	addExtraMetadata (QString key, QString value)
	Adds extra metadata to the group.

void	calculateStatistic () const
	Calculates the statistics (minimum and maximum)

bool	checkValueCountPerDataset (int count) const
	Returns whether all the datasets contain count values.

QgsMeshDatasetGroupMetadata::DataType	dataType () const
	Returns the data type of the dataset group.

QMap< QString, QString >	extraMetadata () const
	Returns all the extra metadata of the group.

QgsMeshDatasetGroupMetadata	groupMetadata () const
	Returns the metadata of the dataset group.

bool	isScalar () const
	Returns whether the group contain scalar values.

double	maximum () const
	Returns the maximum value of the whole dataset group.

double	minimum () const
	Returns the minimum value of the whole dataset group.

QString	name () const
	Returns the name of the dataset group.

void	setDataType (const QgsMeshDatasetGroupMetadata::DataType &dataType)
	Sets the data type of the dataset group.

void	setIsScalar (bool isScalar)
	Sets whether the group contain scalar values.

void	setMinimumMaximum (double min, double max) const
	Overrides the minimum and the maximum value of the whole dataset group.

void	setName (const QString &name)
	Sets the name of the dataset group.

void	setReferenceTime (const QDateTime &referenceTime)
	Sets the reference time of the dataset group.

void	setStatisticObsolete () const
	Sets statistic obsolete, that means statistic will be recalculated when requested.

Additional Inherited Members
Public Types inherited from QgsMeshDatasetGroup
enum	Type { None , Persistent , Memory , Virtual }
	Type of the dataset group. More...

Protected Attributes inherited from QgsMeshDatasetGroup
QgsMeshDatasetGroupMetadata::DataType	mDataType = QgsMeshDatasetGroupMetadata::DataOnVertices

bool	mIsScalar = true

QMap< QString, QString >	mMetadata

QString	mName

Detailed Description

Represents a dataset group calculated from a formula string.

The calculation is done by the QgsMeshCalcUtils class from a QgsMeshCalcNode created from the formula Each dataset is calculted when needed, so there is only one dataset store in this class all the time.

Since: QGIS 3.16

Definition at line 38 of file qgsmeshvirtualdatasetgroup.h.

Constructor & Destructor Documentation

◆ QgsMeshVirtualDatasetGroup()

QgsMeshVirtualDatasetGroup::QgsMeshVirtualDatasetGroup	(	const QString &	name,
		const QString &	formulaString,
		QgsMeshLayer *	layer,
		qint64	relativeStartTime,
		qint64	relativeEndTime
	)

Constructor.

Parameters

name	name of the dataset group
formulaString	formula use to define the dataset group
layer	mesh layer that contains dataset group
relativeStartTime	relative time start, in mimliseconds, from the mesh layer provider reference time
relativeEndTime	relative time end, in mimliseconds, from the mesh layer provider reference time