QGIS API Documentation 3.29.0-Master (8c80f25a4f)
qgsvectorfilewriter.h
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1/***************************************************************************
2 qgsvectorfilewriter.h
3 generic vector file writer
4 -------------------
5 begin : Jun 6 2004
6 copyright : (C) 2004 by Tim Sutton
7 email : tim at linfiniti.com
8 ***************************************************************************/
9
10/***************************************************************************
11 * *
12 * This program is free software; you can redistribute it and/or modify *
13 * it under the terms of the GNU General Public License as published by *
14 * the Free Software Foundation; either version 2 of the License, or *
15 * (at your option) any later version. *
16 * *
17 ***************************************************************************/
18
19#ifndef QGSVECTORFILEWRITER_H
20#define QGSVECTORFILEWRITER_H
21
22#include "qgis_core.h"
23#include "qgis_sip.h"
24#include "qgsfields.h"
25#include "qgsfeedback.h"
26#include "qgstaskmanager.h"
27#include "qgsogrutils.h"
28#include "qgsrenderer.h"
29#include "qgsgeometryengine.h"
30#include "qgsfeaturesink.h"
31#include "qgsrendercontext.h"
32#include <ogr_api.h>
33
34class QgsSymbolLayer;
35class QTextCodec;
37
47class CORE_EXPORT QgsVectorFileWriter : public QgsFeatureSink
48{
49 public:
51 {
55 Hidden
56 };
57
61 class Option
62 {
63 public:
64 Option( const QString &docString, QgsVectorFileWriter::OptionType type )
65 : docString( docString )
66 , type( type ) {}
67 virtual ~Option() = default;
68
69 QString docString;
71 };
72
77 {
78 public:
79 SetOption( const QString &docString, const QStringList &values, const QString &defaultValue, bool allowNone = false )
80 : Option( docString, Set )
81 , values( values.begin(), values.end() )
82 , defaultValue( defaultValue )
83 , allowNone( allowNone )
84 {}
85
86 QSet<QString> values;
87 QString defaultValue;
89 };
90
95 {
96 public:
97 StringOption( const QString &docString, const QString &defaultValue = QString() )
98 : Option( docString, String )
99 , defaultValue( defaultValue )
100 {}
101
103 };
104
109 {
110 public:
111 IntOption( const QString &docString, int defaultValue )
112 : Option( docString, Int )
113 , defaultValue( defaultValue )
114 {}
115
117 };
118
123 {
124 public:
125 BoolOption( const QString &docString, bool defaultValue )
126 : SetOption( docString, QStringList() << QStringLiteral( "YES" ) << QStringLiteral( "NO" ), defaultValue ? "YES" : "NO" )
127 {}
128 };
129
134 {
135 public:
136 explicit HiddenOption( const QString &value )
137 : Option( QString(), Hidden )
138 , mValue( value )
139 {}
140
141 QString mValue;
142 };
143
144 struct MetaData
145 {
147 MetaData() = default;
148
149 MetaData( const QString &longName, const QString &trLongName, const QString &glob, const QString &ext, const QMap<QString, QgsVectorFileWriter::Option *> &driverOptions, const QMap<QString, QgsVectorFileWriter::Option *> &layerOptions, const QString &compulsoryEncoding = QString() )
150 : longName( longName )
151 , trLongName( trLongName )
152 , glob( glob )
153 , ext( ext )
154 , driverOptions( driverOptions )
155 , layerOptions( layerOptions )
156 , compulsoryEncoding( compulsoryEncoding )
157 {}
158
159 QString longName;
160 QString trLongName;
161 QString glob;
162 QString ext;
163 QMap<QString, QgsVectorFileWriter::Option *> driverOptions;
164 QMap<QString, QgsVectorFileWriter::Option *> layerOptions;
167 };
168
170 {
171 NoError = 0,
182 };
183
185 {
186 NoSymbology = 0, //export only data
187 FeatureSymbology, //Keeps the number of features and export symbology per feature
188 SymbolLayerSymbology //Exports one feature per symbol layer (considering symbol levels)
189 };
190
197 {
198 Original = 0,
200 };
201
207 {
208 SortRecommended = 1 << 1,
209 SkipNonSpatialFormats = 1 << 2,
210 };
211 Q_DECLARE_FLAGS( VectorFormatOptions, VectorFormatOption )
212
213
218 class CORE_EXPORT FieldValueConverter
219 {
220 public:
223
224 virtual ~FieldValueConverter() = default;
225
231 virtual QgsField fieldDefinition( const QgsField &field );
232
239 virtual QVariant convert( int fieldIdxInLayer, const QVariant &value );
240
245 };
246
252 {
254 CanAddNewLayer = 1 << 0,
255
257 CanAppendToExistingLayer = 1 << 1,
258
260 CanAddNewFieldsToExistingLayer = 1 << 2,
261
263 CanDeleteLayer = 1 << 3
264 };
265
270 Q_DECLARE_FLAGS( EditionCapabilities, EditionCapability )
271
272
277 {
280
283
286
288 AppendToLayerAddFields
289 };
290
291#ifndef SIP_RUN
292
318#else
319
344#endif
345 Q_DECL_DEPRECATED static QgsVectorFileWriter::WriterError writeAsVectorFormat( QgsVectorLayer *layer,
346 const QString &fileName,
347 const QString &fileEncoding,
349 const QString &driverName = "GPKG",
350 bool onlySelected = false,
351 QString *errorMessage SIP_OUT = nullptr,
352 const QStringList &datasourceOptions = QStringList(),
353 const QStringList &layerOptions = QStringList(),
354 bool skipAttributeCreation = false,
355 QString *newFilename = nullptr,
357 double symbologyScale = 1.0,
358 const QgsRectangle *filterExtent = nullptr,
359 QgsWkbTypes::Type overrideGeometryType = QgsWkbTypes::Unknown,
360 bool forceMulti = false,
361 bool includeZ = false,
362 const QgsAttributeList &attributes = QgsAttributeList(),
363 QgsVectorFileWriter::FieldValueConverter *fieldValueConverter = nullptr
364#ifndef SIP_RUN
365 , QString *newLayer = nullptr );
366#else
368#endif
369
370#ifndef SIP_RUN
371
399#else
400
427#endif
428 Q_DECL_DEPRECATED static QgsVectorFileWriter::WriterError writeAsVectorFormat( QgsVectorLayer *layer,
429 const QString &fileName,
430 const QString &fileEncoding,
431 const QgsCoordinateTransform &ct,
432 const QString &driverName = "GPKG",
433 bool onlySelected = false,
434 QString *errorMessage SIP_OUT = nullptr,
435 const QStringList &datasourceOptions = QStringList(),
436 const QStringList &layerOptions = QStringList(),
437 bool skipAttributeCreation = false,
438 QString *newFilename = nullptr,
440 double symbologyScale = 1.0,
441 const QgsRectangle *filterExtent = nullptr,
442 QgsWkbTypes::Type overrideGeometryType = QgsWkbTypes::Unknown,
443 bool forceMulti = false,
444 bool includeZ = false,
445 const QgsAttributeList &attributes = QgsAttributeList(),
446 QgsVectorFileWriter::FieldValueConverter *fieldValueConverter = nullptr
447#ifndef SIP_RUN
448 , QString *newLayer = nullptr );
449#else
451#endif
452
458 class CORE_EXPORT SaveVectorOptions
459 {
460 public:
463
464 virtual ~SaveVectorOptions() = default;
465
467 QString driverName;
468
470 QString layerName;
471
473 QgsVectorFileWriter::ActionOnExistingFile actionOnExistingFile = CreateOrOverwriteFile;
474
477
483
485 bool onlySelectedFeatures = false;
486
488 QStringList datasourceOptions;
489
491 QStringList layerOptions;
492
494 bool skipAttributeCreation = false;
495
498
501
503 QgsVectorFileWriter::SymbologyExport symbologyExport = NoSymbology;
504
506 double symbologyScale = 1.0;
507
510
516
518 bool forceMulti = false;
519
521 bool includeZ = false;
522
529 QgsVectorFileWriter::FieldValueConverter *fieldValueConverter = nullptr;
530
532 QgsFeedback *feedback = nullptr;
533
539 FieldNameSource fieldNameSource = Original;
540
547 bool saveMetadata = false;
548
556 };
557
558#ifndef SIP_RUN
559
571#else
572
583#endif
584 Q_DECL_DEPRECATED static QgsVectorFileWriter::WriterError writeAsVectorFormat( QgsVectorLayer *layer,
585 const QString &fileName,
587 QString *newFilename = nullptr,
588 QString *errorMessage SIP_OUT = nullptr
589#ifndef SIP_RUN
590 , QString *newLayer = nullptr );
591#else
593#endif
594
599 Q_DECL_DEPRECATED QgsVectorFileWriter( const QString &vectorFileName,
600 const QString &fileEncoding,
601 const QgsFields &fields,
602 QgsWkbTypes::Type geometryType,
604 const QString &driverName = "GPKG",
605 const QStringList &datasourceOptions = QStringList(),
606 const QStringList &layerOptions = QStringList(),
607 QString *newFilename = nullptr,
609 QgsFeatureSink::SinkFlags sinkFlags = QgsFeatureSink::SinkFlags()
610#ifndef SIP_RUN
611 , QString *newLayer = nullptr,
613 FieldNameSource fieldNameSource = Original
614#endif
616
639 Q_DECL_DEPRECATED QgsVectorFileWriter( const QString &vectorFileName,
640 const QString &fileEncoding,
641 const QgsFields &fields,
642 QgsWkbTypes::Type geometryType,
644 const QString &driverName,
645 const QStringList &datasourceOptions,
646 const QStringList &layerOptions,
647 QString *newFilename,
649 QgsVectorFileWriter::FieldValueConverter *fieldValueConverter,
650 const QString &layerName,
652 QString *newLayer = nullptr,
654 QgsFeatureSink::SinkFlags sinkFlags = QgsFeatureSink::SinkFlags(),
655 FieldNameSource fieldNameSource = Original
656 ) SIP_SKIP;
657
662
676 static QgsVectorFileWriter *create( const QString &fileName,
677 const QgsFields &fields,
678 QgsWkbTypes::Type geometryType,
680 const QgsCoordinateTransformContext &transformContext,
682 QgsFeatureSink::SinkFlags sinkFlags = QgsFeatureSink::SinkFlags(),
683 QString *newFilename = nullptr,
684 QString *newLayer = nullptr ) SIP_FACTORY;
685
698 Q_DECL_DEPRECATED static QgsVectorFileWriter::WriterError writeAsVectorFormatV2( QgsVectorLayer *layer,
699 const QString &fileName,
700 const QgsCoordinateTransformContext &transformContext,
702 QString *newFilename = nullptr,
703 QString *newLayer = nullptr,
704 QString *errorMessage SIP_OUT = nullptr ) SIP_DEPRECATED;
705
718 static QgsVectorFileWriter::WriterError writeAsVectorFormatV3( QgsVectorLayer *layer,
719 const QString &fileName,
720 const QgsCoordinateTransformContext &transformContext,
722 QString *errorMessage SIP_OUT = nullptr,
723 QString *newFilename SIP_OUT = nullptr,
724 QString *newLayer SIP_OUT = nullptr );
725
731 {
733 QString driverName;
734
737
742 QStringList globs;
743 };
744
753 static QList< QgsVectorFileWriter::FilterFormatDetails > supportedFiltersAndFormats( VectorFormatOptions options = SortRecommended );
754
764 static QStringList supportedFormatExtensions( VectorFormatOptions options = SortRecommended );
765
773 static bool supportsFeatureStyles( const QString &driverName );
774
780 {
782 QString longName;
783
785 QString driverName;
786 };
787
799 static QList< QgsVectorFileWriter::DriverDetails > ogrDriverList( VectorFormatOptions options = SortRecommended );
800
807 static QString driverForExtension( const QString &extension );
808
815 static QString fileFilterString( VectorFormatOptions options = SortRecommended );
816
818 static QString filterForDriver( const QString &driverName );
819
821 static QString convertCodecNameForEncodingOption( const QString &codecName );
822
824 QgsVectorFileWriter::WriterError hasError() const;
825
827 QString errorMessage() const;
828
829 bool addFeature( QgsFeature &feature, QgsFeatureSink::Flags flags = QgsFeatureSink::Flags() ) override;
830 bool addFeatures( QgsFeatureList &features, QgsFeatureSink::Flags flags = QgsFeatureSink::Flags() ) override;
831 QString lastError() const override;
832
837 bool addFeatureWithStyle( QgsFeature &feature, QgsFeatureRenderer *renderer, QgsUnitTypes::DistanceUnit outputUnit = QgsUnitTypes::DistanceMeters );
838
840 QMap<int, int> attrIdxToOgrIdx() const { return mAttrIdxToOgrIdx; } SIP_SKIP
841
843 ~QgsVectorFileWriter() override;
844
850 static bool deleteShapeFile( const QString &fileName );
851
852 QgsVectorFileWriter::SymbologyExport symbologyExport() const { return mSymbologyExport; }
853 void setSymbologyExport( QgsVectorFileWriter::SymbologyExport symExport ) { mSymbologyExport = symExport; }
854
861 double symbologyScale() const { return mSymbologyScale; }
862
869 void setSymbologyScale( double scale );
870
871 static bool driverMetadata( const QString &driverName, MetaData &driverMetadata );
872
879 static QStringList defaultDatasetOptions( const QString &driverName );
880
887 static QStringList defaultLayerOptions( const QString &driverName );
888
895 static OGRwkbGeometryType ogrTypeFromWkbType( QgsWkbTypes::Type type ) SIP_SKIP;
896
901 static QgsVectorFileWriter::EditionCapabilities editionCapabilities( const QString &datasetName );
902
907 static bool targetLayerExists( const QString &datasetName,
908 const QString &layerName );
909
914 static bool areThereNewFieldsToCreate( const QString &datasetName,
915 const QString &layerName,
916 QgsVectorLayer *layer,
917 const QgsAttributeList &attributes );
918
919 protected:
921 OGRGeometryH createEmptyGeometry( QgsWkbTypes::Type wkbType ) SIP_SKIP;
922
924 OGRLayerH mLayer = nullptr;
925 OGRSpatialReferenceH mOgrRef = nullptr;
926
928
932
933 QTextCodec *mCodec = nullptr;
934
937
939 QMap<int, int> mAttrIdxToOgrIdx;
940
942
943 QMap< QgsSymbolLayer *, QString > mSymbolLayerTable;
944
947
949
951 FieldValueConverter *mFieldValueConverter = nullptr;
952
953 private:
954#ifdef SIP_RUN
956#endif
957
958 struct PreparedWriterDetails
959 {
960 std::unique_ptr< QgsFeatureRenderer > renderer;
963 QgsFields sourceFields;
964 QString providerType;
965 long long featureCount = 0;
966 QgsFeatureIds selectedFeatureIds;
967 QString dataSourceUri;
968 QString storageType;
969 QgsFeatureIterator geometryTypeScanIterator;
970 QgsExpressionContext expressionContext;
971 QSet< int > fieldsToConvertToInt;
972 QgsRenderContext renderContext;
973 bool shallTransform = false;
976 QgsAttributeList attributes;
977 QgsFields outputFields;
978 QgsFeatureIterator sourceFeatureIterator;
979 QgsGeometry filterRectGeometry;
980 std::unique_ptr< QgsGeometryEngine > filterRectEngine;
981 QVariantMap providerUriParams;
982 };
983
988 static QgsVectorFileWriter::WriterError prepareWriteAsVectorFormat( QgsVectorLayer *layer,
990 PreparedWriterDetails &details );
991
1005 static QgsVectorFileWriter::WriterError writeAsVectorFormatV2( PreparedWriterDetails &details,
1006 const QString &fileName,
1007 const QgsCoordinateTransformContext &transformContext,
1009 QString *newFilename = nullptr,
1010 QString *newLayer = nullptr,
1011 QString *errorMessage SIP_OUT = nullptr );
1012
1018 Q_DECL_DEPRECATED static QgsVectorFileWriter::WriterError writeAsVectorFormat( PreparedWriterDetails &details,
1019 const QString &fileName,
1021 QString *newFilename = nullptr,
1022 QString *errorMessage SIP_OUT = nullptr,
1023 QString *newLayer = nullptr ) SIP_DEPRECATED;
1024
1025 void init( QString vectorFileName, QString fileEncoding, const QgsFields &fields,
1026 QgsWkbTypes::Type geometryType, QgsCoordinateReferenceSystem srs,
1027 const QString &driverName, QStringList datasourceOptions,
1028 QStringList layerOptions, QString *newFilename,
1029 QgsVectorFileWriter::FieldValueConverter *fieldValueConverter,
1030 const QString &layerName,
1031 QgsVectorFileWriter::ActionOnExistingFile action, QString *newLayer, QgsFeatureSink::SinkFlags sinkFlags,
1032 const QgsCoordinateTransformContext &transformContext,
1033 FieldNameSource fieldNameSource );
1034 void resetMap( const QgsAttributeList &attributes );
1035
1036 std::unique_ptr< QgsFeatureRenderer > mRenderer;
1037 QgsRenderContext mRenderContext;
1038
1039
1040 std::unique_ptr< QgsCoordinateTransform > mCoordinateTransform;
1041
1042 bool mUsingTransaction = false;
1043 QSet< QVariant::Type > mSupportedListSubTypes;
1044
1045 void createSymbolLayerTable( QgsVectorLayer *vl, const QgsCoordinateTransform &ct, OGRDataSourceH ds );
1046 gdal::ogr_feature_unique_ptr createFeature( const QgsFeature &feature );
1047 bool writeFeature( OGRLayerH layer, OGRFeatureH feature );
1048
1050 QgsVectorFileWriter::WriterError exportFeaturesSymbolLevels( const PreparedWriterDetails &details, QgsFeatureIterator &fit, const QgsCoordinateTransform &ct, QString *errorMessage = nullptr );
1051 double mmScaleFactor( double scale, QgsUnitTypes::RenderUnit symbolUnits, QgsUnitTypes::DistanceUnit mapUnits );
1052 double mapUnitScaleFactor( double scale, QgsUnitTypes::RenderUnit symbolUnits, QgsUnitTypes::DistanceUnit mapUnits );
1053
1054 void startRender( QgsFeatureRenderer *sourceRenderer, const QgsFields &fields );
1055 void stopRender();
1056 std::unique_ptr< QgsFeatureRenderer > createSymbologyRenderer( QgsFeatureRenderer *sourceRenderer ) const;
1058 static void addRendererAttributes( QgsFeatureRenderer *renderer, QgsRenderContext &context, const QgsFields &fields, QgsAttributeList &attList );
1059
1061 static QStringList concatenateOptions( const QMap<QString, Option *> &options );
1062
1064 friend class TestQgsVectorFileWriter;
1065};
1066
1069
1070// clazy:excludeall=qstring-allocations
1071
1072#endif
This class represents a coordinate reference system (CRS).
Contains information about the context in which a coordinate transform is executed.
Class for doing transforms between two map coordinate systems.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
Wrapper for iterator of features from vector data provider or vector layer.
An interface for objects which accept features via addFeature(s) methods.
virtual bool addFeature(QgsFeature &feature, QgsFeatureSink::Flags flags=QgsFeatureSink::Flags())
Adds a single feature to the sink.
virtual QString lastError() const
Returns the most recent error encountered by the sink, e.g.
virtual bool addFeatures(QgsFeatureList &features, QgsFeatureSink::Flags flags=QgsFeatureSink::Flags())=0
Adds a list of features to the sink.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition: qgsfeature.h:56
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
Encapsulate a field in an attribute table or data source.
Definition: qgsfield.h:51
Container of fields for a vector layer.
Definition: qgsfields.h:45
A geometry is the spatial representation of a feature.
Definition: qgsgeometry.h:164
A structured metadata store for a map layer.
A rectangle specified with double values.
Definition: qgsrectangle.h:42
Contains information about the context of a rendering operation.
Helper functions for various unit types.
Definition: qgsunittypes.h:39
DistanceUnit
Units of distance.
Definition: qgsunittypes.h:68
@ DistanceMeters
Meters.
Definition: qgsunittypes.h:69
QgsTask task which performs a QgsVectorFileWriter layer saving operation as a background task.
BoolOption(const QString &docString, bool defaultValue)
Interface to convert raw field values to their user-friendly value.
FieldValueConverter()=default
Constructor.
IntOption(const QString &docString, int defaultValue)
Option(const QString &docString, QgsVectorFileWriter::OptionType type)
QgsVectorFileWriter::OptionType type
virtual ~Option()=default
Options to pass to writeAsVectorFormat()
QgsCoordinateTransform ct
Transform to reproject exported geometries with, or invalid transform for no transformation.
QStringList attributesExportNames
Attributes export names.
QgsLayerMetadata layerMetadata
Layer metadata to save for the exported vector file.
QString layerName
Layer name. If let empty, it will be derived from the filename.
QgsRectangle filterExtent
If not empty, only features intersecting the extent will be saved.
QStringList layerOptions
List of OGR layer creation options.
QgsAttributeList attributes
Attributes to export (empty means all unless skipAttributeCreation is set)
QStringList datasourceOptions
List of OGR data source creation options.
SetOption(const QString &docString, const QStringList &values, const QString &defaultValue, bool allowNone=false)
StringOption(const QString &docString, const QString &defaultValue=QString())
A convenience class for writing vector layers to disk based formats (e.g.
EditionCapability
Edition capability flags.
double mSymbologyScale
Scale for symbology export (e.g. for symbols units in map units)
QMap< int, int > attrIdxToOgrIdx() const
QMap< int, int > mAttrIdxToOgrIdx
Map attribute indizes to OGR field indexes.
@ Canceled
Writing was interrupted by manual cancellation.
@ ErrSavingMetadata
Metadata saving failed.
gdal::ogr_datasource_unique_ptr mDS
QgsVectorFileWriter & operator=(const QgsVectorFileWriter &rh)=delete
QgsVectorFileWriter cannot be copied.
QgsVectorFileWriter(const QgsVectorFileWriter &rh)=delete
QgsVectorFileWriter cannot be copied.
double symbologyScale() const
Returns the reference scale for output.
SymbologyExport mSymbologyExport
QgsWkbTypes::Type mWkbType
Geometry type which is being used.
VectorFormatOption
Options for sorting and filtering vector formats.
void setSymbologyExport(QgsVectorFileWriter::SymbologyExport symExport)
WriterError mError
Contains error value if construction was not successful.
FieldNameSource
Source for exported field names.
@ PreferAlias
Use the field alias as the exported field name, wherever one is set. Otherwise use the original field...
QgsVectorFileWriter::SymbologyExport symbologyExport() const
QMap< QgsSymbolLayer *, QString > mSymbolLayerTable
ActionOnExistingFile
Combination of CanAddNewLayer, CanAppendToExistingLayer, CanAddNewFieldsToExistingLayer or CanDeleteL...
@ CreateOrOverwriteLayer
Create or overwrite layer.
@ CreateOrOverwriteFile
Create or overwrite file.
@ AppendToLayerNoNewFields
Append features to existing layer, but do not create new fields.
Represents a vector layer which manages a vector based data sets.
Handles storage of information regarding WKB types and their properties.
Definition: qgswkbtypes.h:42
Type
The WKB type describes the number of dimensions a geometry has.
Definition: qgswkbtypes.h:70
std::unique_ptr< std::remove_pointer< OGRFeatureH >::type, OGRFeatureDeleter > ogr_feature_unique_ptr
Scoped OGR feature.
Definition: qgsogrutils.h:152
std::unique_ptr< std::remove_pointer< OGRDataSourceH >::type, OGRDataSourceDeleter > ogr_datasource_unique_ptr
Scoped OGR data source.
Definition: qgsogrutils.h:137
std::unique_ptr< GEOSGeometry, GeosDeleter > unique_ptr
Scoped GEOS pointer.
Definition: qgsgeos.h:74
#define SIP_DEPRECATED
Definition: qgis_sip.h:106
#define SIP_SKIP
Definition: qgis_sip.h:126
#define SIP_OUT
Definition: qgis_sip.h:58
#define SIP_FACTORY
Definition: qgis_sip.h:76
void * OGRSpatialReferenceH
QList< QgsFeature > QgsFeatureList
Definition: qgsfeature.h:922
QSet< QgsFeatureId > QgsFeatureIds
Definition: qgsfeatureid.h:37
QList< int > QgsAttributeList
Definition: qgsfield.h:26
const QgsField & field
Definition: qgsfield.h:463
Q_DECLARE_OPERATORS_FOR_FLAGS(QgsField::ConfigurationFlags) CORE_EXPORT QDataStream &operator<<(QDataStream &out
Writes the field to stream out. QGIS version compatibility is not guaranteed.
const QgsCoordinateReferenceSystem & outputCrs
Details of available driver formats.
QString longName
Descriptive, user friendly name for the driver.
QString driverName
Unique driver name.
Details of available filters and formats.
QString filterString
Filter string for file picker dialogs.
QStringList globs
Matching glob patterns for format, e.g.
MetaData(const QString &longName, const QString &trLongName, const QString &glob, const QString &ext, const QMap< QString, QgsVectorFileWriter::Option * > &driverOptions, const QMap< QString, QgsVectorFileWriter::Option * > &layerOptions, const QString &compulsoryEncoding=QString())
MetaData()=default
Constructor for MetaData.
QMap< QString, QgsVectorFileWriter::Option * > driverOptions
QMap< QString, QgsVectorFileWriter::Option * > layerOptions
QString compulsoryEncoding
Some formats require a compulsory encoding, typically UTF-8. If no compulsory encoding,...