Assorted functions for dealing with layer trees. More...

#include <qgslayertreeutils.h>

Static Public Member Functions
static Qt::CheckState	checkStateFromXml (const QString &txt)
	Convert QString to Qt::CheckState. More...

static QString	checkStateToXml (Qt::CheckState state)
	Convert Qt::CheckState to QString. More...

static bool	hasLegendFilterExpression (const QgsLayerTreeGroup &group)
	Test if one of the layers in a group has an expression filter. More...

static QgsLayerTreeLayer *	insertLayerBelow (QgsLayerTreeGroup group, const QgsMapLayer refLayer, QgsMapLayer *layerToInsert)
	Insert a QgsMapLayer just below another one. More...

static QStringList	invisibleLayerList (QgsLayerTreeNode *node)
	get invisible layers More...

static bool	layersEditable (const QList< QgsLayerTreeLayer *> &layerNodes)
	Return true if any of the layers is editable. More...

static bool	layersModified (const QList< QgsLayerTreeLayer *> &layerNodes)
	Return true if any of the layers is modified. More...

static QString	legendFilterByExpression (const QgsLayerTreeLayer &layer, bool *enabled=nullptr)
	Return the expression filter of a legend layer. More...

static bool	readOldLegend (QgsLayerTreeGroup *root, const QDomElement &legendElem)
	Try to load layer tree from. More...

static bool	readOldLegendLayerOrder (const QDomElement &legendElem, bool &hasCustomOrder, QStringList &order)
	Try to load custom layer order from. More...

static void	removeInvalidLayers (QgsLayerTreeGroup *group)
	Remove layer nodes that refer to invalid layers. More...

static void	replaceChildrenOfEmbeddedGroups (QgsLayerTreeGroup *group)
	Remove subtree of embedded groups and replaces it with a custom property embedded-visible-layers. More...

static void	setLegendFilterByExpression (QgsLayerTreeLayer &layer, const QString &expr, bool enabled=true)
	Set the expression filter of a legend layer. More...

static void	updateEmbeddedGroupsProjectPath (QgsLayerTreeGroup *group)

static QDomElement	writeOldLegend (QDomDocument &doc, QgsLayerTreeGroup *root, bool hasCustomOrder, const QStringList &order)
	Return. More...

Detailed Description

Assorted functions for dealing with layer trees.

Note: added in 2.4

Definition at line 37 of file qgslayertreeutils.h.

Member Function Documentation

◆ checkStateFromXml()

Qt::CheckState QgsLayerTreeUtils::checkStateFromXml ( const QString & txt )

static

Convert QString to Qt::CheckState.

Definition at line 197 of file qgslayertreeutils.cpp.

◆ checkStateToXml()

QString QgsLayerTreeUtils::checkStateToXml ( Qt::CheckState state )

static

Convert Qt::CheckState to QString.

Definition at line 183 of file qgslayertreeutils.cpp.

◆ hasLegendFilterExpression()

bool QgsLayerTreeUtils::hasLegendFilterExpression ( const QgsLayerTreeGroup & group )

static

Test if one of the layers in a group has an expression filter.

Definition at line 384 of file qgslayertreeutils.cpp.

◆ insertLayerBelow()

QgsLayerTreeLayer * QgsLayerTreeUtils::insertLayerBelow	(	QgsLayerTreeGroup *	group,
		const QgsMapLayer *	refLayer,
		QgsMapLayer *	layerToInsert
	)

static

Insert a QgsMapLayer just below another one.

Parameters

group	the tree group where layers are (can be the root group)
refLayer	the reference layer
layerToInsert	the new layer to insert just below the reference layer

Returns: the new tree layer

Definition at line 398 of file qgslayertreeutils.cpp.

◆ invisibleLayerList()

QStringList QgsLayerTreeUtils::invisibleLayerList ( QgsLayerTreeNode * node )

static

get invisible layers

Definition at line 311 of file qgslayertreeutils.cpp.

◆ layersEditable()

bool QgsLayerTreeUtils::layersEditable ( const QList< QgsLayerTreeLayer *> & layerNodes )

static

Return true if any of the layers is editable.

Definition at line 265 of file qgslayertreeutils.cpp.

◆ layersModified()

bool QgsLayerTreeUtils::layersModified ( const QList< QgsLayerTreeLayer *> & layerNodes )

static

Return true if any of the layers is modified.

Definition at line 279 of file qgslayertreeutils.cpp.

◆ legendFilterByExpression()

QString QgsLayerTreeUtils::legendFilterByExpression	(	const QgsLayerTreeLayer &	layer,
		bool *	enabled = `nullptr`
	)

static

Return the expression filter of a legend layer.

Definition at line 377 of file qgslayertreeutils.cpp.

◆ readOldLegend()

bool QgsLayerTreeUtils::readOldLegend	(	QgsLayerTreeGroup *	root,
		const QDomElement &	legendElem
	)

static

Try to load layer tree from.

<legend>

tag from project files from QGIS 2.2 and below

Definition at line 30 of file qgslayertreeutils.cpp.

◆ readOldLegendLayerOrder()

bool QgsLayerTreeUtils::readOldLegendLayerOrder	(	const QDomElement &	legendElem,
		bool &	hasCustomOrder,
		QStringList &	order
	)

static

Try to load custom layer order from.

<legend>

tag from project files from QGIS 2.2 and below

Definition at line 82 of file qgslayertreeutils.cpp.

◆ removeInvalidLayers()

void QgsLayerTreeUtils::removeInvalidLayers ( QgsLayerTreeGroup * group )

static

Remove layer nodes that refer to invalid layers.

Definition at line 293 of file qgslayertreeutils.cpp.

◆ replaceChildrenOfEmbeddedGroups()

void QgsLayerTreeUtils::replaceChildrenOfEmbeddedGroups ( QgsLayerTreeGroup * group )

static

Remove subtree of embedded groups and replaces it with a custom property embedded-visible-layers.

Definition at line 333 of file qgslayertreeutils.cpp.

◆ setLegendFilterByExpression()

void QgsLayerTreeUtils::setLegendFilterByExpression	(	QgsLayerTreeLayer &	layer,
		const QString &	expr,
		bool	enabled = `true`
	)

static

Set the expression filter of a legend layer.

Definition at line 371 of file qgslayertreeutils.cpp.

◆ updateEmbeddedGroupsProjectPath()

void QgsLayerTreeUtils::updateEmbeddedGroupsProjectPath ( QgsLayerTreeGroup * group )

static

Note: not available in python bindings

Definition at line 353 of file qgslayertreeutils.cpp.

◆ writeOldLegend()

QDomElement QgsLayerTreeUtils::writeOldLegend	(	QDomDocument &	doc,
		QgsLayerTreeGroup *	root,
		bool	hasCustomOrder,
		const QStringList &	order
	)

static

Return.

<legend>

tag used in QGIS 2.2 and below

Definition at line 172 of file qgslayertreeutils.cpp.

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

/tmp/buildd/qgis-2.18.21+99unstable/src/core/layertree/qgslayertreeutils.h
/tmp/buildd/qgis-2.18.21+99unstable/src/core/layertree/qgslayertreeutils.cpp

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ checkStateFromXml()

◆ checkStateToXml()

◆ hasLegendFilterExpression()

◆ insertLayerBelow()

◆ invisibleLayerList()

◆ layersEditable()

◆ layersModified()

◆ legendFilterByExpression()

◆ readOldLegend()

◆ readOldLegendLayerOrder()

◆ removeInvalidLayers()

◆ replaceChildrenOfEmbeddedGroups()

◆ setLegendFilterByExpression()

◆ updateEmbeddedGroupsProjectPath()

◆ writeOldLegend()