QgsGml Class Reference

This class reads data from a WFS server or alternatively from a GML file. More...

#include <qgsgml.h>

Inheritance diagram for QgsGml:

Signals
void	dataProgressAndSteps (int progress, int totalSteps)
	Also emit signal with progress and totalSteps together (this is better for the status message) More...
void	dataReadProgress (int progress)
void	totalStepsUpdate (int totalSteps)

Public Member Functions
	QgsGml (const QString &typeName, const QString &geometryAttribute, const QgsFields &fields)
QgsCoordinateReferenceSystem	crs () const
	Returns features spatial reference system. More...
QMap< QgsFeatureId, QgsFeature * >	featuresMap () const
	Gets parsed features for given type name. More...
int	getFeatures (const QByteArray &data, QgsWkbTypes::Type *wkbType, QgsRectangle *extent=nullptr)
	Read from GML data. More...
int	getFeatures (const QString &uri, QgsWkbTypes::Type *wkbType, QgsRectangle *extent=nullptr, const QString &userName=QString(), const QString &password=QString(), const QString &authcfg=QString())
	Does the Http GET request to the wfs server Supports only UTF-8, UTF-16, ISO-8859-1, ISO-8859-1 XML encodings. More...
QMap< QgsFeatureId, QString >	idsMap () const
	Gets feature ids map. More...

Detailed Description

This class reads data from a WFS server or alternatively from a GML file.

It uses the expat XML parser and an event based model to keep performance high. The parsing starts when the first data arrives, it does not wait until the request is finished

Definition at line 360 of file qgsgml.h.

Constructor & Destructor Documentation

QgsGml()

QgsGml::QgsGml	(	const QString &	typeName,
		const QString &	geometryAttribute,
		const QgsFields &	fields
	)

Definition at line 43 of file qgsgml.cpp.

Member Function Documentation

crs()

QgsCoordinateReferenceSystem QgsGml::crs

(

)

const

Returns features spatial reference system.

Since

QGIS 2.1

Definition at line 261 of file qgsgml.cpp.

dataProgressAndSteps

void QgsGml::dataProgressAndSteps ( int  progress, int  totalSteps  )

signal

Also emit signal with progress and totalSteps together (this is better for the status message)

dataReadProgress

void QgsGml::dataReadProgress ( int  progress )

signal

featuresMap()

QMap<QgsFeatureId, QgsFeature * > QgsGml::featuresMap ( ) const

inline

Gets parsed features for given type name.

Definition at line 395 of file qgsgml.h.

getFeatures() [1/2]

int QgsGml::getFeatures	(	const QByteArray &	data,
		QgsWkbTypes::Type *	wkbType,
		QgsRectangle *	extent = nullptr
	)

Read from GML data.

Constructor uri param is ignored Supports only UTF-8, UTF-16, ISO-8859-1, ISO-8859-1 XML encodings.

Definition at line 176 of file qgsgml.cpp.

getFeatures() [2/2]

int QgsGml::getFeatures	(	const QString &	uri,
		QgsWkbTypes::Type *	wkbType,
		QgsRectangle *	extent = nullptr,
		const QString &	userName = QString(),
		const QString &	password = QString(),
		const QString &	authcfg = QString()
	)

Does the Http GET request to the wfs server Supports only UTF-8, UTF-16, ISO-8859-1, ISO-8859-1 XML encodings.

Parameters

uri	GML URL
wkbType	wkbType to retrieve
extent	retrieved extents
userName	username for authentication
password	password for authentication
authcfg	authentication configuration id

Returns

0 in case of success

Note

available in Python as getFeaturesUri

Definition at line 58 of file qgsgml.cpp.

idsMap()

QMap<QgsFeatureId, QString > QgsGml::idsMap ( ) const

inline

Gets feature ids map.

Definition at line 398 of file qgsgml.h.

totalStepsUpdate

void QgsGml::totalStepsUpdate ( int  totalSteps )

signal

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

• /build/qgis-3.20.0+99unstable/src/core/qgsgml.h
• /build/qgis-3.20.0+99unstable/src/core/qgsgml.cpp