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...

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

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

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. More...

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

	~QgsApplication () override

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

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

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

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

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

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

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

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

static QString	appIconPath ()
	Gets application icon. More...

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

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

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

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

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

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

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

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

static bool	createThemeFolder ()
	Create the users theme folder. More...

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

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. More...

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

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

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

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

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

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

template<typename T >
static void	endian_swap (T &value)
	Swap the endianness of the specified value. More...

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

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

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

static QIcon	getThemeIcon (const QString &name)
	Helper to get a theme icon. More...

static QPixmap	getThemePixmap (const QString &name)
	Helper to get a theme icon as a pixmap. More...

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

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

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

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

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

static void	initQgis ()
	loads providers More...

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

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

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

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

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

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

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

static QString	locale ()
	Returns the QGIS locale. More...

static int	maxThreads ()
	Gets maximum concurrent thread count. More...

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

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

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

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

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

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

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

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

static QString	platform ()
	Returns the QGIS platform name, e.g., "desktop" or "server". More...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

static QString	reportStyleSheet ()
	Returns a standard css style sheet for reports. More...

static QString	resolvePkgPath ()
	Calculate the application pkg path. More...

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. More...

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

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

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

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

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

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

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

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

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

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

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

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

static void	setTranslation (const QString &translation)
	Set translation. More...

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

static QRegExp	shortNameRegExp ()
	Returns the short name regular expression for line edit validator. More...

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

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. More...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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"

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 68 of file qgsapplication.h.

Member Enumeration Documentation

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 331 of file qgsapplication.h.

enum QgsApplication::endian_t

Constants for endian-ness.

Enumerator
XDR
NDR

Definition at line 450 of file qgsapplication.h.

Constructor & Destructor Documentation

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

Definition at line 131 of file qgsapplication.cpp.

QgsApplication::~QgsApplication ( )

override

Definition at line 303 of file qgsapplication.cpp.

Member Function Documentation

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

static

Converts absolute path to path relative to target.

Definition at line 1356 of file qgsapplication.cpp.

QgsActionScopeRegistry * QgsApplication::actionScopeRegistry ( )

static

Returns the action scope registry.

Since: QGIS 3.0

Definition at line 1614 of file qgsapplication.cpp.

QString QgsApplication::activeThemePath ( )

static

Returns the path to the currently active theme directory.

Definition at line 499 of file qgsapplication.cpp.

QgsAnnotationRegistry * QgsApplication::annotationRegistry ( )

static

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

Note: not available in Python bindings

Since: QGIS 3.0

Definition at line 1920 of file qgsapplication.cpp.

QString QgsApplication::appIconPath ( )

static

Gets application icon.

Definition at line 514 of file qgsapplication.cpp.

void QgsApplication::applyGdalSkippedDrivers ( )

static

Apply the skipped drivers list to gdal.

See also: skipGdalDriver; restoreGdalDriver; skippedGdalDrivers

Definition at line 1495 of file qgsapplication.cpp.

QgsAuthManager * QgsApplication::authManager ( )

static

Returns the application's authentication manager instance.

Note: this can be a null pointer if called before initQgis

See also: initQgis

Since: QGIS 3.0

Definition at line 1172 of file qgsapplication.cpp.

QString QgsApplication::authorsFilePath ( )

static

Returns the path to the authors file.

Definition at line 843 of file qgsapplication.cpp.

static QString QgsApplication::buildOutputPath ( )

inlinestatic

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

Definition at line 516 of file qgsapplication.h.

static QString QgsApplication::buildSourcePath ( )

inlinestatic

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

Definition at line 514 of file qgsapplication.h.

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 1585 of file qgsapplication.cpp.

QgsColorSchemeRegistry * QgsApplication::colorSchemeRegistry ( )

static

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

Since: QGIS 3.0

Definition at line 1835 of file qgsapplication.cpp.

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 848 of file qgsapplication.cpp.

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

static

initialize qgis.db

Definition at line 1619 of file qgsapplication.cpp.

bool QgsApplication::createThemeFolder ( )

static

Create the users theme folder.

Definition at line 1505 of file qgsapplication.cpp.

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().

Since: QGIS 3.0

Definition at line 1536 of file qgsapplication.cpp.

void QgsApplication::customVariablesChanged ( )

signal

Emitted whenever a custom global variable changes.

Since: QGIS 3.0

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.

Since: QGIS 3.0

Definition at line 1855 of file qgsapplication.cpp.

QString QgsApplication::defaultStylePath ( )

static

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

Definition at line 1109 of file qgsapplication.cpp.

QString QgsApplication::defaultThemePath ( )

static

Returns the path to the default theme directory.

Definition at line 495 of file qgsapplication.cpp.

QString QgsApplication::defaultThemesFolder ( )

static

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

Definition at line 1114 of file qgsapplication.cpp.

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.

Since: QGIS 2.7

Definition at line 852 of file qgsapplication.cpp.

QString QgsApplication::donorsFilePath ( )

static

Returns the path to the donors file.

Definition at line 862 of file qgsapplication.cpp.

QgsApplication::endian_t QgsApplication::endian ( )

static

Returns whether this machine uses big or little endian.

Definition at line 1139 of file qgsapplication.cpp.

template<typename T >

static void QgsApplication::endian_swap ( T & value )

inlinestatic

Swap the endianness of the specified value.

Note: not available in Python bindings

Definition at line 465 of file qgsapplication.h.

bool QgsApplication::event ( QEvent * event )

override

Watch for QFileOpenEvent.

Definition at line 331 of file qgsapplication.cpp.

void QgsApplication::exitQgis ( )

static

deletes provider registry and map layer registry

Definition at line 1192 of file qgsapplication.cpp.

QgsFieldFormatterRegistry * QgsApplication::fieldFormatterRegistry ( )

static

Gets the registry of available field formatters.

Definition at line 1925 of file qgsapplication.cpp.

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 560 of file qgsapplication.cpp.

QIcon QgsApplication::getThemeIcon ( const QString & name )

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.

Definition at line 530 of file qgsapplication.cpp.

QPixmap QgsApplication::getThemePixmap ( const QString & name )

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.

Definition at line 625 of file qgsapplication.cpp.

QgsGpsConnectionRegistry * QgsApplication::gpsConnectionRegistry ( )

static

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

Since: QGIS 3.0

Definition at line 1895 of file qgsapplication.cpp.

QString QgsApplication::i18nPath ( )

static

Returns the path to the translation directory.

Definition at line 877 of file qgsapplication.cpp.

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 519 of file qgsapplication.cpp.

QString QgsApplication::iconsPath ( )

static

Returns the path to the icons image directory.

Definition at line 915 of file qgsapplication.cpp.

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 169 of file qgsapplication.cpp.

void QgsApplication::initQgis ( )

static

loads providers

Definition at line 1144 of file qgsapplication.cpp.

QgsApplication * QgsApplication::instance ( )

static

Returns the singleton instance of the QgsApplication.

Since: QGIS 3.0

Definition at line 326 of file qgsapplication.cpp.

static bool QgsApplication::isRunningFromBuildDir ( )

inlinestatic

Indicates whether running from build directory (not installed)

Definition at line 509 of file qgsapplication.h.

QgsLayoutItemRegistry * QgsApplication::layoutItemRegistry ( )

static

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

Since: QGIS 3.0

Definition at line 1890 of file qgsapplication.cpp.

QStringList QgsApplication::layoutTemplatePaths ( )

static

Returns the paths to layout template directories.

Since: QGIS 3.0

Definition at line 966 of file qgsapplication.cpp.

QString QgsApplication::libexecPath ( )

static

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

Definition at line 1129 of file qgsapplication.cpp.

QString QgsApplication::libraryPath ( )

static

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

Definition at line 1124 of file qgsapplication.cpp.

QString QgsApplication::licenceFilePath ( )

static

Returns the path to the licence file.

Definition at line 872 of file qgsapplication.cpp.

QString QgsApplication::locale ( )

static

Returns the QGIS locale.

Since: QGIS 3.0

Definition at line 1083 of file qgsapplication.cpp.

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 1580 of file qgsapplication.cpp.

static int QgsApplication::maxThreads ( )

inlinestatic

Gets maximum concurrent thread count.

Since: QGIS 2.4

Definition at line 548 of file qgsapplication.h.

QgsMessageLog * QgsApplication::messageLog ( )

static

Returns the application's message log.

Since: QGIS 3.0

Definition at line 1905 of file qgsapplication.cpp.

QString QgsApplication::metadataPath ( )

static

Returns the path to the metadata directory.

Since: QGIS 3.0

Definition at line 885 of file qgsapplication.cpp.

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 1880 of file qgsapplication.cpp.

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

override

Catch exceptions when sending event to receiver.

Definition at line 359 of file qgsapplication.cpp.

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 1590 of file qgsapplication.cpp.

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.

QString QgsApplication::osName ( )

static

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

See also: platform()

Since: QGIS 2.14

Definition at line 1055 of file qgsapplication.cpp.

QgsPageSizeRegistry * QgsApplication::pageSizeRegistry ( )

static

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

Since: QGIS 3.0

Definition at line 1915 of file qgsapplication.cpp.

QgsPaintEffectRegistry * QgsApplication::paintEffectRegistry ( )

static

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

Since: QGIS 3.0

Definition at line 1840 of file qgsapplication.cpp.

QString QgsApplication::pkgDataPath ( )

static

Returns the common root path of all application data directories.

Definition at line 488 of file qgsapplication.cpp.

QString QgsApplication::platform ( )

static

Returns the QGIS platform name, e.g., "desktop" or "server".

See also: osName()

Since: QGIS 2.14

Definition at line 1078 of file qgsapplication.cpp.

QgsPluginLayerRegistry * QgsApplication::pluginLayerRegistry ( )

static

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

Since: QGIS 3.0

Definition at line 1900 of file qgsapplication.cpp.

QString QgsApplication::pluginPath ( )

static

Returns the path to the application plugin directory.

Definition at line 484 of file qgsapplication.cpp.

QString QgsApplication::prefixPath ( )

static

Returns the path to the application prefix directory.

Definition at line 468 of file qgsapplication.cpp.

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

signal

Note: not available in Python bindings

QgsProcessingRegistry * QgsApplication::processingRegistry ( )

static

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

Since: QGIS 3.0

Definition at line 1910 of file qgsapplication.cpp.

QgsRuntimeProfiler * QgsApplication::profiler ( )

static

Returns the application runtime profiler.

Since: QGIS 3.0

Definition at line 397 of file qgsapplication.cpp.

QgsProjectStorageRegistry * QgsApplication::projectStorageRegistry ( )

static

Returns registry of available project storage implementations.

Since: QGIS 3.2

Definition at line 1935 of file qgsapplication.cpp.

QString QgsApplication::qgisAuthDatabaseFilePath ( )

static

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

Definition at line 905 of file qgsapplication.cpp.

QString QgsApplication::qgisMasterDatabaseFilePath ( )

static

Returns the path to the master qgis.db file.

Definition at line 890 of file qgsapplication.cpp.

QString QgsApplication::qgisSettingsDirPath ( )

static

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

Definition at line 895 of file qgsapplication.cpp.

QString QgsApplication::qgisUserDatabaseFilePath ( )

static

Returns the path to the user qgis.db file.

Definition at line 900 of file qgsapplication.cpp.

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 1134 of file qgsapplication.cpp.

QgsRasterRendererRegistry * QgsApplication::rasterRendererRegistry ( )

static

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

Note: not available in Python bindings

Since: QGIS 3.0

Definition at line 1850 of file qgsapplication.cpp.

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 1348 of file qgsapplication.cpp.

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

static

Converts path relative to target to an absolute path.

Definition at line 1421 of file qgsapplication.cpp.

Qgs3DRendererRegistry * QgsApplication::renderer3DRegistry ( )

static

Returns registry of available 3D renderers.

Since: QGIS 3.0

Definition at line 1930 of file qgsapplication.cpp.

QgsRendererRegistry * QgsApplication::rendererRegistry ( )

static

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

Since: QGIS 3.0

Definition at line 1845 of file qgsapplication.cpp.

QString QgsApplication::reportStyleSheet ( )

static

Returns a standard css style sheet for reports.

Typically you will use this method by doing: QString myStyle = QgsApplication::reportStyleSheet(); textBrowserReport->document()->setDefaultStyleSheet(myStyle);

Returns: QString containing the CSS 2.1 compliant stylesheet.

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

Definition at line 1248 of file qgsapplication.cpp.

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

QString QgsApplication::resolvePkgPath ( )

static

Calculate the application pkg path.

Returns: the resolved pkg path

Definition at line 646 of file qgsapplication.cpp.

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 1481 of file qgsapplication.cpp.

QString QgsApplication::serverResourcesPath ( )

static

Returns the path to the server resources directory.

Definition at line 1119 of file qgsapplication.cpp.

void QgsApplication::setAuthDatabaseDirPath ( const QString & authDbDirPath )

static

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

Definition at line 459 of file qgsapplication.cpp.

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

static

Set a single custom expression variable.

Since: QGIS 3.0

Definition at line 1570 of file qgsapplication.cpp.

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().

Since: QGIS 3.0

Definition at line 1555 of file qgsapplication.cpp.

void QgsApplication::setDefaultSvgPaths ( const QStringList & pathList )

static

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

Definition at line 454 of file qgsapplication.cpp.

void QgsApplication::setFileOpenEventReceiver ( QObject * receiver )

static

Sets the FileOpen event receiver.

Definition at line 402 of file qgsapplication.cpp.

void QgsApplication::setMaxThreads ( int maxThreads )

static

Set maximum concurrent thread count.

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

Since: QGIS 2.4

Definition at line 1809 of file qgsapplication.cpp.

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 1600 of file qgsapplication.cpp.

void QgsApplication::setPkgDataPath ( const QString & pkgDataPath )

static

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

Definition at line 445 of file qgsapplication.cpp.

void QgsApplication::setPluginPath ( const QString & pluginPath )

static

Alters plugin path - used by 3rd party apps.

Definition at line 440 of file qgsapplication.cpp.

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

static

Alters prefix path - used by 3rd party apps.

Definition at line 419 of file qgsapplication.cpp.

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 641 of file qgsapplication.cpp.

static void QgsApplication::setTranslation ( const QString & translation )

inlinestatic

Set translation.

Since: QGIS 3.4

Definition at line 751 of file qgsapplication.h.

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 731 of file qgsapplication.cpp.

QRegExp QgsApplication::shortNameRegExp ( )

static

Returns the short name regular expression for line edit validator.

Definition at line 981 of file qgsapplication.cpp.

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 1221 of file qgsapplication.cpp.

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 1471 of file qgsapplication.cpp.

static QStringList QgsApplication::skippedGdalDrivers ( )

inlinestatic

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

Definition at line 536 of file qgsapplication.h.

QString QgsApplication::splashPath ( )

static

Returns the path to the splash screen image directory.

Definition at line 910 of file qgsapplication.cpp.

QString QgsApplication::sponsorsFilePath ( )

static

Returns the path to the sponsors file.

Definition at line 857 of file qgsapplication.cpp.

QString QgsApplication::srsDatabaseFilePath ( )

static

Returns the path to the srs.db file.

Definition at line 920 of file qgsapplication.cpp.

QgsSvgCache * QgsApplication::svgCache ( )

static

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

Since: QGIS 3.0

Definition at line 1875 of file qgsapplication.cpp.

QStringList QgsApplication::svgPaths ( )

static

Returns the paths to svg directories.

Definition at line 943 of file qgsapplication.cpp.

QgsSymbolLayerRegistry * QgsApplication::symbolLayerRegistry ( )

static

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

Since: QGIS 3.0

Definition at line 1885 of file qgsapplication.cpp.

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

inlinestatic

Returns the system environment variables passed to application.

Definition at line 298 of file qgsapplication.h.

QgsTaskManager * QgsApplication::taskManager ( )

static

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

Since: QGIS 3.0

Definition at line 1830 of file qgsapplication.cpp.

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 726 of file qgsapplication.cpp.

QString QgsApplication::translatorsFilePath ( )

static

Returns the path to the sponsors file.

Definition at line 867 of file qgsapplication.cpp.

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 820 of file qgsapplication.cpp.

QString QgsApplication::userFullName ( )

static

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

See also: userLoginName()

Since: QGIS 2.14

Definition at line 1021 of file qgsapplication.cpp.

QString QgsApplication::userLoginName ( )

static

Returns the user's operating system login account name.

See also: userFullName()

Since: QGIS 2.14

Definition at line 986 of file qgsapplication.cpp.

QString QgsApplication::userStylePath ( )

static

Returns the path to user's style.

Definition at line 976 of file qgsapplication.cpp.

QString QgsApplication::userThemesFolder ( )

static

Returns the path to user's themes folder.

Definition at line 1104 of file qgsapplication.cpp.

Member Data Documentation

const char * QgsApplication::QGIS_APPLICATION_NAME = "QGIS3"

static

Definition at line 125 of file qgsapplication.h.

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

static

Definition at line 124 of file qgsapplication.h.

const char * QgsApplication::QGIS_ORGANIZATION_NAME = "QGIS"

static

Definition at line 123 of file qgsapplication.h.

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

/build/qgis-3.4.15+24xenial/src/core/qgsapplication.h
/build/qgis-3.4.15+24xenial/src/core/qgsapplication.cpp

Public Types

Signals

Public Member Functions

Static Public Member Functions

Static Public Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation