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)
	Emitted when data reading progresses or the total number of bytes to read changes.
void	dataReadProgress (int progress)
	Emitted when data reading progresses.
void	totalStepsUpdate (int totalSteps)
	Emitted when the total number of bytes to read changes.

Public Member Functions
	QgsGml (const QString &typeName, const QString &geometryAttribute, const QgsFields &fields)
QgsCoordinateReferenceSystem	crs () const
	Returns the spatial reference system for features.
QMap< QgsFeatureId, QgsFeature * >	featuresMap () const
	Gets parsed features for given type name.
int	getFeatures (const QByteArray &data, Qgis::WkbType *wkbType, QgsRectangle *extent=nullptr)
	Read from GML data.
int	getFeatures (const QString &uri, Qgis::WkbType *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.
QMap< QgsFeatureId, QString >	idsMap () const
	Gets feature ids map.

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 387 of file qgsgml.h.

Constructor & Destructor Documentation

QgsGml()

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

Definition at line 54 of file qgsgml.cpp.

Member Function Documentation

crs()

QgsCoordinateReferenceSystem QgsGml::crs

(

)

const

Returns the spatial reference system for features.

Definition at line 272 of file qgsgml.cpp.

dataProgressAndSteps

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

signal

Emitted when data reading progresses or the total number of bytes to read changes.

Parameters

progress	specifies the number of bytes processed so far
totalSteps	specifies the total number of bytes which must be processed

dataReadProgress

void QgsGml::dataReadProgress ( int  progress )

signal

Emitted when data reading progresses.

Parameters

progress

specifies the number of bytes processed so far

featuresMap()

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

inline

Gets parsed features for given type name.

Definition at line 423 of file qgsgml.h.

getFeatures() [1/2]

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

Read from GML data.

The constructor uri param is ignored.

Definition at line 187 of file qgsgml.cpp.

getFeatures() [2/2]

int QgsGml::getFeatures	(	const QString &	uri,
		Qgis::WkbType *	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.

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 69 of file qgsgml.cpp.

idsMap()

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

inline

Gets feature ids map.

Definition at line 426 of file qgsgml.h.

totalStepsUpdate

void QgsGml::totalStepsUpdate ( int  totalSteps )

signal

Emitted when the total number of bytes to read changes.

Parameters

totalSteps

specifies the total number of bytes which must be processed

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

• /build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/core/qgsgml.h
• /build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/core/qgsgml.cpp