Setting options for loading vector layers. More...

#include <qgsvectorlayer.h>

Public Member Functions
	LayerOptions (bool loadDefaultStyle=true, bool readExtentFromXml=false)
	Constructor for LayerOptions.

	LayerOptions (const QgsCoordinateTransformContext &transformContext, bool loadDefaultStyle=true, bool readExtentFromXml=false)
	Constructor for LayerOptions.

Public Attributes
QgsCoordinateReferenceSystem	fallbackCrs
	Fallback layer coordinate reference system.

Qgis::WkbType	fallbackWkbType = Qgis::WkbType::Unknown
	Fallback geometry type.

bool	forceReadOnly = false
	Controls whether the layer is forced to be load as Read Only.

bool	loadAllStoredStyles = false
	Controls whether the stored styles will be all loaded.

bool	loadDefaultStyle = true
	Set to `true` if the default layer style should be loaded.

bool	readExtentFromXml = false
	If `true`, the layer extent will be read from XML (i.e.

bool	skipCrsValidation = false
	Controls whether the layer is allowed to have an invalid/unknown CRS.

QgsCoordinateTransformContext	transformContext = QgsCoordinateTransformContext()
	Coordinate transform context.

Detailed Description

Setting options for loading vector layers.

Definition at line 423 of file qgsvectorlayer.h.

Constructor & Destructor Documentation

◆ LayerOptions() [1/2]

QgsVectorLayer::LayerOptions::LayerOptions	(	bool	loadDefaultStyle = `true`,
		bool	readExtentFromXml = `false`
	)

inlineexplicit

Constructor for LayerOptions.

Definition at line 429 of file qgsvectorlayer.h.

◆ LayerOptions() [2/2]

QgsVectorLayer::LayerOptions::LayerOptions	(	const QgsCoordinateTransformContext &	transformContext,
		bool	loadDefaultStyle = `true`,
		bool	readExtentFromXml = `false`
	)

inlineexplicit

Constructor for LayerOptions.

Since: QGIS 3.8

Definition at line 439 of file qgsvectorlayer.h.

Member Data Documentation

◆ fallbackCrs

QgsCoordinateReferenceSystem QgsVectorLayer::LayerOptions::fallbackCrs

Fallback layer coordinate reference system.

This may be set for layers where the coordinate reference system is known in advance, and where the layer path may not be initially resolvable. (E.g. layers with a URI pointing to a non-existent file). It is only ever used if the layer cannot be resolved, otherwise the actual layer CRS will be detected and used for the layer.

See also: fallbackWkbType

Since: QGIS 3.8

Definition at line 487 of file qgsvectorlayer.h.

◆ fallbackWkbType

Qgis::WkbType QgsVectorLayer::LayerOptions::fallbackWkbType = Qgis::WkbType::Unknown

Fallback geometry type.

This may be set for layers where the geometry type is known in advance, and where the layer path may not be initially resolvable. (E.g. layers with a URI pointing to a non-existent file). It is only ever used if the layer cannot be resolved, otherwise the actual layer geometry type will be detected and used for the layer.

See also: fallbackCrs

Since: QGIS 3.8

Definition at line 474 of file qgsvectorlayer.h.

◆ forceReadOnly

bool QgsVectorLayer::LayerOptions::forceReadOnly = false

Controls whether the layer is forced to be load as Read Only.

If true, then the layer's provider will only check read capabilities. Write capabilities will be skipped.

If false (the default), the layer's provider will check the edition capabilities based on user rights or file rights or others.

Since: QGIS 3.28

Definition at line 515 of file qgsvectorlayer.h.

◆ loadAllStoredStyles

bool QgsVectorLayer::LayerOptions::loadAllStoredStyles = false

Controls whether the stored styles will be all loaded.

If true and the layer's provider supports style stored in the data source all the available styles will be loaded in addition to the default one.

If false (the default), the layer's provider will only load the default style.

Since: QGIS 3.30

Definition at line 529 of file qgsvectorlayer.h.

◆ loadDefaultStyle

bool QgsVectorLayer::LayerOptions::loadDefaultStyle = true

Set to true if the default layer style should be loaded.

Definition at line 449 of file qgsvectorlayer.h.

◆ readExtentFromXml

bool QgsVectorLayer::LayerOptions::readExtentFromXml = false

If true, the layer extent will be read from XML (i.e.

stored in the project file). If false, the extent will be determined by the provider on layer load.

Definition at line 455 of file qgsvectorlayer.h.

◆ skipCrsValidation

bool QgsVectorLayer::LayerOptions::skipCrsValidation = false

Controls whether the layer is allowed to have an invalid/unknown CRS.

If true, then no validation will be performed on the layer's CRS and the layer layer's crs() may be invalid() (i.e. the layer will have no georeferencing available and will be treated as having purely numerical coordinates).

If false (the default), the layer's CRS will be validated using QgsCoordinateReferenceSystem::validate(), which may cause a blocking, user-facing dialog asking users to manually select the correct CRS for the layer.

Since: QGIS 3.10

Definition at line 502 of file qgsvectorlayer.h.

◆ transformContext

QgsCoordinateTransformContext QgsVectorLayer::LayerOptions::transformContext = QgsCoordinateTransformContext()

Coordinate transform context.

Since: QGIS 3.8

Definition at line 461 of file qgsvectorlayer.h.

The documentation for this struct was generated from the following file:

/build/qgis-3.40.0+99sid/src/core/vector/qgsvectorlayer.h

Public Member Functions

Public Attributes