QgsAbstractMeshLayerLabeling Class Reference

Abstract base class - its implementations define different approaches to the labeling of a mesh layer. More...

#include <qgsmeshlayerlabeling.h>

Inheritance diagram for QgsAbstractMeshLayerLabeling:

Public Member Functions
	QgsAbstractMeshLayerLabeling ()=default
virtual	~QgsAbstractMeshLayerLabeling ()=default
virtual bool	accept (QgsStyleEntityVisitorInterface *visitor) const
	Accepts the specified symbology visitor, causing it to visit all symbols associated with the labeling.
virtual QgsAbstractMeshLayerLabeling *	clone () const =0
	Returns a new copy of the object.
virtual void	multiplyOpacity (double opacityFactor)
	Multiply opacity by opacityFactor.
virtual QgsMeshLayerLabelProvider *	provider (QgsMeshLayer *layer) const
	Factory for label provider implementation.
virtual bool	requiresAdvancedEffects () const =0
	Returns true if drawing labels requires advanced effects like composition modes, which could prevent it being used as an isolated cached image or exported to a vector format.
virtual QDomElement	save (QDomDocument &doc, const QgsReadWriteContext &context) const =0
	Returns labeling configuration as XML element.
virtual void	setSettings (QgsPalLayerSettings *settings, const QString &providerId=QString())=0
	Set pal settings for a specific provider (takes ownership).
virtual QgsPalLayerSettings	settings (const QString &providerId=QString()) const =0
	Gets associated label settings.
virtual QStringList	subProviders () const
	Gets list of sub-providers within the layer's labeling.
virtual void	toSld (QDomNode &parent, const QVariantMap &props) const
	Writes the SE 1.1 TextSymbolizer element based on the current layer labeling settings.
virtual QString	type () const =0
	Unique type string of the labeling configuration implementation.

Static Public Member Functions
static QgsAbstractMeshLayerLabeling *	create (const QDomElement &element, const QgsReadWriteContext &context)
	Try to create instance of an implementation based on the XML data.
static QgsPalLayerSettings	defaultSettingsForLayer (const QgsMeshLayer *layer)
	Returns the default layer settings to use for the specified mesh layer.

Detailed Description

Abstract base class - its implementations define different approaches to the labeling of a mesh layer.

Since

QGIS 3.36

Definition at line 44 of file qgsmeshlayerlabeling.h.

Constructor & Destructor Documentation

QgsAbstractMeshLayerLabeling()

QgsAbstractMeshLayerLabeling::QgsAbstractMeshLayerLabeling ( )

default

~QgsAbstractMeshLayerLabeling()

virtual QgsAbstractMeshLayerLabeling::~QgsAbstractMeshLayerLabeling ( )

virtualdefault

Member Function Documentation

accept()

bool QgsAbstractMeshLayerLabeling::accept ( QgsStyleEntityVisitorInterface *  visitor ) const

virtual

Accepts the specified symbology visitor, causing it to visit all symbols associated with the labeling.

Returns true if the visitor should continue visiting other objects, or false if visiting should be canceled.

Reimplemented in QgsMeshLayerSimpleLabeling.

Definition at line 38 of file qgsmeshlayerlabeling.cpp.

clone()

virtual QgsAbstractMeshLayerLabeling * QgsAbstractMeshLayerLabeling::clone ( ) const

pure virtual

Returns a new copy of the object.

Implemented in QgsMeshLayerSimpleLabeling.

create()

QgsAbstractMeshLayerLabeling * QgsAbstractMeshLayerLabeling::create ( const QDomElement &  element, const QgsReadWriteContext &  context  )

static

Try to create instance of an implementation based on the XML data.

Definition at line 25 of file qgsmeshlayerlabeling.cpp.

defaultSettingsForLayer()

QgsPalLayerSettings QgsAbstractMeshLayerLabeling::defaultSettingsForLayer ( const QgsMeshLayer *  layer )

static

Returns the default layer settings to use for the specified mesh layer.

Definition at line 43 of file qgsmeshlayerlabeling.cpp.

multiplyOpacity()

virtual void QgsAbstractMeshLayerLabeling::multiplyOpacity ( double  opacityFactor )

inlinevirtual

Multiply opacity by opacityFactor.

This method multiplies the opacity of the labeling elements (text, shadow, buffer etc.) by opacity effectively changing the opacity of the whole labeling elements.

Reimplemented in QgsMeshLayerSimpleLabeling.

Definition at line 96 of file qgsmeshlayerlabeling.h.

provider()

virtual QgsMeshLayerLabelProvider * QgsAbstractMeshLayerLabeling::provider ( QgsMeshLayer *  layer ) const

inlinevirtual

Factory for label provider implementation.

Note

not available in Python bindings

Reimplemented in QgsMeshLayerSimpleLabeling.

Definition at line 61 of file qgsmeshlayerlabeling.h.

requiresAdvancedEffects()

virtual bool QgsAbstractMeshLayerLabeling::requiresAdvancedEffects ( ) const

pure virtual

Returns true if drawing labels requires advanced effects like composition modes, which could prevent it being used as an isolated cached image or exported to a vector format.

Implemented in QgsMeshLayerSimpleLabeling.

save()

virtual QDomElement QgsAbstractMeshLayerLabeling::save ( QDomDocument &  doc, const QgsReadWriteContext &  context  ) const

pure virtual

Returns labeling configuration as XML element.

Implemented in QgsMeshLayerSimpleLabeling.

setSettings()

virtual void QgsAbstractMeshLayerLabeling::setSettings ( QgsPalLayerSettings *  settings, const QString &  providerId = QString()  )

pure virtual

Set pal settings for a specific provider (takes ownership).

Parameters

settings	Pal layer settings
providerId	The id of the provider

Implemented in QgsMeshLayerSimpleLabeling.

settings()

virtual QgsPalLayerSettings QgsAbstractMeshLayerLabeling::settings ( const QString &  providerId = QString() ) const

pure virtual

Gets associated label settings.

In case of multiple sub-providers with different settings, they are identified by their ID.

Implemented in QgsMeshLayerSimpleLabeling.

subProviders()

virtual QStringList QgsAbstractMeshLayerLabeling::subProviders ( ) const

inlinevirtual

Gets list of sub-providers within the layer's labeling.

Definition at line 67 of file qgsmeshlayerlabeling.h.

toSld()

virtual void QgsAbstractMeshLayerLabeling::toSld ( QDomNode &  parent, const QVariantMap &  props  ) const

inlinevirtual

Writes the SE 1.1 TextSymbolizer element based on the current layer labeling settings.

Definition at line 107 of file qgsmeshlayerlabeling.h.

type()

virtual QString QgsAbstractMeshLayerLabeling::type ( ) const

pure virtual

Unique type string of the labeling configuration implementation.

Implemented in QgsMeshLayerSimpleLabeling.

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

• /build/qgis-3.41.0+git20241119+45a0abf3bec+99sid/src/core/mesh/qgsmeshlayerlabeling.h
• /build/qgis-3.41.0+git20241119+45a0abf3bec+99sid/src/core/mesh/qgsmeshlayerlabeling.cpp