QgsStoredExpressionManager Class Reference

Manages stored expressions regarding creation, modification and storing in the project. More...

#include <qgsstoredexpressionmanager.h>

Inheritance diagram for QgsStoredExpressionManager:

Public Member Functions
	QgsStoredExpressionManager ()=default
	Constructor for QgsStoredExpressionManager. More...
QString	addStoredExpression (const QString &name, const QString &expression, const QgsStoredExpression::Category &tag=QgsStoredExpression::Category::FilterExpression)
	Adds an expression to the list. More...
void	addStoredExpressions (const QList< QgsStoredExpression > &storedExpressions)
	Appends a list of expressions to the existing list. More...
void	clearStoredExpressions ()
	Clears list of stored expressions. More...
QgsStoredExpression	findStoredExpressionByExpression (const QString &expression, const QgsStoredExpression::Category &tag=QgsStoredExpression::Category::All) const
	Returns an expression according to the expression text. More...
bool	readXml (const QDomNode &layerNode)
	Reads the stored expressions in in XML format. More...
void	removeStoredExpression (const QString &id)
	Removes an expression to the list. More...
QgsStoredExpression	storedExpression (const QString &id) const
	Returns an expression according to the id. More...
QList< QgsStoredExpression >	storedExpressions (const QgsStoredExpression::Category &tag=QgsStoredExpression::Category::All)
	Returns the list of named expressions. More...
void	updateStoredExpression (const QString &id, const QString &name, const QString &expression, const QgsStoredExpression::Category &tag)
	Updates an expression by id. More...
bool	writeXml (QDomNode &layerNode) const
	Writes the stored expressions out in XML format. More...

Detailed Description

Manages stored expressions regarding creation, modification and storing in the project.

Since

QGIS 3.10

Definition at line 93 of file qgsstoredexpressionmanager.h.

Constructor & Destructor Documentation

QgsStoredExpressionManager()

QgsStoredExpressionManager::QgsStoredExpressionManager ( )

default

Constructor for QgsStoredExpressionManager.

Member Function Documentation

addStoredExpression()

QString QgsStoredExpressionManager::addStoredExpression	(	const QString &	name,
		const QString &	expression,
		const QgsStoredExpression::Category &	tag = QgsStoredExpression::Category::FilterExpression
	)

Adds an expression to the list.

Parameters

name	optional name of the expression
expression	expression text
tag	category of the expression use case - default FilterExpression

Returns

generated id

Definition at line 24 of file qgsstoredexpressionmanager.cpp.

addStoredExpressions()

void QgsStoredExpressionManager::addStoredExpressions

(

const QList< QgsStoredExpression > &

storedExpressions

)

Appends a list of expressions to the existing list.

Parameters

storedExpressions

list of expressions and the optional name

Definition at line 67 of file qgsstoredexpressionmanager.cpp.

clearStoredExpressions()

void QgsStoredExpressionManager::clearStoredExpressions

(

)

Clears list of stored expressions.

Definition at line 110 of file qgsstoredexpressionmanager.cpp.

findStoredExpressionByExpression()

QgsStoredExpression QgsStoredExpressionManager::findStoredExpressionByExpression	(	const QString &	expression,
		const QgsStoredExpression::Category &	tag = QgsStoredExpression::Category::All
	)		const

Returns an expression according to the expression text.

Parameters

expression	id of the expression as identification
tag	category of the expression use case - default all

Definition at line 98 of file qgsstoredexpressionmanager.cpp.

readXml()

bool QgsStoredExpressionManager::readXml

(

const QDomNode &

layerNode

)

Reads the stored expressions in in XML format.

Definition at line 132 of file qgsstoredexpressionmanager.cpp.

removeStoredExpression()

void QgsStoredExpressionManager::removeStoredExpression

(

const QString &

id

)

Removes an expression to the list.

Parameters

id	id of the expression as identification

Definition at line 33 of file qgsstoredexpressionmanager.cpp.

storedExpression()

QgsStoredExpression QgsStoredExpressionManager::storedExpression

(

const QString &

id

)

const

Returns an expression according to the id.

Parameters

id	id of the expression as identification

Definition at line 86 of file qgsstoredexpressionmanager.cpp.

storedExpressions()

QList< QgsStoredExpression > QgsStoredExpressionManager::storedExpressions

(

const QgsStoredExpression::Category &

tag = QgsStoredExpression::Category::All

)

Returns the list of named expressions.

Parameters

tag	category of the expression use case - default all

Definition at line 72 of file qgsstoredexpressionmanager.cpp.

updateStoredExpression()

void QgsStoredExpressionManager::updateStoredExpression	(	const QString &	id,
		const QString &	name,
		const QString &	expression,
		const QgsStoredExpression::Category &	tag
	)

Updates an expression by id.

Parameters

id	id of the expression as identification
name	new name of the expression
expression	new expression text
tag	new category of the expression use case

Definition at line 48 of file qgsstoredexpressionmanager.cpp.

writeXml()

bool QgsStoredExpressionManager::writeXml

(

QDomNode &

layerNode

)

const

Writes the stored expressions out in XML format.

Definition at line 115 of file qgsstoredexpressionmanager.cpp.

---

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

• /build/qgis-3.18.1+99unstable/src/core/qgsstoredexpressionmanager.h
• /build/qgis-3.18.1+99unstable/src/core/qgsstoredexpressionmanager.cpp