QgsSettingsEntryBase Class Reference

Represents a settings entry and provides methods for reading and writing settings values. More...

#include <qgssettingsentry.h>

Inheritance diagram for QgsSettingsEntryBase:

Public Member Functions
	QgsSettingsEntryBase (const QString &key, const QString &section, const QVariant &defaultValue=QVariant(), const QString &description=QString(), Qgis::SettingsOptions options=Qgis::SettingsOptions())
	Constructor for QgsSettingsEntryBase.
	QgsSettingsEntryBase (const QString &name, QgsSettingsTreeNode *parent, const QVariant &defaultValue=QVariant(), const QString &description=QString(), Qgis::SettingsOptions options=Qgis::SettingsOptions())
	Constructor for QgsSettingsEntryBase.
virtual	~QgsSettingsEntryBase ()
virtual bool	checkValueVariant (const QVariant &value) const
	Returns true if the given value is valid towards the setting definition.
bool	copyValueFromKey (const QString &key, bool removeSettingAtKey=false) const
	Copies the value from a given key if it exists.
bool	copyValueFromKey (const QString &key, const QStringList &dynamicKeyPartList, bool removeSettingAtKey=false) const
	Copies the value from a given key if it exists.
void	copyValueToKey (const QString &key, const QStringList &dynamicKeyPartList=QStringList()) const
	Copies the settings to the given key.
void	copyValueToKeyIfChanged (const QString &key, const QStringList &dynamicKeyPartList=QStringList()) const
	Copies the settings to the given key, if it has changed during the current QGIS session (see hasChanged()).
QVariant	defaultValueAsVariant () const
	Returns settings default value.
QString	definitionKey () const
	Returns settings entry defining key.
QString	description () const
	Returns the settings entry description.
bool	exists (const QString &dynamicKeyPart=QString()) const
	Returns true if the settings is contained in the underlying QSettings.
bool	exists (const QStringList &dynamicKeyPartList) const
	Returns true if the settings is contained in the underlying QSettings.
QVariant	formerValueAsVariant (const QString &dynamicKeyPart) const
	Returns the former value of the settings if it has been enabled in the options.
QVariant	formerValueAsVariant (const QStringList &dynamicKeyPartList) const
	Returns the former value of the settings if it has been enabled in the options Returns the current value (or default) if there is no former value.
bool	hasChanged () const
	Returns true if the setting was changed during the current QGIS session.
bool	hasDynamicKey () const
	Returns true if a part of the settings key is built dynamically.
QString	key (const QString &dynamicKeyPart=QString()) const
	Returns settings entry key.
QString	key (const QStringList &dynamicKeyPartList) const
	Returns settings entry key.
bool	keyIsValid (const QString &key) const
	Returns true if the provided key match the settings entry.
QString	name () const
	Returns the name of the settings.
Qgis::SettingsOptions	options () const
	Returns the settings options.
Qgis::SettingsOrigin	origin (const QStringList &dynamicKeyPartList) const
	Returns the origin of the setting if it exists.
QgsSettingsTreeNode *	parent () const
	Returns the parent tree element.
void	remove (const QString &dynamicKeyPart=QString()) const
	Removes the settings from the underlying QSettings.
void	remove (const QStringList &dynamicKeyPartList) const
	Removes the settings from the underlying QSettings.
Q_DECL_DEPRECATED int	section () const
	Returns settings section.
virtual Qgis::SettingsType	settingsType () const
	Returns the settings entry type.
bool	setVariantValue (const QVariant &value, const QString &dynamicKeyPart=QString()) const
	Set settings value.
bool	setVariantValue (const QVariant &value, const QStringList &dynamicKeyPartList) const
	Set settings value.
virtual QString	typeId () const
	Returns the id of the type of settings This can be re-implemented in a custom implementation of a setting.
Q_DECL_DEPRECATED QVariant	valueAsVariant (const QString &dynamicKeyPart, bool useDefaultValueOverride, const QVariant &defaultValueOverride) const
	Returns settings value with an optional default value override.
QVariant	valueAsVariant (const QString &dynamicKeyPart=QString()) const
	Returns settings value with.
QVariant	valueAsVariant (const QStringList &dynamicKeyPartList) const
	Returns settings value with.
Q_DECL_DEPRECATED QVariant	valueAsVariant (const QStringList &dynamicKeyPartList, bool useDefaultValueOverride, const QVariant &defaultValueOverride) const
	Returns settings value with an optional default value override.
QVariant	valueAsVariantWithDefaultOverride (const QVariant &defaultValueOverride, const QString &dynamicKeyPart=QString()) const
	Returns settings value with a defaultValueOverride.
QVariant	valueAsVariantWithDefaultOverride (const QVariant &defaultValueOverride, const QStringList &dynamicKeyPartList) const
	Returns settings value.

Static Public Member Functions
static QStringList	dynamicKeyPartToList (const QString &dynamicKeyPart)
	Transforms a dynamic key part string to list.

Detailed Description

Represents a settings entry and provides methods for reading and writing settings values.

Different subclasses are provided for different settings types with metainformations to validate set values and provide more accurate settings description for the gui.

Since

QGIS 3.20

Definition at line 45 of file qgssettingsentry.h.

Constructor & Destructor Documentation

QgsSettingsEntryBase() [1/2]

QgsSettingsEntryBase::QgsSettingsEntryBase ( const QString &  key, const QString &  section, const QVariant &  defaultValue = QVariant(), const QString &  description = QString(), Qgis::SettingsOptions  options = Qgis::SettingsOptions()  )

inline

Constructor for QgsSettingsEntryBase.

Parameters

key	specifies the key of the settings.
section	specifies the section.
defaultValue	specifies the default value for the settings entry.
description	specifies a description for the settings entry.
options	specifies the options for the settings entry.

Definition at line 90 of file qgssettingsentry.h.

QgsSettingsEntryBase() [2/2]

QgsSettingsEntryBase::QgsSettingsEntryBase	(	const QString &	name,
		QgsSettingsTreeNode *	parent,
		const QVariant &	defaultValue = QVariant(),
		const QString &	description = QString(),
		Qgis::SettingsOptions	options = Qgis::SettingsOptions()
	)

Constructor for QgsSettingsEntryBase.

Parameters

name	specifies the name of the setting.
parent	specifies the parent in the tree of settings.
defaultValue	specifies the default value for the settings entry.
description	specifies a description for the settings entry.
options	specifies the options for the settings entry.

Exceptions

QgsSettingsException

if the number of given parent named items doesn't match the complete key definition

Since

QGIS 3.30

Definition at line 26 of file qgssettingsentry.cpp.

~QgsSettingsEntryBase()

QgsSettingsEntryBase::~QgsSettingsEntryBase ( )

virtual

Definition at line 41 of file qgssettingsentry.cpp.

Member Function Documentation

checkValueVariant()

virtual bool QgsSettingsEntryBase::checkValueVariant ( const QVariant &  value ) const

inlinevirtual

Returns true if the given value is valid towards the setting definition.

Reimplemented in QgsSettingsEntryBaseTemplate< T >, QgsSettingsEntryBaseTemplate< bool >, QgsSettingsEntryBaseTemplate< double >, QgsSettingsEntryBaseTemplate< ENUM >, QgsSettingsEntryBaseTemplate< FLAGS >, QgsSettingsEntryBaseTemplate< int >, QgsSettingsEntryBaseTemplate< QColor >, QgsSettingsEntryBaseTemplate< Qgis::DpiMode >, QgsSettingsEntryBaseTemplate< Qgis::EndCapStyle >, QgsSettingsEntryBaseTemplate< Qgis::GpsConnectionType >, QgsSettingsEntryBaseTemplate< Qgis::GpsInformationComponent >, QgsSettingsEntryBaseTemplate< Qgis::HttpMethod >, QgsSettingsEntryBaseTemplate< Qgis::JoinStyle >, QgsSettingsEntryBaseTemplate< Qgis::MapToolUnit >, QgsSettingsEntryBaseTemplate< Qgis::SnappingMode >, QgsSettingsEntryBaseTemplate< Qgis::SnappingType >, QgsSettingsEntryBaseTemplate< Qgis::TilePixelRatio >, QgsSettingsEntryBaseTemplate< Qgis::VectorRenderingSimplificationFlags >, QgsSettingsEntryBaseTemplate< Qgis::VectorSimplificationAlgorithm >, QgsSettingsEntryBaseTemplate< qlonglong >, QgsSettingsEntryBaseTemplate< QString >, QgsSettingsEntryBaseTemplate< QStringList >, QgsSettingsEntryBaseTemplate< Qt::TimeSpec >, QgsSettingsEntryBaseTemplate< QVariant >, and QgsSettingsEntryBaseTemplate< QVariantMap >.

Definition at line 343 of file qgssettingsentry.h.

copyValueFromKey() [1/2]

bool QgsSettingsEntryBase::copyValueFromKey ( const QString &  key, bool  removeSettingAtKey = false  ) const

inline

Copies the value from a given key if it exists.

Parameters

key	the key to copy the setting value from.
removeSettingAtKey	if true, the setting at the old key will be removed.

Returns

true if the key exists and the setting value could be copied.

Since

QGIS 3.30

Definition at line 306 of file qgssettingsentry.h.

copyValueFromKey() [2/2]

bool QgsSettingsEntryBase::copyValueFromKey	(	const QString &	key,
		const QStringList &	dynamicKeyPartList,
		bool	removeSettingAtKey = false
	)		const

Copies the value from a given key if it exists.

Parameters

key	the key to copy the setting value from.
dynamicKeyPartList	is the optional dynamic key part to determine the key. It must be the same for origin and destination keys.
removeSettingAtKey	if true, the setting at the old key will be removed.

Returns

true if the key exists and the setting value could be copied.

Since

QGIS 3.30

Definition at line 236 of file qgssettingsentry.cpp.

copyValueToKey()

void QgsSettingsEntryBase::copyValueToKey	(	const QString &	key,
		const QStringList &	dynamicKeyPartList = QStringList()
	)		const

Copies the settings to the given key.

Parameters

key	the key to copy the setting value to.
dynamicKeyPartList	is the optional dynamic key part to determine the key. It must be the same for origin and destination keys.

Since

QGIS 3.30

Definition at line 259 of file qgssettingsentry.cpp.

copyValueToKeyIfChanged()

void QgsSettingsEntryBase::copyValueToKeyIfChanged	(	const QString &	key,
		const QStringList &	dynamicKeyPartList = QStringList()
	)		const

Copies the settings to the given key, if it has changed during the current QGIS session (see hasChanged()).

Parameters

key	the key to copy the setting value to.
dynamicKeyPartList	is the optional dynamic key part to determine the key. It must be the same for origin and destination keys.

Since

QGIS 3.36

Definition at line 265 of file qgssettingsentry.cpp.

defaultValueAsVariant()

QVariant QgsSettingsEntryBase::defaultValueAsVariant

(

)

const

Returns settings default value.

Definition at line 214 of file qgssettingsentry.cpp.

definitionKey()

QString QgsSettingsEntryBase::definitionKey

(

)

const

Returns settings entry defining key.

For dynamic settings it return the key with the placeholder for dynamic part included. For non-dynamic settings returns the same as key().

Definition at line 106 of file qgssettingsentry.cpp.

description()

QString QgsSettingsEntryBase::description

(

)

const

Returns the settings entry description.

Definition at line 219 of file qgssettingsentry.cpp.

dynamicKeyPartToList()

QStringList QgsSettingsEntryBase::dynamicKeyPartToList ( const QString &  dynamicKeyPart )

static

Transforms a dynamic key part string to list.

Since

QGIS 3.26

Definition at line 171 of file qgssettingsentry.cpp.

exists() [1/2]

bool QgsSettingsEntryBase::exists

(

const QString &

dynamicKeyPart = QString()

)

const

Returns true if the settings is contained in the underlying QSettings.

Parameters

dynamicKeyPart

specifies the dynamic part of the settings key.

Definition at line 117 of file qgssettingsentry.cpp.

exists() [2/2]

bool QgsSettingsEntryBase::exists

(

const QStringList &

dynamicKeyPartList

)

const

Returns true if the settings is contained in the underlying QSettings.

Parameters

dynamicKeyPartList

specifies the list of dynamic parts of the settings key.

Definition at line 122 of file qgssettingsentry.cpp.

formerValueAsVariant() [1/2]

QVariant QgsSettingsEntryBase::formerValueAsVariant

(

const QString &

dynamicKeyPart

)

const

Returns the former value of the settings if it has been enabled in the options.

Returns the current value (or default) if there is no former value.

Since

QGIS 3.26

Definition at line 224 of file qgssettingsentry.cpp.

formerValueAsVariant() [2/2]

QVariant QgsSettingsEntryBase::formerValueAsVariant

(

const QStringList &

dynamicKeyPartList

)

const

Returns the former value of the settings if it has been enabled in the options Returns the current value (or default) if there is no former value.

Since

QGIS 3.26

Definition at line 229 of file qgssettingsentry.cpp.

hasChanged()

bool QgsSettingsEntryBase::hasChanged ( ) const

inline

Returns true if the setting was changed during the current QGIS session.

Since

QGIS 3.36

Definition at line 354 of file qgssettingsentry.h.

hasDynamicKey()

bool QgsSettingsEntryBase::hasDynamicKey

(

)

const

Returns true if a part of the settings key is built dynamically.

Definition at line 111 of file qgssettingsentry.cpp.

key() [1/2]

QString QgsSettingsEntryBase::key

(

const QString &

dynamicKeyPart = QString()

)

const

Returns settings entry key.

Parameters

dynamicKeyPart

specifies the dynamic part of the settings key.

Definition at line 53 of file qgssettingsentry.cpp.

key() [2/2]

QString QgsSettingsEntryBase::key

(

const QStringList &

dynamicKeyPartList

)

const

Returns settings entry key.

Parameters

dynamicKeyPartList

specifies the list of dynamic parts of the settings key.

Definition at line 58 of file qgssettingsentry.cpp.

keyIsValid()

bool QgsSettingsEntryBase::keyIsValid

(

const QString &

key

)

const

Returns true if the provided key match the settings entry.

This is useful for settings with dynamic keys. For example this permits one to check that the settings key "NewsFeed/httpsfeedqgisorg/27/content" is valid for the settings entry defined with the key "NewsFeed/%1/%2/content"

Parameters

key

to check

Definition at line 90 of file qgssettingsentry.cpp.

name()

QString QgsSettingsEntryBase::name ( ) const

inline

Returns the name of the settings.

Since

QGIS 3.30

Definition at line 133 of file qgssettingsentry.h.

options()

Qgis::SettingsOptions QgsSettingsEntryBase::options ( ) const

inline

Returns the settings options.

Since

QGIS 3.26

Definition at line 176 of file qgssettingsentry.h.

origin()

Qgis::SettingsOrigin QgsSettingsEntryBase::origin

(

const QStringList &

dynamicKeyPartList

)

const

Returns the origin of the setting if it exists.

Note

it will return Qgis::SettingsOrigin::Any if the key doesn't exist

Since

QGIS 3.30

Definition at line 127 of file qgssettingsentry.cpp.

parent()

QgsSettingsTreeNode * QgsSettingsEntryBase::parent ( ) const

inline

Returns the parent tree element.

Since

QGIS 3.30

Definition at line 340 of file qgssettingsentry.h.

remove() [1/2]

void QgsSettingsEntryBase::remove

(

const QString &

dynamicKeyPart = QString()

)

const

Removes the settings from the underlying QSettings.

Parameters

dynamicKeyPart

specifies the dynamic part of the settings key.

Definition at line 132 of file qgssettingsentry.cpp.

remove() [2/2]

void QgsSettingsEntryBase::remove

(

const QStringList &

dynamicKeyPartList

)

const

Removes the settings from the underlying QSettings.

Parameters

dynamicKeyPartList

specifies the list of dynamic parts of the settings key.

Definition at line 137 of file qgssettingsentry.cpp.

section()

int QgsSettingsEntryBase::section

(

)

const

Returns settings section.

The settings section of the parent group is returned if available.

Deprecated:

QGIS 3.26. The key is entirely self-defined.

Definition at line 142 of file qgssettingsentry.cpp.

settingsType()

virtual Qgis::SettingsType QgsSettingsEntryBase::settingsType ( ) const

inlinevirtual

Returns the settings entry type.

Reimplemented in QgsSettingsEntryEnumFlag< T >, QgsSettingsEntryEnumFlag< ENUM >, QgsSettingsEntryEnumFlag< FLAGS >, QgsSettingsEntryEnumFlag< Qgis::DpiMode >, QgsSettingsEntryEnumFlag< Qgis::EndCapStyle >, QgsSettingsEntryEnumFlag< Qgis::GpsConnectionType >, QgsSettingsEntryEnumFlag< Qgis::GpsInformationComponent >, QgsSettingsEntryEnumFlag< Qgis::HttpMethod >, QgsSettingsEntryEnumFlag< Qgis::JoinStyle >, QgsSettingsEntryEnumFlag< Qgis::MapToolUnit >, QgsSettingsEntryEnumFlag< Qgis::SnappingMode >, QgsSettingsEntryEnumFlag< Qgis::SnappingType >, QgsSettingsEntryEnumFlag< Qgis::TilePixelRatio >, QgsSettingsEntryEnumFlag< Qgis::VectorRenderingSimplificationFlags >, QgsSettingsEntryEnumFlag< Qgis::VectorSimplificationAlgorithm >, QgsSettingsEntryEnumFlag< Qt::TimeSpec >, QgsSettingsEntryVariant, QgsSettingsEntryString, QgsSettingsEntryStringList, QgsSettingsEntryBool, QgsSettingsEntryInteger, QgsSettingsEntryInteger64, QgsSettingsEntryDouble, QgsSettingsEntryColor, QgsSettingsEntryVariantMap, QgsSettingsEntryBaseTemplate< T >, QgsSettingsEntryBaseTemplate< bool >, QgsSettingsEntryBaseTemplate< double >, QgsSettingsEntryBaseTemplate< ENUM >, QgsSettingsEntryBaseTemplate< FLAGS >, QgsSettingsEntryBaseTemplate< int >, QgsSettingsEntryBaseTemplate< QColor >, QgsSettingsEntryBaseTemplate< Qgis::DpiMode >, QgsSettingsEntryBaseTemplate< Qgis::EndCapStyle >, QgsSettingsEntryBaseTemplate< Qgis::GpsConnectionType >, QgsSettingsEntryBaseTemplate< Qgis::GpsInformationComponent >, QgsSettingsEntryBaseTemplate< Qgis::HttpMethod >, QgsSettingsEntryBaseTemplate< Qgis::JoinStyle >, QgsSettingsEntryBaseTemplate< Qgis::MapToolUnit >, QgsSettingsEntryBaseTemplate< Qgis::SnappingMode >, QgsSettingsEntryBaseTemplate< Qgis::SnappingType >, QgsSettingsEntryBaseTemplate< Qgis::TilePixelRatio >, QgsSettingsEntryBaseTemplate< Qgis::VectorRenderingSimplificationFlags >, QgsSettingsEntryBaseTemplate< Qgis::VectorSimplificationAlgorithm >, QgsSettingsEntryBaseTemplate< qlonglong >, QgsSettingsEntryBaseTemplate< QString >, QgsSettingsEntryBaseTemplate< QStringList >, QgsSettingsEntryBaseTemplate< Qt::TimeSpec >, QgsSettingsEntryBaseTemplate< QVariant >, and QgsSettingsEntryBaseTemplate< QVariantMap >.

Definition at line 277 of file qgssettingsentry.h.

setVariantValue() [1/2]

bool QgsSettingsEntryBase::setVariantValue	(	const QVariant &	value,
		const QString &	dynamicKeyPart = QString()
	)		const

Set settings value.

Parameters

value	specifies the value to set.
dynamicKeyPart	specifies the dynamic part of the settings key.

Definition at line 147 of file qgssettingsentry.cpp.

setVariantValue() [2/2]

bool QgsSettingsEntryBase::setVariantValue	(	const QVariant &	value,
		const QStringList &	dynamicKeyPartList
	)		const

Set settings value.

This should be called from any implementation as it takes care of actually calling QSettings

Parameters

value	specifies the value to set.
dynamicKeyPartList	specifies the list of dynamic parts of the settings key.

Definition at line 152 of file qgssettingsentry.cpp.

typeId()

QString QgsSettingsEntryBase::typeId ( ) const

virtual

Returns the id of the type of settings This can be re-implemented in a custom implementation of a setting.

Since

QGIS 3.32

Reimplemented in QgsSettingsEntryEnumFlag< T >, QgsSettingsEntryEnumFlag< ENUM >, QgsSettingsEntryEnumFlag< FLAGS >, QgsSettingsEntryEnumFlag< Qgis::DpiMode >, QgsSettingsEntryEnumFlag< Qgis::EndCapStyle >, QgsSettingsEntryEnumFlag< Qgis::GpsConnectionType >, QgsSettingsEntryEnumFlag< Qgis::GpsInformationComponent >, QgsSettingsEntryEnumFlag< Qgis::HttpMethod >, QgsSettingsEntryEnumFlag< Qgis::JoinStyle >, QgsSettingsEntryEnumFlag< Qgis::MapToolUnit >, QgsSettingsEntryEnumFlag< Qgis::SnappingMode >, QgsSettingsEntryEnumFlag< Qgis::SnappingType >, QgsSettingsEntryEnumFlag< Qgis::TilePixelRatio >, QgsSettingsEntryEnumFlag< Qgis::VectorRenderingSimplificationFlags >, QgsSettingsEntryEnumFlag< Qgis::VectorSimplificationAlgorithm >, and QgsSettingsEntryEnumFlag< Qt::TimeSpec >.

Definition at line 47 of file qgssettingsentry.cpp.

valueAsVariant() [1/4]

QVariant QgsSettingsEntryBase::valueAsVariant	(	const QString &	dynamicKeyPart,
		bool	useDefaultValueOverride,
		const QVariant &	defaultValueOverride
	)		const

Returns settings value with an optional default value override.

Deprecated:

QGIS 3.26. Use valueAsVariantWithDefaultOverride() instead.

Definition at line 189 of file qgssettingsentry.cpp.

valueAsVariant() [2/4]

QVariant QgsSettingsEntryBase::valueAsVariant

(

const QString &

dynamicKeyPart = QString()

)

const

Returns settings value with.

Parameters

dynamicKeyPart

specifying the dynamic part of the settings key.

Definition at line 179 of file qgssettingsentry.cpp.

valueAsVariant() [3/4]

QVariant QgsSettingsEntryBase::valueAsVariant

(

const QStringList &

dynamicKeyPartList

)

const

Returns settings value with.

Parameters

dynamicKeyPartList

specifying the dynamic part of the settings key.

Definition at line 184 of file qgssettingsentry.cpp.

valueAsVariant() [4/4]

QVariant QgsSettingsEntryBase::valueAsVariant	(	const QStringList &	dynamicKeyPartList,
		bool	useDefaultValueOverride,
		const QVariant &	defaultValueOverride
	)		const

Returns settings value with an optional default value override.

Deprecated:

QGIS 3.26. Use valueAsVariantWithDefaultOverride() instead.

Definition at line 196 of file qgssettingsentry.cpp.

valueAsVariantWithDefaultOverride() [1/2]

QVariant QgsSettingsEntryBase::valueAsVariantWithDefaultOverride	(	const QVariant &	defaultValueOverride,
		const QString &	dynamicKeyPart = QString()
	)		const

Returns settings value with a defaultValueOverride.

Since

QGIS 3.26

Definition at line 204 of file qgssettingsentry.cpp.

valueAsVariantWithDefaultOverride() [2/2]

QVariant QgsSettingsEntryBase::valueAsVariantWithDefaultOverride	(	const QVariant &	defaultValueOverride,
		const QStringList &	dynamicKeyPartList
	)		const

Returns settings value.

Parameters

dynamicKeyPartList	specifies the list of dynamic parts of the settings key.
defaultValueOverride	if valid is used instead of the normal default value.

Since

QGIS 3.26

Definition at line 209 of file qgssettingsentry.cpp.

---

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

• /build/qgis-3.43.0+git20250613+8607fd0c408+99sid/src/core/settings/qgssettingsentry.h
• /build/qgis-3.43.0+git20250613+8607fd0c408+99sid/src/core/settings/qgssettingsentry.cpp