QgsAbstractGeospatialPdfExporter Class Reference

Abstract base class for Geospatial PDF exporters. More...

#include <qgsabstractgeopdfexporter.h>

Inheritance diagram for QgsAbstractGeospatialPdfExporter:

Classes
struct	ComponentLayerDetail
	Contains details of a particular input component to be used during PDF composition. More...
struct	ControlPoint
	Contains details of a control point used during georeferencing Geospatial PDF outputs. More...
struct	ExportDetails
struct	GeoReferencedSection
struct	RenderedFeature
	Contains information about a feature rendered inside the PDF. More...
struct	VectorComponentDetail
	Contains information relating to a single PDF layer in the Geospatial PDF export. More...

Public Member Functions
	QgsAbstractGeospatialPdfExporter ()=default
virtual	~QgsAbstractGeospatialPdfExporter ()=default
QString	errorMessage () const
	Returns the last error message encountered during the export.
bool	finalize (const QList< QgsAbstractGeospatialPdfExporter::ComponentLayerDetail > &components, const QString &destinationFile, const ExportDetails &details)
	To be called after the rendering operation is complete.
QString	generateTemporaryFilepath (const QString &filename) const
	Returns a file path to use for temporary files required for Geospatial PDF creation.
void	pushRenderedFeature (const QString &layerId, const QgsAbstractGeospatialPdfExporter::RenderedFeature &feature, const QString &group=QString())
	Called multiple times during the rendering operation, whenever a feature associated with the specified layerId is rendered.

Static Public Member Functions
static bool	compositionModeSupported (QPainter::CompositionMode mode)
	Returns true if the specified composition mode is supported for layers during Geospatial PDF exports.
static QString	geospatialPDFAvailabilityExplanation ()
	Returns a user-friendly, translated string explaining why Geospatial PDF export support is not available on the current QGIS build (or an empty string if Geospatial PDF support IS available).
static bool	geospatialPDFCreationAvailable ()
	Returns true if the current QGIS build is capable of Geospatial PDF support.

Friends
class	TestQgsGeospatialPdfExport
class	TestQgsLayoutGeospatialPdfExport

Detailed Description

Abstract base class for Geospatial PDF exporters.

The base class handles generic Geospatial PDF export setup, cleanup and processing steps.

This class is a low level implementation detail only. Generally, you should use the high level interface exposed by classes like QgsLayoutExporter instead.

Warning

QgsAbstractGeospatialPdfExporter is designed to be a short lived object. It should be created for a single export operation only, and then immediately destroyed. Failure to correctly destroy the object after exporting a PDF will leave the application in an inconsistent, unstable state.

Note

Not available in Python bindings

Since

QGIS 3.10

Definition at line 55 of file qgsabstractgeopdfexporter.h.

Constructor & Destructor Documentation

QgsAbstractGeospatialPdfExporter()

QgsAbstractGeospatialPdfExporter::QgsAbstractGeospatialPdfExporter ( )

default

~QgsAbstractGeospatialPdfExporter()

virtual QgsAbstractGeospatialPdfExporter::~QgsAbstractGeospatialPdfExporter ( )

virtualdefault

Member Function Documentation

compositionModeSupported()

bool QgsAbstractGeospatialPdfExporter::compositionModeSupported ( QPainter::CompositionMode  mode )

static

Returns true if the specified composition mode is supported for layers during Geospatial PDF exports.

Since

QGIS 3.14

Definition at line 161 of file qgsabstractgeopdfexporter.cpp.

errorMessage()

QString QgsAbstractGeospatialPdfExporter::errorMessage ( ) const

inline

Returns the last error message encountered during the export.

Definition at line 326 of file qgsabstractgeopdfexporter.h.

finalize()

bool QgsAbstractGeospatialPdfExporter::finalize	(	const QList< QgsAbstractGeospatialPdfExporter::ComponentLayerDetail > &	components,
		const QString &	destinationFile,
		const ExportDetails &	details
	)

To be called after the rendering operation is complete.

Will export the list of PDF layer components to a new PDF file at destinationFile. The components argument gives a list of additional layers to include in the generated PDF file. These must have already been created, e.g. as a result of rendering layers to separate PDF source files.

Any features previously collected by calls to pushRenderedFeature() will be included automatically in the Geospatial PDF export.

Returns true if the operation was successful, or false if an error occurred. If an error occurred, it can be retrieved by calling errorMessage().

Definition at line 84 of file qgsabstractgeopdfexporter.cpp.

generateTemporaryFilepath()

QString QgsAbstractGeospatialPdfExporter::generateTemporaryFilepath

(

const QString &

filename

)

const

Returns a file path to use for temporary files required for Geospatial PDF creation.

Definition at line 156 of file qgsabstractgeopdfexporter.cpp.

geospatialPDFAvailabilityExplanation()

QString QgsAbstractGeospatialPdfExporter::geospatialPDFAvailabilityExplanation ( )

static

Returns a user-friendly, translated string explaining why Geospatial PDF export support is not available on the current QGIS build (or an empty string if Geospatial PDF support IS available).

See also

geospatialPDFCreationAvailable()

Definition at line 55 of file qgsabstractgeopdfexporter.cpp.

geospatialPDFCreationAvailable()

bool QgsAbstractGeospatialPdfExporter::geospatialPDFCreationAvailable ( )

static

Returns true if the current QGIS build is capable of Geospatial PDF support.

If false is returned, a user-friendly explanation why can be retrieved via geospatialPDFAvailabilityExplanation().

Definition at line 35 of file qgsabstractgeopdfexporter.cpp.

pushRenderedFeature()

void QgsAbstractGeospatialPdfExporter::pushRenderedFeature	(	const QString &	layerId,
		const QgsAbstractGeospatialPdfExporter::RenderedFeature &	feature,
		const QString &	group = QString()
	)

Called multiple times during the rendering operation, whenever a feature associated with the specified layerId is rendered.

The optional group argument can be used to differentiate features from the same layer exported multiple times as part of different layer groups.

Definition at line 186 of file qgsabstractgeopdfexporter.cpp.

Friends And Related Symbol Documentation

TestQgsGeospatialPdfExport

friend class TestQgsGeospatialPdfExport

friend

Definition at line 394 of file qgsabstractgeopdfexporter.h.

TestQgsLayoutGeospatialPdfExport

friend class TestQgsLayoutGeospatialPdfExport

friend

Definition at line 393 of file qgsabstractgeopdfexporter.h.

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

• /build/qgis-3.40.0+99sid/src/core/qgsabstractgeopdfexporter.h
• /build/qgis-3.40.0+99sid/src/core/qgsabstractgeopdfexporter.cpp