QgsVectorLayerImport Class Reference

A convenience class for writing vector files to disk. More...

#include <qgsvectorlayerimport.h>

Public Types
enum	ImportError {   NoError = 0, ErrDriverNotFound, ErrCreateDataSource, ErrCreateLayer,   ErrAttributeTypeUnsupported, ErrAttributeCreationFailed, ErrProjection, ErrFeatureWriteFailed,   ErrInvalidLayer, ErrInvalidProvider, ErrProviderUnsupportedFeature, ErrConnectionFailed }

Public Member Functions
	QgsVectorLayerImport (const QString &uri, const QString &provider, const QgsFields &fields, QGis::WkbType geometryType, const QgsCoordinateReferenceSystem *crs, bool overwrite=false, const QMap< QString, QVariant > *options=0, QProgressDialog *progress=0)
	create a empty layer and add fields to it
	~QgsVectorLayerImport ()
	close the new created layer
bool	addFeature (QgsFeature &feature)
	add feature to the new created layer
int	errorCount () const
QString	errorMessage ()
	retrieves error message
ImportError	hasError ()
	checks whether there were any errors

Static Public Member Functions
static ImportError	importLayer (QgsVectorLayer *layer, const QString &uri, const QString &providerKey, const QgsCoordinateReferenceSystem *destCRS, bool onlySelected=false, QString *errorMessage=0, bool skipAttributeCreation=false, QMap< QString, QVariant > *options=0, QProgressDialog *progress=0)
	Write contents of vector layer to a different datasource.

Protected Member Functions
bool	createSpatialIndex ()
	create index
bool	flushBuffer ()
	flush the buffer writing the features to the new layer

Protected Attributes
int	mAttributeCount
ImportError	mError
	contains error value
int	mErrorCount
QString	mErrorMessage
QgsFeatureList	mFeatureBuffer
QMap< int, int >	mOldToNewAttrIdx
	map attribute indexes to new field indexes
QProgressDialog *	mProgress
QgsVectorDataProvider *	mProvider

Detailed Description

A convenience class for writing vector files to disk.

There are two possibilities how to use this class:

1. static call to QgsVectorFileWriter::writeAsShapefile(...) which saves the whole vector layer
2. create an instance of the class and issue calls to addFeature(...)

Currently supports only writing to shapefiles, but shouldn't be a problem to add capability to support other OGR-writable formats.

Definition at line 36 of file qgsvectorlayerimport.h.

Member Enumeration Documentation

enum QgsVectorLayerImport::ImportError

Enumerator:

NoError
ErrDriverNotFound
ErrCreateDataSource
ErrCreateLayer
ErrAttributeTypeUnsupported
ErrAttributeCreationFailed
ErrProjection
ErrFeatureWriteFailed
ErrInvalidLayer
ErrInvalidProvider
ErrProviderUnsupportedFeature
ErrConnectionFailed

Definition at line 40 of file qgsvectorlayerimport.h.

Constructor & Destructor Documentation

QgsVectorLayerImport::QgsVectorLayerImport	(	const QString &	uri,
		const QString &	provider,
		const QgsFields &	fields,
		QGis::WkbType	geometryType,
		const QgsCoordinateReferenceSystem *	crs,
		bool	overwrite = false,
		const QMap< QString, QVariant > *	options = 0,
		QProgressDialog *	progress = 0
	)

create a empty layer and add fields to it

Definition at line 45 of file qgsvectorlayerimport.cpp.

QgsVectorLayerImport::~QgsVectorLayerImport

(

)

close the new created layer

Definition at line 116 of file qgsvectorlayerimport.cpp.

Member Function Documentation

bool QgsVectorLayerImport::addFeature

(

QgsFeature &

feature

)

add feature to the new created layer

Definition at line 134 of file qgsvectorlayerimport.cpp.

bool QgsVectorLayerImport::createSpatialIndex ( )

protected

create index

Definition at line 193 of file qgsvectorlayerimport.cpp.

int QgsVectorLayerImport::errorCount ( ) const

inline

Definition at line 85 of file qgsvectorlayerimport.h.

QString QgsVectorLayerImport::errorMessage

(

)

retrieves error message

Definition at line 129 of file qgsvectorlayerimport.cpp.

bool QgsVectorLayerImport::flushBuffer ( )

protected

flush the buffer writing the features to the new layer

Definition at line 166 of file qgsvectorlayerimport.cpp.

QgsVectorLayerImport::ImportError QgsVectorLayerImport::hasError

(

)

checks whether there were any errors

Definition at line 124 of file qgsvectorlayerimport.cpp.

QgsVectorLayerImport::ImportError QgsVectorLayerImport::importLayer ( QgsVectorLayer *  layer, const QString &  uri, const QString &  providerKey, const QgsCoordinateReferenceSystem *  destCRS, bool  onlySelected = false, QString *  errorMessage = 0, bool  skipAttributeCreation = false, QMap< QString, QVariant > *  options = 0, QProgressDialog *  progress = 0  )

static

Write contents of vector layer to a different datasource.

Definition at line 206 of file qgsvectorlayerimport.cpp.

Member Data Documentation

int QgsVectorLayerImport::mAttributeCount

protected

Definition at line 110 of file qgsvectorlayerimport.h.

ImportError QgsVectorLayerImport::mError

protected

contains error value

Definition at line 101 of file qgsvectorlayerimport.h.

int QgsVectorLayerImport::mErrorCount

protected

Definition at line 104 of file qgsvectorlayerimport.h.

QString QgsVectorLayerImport::mErrorMessage

protected

Definition at line 102 of file qgsvectorlayerimport.h.

QgsFeatureList QgsVectorLayerImport::mFeatureBuffer

protected

Definition at line 112 of file qgsvectorlayerimport.h.

QMap<int, int> QgsVectorLayerImport::mOldToNewAttrIdx

protected

map attribute indexes to new field indexes

Definition at line 109 of file qgsvectorlayerimport.h.

QProgressDialog* QgsVectorLayerImport::mProgress

protected

Definition at line 113 of file qgsvectorlayerimport.h.

QgsVectorDataProvider* QgsVectorLayerImport::mProvider

protected

Definition at line 106 of file qgsvectorlayerimport.h.

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

• /tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgsvectorlayerimport.h
• /tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgsvectorlayerimport.cpp