mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-24 00:47:57 -05:00
319 lines
9.3 KiB
Plaintext
319 lines
9.3 KiB
Plaintext
/************************************************************************
|
|
* This file has been generated automatically from *
|
|
* *
|
|
* src/core/qgsjsonutils.h *
|
|
* *
|
|
* Do not edit manually ! Edit header and run scripts/sipify.pl again *
|
|
************************************************************************/
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class QgsJsonExporter
|
|
{
|
|
%Docstring
|
|
Handles exporting QgsFeature features to GeoJSON features.
|
|
|
|
Note that geometries will be automatically reprojected to WGS84 to match GeoJSON spec
|
|
if either the source vector layer or source CRS is set.
|
|
|
|
.. versionadded:: 2.16
|
|
%End
|
|
|
|
%TypeHeaderCode
|
|
#include "qgsjsonutils.h"
|
|
%End
|
|
public:
|
|
|
|
QgsJsonExporter( QgsVectorLayer *vectorLayer = 0, int precision = 6 );
|
|
%Docstring
|
|
Constructor for QgsJsonExporter.
|
|
|
|
:param vectorLayer: associated vector layer (required for related attribute export)
|
|
:param precision: maximum number of decimal places to use for geometry coordinates,
|
|
the RFC 7946 GeoJSON specification recommends limiting coordinate precision to 6
|
|
%End
|
|
|
|
void setPrecision( int precision );
|
|
%Docstring
|
|
Sets the maximum number of decimal places to use in geometry coordinates.
|
|
The RFC 7946 GeoJSON specification recommends limiting coordinate precision to 6
|
|
|
|
:param precision: number of decimal places
|
|
|
|
.. seealso:: :py:func:`precision`
|
|
%End
|
|
|
|
int precision() const;
|
|
%Docstring
|
|
Returns the maximum number of decimal places to use in geometry coordinates.
|
|
|
|
.. seealso:: :py:func:`setPrecision`
|
|
%End
|
|
|
|
void setIncludeGeometry( bool includeGeometry );
|
|
%Docstring
|
|
Sets whether to include geometry in the JSON exports.
|
|
|
|
:param includeGeometry: set to false to prevent geometry inclusion
|
|
|
|
.. seealso:: :py:func:`includeGeometry`
|
|
%End
|
|
|
|
bool includeGeometry() const;
|
|
%Docstring
|
|
Returns whether geometry will be included in the JSON exports.
|
|
|
|
.. seealso:: :py:func:`setIncludeGeometry`
|
|
%End
|
|
|
|
void setIncludeAttributes( bool includeAttributes );
|
|
%Docstring
|
|
Sets whether to include attributes in the JSON exports.
|
|
|
|
:param includeAttributes: set to false to prevent attribute inclusion
|
|
|
|
.. seealso:: :py:func:`includeAttributes`
|
|
%End
|
|
|
|
bool includeAttributes() const;
|
|
%Docstring
|
|
Returns whether attributes will be included in the JSON exports.
|
|
|
|
.. seealso:: :py:func:`setIncludeAttributes`
|
|
%End
|
|
|
|
void setIncludeRelated( bool includeRelated );
|
|
%Docstring
|
|
Sets whether to include attributes of features linked via references in the JSON exports.
|
|
|
|
:param includeRelated: set to true to include attributes for any related child features
|
|
within the exported properties element.
|
|
|
|
.. note::
|
|
|
|
associated vector layer must be set with setVectorLayer()
|
|
|
|
.. seealso:: :py:func:`includeRelated`
|
|
%End
|
|
|
|
bool includeRelated() const;
|
|
%Docstring
|
|
Returns whether attributes of related (child) features will be included in the JSON exports.
|
|
|
|
.. seealso:: :py:func:`setIncludeRelated`
|
|
%End
|
|
|
|
void setVectorLayer( QgsVectorLayer *vectorLayer );
|
|
%Docstring
|
|
Sets the associated vector layer (required for related attribute export). This will automatically
|
|
update the sourceCrs() to match.
|
|
|
|
:param vectorLayer: vector layer
|
|
|
|
.. seealso:: :py:func:`vectorLayer`
|
|
%End
|
|
|
|
QgsVectorLayer *vectorLayer() const;
|
|
%Docstring
|
|
Returns the associated vector layer, if set.
|
|
|
|
.. seealso:: :py:func:`setVectorLayer`
|
|
%End
|
|
|
|
void setSourceCrs( const QgsCoordinateReferenceSystem &crs );
|
|
%Docstring
|
|
Sets the source CRS for feature geometries. The source CRS must be set if geometries are to be
|
|
correctly automatically reprojected to WGS 84, to match GeoJSON specifications.
|
|
|
|
:param crs: source CRS for input feature geometries
|
|
|
|
.. note::
|
|
|
|
the source CRS will be overwritten when a vector layer is specified via setVectorLayer()
|
|
|
|
.. seealso:: :py:func:`sourceCrs`
|
|
%End
|
|
|
|
QgsCoordinateReferenceSystem sourceCrs() const;
|
|
%Docstring
|
|
Returns the source CRS for feature geometries. The source CRS must be set if geometries are to be
|
|
correctly automatically reprojected to WGS 84, to match GeoJSON specifications.
|
|
|
|
.. seealso:: :py:func:`setSourceCrs`
|
|
%End
|
|
|
|
void setAttributes( const QgsAttributeList &attributes );
|
|
%Docstring
|
|
Sets the list of attributes to include in the JSON exports.
|
|
|
|
:param attributes: list of attribute indexes, or an empty list to include all
|
|
attributes
|
|
|
|
.. seealso:: :py:func:`attributes`
|
|
|
|
.. seealso:: :py:func:`setExcludedAttributes`
|
|
|
|
.. note::
|
|
|
|
Attributes excluded via setExcludedAttributes() take precedence over
|
|
attributes specified by this method.
|
|
%End
|
|
|
|
QgsAttributeList attributes() const;
|
|
%Docstring
|
|
Returns the list of attributes which will be included in the JSON exports, or
|
|
an empty list if all attributes will be included.
|
|
|
|
.. seealso:: :py:func:`setAttributes`
|
|
|
|
.. seealso:: :py:func:`excludedAttributes`
|
|
|
|
.. note::
|
|
|
|
Attributes excluded via excludedAttributes() take precedence over
|
|
attributes returned by this method.
|
|
%End
|
|
|
|
void setExcludedAttributes( const QgsAttributeList &attributes );
|
|
%Docstring
|
|
Sets a list of attributes to specifically exclude from the JSON exports. Excluded attributes
|
|
take precedence over attributes included via setAttributes().
|
|
|
|
:param attributes: list of attribute indexes to exclude
|
|
|
|
.. seealso:: :py:func:`excludedAttributes`
|
|
|
|
.. seealso:: :py:func:`setAttributes`
|
|
%End
|
|
|
|
QgsAttributeList excludedAttributes() const;
|
|
%Docstring
|
|
Returns a list of attributes which will be specifically excluded from the JSON exports. Excluded attributes
|
|
take precedence over attributes included via attributes().
|
|
|
|
.. seealso:: :py:func:`setExcludedAttributes`
|
|
|
|
.. seealso:: :py:func:`attributes`
|
|
%End
|
|
|
|
QString exportFeature( const QgsFeature &feature,
|
|
const QVariantMap &extraProperties = QVariantMap(),
|
|
const QVariant &id = QVariant() ) const;
|
|
%Docstring
|
|
Returns a GeoJSON string representation of a feature.
|
|
|
|
:param feature: feature to convert
|
|
:param extraProperties: map of extra attributes to include in feature's properties
|
|
:param id: optional ID to use as GeoJSON feature's ID instead of input feature's ID. If omitted, feature's
|
|
ID is used.
|
|
|
|
:return: GeoJSON string
|
|
|
|
.. seealso:: :py:func:`exportFeatures`
|
|
%End
|
|
|
|
|
|
QString exportFeatures( const QgsFeatureList &features ) const;
|
|
%Docstring
|
|
Returns a GeoJSON string representation of a list of features (feature collection).
|
|
|
|
:param features: features to convert
|
|
|
|
:return: GeoJSON string
|
|
|
|
.. seealso:: :py:func:`exportFeature`
|
|
%End
|
|
|
|
};
|
|
|
|
|
|
class QgsJsonUtils
|
|
{
|
|
%Docstring
|
|
Helper utilities for working with JSON and GeoJSON conversions.
|
|
|
|
.. versionadded:: 2.16
|
|
%End
|
|
|
|
%TypeHeaderCode
|
|
#include "qgsjsonutils.h"
|
|
%End
|
|
public:
|
|
|
|
static QgsFeatureList stringToFeatureList( const QString &string, const QgsFields &fields, QTextCodec *encoding );
|
|
%Docstring
|
|
Attempts to parse a GeoJSON string to a collection of features.
|
|
|
|
:param string: GeoJSON string to parse
|
|
:param fields: fields collection to use for parsed features
|
|
:param encoding: text encoding
|
|
|
|
:return: list of parsed features, or an empty list if no features could be parsed
|
|
|
|
.. seealso:: :py:func:`stringToFields`
|
|
|
|
.. note::
|
|
|
|
this function is a wrapper around :py:func:`QgsOgrUtils.stringToFeatureList()`
|
|
%End
|
|
|
|
static QgsFields stringToFields( const QString &string, QTextCodec *encoding );
|
|
%Docstring
|
|
Attempts to retrieve the fields from a GeoJSON string representing a collection of features.
|
|
|
|
:param string: GeoJSON string to parse
|
|
:param encoding: text encoding
|
|
|
|
:return: retrieved fields collection, or an empty list if no fields could be determined from the string
|
|
|
|
.. seealso:: :py:func:`stringToFeatureList`
|
|
|
|
.. note::
|
|
|
|
this function is a wrapper around :py:func:`QgsOgrUtils.stringToFields()`
|
|
%End
|
|
|
|
static QString encodeValue( const QVariant &value );
|
|
%Docstring
|
|
Encodes a value to a JSON string representation, adding appropriate quotations and escaping
|
|
where required.
|
|
|
|
:param value: value to encode
|
|
|
|
:return: encoded value
|
|
%End
|
|
|
|
static QString exportAttributes( const QgsFeature &feature, QgsVectorLayer *layer = 0,
|
|
const QVector<QVariant> &attributeWidgetCaches = QVector<QVariant>() );
|
|
%Docstring
|
|
Exports all attributes from a QgsFeature as a JSON map type.
|
|
|
|
:param feature: feature to export
|
|
:param layer: optional associated vector layer. If specified, this allows
|
|
richer export utilising settings like the layer's fields widget configuration.
|
|
:param attributeWidgetCaches: optional widget configuration cache. Can be used
|
|
to speed up exporting the attributes for multiple features from the same layer.
|
|
%End
|
|
|
|
static QVariantList parseArray( const QString &json, QVariant::Type type );
|
|
%Docstring
|
|
Parse a simple array (depth=1).
|
|
|
|
:param json: the JSON to parse
|
|
:param type: the type of the elements
|
|
|
|
.. versionadded:: 3.0
|
|
%End
|
|
};
|
|
|
|
/************************************************************************
|
|
* This file has been generated automatically from *
|
|
* *
|
|
* src/core/qgsjsonutils.h *
|
|
* *
|
|
* Do not edit manually ! Edit header and run scripts/sipify.pl again *
|
|
************************************************************************/
|