Extends QApplication to provide access to QGIS specific resources such as theme paths, database paths etc. More...

#include <qgsapplication.h>

Inheritance diagram for QgsApplication:

Public Types
enum	Cursor { ZoomIn , ZoomOut , Identify , CrossHair , CapturePoint , Select , Sampler }
	The Cursor enum defines constants for QGIS custom cursors. More...

enum	endian_t { XDR = 0 , NDR = 1 }
	Constants for endian-ness. More...

enum	StyleSheetType { Qt , WebBrowser }
	The StyleSheetType enum represents the stylesheet type that a widget supports. More...

Signals
void	customVariablesChanged ()
	Emitted whenever a custom global variable changes.

void	localeChanged ()
	Emitted when project locale has been changed.

void	nullRepresentationChanged ()
	This string is used to represent the value `NULL` throughout QGIS.

void	preNotify (QObject receiver, QEvent event, bool *done)

void	requestForTranslatableObjects (QgsTranslationContext *translationContext)
	Emitted when project strings which require translation are being collected for inclusion in a .ts file.

Public Member Functions
	QgsApplication (int &argc, char **argv, bool GUIenabled, const QString &profileFolder=QString(), const QString &platformName="external")
	Constructor for QgsApplication.

	~QgsApplication () override

void	collectTranslatableObjects (QgsTranslationContext *translationContext)
	Emits the signal to collect all the strings of .qgs to be included in ts file.

bool	event (QEvent *event) override
	Watch for QFileOpenEvent.

int	maxConcurrentConnectionsPerPool () const
	The maximum number of concurrent connections per connections pool.

bool	notify (QObject receiver, QEvent event) override
	Catch exceptions when sending event to receiver.

QString	translation () const
	Returns the current application translation locale code.

Static Public Member Functions
static QString	absolutePathToRelativePath (const QString &apath, const QString &targetPath)
	Converts absolute path to path relative to target.

static QgsActionScopeRegistry *	actionScopeRegistry ()
	Returns the action scope registry.

static QString	activeThemePath ()
	Returns the path to the currently active theme directory.

static QgsAnnotationItemRegistry *	annotationItemRegistry ()
	Returns the application's annotation item registry, used for annotation item types.

static QgsAnnotationRegistry *	annotationRegistry ()
	Returns the application's annotation registry, used for managing annotation types.

static QString	appIconPath ()
	Gets application icon.

static QString	applicationFullName ()
	Returns the QGIS application full name.

static void	applyGdalSkippedDrivers ()
	Apply the skipped drivers list to gdal.

static QgsAuthManager *	authManager ()
	Returns the application's authentication manager instance.

static QString	authorsFilePath ()
	Returns the path to the authors file.

static QgsBookmarkManager *	bookmarkManager ()
	Returns the application's bookmark manager, used for storing installation-wide bookmarks.

static QString	buildOutputPath ()
	Returns path to the build output directory. Valid only when running from build directory.

static QString	buildSourcePath ()
	Returns path to the source directory. Valid only when running from build directory.

static QgsCalloutRegistry *	calloutRegistry ()
	Returns the application's callout registry, used for managing callout types.

static QgsClassificationMethodRegistry *	classificationMethodRegistry ()
	Returns the application's classification methods registry, used in graduated renderer.

static QgsColorSchemeRegistry *	colorSchemeRegistry ()
	Returns the application's color scheme registry, used for managing color schemes.

static QgsConnectionRegistry *	connectionRegistry ()
	Returns the application's connection registry, used for managing saved data provider connections.

static QString	contributorsFilePath ()
	Returns the path to the contributors file.

static QgsCoordinateReferenceSystemRegistry *	coordinateReferenceSystemRegistry ()
	Returns the application's coordinate reference system (CRS) registry, which handles known CRS definitions (including user-defined CRSes).

static bool	createDatabase (QString *errorMessage=nullptr)
	initialize qgis.db

static bool	createThemeFolder ()
	Create the users theme folder.

static QVariantMap	customVariables ()
	Custom expression variables for this application.

static QgsDatabaseQueryLog *	databaseQueryLog ()
	Returns the database query log.

static QgsDataItemProviderRegistry *	dataItemProviderRegistry ()
	Returns the application's data item provider registry, which keeps a list of data item providers that may add items to the browser tree.

static QgsStyleModel *	defaultStyleModel ()
	Returns a shared QgsStyleModel containing the default style library (see QgsStyle::defaultStyle()).

static QString	defaultStylePath ()
	Returns the path to default style (works as a starting point).

static QString	defaultThemePath ()
	Returns the path to the default theme directory.

static QString	defaultThemesFolder ()
	Returns the path to default themes folder from install (works as a starting point).

static QStringList	deferredSkippedGdalDrivers ()
	Returns the list of gdal drivers that have been disabled in the current session, and thus, for safety, should not be disabled right now, but at the next application restart.

static QString	developersMapFilePath ()
	Returns the path to the developers map file.

static QString	donorsFilePath ()
	Returns the path to the donors file.

static endian_t	endian ()
	Returns whether this machine uses big or little endian.

static void	exitQgis ()
	deletes provider registry and map layer registry

static QgsExternalStorageRegistry *	externalStorageRegistry ()
	Returns registry of available external storage implementations.

static QgsFieldFormatterRegistry *	fieldFormatterRegistry ()
	Gets the registry of available field formatters.

static QgsFontManager *	fontManager ()
	Returns the application font manager, which manages available fonts and font installation for the QGIS instance.

static QCursor	getThemeCursor (Cursor cursor)
	Helper to get a theme cursor.

static QIcon	getThemeIcon (const QString &name, const QColor &fillColor=QColor(), const QColor &strokeColor=QColor())
	Helper to get a theme icon.

static QPixmap	getThemePixmap (const QString &name, const QColor &foreColor=QColor(), const QColor &backColor=QColor(), int size=16)
	Helper to get a theme icon as a pixmap.

static QgsBabelFormatRegistry *	gpsBabelFormatRegistry ()
	Returns the application's GPSBabel format registry, used for managing GPSBabel formats.

static QgsGpsConnectionRegistry *	gpsConnectionRegistry ()
	Returns the application's GPS connection registry, used for managing GPS connections.

static QString	i18nPath ()
	Returns the path to the translation directory.

static QString	iconPath (const QString &iconFile)
	Returns path to the desired icon file.

static QString	iconsPath ()
	Returns the path to the icons image directory.

static QgsImageCache *	imageCache ()
	Returns the application's image cache, used for caching resampled versions of raster images.

static void	init (QString profileFolder=QString())
	This method initializes paths etc for QGIS.

static void	initQgis ()
	loads providers

static QgsApplication *	instance ()
	Returns the singleton instance of the QgsApplication.

static bool	isRunningFromBuildDir ()
	Indicates whether running from build directory (not installed)

static QgsLayerMetadataProviderRegistry *	layerMetadataProviderRegistry ()
	Returns registry of available layer metadata provider implementations.

static QgsLayoutItemRegistry *	layoutItemRegistry ()
	Returns the application's layout item registry, used for layout item types.

static QStringList	layoutTemplatePaths ()
	Returns the paths to layout template directories.

static QString	libexecPath ()
	Returns the path with utility executables (help viewer, crssync, ...)

static QString	libraryPath ()
	Returns the path containing qgis_core, qgis_gui, qgispython (and other) libraries.

static QString	licenceFilePath ()
	Returns the path to the licence file.

static QString	locale ()
	Returns the QGIS locale.

static QgsLocalizedDataPathRegistry *	localizedDataPathRegistry ()
	Returns the registry of data repositories These are used as paths for basemaps, logos, etc.

static int	maxThreads ()
	Gets maximum concurrent thread count.

static QgsMessageLog *	messageLog ()
	Returns the application's message log.

static QString	metadataPath ()
	Returns the path to the metadata directory.

static QgsNetworkContentFetcherRegistry *	networkContentFetcherRegistry ()
	Returns the application's network content registry used for fetching temporary files during QGIS session.

static QString	nullRepresentation ()
	This string is used to represent the value `NULL` throughout QGIS.

static QgsNumericFormatRegistry *	numericFormatRegistry ()
	Gets the registry of available numeric formats.

static QString	osName ()
	Returns a string name of the operating system QGIS is running on.

static QgsPageSizeRegistry *	pageSizeRegistry ()
	Returns the application's page size registry, used for managing layout page sizes.

static QgsPaintEffectRegistry *	paintEffectRegistry ()
	Returns the application's paint effect registry, used for managing paint effects.

static QString	pkgDataPath ()
	Returns the common root path of all application data directories.

static QString	platform ()
	Returns the QGIS platform name, e.g., "desktop", "server", "qgis_process" or "external" (for external CLI scripts).

static QgsPluginLayerRegistry *	pluginLayerRegistry ()
	Returns the application's plugin layer registry, used for managing plugin layer types.

static QString	pluginPath ()
	Returns the path to the application plugin directory.

static QgsPointCloudRendererRegistry *	pointCloudRendererRegistry ()
	Returns the application's point cloud renderer registry, used for managing point cloud layer 2D renderers.

static QString	prefixPath ()
	Returns the path to the application prefix directory.

static QgsProcessingRegistry *	processingRegistry ()
	Returns the application's processing registry, used for managing processing providers, algorithms, and various parameters and outputs.

static QgsRuntimeProfiler *	profiler ()
	Returns the application runtime profiler.

static QgsProjectStorageRegistry *	projectStorageRegistry ()
	Returns registry of available project storage implementations.

static QString	qgisAuthDatabaseFilePath ()
	Returns the path to the user authentication database file: qgis-auth.db.

static QString	qgisMasterDatabaseFilePath ()
	Returns the path to the master qgis.db file.

static QString	qgisSettingsDirPath ()
	Returns the path to the settings directory in user's home dir.

static QString	qgisUserDatabaseFilePath ()
	Returns the path to the user qgis.db file.

static QString	qmlImportPath ()
	Returns the path where QML components are installed for QGIS Quick library.

static QgsRasterRendererRegistry *	rasterRendererRegistry ()
	Returns the application's raster renderer registry, used for managing raster layer renderers.

static QgsRecentStyleHandler *	recentStyleHandler ()
	Returns the handler for recently used style items.

static void	registerGdalDriversFromSettings ()
	Register gdal drivers, excluding the ones mentioned in "gdal/skipList" setting.

static void	registerOgrDrivers ()
	Register OGR drivers ensuring this only happens once.

static QString	relativePathToAbsolutePath (const QString &rpath, const QString &targetPath)
	Converts path relative to target to an absolute path.

static Qgs3DRendererRegistry *	renderer3DRegistry ()
	Returns registry of available 3D renderers.

static QgsRendererRegistry *	rendererRegistry ()
	Returns the application's renderer registry, used for managing vector layer renderers.

static QString	reportStyleSheet (QgsApplication::StyleSheetType styleSheetType=QgsApplication::StyleSheetType::Qt)
	Returns a css style sheet for reports, the styleSheetType argument determines what type of stylesheet is supported by the widget.

static QString	resolvePkgPath ()
	Calculate the application pkg path.

static void	restoreGdalDriver (const QString &driver)
	Sets the GDAL_SKIP environment variable to exclude the specified driver and then calls GDALDriverManager::AutoSkipDrivers() to unregister it.

static QgsScaleBarRendererRegistry *	scaleBarRendererRegistry ()
	Gets the registry of available scalebar renderers.

static int	scaleIconSize (int standardSize, bool applyDevicePixelRatio=false)
	Scales an icon size to compensate for display pixel density, making the icon size hi-dpi friendly, whilst still resulting in pixel-perfect sizes for low-dpi displays.

static QgsSensorRegistry *	sensorRegistry ()
	Returns the application's sensor registry, used for sensor types.

static QString	serverResourcesPath ()
	Returns the path to the server resources directory.

static void	setAuthDatabaseDirPath (const QString &authDbDirPath)
	Alters authentication data base directory path - used by 3rd party apps.

static void	setCustomVariable (const QString &name, const QVariant &value)
	Set a single custom expression variable.

static void	setCustomVariables (const QVariantMap &customVariables)
	Custom expression variables for this application.

static void	setDefaultSvgPaths (const QStringList &pathList)
	Alters default svg paths - used by 3rd party apps.

static void	setFileOpenEventReceiver (QObject *receiver)
	Sets the FileOpen event receiver.

static void	setLocale (const QLocale &locale)
	Sets the QGIS locale - used mainly by 3rd party apps and tests.

static void	setMaxThreads (int maxThreads)
	Set maximum concurrent thread count.

static void	setNullRepresentation (const QString &nullRepresentation)
	This string is used to represent the value `NULL` throughout QGIS.

static void	setPkgDataPath (const QString &pkgDataPath)
	Alters pkg data path - used by 3rd party apps.

static void	setPluginPath (const QString &pluginPath)
	Alters plugin path - used by 3rd party apps.

static void	setPrefixPath (const QString &prefixPath, bool useDefaultPaths=false)
	Alters prefix path - used by 3rd party apps.

static void	setSkippedGdalDrivers (const QStringList &skippedGdalDrivers, const QStringList &deferredSkippedGdalDrivers)
	Sets the list of gdal drivers that should be disabled (skippedGdalDrivers), but excludes for now the ones defines in deferredSkippedGdalDrivers.

static void	setSvgPaths (const QStringList &svgPaths)
	Sets the paths to svg directories and invalidates the svg path list cache.

static void	setThemeName (const QString &themeName)
	Set the active theme to the specified theme.

static Q_DECL_DEPRECATED QgsSettingsRegistryCore *	settingsRegistryCore ()
	Returns the application's settings registry, used for managing application settings.

static void	setTranslation (const QString &translation)
	Set translation locale code.

static void	setUITheme (const QString &themeName)
	Set the current UI theme used to style the interface.

static QRegularExpression	shortNameRegularExpression ()
	Returns the short name regular expression for line edit validator.

static QString	showSettings ()
	Convenience function to get a summary of the paths used in this application instance useful for debugging mainly.

static void	skipGdalDriver (const QString &driver)
	Sets the GDAL_SKIP environment variable to include the specified driver and then calls GDALDriverManager::AutoSkipDrivers() to unregister it.

static QStringList	skippedGdalDrivers ()
	Returns the list of gdal drivers that should be skipped (based on GDAL_SKIP environment variable)

static QgsSourceCache *	sourceCache ()
	Returns the application's source cache, used for caching embedded and remote source strings as local files.

static QString	splashPath ()
	Returns the path to the splash screen image directory.

static QString	sponsorsFilePath ()
	Returns the path to the sponsors file.

static QString	srsDatabaseFilePath ()
	Returns the path to the srs.db file.

static QgsSvgCache *	svgCache ()
	Returns the application's SVG cache, used for caching SVG images and handling parameter replacement within SVG files.

static QStringList	svgPaths ()
	Returns the paths to svg directories.

static Qgs3DSymbolRegistry *	symbol3DRegistry ()
	Returns registry of available 3D symbols.

static QgsSymbolLayerRegistry *	symbolLayerRegistry ()
	Returns the application's symbol layer registry, used for managing symbol layers.

static QMap< QString, QString >	systemEnvVars ()
	Returns the system environment variables passed to application.

static int	systemMemorySizeMb ()
	Returns the size of the system memory (RAM) in megabytes.

static QgsTaskManager *	taskManager ()
	Returns the application's task manager, used for managing application wide background task handling.

static QString	themeName ()
	Set the active theme to the specified theme.

static QgsTileDownloadManager *	tileDownloadManager ()
	Returns the application's tile download manager, used for download of map tiles when rendering.

static QgsTiledSceneRendererRegistry *	tiledSceneRendererRegistry ()
	Returns the application's tiled scene renderer registry, used for managing tiled scene layer 2D renderers.

static QString	translatorsFilePath ()
	Returns the path to the sponsors file.

static QHash< QString, QString >	uiThemes ()
	All themes found in ~/.qgis3/themes folder.

static QString	userFullName ()
	Returns the user's operating system login account full display name.

static QString	userLoginName ()
	Returns the user's operating system login account name.

static QString	userStylePath ()
	Returns the path to user's style.

static QString	userThemesFolder ()
	Returns the path to user's themes folder.

static QgsValidityCheckRegistry *	validityCheckRegistry ()
	Returns the application's validity check registry, used for managing validity checks.

Static Public Attributes
static const char *	QGIS_APPLICATION_NAME = "QGIS3"

static const char *	QGIS_ORGANIZATION_DOMAIN = "qgis.org"

static const char *	QGIS_ORGANIZATION_NAME = "QGIS"

static const QgsSettingsEntryString *	settingsLocaleGlobalLocale = new QgsSettingsEntryString( QStringLiteral( "globalLocale" ), QgsSettingsTree::sTreeLocale, QString() )
	Settings entry locale global locale.

static const QgsSettingsEntryBool *	settingsLocaleOverrideFlag = new QgsSettingsEntryBool( QStringLiteral( "overrideFlag" ), QgsSettingsTree::sTreeLocale, false )
	Settings entry locale override flag.

static const QgsSettingsEntryBool *	settingsLocaleShowGroupSeparator = new QgsSettingsEntryBool( QStringLiteral( "showGroupSeparator" ), QgsSettingsTree::sTreeLocale, false )
	Settings entry locale show group separator.

static const QgsSettingsEntryString *	settingsLocaleUserLocale = new QgsSettingsEntryString( QStringLiteral( "userLocale" ), QgsSettingsTree::sTreeLocale, QString() )
	Settings entry locale user locale.

static const QgsSettingsEntryStringList *	settingsSearchPathsForSVG = new QgsSettingsEntryStringList( QStringLiteral( "searchPathsForSVG" ), QgsSettingsTree::sTreeSvg, QStringList() )
	Settings entry search path for SVG.

Friends
class	TestQgsApplication

Detailed Description

Extends QApplication to provide access to QGIS specific resources such as theme paths, database paths etc.

This is a subclass of QApplication and should be instantiated in place of QApplication. Most methods are static in keeping with the design of QApplication.

This class hides platform-specific path information and provides a portable way of referencing specific files and directories. Ideally, hard-coded paths should appear only here and not in other modules so that platform-conditional code is minimized and paths are easier to change due to centralization.

Definition at line 95 of file qgsapplication.h.

Member Enumeration Documentation

◆ Cursor

enum QgsApplication::Cursor

The Cursor enum defines constants for QGIS custom cursors.

Enumerator
ZoomIn	Zoom in.
ZoomOut	Zoom out.
Identify	Identify: obtain information about the object.
CrossHair	Precisely identify a point on the canvas.
CapturePoint	Select and capture a point or a feature.
Select	Select a rectangle.
Sampler	Color/Value picker.

Definition at line 399 of file qgsapplication.h.

◆ endian_t

enum QgsApplication::endian_t

Constants for endian-ness.

Enumerator
XDR
NDR

Definition at line 552 of file qgsapplication.h.

◆ StyleSheetType

enum QgsApplication::StyleSheetType

The StyleSheetType enum represents the stylesheet type that a widget supports.

Is is used by widgets that display HTML content to retrieve the standard QGIS stylesheet, maintained according to QGIS visual guidelines.

Enumerator
Qt
WebBrowser	StyleSheet for Qt GUI widgets (based on QLabel or QTextBrowser), supports basic CSS and Qt extensions.

Definition at line 158 of file qgsapplication.h.

Constructor & Destructor Documentation

◆ QgsApplication()

QgsApplication::QgsApplication	(	int &	argc,
		char **	argv,
		bool	GUIenabled,
		const QString &	profileFolder = `QString()`,
		const QString &	platformName = `"external"`
	)

Constructor for QgsApplication.

Parameters

argc	command line argument count
argv	command line arguments
GUIenabled	set to `true` if a GUI application is required, or `false` for a console only application
profileFolder	optional string representing the profile to load at startup
platformName	the QGIS platform name, e.g., "desktop", "server", "qgis_process" or "external" (for external CLI scripts)

Definition at line 201 of file qgsapplication.cpp.

◆ ~QgsApplication()

QgsApplication::~QgsApplication ( )

override

Definition at line 528 of file qgsapplication.cpp.

Member Function Documentation

◆ absolutePathToRelativePath()

QString QgsApplication::absolutePathToRelativePath	(	const QString &	apath,
		const QString &	targetPath
	)

static

Converts absolute path to path relative to target.

Definition at line 1793 of file qgsapplication.cpp.

◆ actionScopeRegistry()

QgsActionScopeRegistry * QgsApplication::actionScopeRegistry ( )

static

Returns the action scope registry.

Definition at line 2148 of file qgsapplication.cpp.

◆ activeThemePath()

QString QgsApplication::activeThemePath ( )

static

Returns the path to the currently active theme directory.

Definition at line 734 of file qgsapplication.cpp.

◆ annotationItemRegistry()

QgsAnnotationItemRegistry * QgsApplication::annotationItemRegistry ( )

static

Returns the application's annotation item registry, used for annotation item types.

Since: QGIS 3.16

Definition at line 2514 of file qgsapplication.cpp.

◆ annotationRegistry()

QgsAnnotationRegistry * QgsApplication::annotationRegistry ( )

static

Returns the application's annotation registry, used for managing annotation types.

Note: not available in Python bindings

Definition at line 2599 of file qgsapplication.cpp.

◆ appIconPath()

QString QgsApplication::appIconPath ( )

static

Gets application icon.

Definition at line 749 of file qgsapplication.cpp.

◆ applicationFullName()

QString QgsApplication::applicationFullName ( )

static

Returns the QGIS application full name.

It can be defined by the environment variable QGIS_APPLICATION_FULL_NAME or the /qgis/application_full_name in the QGIS config file.

By default it is equal to applicationName()+' '+platform()

See also: platform()

Since: QGIS 3.30

Definition at line 1435 of file qgsapplication.cpp.

◆ applyGdalSkippedDrivers()

void QgsApplication::applyGdalSkippedDrivers ( )

static

Apply the skipped drivers list to gdal.

See also: skipGdalDriver; restoreGdalDriver; skippedGdalDrivers

Definition at line 1994 of file qgsapplication.cpp.

◆ authManager()

QgsAuthManager * QgsApplication::authManager ( )

static

Returns the application's authentication manager instance.

Note: this can be nullptr if called before initQgis

See also: initQgis

Definition at line 1546 of file qgsapplication.cpp.

◆ authorsFilePath()

QString QgsApplication::authorsFilePath ( )

static

Returns the path to the authors file.

Definition at line 1129 of file qgsapplication.cpp.

◆ bookmarkManager()

QgsBookmarkManager * QgsApplication::bookmarkManager ( )

static

Returns the application's bookmark manager, used for storing installation-wide bookmarks.

Since: QGIS 3.10

Definition at line 2544 of file qgsapplication.cpp.

◆ buildOutputPath()

QString QgsApplication::buildOutputPath ( )

static

Returns path to the build output directory. Valid only when running from build directory.

Definition at line 1913 of file qgsapplication.cpp.

◆ buildSourcePath()

QString QgsApplication::buildSourcePath ( )

static

Returns path to the source directory. Valid only when running from build directory.

Definition at line 1908 of file qgsapplication.cpp.

◆ calloutRegistry()

QgsCalloutRegistry * QgsApplication::calloutRegistry ( )

static

Returns the application's callout registry, used for managing callout types.

Since: QGIS 3.10

Definition at line 2504 of file qgsapplication.cpp.

◆ classificationMethodRegistry()

QgsClassificationMethodRegistry * QgsApplication::classificationMethodRegistry ( )

static

Returns the application's classification methods registry, used in graduated renderer.

Since: QGIS 3.10

Definition at line 2539 of file qgsapplication.cpp.

◆ collectTranslatableObjects()

void QgsApplication::collectTranslatableObjects ( QgsTranslationContext * translationContext )

Emits the signal to collect all the strings of .qgs to be included in ts file.

Since: QGIS 3.4

Definition at line 2119 of file qgsapplication.cpp.

◆ colorSchemeRegistry()

QgsColorSchemeRegistry * QgsApplication::colorSchemeRegistry ( )

static

Returns the application's color scheme registry, used for managing color schemes.

Definition at line 2419 of file qgsapplication.cpp.

◆ connectionRegistry()

QgsConnectionRegistry * QgsApplication::connectionRegistry ( )

static

Returns the application's connection registry, used for managing saved data provider connections.

Since: QGIS 3.14

Definition at line 2584 of file qgsapplication.cpp.

◆ contributorsFilePath()

QString QgsApplication::contributorsFilePath ( )

static

Returns the path to the contributors file.

Contributors are people who have submitted patches but don't have commit access.

Definition at line 1134 of file qgsapplication.cpp.

◆ coordinateReferenceSystemRegistry()

QgsCoordinateReferenceSystemRegistry * QgsApplication::coordinateReferenceSystemRegistry ( )

static

Returns the application's coordinate reference system (CRS) registry, which handles known CRS definitions (including user-defined CRSes).

Since: QGIS 3.18

Definition at line 2469 of file qgsapplication.cpp.

◆ createDatabase()

bool QgsApplication::createDatabase ( QString * errorMessage = nullptr )

static

initialize qgis.db

Definition at line 2153 of file qgsapplication.cpp.

◆ createThemeFolder()

bool QgsApplication::createThemeFolder ( )

static

Create the users theme folder.

Definition at line 2010 of file qgsapplication.cpp.

◆ customVariables()

QVariantMap QgsApplication::customVariables ( )

static

Custom expression variables for this application.

This does not include generated variables (like system name, user name etc.)

See also: QgsExpressionContextUtils::globalScope().

Definition at line 2043 of file qgsapplication.cpp.

◆ customVariablesChanged

void QgsApplication::customVariablesChanged ( )

signal

Emitted whenever a custom global variable changes.

◆ databaseQueryLog()

QgsDatabaseQueryLog * QgsApplication::databaseQueryLog ( )

static

Returns the database query log.

Since: QGIS 3.24

Definition at line 2559 of file qgsapplication.cpp.

◆ dataItemProviderRegistry()

QgsDataItemProviderRegistry * QgsApplication::dataItemProviderRegistry ( )

static

Returns the application's data item provider registry, which keeps a list of data item providers that may add items to the browser tree.

Definition at line 2449 of file qgsapplication.cpp.

◆ defaultStyleModel()

QgsStyleModel * QgsApplication::defaultStyleModel ( )

static

Returns a shared QgsStyleModel containing the default style library (see QgsStyle::defaultStyle()).

Using this shared model instead of creating a new QgsStyleModel improves performance.

Since: QGIS 3.10

Definition at line 2564 of file qgsapplication.cpp.

◆ defaultStylePath()

QString QgsApplication::defaultStylePath ( )

static

Returns the path to default style (works as a starting point).

Definition at line 1484 of file qgsapplication.cpp.

◆ defaultThemePath()

QString QgsApplication::defaultThemePath ( )

static

Returns the path to the default theme directory.

Definition at line 730 of file qgsapplication.cpp.

◆ defaultThemesFolder()

QString QgsApplication::defaultThemesFolder ( )

static

Returns the path to default themes folder from install (works as a starting point).

Definition at line 1489 of file qgsapplication.cpp.

◆ deferredSkippedGdalDrivers()

QStringList QgsApplication::deferredSkippedGdalDrivers ( )

static

Returns the list of gdal drivers that have been disabled in the current session, and thus, for safety, should not be disabled right now, but at the next application restart.

Since: QGIS 3.10

Definition at line 1989 of file qgsapplication.cpp.

◆ developersMapFilePath()

QString QgsApplication::developersMapFilePath ( )

static

Returns the path to the developers map file.

The developers map was created by using leaflet framework, it shows the contributors.json file.

Definition at line 1138 of file qgsapplication.cpp.

◆ donorsFilePath()

QString QgsApplication::donorsFilePath ( )

static

Returns the path to the donors file.

Definition at line 1148 of file qgsapplication.cpp.

◆ endian()

QgsApplication::endian_t QgsApplication::endian ( )

static

Returns whether this machine uses big or little endian.

Definition at line 1514 of file qgsapplication.cpp.

◆ event()

bool QgsApplication::event ( QEvent * event )

override

Watch for QFileOpenEvent.

Definition at line 560 of file qgsapplication.cpp.

◆ exitQgis()

void QgsApplication::exitQgis ( )

static

deletes provider registry and map layer registry

Definition at line 1566 of file qgsapplication.cpp.

◆ externalStorageRegistry()

QgsExternalStorageRegistry * QgsApplication::externalStorageRegistry ( )

static

Returns registry of available external storage implementations.

Since: QGIS 3.20

Definition at line 2634 of file qgsapplication.cpp.

◆ fieldFormatterRegistry()

QgsFieldFormatterRegistry * QgsApplication::fieldFormatterRegistry ( )

static

Gets the registry of available field formatters.

Definition at line 2609 of file qgsapplication.cpp.

◆ fontManager()

QgsFontManager * QgsApplication::fontManager ( )

static

Returns the application font manager, which manages available fonts and font installation for the QGIS instance.

Since: QGIS 3.28

Definition at line 2569 of file qgsapplication.cpp.

◆ getThemeCursor()

QCursor QgsApplication::getThemeCursor ( Cursor cursor )

static

Helper to get a theme cursor.

It will fall back to the default theme if the active theme does not have the required icon. Cursors are automatically scaled to look like a 16px cursor on 96dpi screens.

Definition at line 844 of file qgsapplication.cpp.

◆ getThemeIcon()

QIcon QgsApplication::getThemeIcon	(	const QString &	name,
		const QColor &	fillColor = `QColor()`,
		const QColor &	strokeColor = `QColor()`
	)

static

Helper to get a theme icon.

It will fall back to the default theme if the active theme does not have the required icon.

Since QGIS 3.20, the optional fillColor and strokeColor arguments can be used to control the color of parameter based SVG icons.

Definition at line 770 of file qgsapplication.cpp.

◆ getThemePixmap()

QPixmap QgsApplication::getThemePixmap	(	const QString &	name,
		const QColor &	foreColor = `QColor()`,
		const QColor &	backColor = `QColor()`,
		int	size = `16`
	)

static

Helper to get a theme icon as a pixmap.

It will fall back to the default theme if the active theme does not have the required icon.

If foreColor or backColor are specified, then these colors will be used for parametrized colors in SVG files wherever available. If colors are specified then the size argument also must be set.

Definition at line 909 of file qgsapplication.cpp.

◆ gpsBabelFormatRegistry()

QgsBabelFormatRegistry * QgsApplication::gpsBabelFormatRegistry ( )

static

Returns the application's GPSBabel format registry, used for managing GPSBabel formats.

Since: QGIS 3.22

Definition at line 2529 of file qgsapplication.cpp.

◆ gpsConnectionRegistry()

QgsGpsConnectionRegistry * QgsApplication::gpsConnectionRegistry ( )

static

Returns the application's GPS connection registry, used for managing GPS connections.

Definition at line 2524 of file qgsapplication.cpp.

◆ i18nPath()

QString QgsApplication::i18nPath ( )

static

Returns the path to the translation directory.

Definition at line 1163 of file qgsapplication.cpp.

◆ iconPath()

QString QgsApplication::iconPath ( const QString & iconFile )

static

Returns path to the desired icon file.

First it tries to use the active theme path, then default theme path

Definition at line 759 of file qgsapplication.cpp.

◆ iconsPath()

QString QgsApplication::iconsPath ( )

static

Returns the path to the icons image directory.

Definition at line 1201 of file qgsapplication.cpp.

◆ imageCache()

QgsImageCache * QgsApplication::imageCache ( )

static

Returns the application's image cache, used for caching resampled versions of raster images.

See also: svgCache()

Since: QGIS 3.6

Definition at line 2479 of file qgsapplication.cpp.

◆ init()

void QgsApplication::init ( QString profileFolder = QString() )

static

This method initializes paths etc for QGIS.

Called by the ctor or call it manually when your app does not extend the QApplication class.

Note: you will probably want to call initQgis too to load the providers in the above case.; not available in Python bindings

Definition at line 221 of file qgsapplication.cpp.

◆ initQgis()

void QgsApplication::initQgis ( )

static

loads providers

Definition at line 1519 of file qgsapplication.cpp.

◆ instance()

QgsApplication * QgsApplication::instance ( )

static

Returns the singleton instance of the QgsApplication.

Definition at line 555 of file qgsapplication.cpp.

◆ isRunningFromBuildDir()

static bool QgsApplication::isRunningFromBuildDir ( )

inlinestatic

Indicates whether running from build directory (not installed)

Definition at line 598 of file qgsapplication.h.

◆ layerMetadataProviderRegistry()

QgsLayerMetadataProviderRegistry * QgsApplication::layerMetadataProviderRegistry ( )

static

Returns registry of available layer metadata provider implementations.

Since: QGIS 3.28

Definition at line 2589 of file qgsapplication.cpp.

◆ layoutItemRegistry()

QgsLayoutItemRegistry * QgsApplication::layoutItemRegistry ( )

static

Returns the application's layout item registry, used for layout item types.

Definition at line 2509 of file qgsapplication.cpp.

◆ layoutTemplatePaths()

QStringList QgsApplication::layoutTemplatePaths ( )

static

Returns the paths to layout template directories.

Definition at line 1270 of file qgsapplication.cpp.

◆ libexecPath()

QString QgsApplication::libexecPath ( )

static

Returns the path with utility executables (help viewer, crssync, ...)

Definition at line 1504 of file qgsapplication.cpp.

◆ libraryPath()

QString QgsApplication::libraryPath ( )

static

Returns the path containing qgis_core, qgis_gui, qgispython (and other) libraries.

Definition at line 1499 of file qgsapplication.cpp.

◆ licenceFilePath()

QString QgsApplication::licenceFilePath ( )

static

Returns the path to the licence file.

Definition at line 1158 of file qgsapplication.cpp.

◆ locale()

QString QgsApplication::locale ( )

static

Returns the QGIS locale.

Definition at line 1454 of file qgsapplication.cpp.

◆ localeChanged

void QgsApplication::localeChanged ( )

signal

Emitted when project locale has been changed.

Since: QGIS 3.22.2

◆ localizedDataPathRegistry()

QgsLocalizedDataPathRegistry * QgsApplication::localizedDataPathRegistry ( )

static

Returns the registry of data repositories These are used as paths for basemaps, logos, etc.

which can be referenced differently across work stations.

See also: QgsLocalizedDataPathRegistry

Since: QGIS 3.14

Definition at line 2639 of file qgsapplication.cpp.

◆ maxConcurrentConnectionsPerPool()

int QgsApplication::maxConcurrentConnectionsPerPool ( ) const

The maximum number of concurrent connections per connections pool.

Note: QGIS may in some situations allocate more than this amount of connections to avoid deadlocks.

Since: QGIS 3.4

Definition at line 2100 of file qgsapplication.cpp.

◆ maxThreads()

int QgsApplication::maxThreads ( )

static

Gets maximum concurrent thread count.

Definition at line 754 of file qgsapplication.cpp.

◆ messageLog()

QgsMessageLog * QgsApplication::messageLog ( )

static

Returns the application's message log.

Definition at line 2574 of file qgsapplication.cpp.

◆ metadataPath()

QString QgsApplication::metadataPath ( )

static

Returns the path to the metadata directory.

Definition at line 1171 of file qgsapplication.cpp.

◆ networkContentFetcherRegistry()

QgsNetworkContentFetcherRegistry * QgsApplication::networkContentFetcherRegistry ( )

static

Returns the application's network content registry used for fetching temporary files during QGIS session.

Since: QGIS 3.2

Definition at line 2489 of file qgsapplication.cpp.

◆ notify()

bool QgsApplication::notify	(	QObject *	receiver,
		QEvent *	event
	)

override

Catch exceptions when sending event to receiver.

Definition at line 588 of file qgsapplication.cpp.

◆ nullRepresentation()

QString QgsApplication::nullRepresentation ( )

static

This string is used to represent the value NULL throughout QGIS.

In general, when passing values around, prefer to use a null QVariant QVariant( field.type() ) or QVariant( QVariant::Int ). This value should only be used in the final presentation step when showing values in a widget or sending it to a web browser.

Definition at line 2124 of file qgsapplication.cpp.

◆ nullRepresentationChanged

void QgsApplication::nullRepresentationChanged ( )

signal

This string is used to represent the value NULL throughout QGIS.

In general, when passing values around, prefer to use a null QVariant QVariant( field.type() ) or QVariant( QVariant::Int ). This value should only be used in the final presentation step when showing values in a widget or sending it to a web browser.

◆ numericFormatRegistry()

QgsNumericFormatRegistry * QgsApplication::numericFormatRegistry ( )

static

Gets the registry of available numeric formats.

Since: QGIS 3.12

Definition at line 2604 of file qgsapplication.cpp.

◆ osName()

QString QgsApplication::osName ( )

static

Returns a string name of the operating system QGIS is running on.

See also: platform()

Definition at line 1371 of file qgsapplication.cpp.

◆ pageSizeRegistry()

QgsPageSizeRegistry * QgsApplication::pageSizeRegistry ( )

static

Returns the application's page size registry, used for managing layout page sizes.

Definition at line 2594 of file qgsapplication.cpp.

◆ paintEffectRegistry()

QgsPaintEffectRegistry * QgsApplication::paintEffectRegistry ( )

static

Returns the application's paint effect registry, used for managing paint effects.

Definition at line 2424 of file qgsapplication.cpp.

◆ pkgDataPath()

QString QgsApplication::pkgDataPath ( )

static

Returns the common root path of all application data directories.

Definition at line 722 of file qgsapplication.cpp.

◆ platform()

QString QgsApplication::platform ( )

static

Returns the QGIS platform name, e.g., "desktop", "server", "qgis_process" or "external" (for external CLI scripts).

See also: osName()

Definition at line 1430 of file qgsapplication.cpp.

◆ pluginLayerRegistry()

QgsPluginLayerRegistry * QgsApplication::pluginLayerRegistry ( )

static

Returns the application's plugin layer registry, used for managing plugin layer types.

Definition at line 2534 of file qgsapplication.cpp.

◆ pluginPath()

QString QgsApplication::pluginPath ( )

static

Returns the path to the application plugin directory.

Definition at line 717 of file qgsapplication.cpp.

◆ pointCloudRendererRegistry()

QgsPointCloudRendererRegistry * QgsApplication::pointCloudRendererRegistry ( )

static

Returns the application's point cloud renderer registry, used for managing point cloud layer 2D renderers.

Since: QGIS 3.18

Definition at line 2439 of file qgsapplication.cpp.

◆ prefixPath()

QString QgsApplication::prefixPath ( )

static

Returns the path to the application prefix directory.

Definition at line 699 of file qgsapplication.cpp.

◆ preNotify

void QgsApplication::preNotify	(	QObject *	receiver,
		QEvent *	event,
		bool *	done
	)

signal

Note: not available in Python bindings

◆ processingRegistry()

QgsProcessingRegistry * QgsApplication::processingRegistry ( )

static

Returns the application's processing registry, used for managing processing providers, algorithms, and various parameters and outputs.

Definition at line 2579 of file qgsapplication.cpp.

◆ profiler()

QgsRuntimeProfiler * QgsApplication::profiler ( )

static

Returns the application runtime profiler.

Definition at line 626 of file qgsapplication.cpp.

◆ projectStorageRegistry()

QgsProjectStorageRegistry * QgsApplication::projectStorageRegistry ( )

static

Returns registry of available project storage implementations.

Since: QGIS 3.2

Definition at line 2629 of file qgsapplication.cpp.

◆ qgisAuthDatabaseFilePath()

QString QgsApplication::qgisAuthDatabaseFilePath ( )

static

Returns the path to the user authentication database file: qgis-auth.db.

Definition at line 1191 of file qgsapplication.cpp.

◆ qgisMasterDatabaseFilePath()

QString QgsApplication::qgisMasterDatabaseFilePath ( )

static

Returns the path to the master qgis.db file.

Definition at line 1176 of file qgsapplication.cpp.

◆ qgisSettingsDirPath()

QString QgsApplication::qgisSettingsDirPath ( )

static

Returns the path to the settings directory in user's home dir.

Definition at line 1181 of file qgsapplication.cpp.

◆ qgisUserDatabaseFilePath()

QString QgsApplication::qgisUserDatabaseFilePath ( )

static

Returns the path to the user qgis.db file.

Definition at line 1186 of file qgsapplication.cpp.

◆ qmlImportPath()

QString QgsApplication::qmlImportPath ( )

static

Returns the path where QML components are installed for QGIS Quick library.

Returns empty string when QGIS is built without Quick support

Since: QGIS 3.2

Definition at line 1509 of file qgsapplication.cpp.

◆ rasterRendererRegistry()

QgsRasterRendererRegistry * QgsApplication::rasterRendererRegistry ( )

static

Returns the application's raster renderer registry, used for managing raster layer renderers.

Note: not available in Python bindings

Definition at line 2434 of file qgsapplication.cpp.

◆ recentStyleHandler()

QgsRecentStyleHandler * QgsApplication::recentStyleHandler ( )

static

Returns the handler for recently used style items.

Since: QGIS 3.22

Definition at line 2554 of file qgsapplication.cpp.

◆ registerGdalDriversFromSettings()

void QgsApplication::registerGdalDriversFromSettings ( )

static

Register gdal drivers, excluding the ones mentioned in "gdal/skipList" setting.

Since: QGIS 3.10

Definition at line 1966 of file qgsapplication.cpp.

◆ registerOgrDrivers()

void QgsApplication::registerOgrDrivers ( )

static

Register OGR drivers ensuring this only happens once.

This is a workaround for an issue with older gdal versions that caused duplicate driver name entries to appear in the list of registered drivers when QgsApplication::registerOgrDrivers was called multiple times.

Definition at line 1785 of file qgsapplication.cpp.

◆ relativePathToAbsolutePath()

QString QgsApplication::relativePathToAbsolutePath	(	const QString &	rpath,
		const QString &	targetPath
	)

static

Converts path relative to target to an absolute path.

Definition at line 1858 of file qgsapplication.cpp.

◆ renderer3DRegistry()

Qgs3DRendererRegistry * QgsApplication::renderer3DRegistry ( )

static

Returns registry of available 3D renderers.

Definition at line 2614 of file qgsapplication.cpp.

◆ rendererRegistry()

QgsRendererRegistry * QgsApplication::rendererRegistry ( )

static

Returns the application's renderer registry, used for managing vector layer renderers.

Definition at line 2429 of file qgsapplication.cpp.

◆ reportStyleSheet()

QString QgsApplication::reportStyleSheet ( QgsApplication::StyleSheetType styleSheetType = QgsApplication::StyleSheetType::Qt )

static

Returns a css style sheet for reports, the styleSheetType argument determines what type of stylesheet is supported by the widget.

Typically you will use this method by doing: QString myStyle = QgsApplication::reportStyleSheet(); textBrowserReport->document()->setDefaultStyleSheet(myStyle); if you are using a QgsWebView you will need to manually inject the CSS into a head -> script tag instead.

Returns: the stylesheet CSS rules.

Note: if styleSheetType equals StyleSheetType::Qt you can use the special Qt extensions too, for example the gradient fills for backgrounds.

Definition at line 1634 of file qgsapplication.cpp.

◆ requestForTranslatableObjects

void QgsApplication::requestForTranslatableObjects ( QgsTranslationContext * translationContext )

signal

Emitted when project strings which require translation are being collected for inclusion in a .ts file.

In order to register translatable strings, connect to this signal and register the strings within the specified translationContext.

Since: QGIS 3.4

◆ resolvePkgPath()

QString QgsApplication::resolvePkgPath ( )

static

Calculate the application pkg path.

Returns: the resolved pkg path

Definition at line 929 of file qgsapplication.cpp.

◆ restoreGdalDriver()

void QgsApplication::restoreGdalDriver ( const QString & driver )

static

Sets the GDAL_SKIP environment variable to exclude the specified driver and then calls GDALDriverManager::AutoSkipDrivers() to unregister it.

The driver name should be the short format of the Gdal driver name e.g. GTIFF.

Definition at line 1935 of file qgsapplication.cpp.

◆ scaleBarRendererRegistry()

QgsScaleBarRendererRegistry * QgsApplication::scaleBarRendererRegistry ( )

static

Gets the registry of available scalebar renderers.

Since: QGIS 3.14

Definition at line 2624 of file qgsapplication.cpp.

◆ scaleIconSize()

int QgsApplication::scaleIconSize	(	int	standardSize,
		bool	applyDevicePixelRatio = `false`
	)

static

Scales an icon size to compensate for display pixel density, making the icon size hi-dpi friendly, whilst still resulting in pixel-perfect sizes for low-dpi displays.

standardSize should be set to a standard icon size, e.g. 16, 24, 48, etc.

Since: QGIS 3.16

Definition at line 2087 of file qgsapplication.cpp.

◆ sensorRegistry()

QgsSensorRegistry * QgsApplication::sensorRegistry ( )

static

Returns the application's sensor registry, used for sensor types.

Since: QGIS 3.32

Definition at line 2519 of file qgsapplication.cpp.

◆ serverResourcesPath()

QString QgsApplication::serverResourcesPath ( )

static

Returns the path to the server resources directory.

Definition at line 1494 of file qgsapplication.cpp.

◆ setAuthDatabaseDirPath()

void QgsApplication::setAuthDatabaseDirPath ( const QString & authDbDirPath )

static

Alters authentication data base directory path - used by 3rd party apps.

Definition at line 690 of file qgsapplication.cpp.

◆ setCustomVariable()

void QgsApplication::setCustomVariable	(	const QString &	name,
		const QVariant &	value
	)

static

Set a single custom expression variable.

Definition at line 2077 of file qgsapplication.cpp.

◆ setCustomVariables()

void QgsApplication::setCustomVariables ( const QVariantMap & customVariables )

static

Custom expression variables for this application.

Do not include generated variables (like system name, user name etc.)

See also: QgsExpressionContextUtils::globalScope().

Definition at line 2062 of file qgsapplication.cpp.

◆ setDefaultSvgPaths()

void QgsApplication::setDefaultSvgPaths ( const QStringList & pathList )

static

Alters default svg paths - used by 3rd party apps.

Definition at line 685 of file qgsapplication.cpp.

◆ setFileOpenEventReceiver()

void QgsApplication::setFileOpenEventReceiver ( QObject * receiver )

static

Sets the FileOpen event receiver.

Definition at line 631 of file qgsapplication.cpp.

◆ setLocale()

void QgsApplication::setLocale ( const QLocale & locale )

static

Sets the QGIS locale - used mainly by 3rd party apps and tests.

In QGIS this is internally triggered by the application in startup.

Since: QGIS 3.22.2

Definition at line 1473 of file qgsapplication.cpp.

◆ setMaxThreads()

void QgsApplication::setMaxThreads ( int maxThreads )

static

Set maximum concurrent thread count.

Note: must be between 2 and #cores, -1 means use all available cores

Definition at line 2385 of file qgsapplication.cpp.

◆ setNullRepresentation()

void QgsApplication::setNullRepresentation ( const QString & nullRepresentation )

static

This string is used to represent the value NULL throughout QGIS.

In general, when passing values around, prefer to use a null QVariant QVariant( field.type() ) or QVariant( QVariant::Int ). This value should only be used in the final presentation step when showing values in a widget or sending it to a web browser.

Definition at line 2134 of file qgsapplication.cpp.

◆ setPkgDataPath()

void QgsApplication::setPkgDataPath ( const QString & pkgDataPath )

static

Alters pkg data path - used by 3rd party apps.

Definition at line 674 of file qgsapplication.cpp.

◆ setPluginPath()

void QgsApplication::setPluginPath ( const QString & pluginPath )

static

Alters plugin path - used by 3rd party apps.

Definition at line 669 of file qgsapplication.cpp.

◆ setPrefixPath()

void QgsApplication::setPrefixPath	(	const QString &	prefixPath,
		bool	useDefaultPaths = `false`
	)

static

Alters prefix path - used by 3rd party apps.

Definition at line 648 of file qgsapplication.cpp.

◆ setSkippedGdalDrivers()

void QgsApplication::setSkippedGdalDrivers	(	const QStringList &	skippedGdalDrivers,
		const QStringList &	deferredSkippedGdalDrivers
	)

static

Sets the list of gdal drivers that should be disabled (skippedGdalDrivers), but excludes for now the ones defines in deferredSkippedGdalDrivers.

This writes the "gdal/skipList" setting.

Since: QGIS 3.10

Definition at line 1954 of file qgsapplication.cpp.

◆ setSvgPaths()

void QgsApplication::setSvgPaths ( const QStringList & svgPaths )

static

Sets the paths to svg directories and invalidates the svg path list cache.

Since: QGIS 3.18

Definition at line 1229 of file qgsapplication.cpp.

◆ setThemeName()

void QgsApplication::setThemeName ( const QString & themeName )

static

Set the active theme to the specified theme.

The theme name should be a single word e.g. 'default','classic'. The theme search path usually will be pkgDataPath + "/themes/" + themName + "/" but plugin writers etc can use themeName() as a basis for searching for resources in their own datastores e.g. a Qt4 resource bundle.

Note: A basic test will be carried out to ensure the theme search path based on the supplied theme name exists. If it does not the theme name will be reverted to 'default'.

Definition at line 924 of file qgsapplication.cpp.

◆ settingsRegistryCore()

QgsSettingsRegistryCore * QgsApplication::settingsRegistryCore ( )

static

Returns the application's settings registry, used for managing application settings.

Since: QGIS 3.20

Deprecated:: since QGIS 3.30 use QgsSettings::treeRoot() instead

Definition at line 2414 of file qgsapplication.cpp.

◆ setTranslation()

void QgsApplication::setTranslation ( const QString & translation )

static

Set translation locale code.

Since: QGIS 3.4

Definition at line 2105 of file qgsapplication.cpp.

◆ setUITheme()

void QgsApplication::setUITheme ( const QString & themeName )

static

Set the current UI theme used to style the interface.

Use uiThemes() to find valid themes to use. Variables found in variables.qss will be added to the stylesheet on load.

Parameters

themeName The name of the theme.

Note: using an invalid theme name will reset to default

Definition at line 1015 of file qgsapplication.cpp.

◆ shortNameRegularExpression()

QRegularExpression QgsApplication::shortNameRegularExpression ( )

static

Returns the short name regular expression for line edit validator.

Note: This functionality was previously available as shortNameRegExp for QGIS <= 3.20

Since: QGIS 3.22

Definition at line 1287 of file qgsapplication.cpp.

◆ showSettings()

QString QgsApplication::showSettings ( )

static

Convenience function to get a summary of the paths used in this application instance useful for debugging mainly.

Definition at line 1607 of file qgsapplication.cpp.

◆ skipGdalDriver()

void QgsApplication::skipGdalDriver ( const QString & driver )

static

Sets the GDAL_SKIP environment variable to include the specified driver and then calls GDALDriverManager::AutoSkipDrivers() to unregister it.

The driver name should be the short format of the Gdal driver name e.g. GTIFF.

Definition at line 1925 of file qgsapplication.cpp.

◆ skippedGdalDrivers()

QStringList QgsApplication::skippedGdalDrivers ( )

static

Returns the list of gdal drivers that should be skipped (based on GDAL_SKIP environment variable)

Definition at line 1949 of file qgsapplication.cpp.

◆ sourceCache()

QgsSourceCache * QgsApplication::sourceCache ( )

static

Returns the application's source cache, used for caching embedded and remote source strings as local files.

Since: QGIS 3.16

Definition at line 2484 of file qgsapplication.cpp.

◆ splashPath()

QString QgsApplication::splashPath ( )

static

Returns the path to the splash screen image directory.

Definition at line 1196 of file qgsapplication.cpp.

◆ sponsorsFilePath()

QString QgsApplication::sponsorsFilePath ( )

static

Returns the path to the sponsors file.

Definition at line 1143 of file qgsapplication.cpp.

◆ srsDatabaseFilePath()

QString QgsApplication::srsDatabaseFilePath ( )

static

Returns the path to the srs.db file.

Definition at line 1206 of file qgsapplication.cpp.

◆ svgCache()

QgsSvgCache * QgsApplication::svgCache ( )

static

Returns the application's SVG cache, used for caching SVG images and handling parameter replacement within SVG files.

See also: imageCache()

Definition at line 2474 of file qgsapplication.cpp.

◆ svgPaths()

QStringList QgsApplication::svgPaths ( )

static

Returns the paths to svg directories.

Definition at line 1235 of file qgsapplication.cpp.

◆ symbol3DRegistry()

Qgs3DSymbolRegistry * QgsApplication::symbol3DRegistry ( )

static

Returns registry of available 3D symbols.

Since: QGIS 3.16

Definition at line 2619 of file qgsapplication.cpp.

◆ symbolLayerRegistry()

QgsSymbolLayerRegistry * QgsApplication::symbolLayerRegistry ( )

static

Returns the application's symbol layer registry, used for managing symbol layers.

Definition at line 2499 of file qgsapplication.cpp.

◆ systemEnvVars()

QMap< QString, QString > QgsApplication::systemEnvVars ( )

static

Returns the system environment variables passed to application.

Definition at line 1277 of file qgsapplication.cpp.

◆ systemMemorySizeMb()

int QgsApplication::systemMemorySizeMb ( )

static

Returns the size of the system memory (RAM) in megabytes.

This is only supported on some platforms, and will return -1 if not supported.

Since: QGIS 3.26

Definition at line 1394 of file qgsapplication.cpp.

◆ taskManager()

QgsTaskManager * QgsApplication::taskManager ( )

static

Returns the application's task manager, used for managing application wide background task handling.

Definition at line 2409 of file qgsapplication.cpp.

◆ themeName()

QString QgsApplication::themeName ( )

static

Set the active theme to the specified theme.

The theme name should be a single word e.g. 'default','classic'. The theme search path usually will be pkgDataPath + "/themes/" + themName + "/" but plugin writers etc can use this method as a basis for searching for resources in their own datastores e.g. a Qt4 resource bundle.

Definition at line 1010 of file qgsapplication.cpp.

◆ tileDownloadManager()

QgsTileDownloadManager * QgsApplication::tileDownloadManager ( )

static

Returns the application's tile download manager, used for download of map tiles when rendering.

Note: not available in Python bindings

Since: QGIS 3.18

Definition at line 2549 of file qgsapplication.cpp.

◆ tiledSceneRendererRegistry()

QgsTiledSceneRendererRegistry * QgsApplication::tiledSceneRendererRegistry ( )

static

Returns the application's tiled scene renderer registry, used for managing tiled scene layer 2D renderers.

Since: QGIS 3.34

Definition at line 2444 of file qgsapplication.cpp.

◆ translation()

QString QgsApplication::translation ( ) const

Returns the current application translation locale code.

See also: setTranslation()

Since: QGIS 3.22

Definition at line 2114 of file qgsapplication.cpp.

◆ translatorsFilePath()

QString QgsApplication::translatorsFilePath ( )

static

Returns the path to the sponsors file.

Definition at line 1153 of file qgsapplication.cpp.

◆ uiThemes()

QHash< QString, QString > QgsApplication::uiThemes ( )

static

All themes found in ~/.qgis3/themes folder.

The path is to the root folder for the theme

Returns: A hash of theme name and theme path. Valid theme folders contain style.qss

Note: Valid theme folders must contain a style.qss file.

Definition at line 1104 of file qgsapplication.cpp.

◆ userFullName()

QString QgsApplication::userFullName ( )

static

Returns the user's operating system login account full display name.

See also: userLoginName()

Definition at line 1333 of file qgsapplication.cpp.

◆ userLoginName()

QString QgsApplication::userLoginName ( )

static

Returns the user's operating system login account name.

See also: userFullName()

Definition at line 1293 of file qgsapplication.cpp.

◆ userStylePath()

QString QgsApplication::userStylePath ( )

static

Returns the path to user's style.

Definition at line 1282 of file qgsapplication.cpp.

◆ userThemesFolder()

QString QgsApplication::userThemesFolder ( )

static

Returns the path to user's themes folder.

Definition at line 1479 of file qgsapplication.cpp.

◆ validityCheckRegistry()

QgsValidityCheckRegistry * QgsApplication::validityCheckRegistry ( )

static

Returns the application's validity check registry, used for managing validity checks.

Since: QGIS 3.6

Definition at line 2494 of file qgsapplication.cpp.

Friends And Related Symbol Documentation

◆ TestQgsApplication

friend class TestQgsApplication

friend

Definition at line 1187 of file qgsapplication.h.

Member Data Documentation

◆ QGIS_APPLICATION_NAME

const char * QgsApplication::QGIS_APPLICATION_NAME = "QGIS3"

static

Definition at line 166 of file qgsapplication.h.

◆ QGIS_ORGANIZATION_DOMAIN

const char * QgsApplication::QGIS_ORGANIZATION_DOMAIN = "qgis.org"

static

Definition at line 165 of file qgsapplication.h.

◆ QGIS_ORGANIZATION_NAME

const char * QgsApplication::QGIS_ORGANIZATION_NAME = "QGIS"

static

Definition at line 164 of file qgsapplication.h.

◆ settingsLocaleGlobalLocale

const QgsSettingsEntryString * QgsApplication::settingsLocaleGlobalLocale = new QgsSettingsEntryString( QStringLiteral( "globalLocale" ), QgsSettingsTree::sTreeLocale, QString() )

static

Settings entry locale global locale.

Definition at line 1045 of file qgsapplication.h.

◆ settingsLocaleOverrideFlag

const QgsSettingsEntryBool * QgsApplication::settingsLocaleOverrideFlag = new QgsSettingsEntryBool( QStringLiteral( "overrideFlag" ), QgsSettingsTree::sTreeLocale, false )

static

Settings entry locale override flag.

Definition at line 1043 of file qgsapplication.h.

◆ settingsLocaleShowGroupSeparator

const QgsSettingsEntryBool * QgsApplication::settingsLocaleShowGroupSeparator = new QgsSettingsEntryBool( QStringLiteral( "showGroupSeparator" ), QgsSettingsTree::sTreeLocale, false )

static

Settings entry locale show group separator.

Definition at line 1047 of file qgsapplication.h.

◆ settingsLocaleUserLocale

const QgsSettingsEntryString * QgsApplication::settingsLocaleUserLocale = new QgsSettingsEntryString( QStringLiteral( "userLocale" ), QgsSettingsTree::sTreeLocale, QString() )

static

Settings entry locale user locale.

Definition at line 1041 of file qgsapplication.h.

◆ settingsSearchPathsForSVG

const QgsSettingsEntryStringList * QgsApplication::settingsSearchPathsForSVG = new QgsSettingsEntryStringList( QStringLiteral( "searchPathsForSVG" ), QgsSettingsTree::sTreeSvg, QStringList() )

static

Settings entry search path for SVG.

Definition at line 1049 of file qgsapplication.h.

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

/build/qgis-3.36.0+99sid/src/core/qgsapplication.h
/build/qgis-3.36.0+99sid/src/core/qgsapplication.cpp

Public Types

Signals

Public Member Functions

Static Public Member Functions

Static Public Attributes

Friends

Detailed Description

Member Enumeration Documentation

◆ Cursor

◆ endian_t

◆ StyleSheetType

Constructor & Destructor Documentation

◆ QgsApplication()

◆ ~QgsApplication()

Member Function Documentation

◆ absolutePathToRelativePath()

◆ actionScopeRegistry()

◆ activeThemePath()

◆ annotationItemRegistry()

◆ annotationRegistry()

◆ appIconPath()

◆ applicationFullName()

◆ applyGdalSkippedDrivers()

◆ authManager()

◆ authorsFilePath()

◆ bookmarkManager()

◆ buildOutputPath()

◆ buildSourcePath()

◆ calloutRegistry()

◆ classificationMethodRegistry()

◆ collectTranslatableObjects()

◆ colorSchemeRegistry()

◆ connectionRegistry()

◆ contributorsFilePath()

◆ coordinateReferenceSystemRegistry()

◆ createDatabase()

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◆ customVariables()

◆ customVariablesChanged

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◆ dataItemProviderRegistry()

◆ defaultStyleModel()

◆ defaultStylePath()

◆ defaultThemePath()

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◆ endian()

◆ event()

◆ exitQgis()

◆ externalStorageRegistry()

◆ fieldFormatterRegistry()

◆ fontManager()

◆ getThemeCursor()

◆ getThemeIcon()

◆ getThemePixmap()

◆ gpsBabelFormatRegistry()

◆ gpsConnectionRegistry()

◆ i18nPath()

◆ iconPath()

◆ iconsPath()

◆ imageCache()

◆ init()

◆ initQgis()

◆ instance()

◆ isRunningFromBuildDir()

◆ layerMetadataProviderRegistry()

◆ layoutItemRegistry()

◆ layoutTemplatePaths()

◆ libexecPath()

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◆ licenceFilePath()

◆ locale()

◆ localeChanged

◆ localizedDataPathRegistry()

◆ maxConcurrentConnectionsPerPool()

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◆ messageLog()

◆ metadataPath()