QGIS API Documentation  2.99.0-Master (53aba61)
Class Hierarchy

Go to the graphical class hierarchy

This inheritance list is sorted roughly, but not completely, alphabetically:
[detail level 12345]
 C_LayerRef< TYPE >Internal structure to keep weak pointer to QgsMapLayer or layerId if the layer is not available yet
 C_LayerRef< QgsMapLayer >
 C_LayerRef< QgsVectorLayer >
 C_nmeaGPGGAGGA packet information structure (Global Positioning System Fix Data)
 C_nmeaGPGSAGSA packet information structure (Satellite status)
 C_nmeaGPGSVGSV packet information structure (Satellites in view)
 C_nmeaGPRMCRMC packet information structure (Recommended Minimum sentence C)
 C_nmeaGPVTGVTG packet information structure (Track made good and ground speed)
 C_nmeaINFOSummary GPS information from all parsed packets, used also for generating NMEA stream
 C_nmeaPOSPosition data in fractional degrees or radians
 C_nmeaSATELLITEInformation about satellite
 C_nmeaSATINFOInformation about all satellites in view
 C_nmeaTIMEDate and time data
 CQgsLayerMetadata::AddressMetadata address structure
 CQgsAggregateCalculator::AggregateParametersA bundle of parameters controlling aggregate calculation
 CQgsUnitTypes::AreaValueA combination of area value and unit
 CQgsSQLComposerDialog::ArgumentArgument of a function
 CQgsAdvancedDigitizingDockWidget::CadConstraintThe CadConstraint is an abstract class for all basic constraints (angle/distance/x/y)
 CQgsMapCanvas::CanvasPropertiesDeprecated to be deleted, stuff from here should be moved elsewhere
 CQgsPalettedRasterRenderer::ClassProperties of a single value class
 CQgsAttributeTableConfig::ColumnConfigDefines the configuration of a column in the attribute table
 CQgsLayerMetadata::ConstraintMetadata constraint structure
 CQgsLayerMetadata::ContactMetadata contact structure
 CQgsLayerDefinition::DependencySorterClass used to work with layer dependencies stored in a XML project or layer definition file
 CQgsImageOperation::DistanceTransformPropertiesStruct for storing properties of a distance transform operation
 CQgsUnitTypes::DistanceValueA combination of distance value and unit
 CQgsEllipsoidUtils::EllipsoidDefinitionContains definition of an ellipsoid
 CQgsEllipsoidUtils::EllipsoidParametersContains parameters for an ellipsoid
 CQgsLayerMetadata::ExtentMetadata extent structure
 Cpal::FeatsFor usage in problem solving algorithm
 CQgsVectorLayerFeatureIterator::FetchJoinInfoJoin information prepared for fast attribute id mapping in QgsVectorLayerJoinBuffer::updateFeatureAttributes()
 CQgsVectorFileWriter::FieldValueConverterInterface to convert raw field values to their user-friendly value
 CQgsSQLComposerDialog::FunctionDescription of server functions
 CGEOSGeomScopedPtrScoped GEOS pointer
 CQgsPointDistanceRenderer::GroupedFeatureContains properties for a feature within a clustered group
 CQgsSnappingConfig::IndividualLayerSettingsThis is a container of advanced configuration (per layer) of the snapping of the project
 Cpal::InternalExceptionVarious Exceptions
 CQgsAlignRaster::ItemDefinition of one raster layer for alignment
 CQgsConnectionPoolGroup< T >::Item
 Cpal::LabelInfoOptional additional info about label (for curved labels)
 Cpal::LayerA set of features which influence the labeling process
 CQgsSnappingUtils::LayerConfigConfigures how a certain layer should be handled in a snapping operation
 CQgsInterpolator::LayerDataA layer together with the information about interpolation attribute / z-coordinate interpolation and the type (point, structure line, breakline)
 CQgsSublayersDialog::LayerDefinitionA structure that defines layers for the purpose of this dialog
 CQgsProcessingContext::LayerDetailsDetails for layers to load into projects
 CQgsLayerTreeModel::LayerLegendDataStructure that stores all data associated with one map layer
 CQgsLayerTreeModel::LayerLegendTreeStructure that stores tree representation of map layer's legend
 CQgsAccessControlFilter::LayerPermissionsDescribe the layer permission
 CQgsGmlStreamingParser::LayerPropertiesLayer properties
 CQgsOgcUtils::LayerPropertiesLayer properties
 CLine3DThis class represents a line
 CQgsLayerMetadata::LinkMetadata link structure
 CQgsMapThemeCollection::MapThemeLayerRecordIndividual record of a visible layer in a map theme record
 CQgsMapThemeCollection::MapThemeRecordIndividual map theme record of visible layers and styles
 CQgsPointLocator::MatchFilterInterface that allows rejection of some matches in intersection queries (e.g
 CQgsSQLStatement::NodeAbstract node class
 CNodeNode is a class used by Line3D
 CQgsSQLStatement::NodeListList of nodes
 CQgsFeatureRequest::OrderByClauseOrder by clause for a QgsFeatureRequest
 Cpal::PalMain Pal labeling class
 Cpal::PalExceptionVarious Exceptions
 Cpal::PalStatSummary statistics of labeling problem
 CQgsKernelDensityEstimation::ParametersKDE parameters
 CParametricLineParametricLine is an Interface for parametric lines
 Cpal::PolygonCostCalculatorData structure to compute polygon's candidates costs
 Cpal::ProblemRepresentation of a labeling problem
 CQgsAlignRaster::ProgressHandlerHelper struct to be sub-classed for progress reporting
 CQgisGlobal constants for use throughout the application
 CQgisPluginAbstract base class from which all plugins must inherit
 CQgsAbstractCacheIndexAbstract base class for cache indices
 CQgsAbstractFeatureIteratorInternal feature iterator to be implemented within data providers
 CQgsAbstractFeatureSourceBase class that can be used for any class that is capable of returning features
 CQgsAbstractGeometryAbstract base class for all geometries
 CQgsAbstractGeometrySimplifierAbstract base class for simplify geometries using a specific algorithm
 CQgsAbstractLabelProviderInterface class
 CQgsAbstractPropertyCollectionAbstract base class for QgsPropertyCollection like objects
 CQgsAbstractVectorLayerLabelingAbstract base class - its implementations define different approaches to the labeling of a vector layer
 CQgsAccessControlFilterClass defining access control interface for QGIS Server plugins
 CQgsActionUtility class that encapsulates an action based on vector attributes
 CQgsActionScopeAn action scope defines a "place" for an action to be shown and may add additional expression variables
 CQgsAggregateCalculatorUtility class for calculating aggregates for a field (or expression) over the features from a vector layer
 CQgsAlignRasterQgsAlignRaster takes one or more raster layers and warps (resamples) them so they have the same:
 CQgsArchiveClass allowing to manage the zip/unzip actions
 CQgsAttributeEditorContextThis class contains context information for attribute editor widgets
 CQgsAttributeEditorElementThis is an abstract base class for any elements of a drag and drop form
 CQgsAttributeTableConfigThis is a container for configuration of the attribute table
 CQgsAuthCertUtilsUtilities for working with certificates and keys
 CQgsAuthConfigSslServerConfiguration container for SSL server connection exceptions or overrides
 CQgsAuthCryptoFunctions for hashing/checking master password and encrypt/decrypting data with password
 CQgsAuthGuiUtilsUtility functions for use by authentication GUI widgets or standalone apps
 CQgsAuthMethodConfigConfiguration storage class for authentication method configurations
 CQgsAuthMethodMetadataHolds data auth method key, description, and associated shared library file information
 CQgsAuthMethodRegistryA registry / canonical manager of authentication methods
 CQgsBearingUtilsUtilities for calculating bearings and directions
 CQgsBox3dA 3-dimensional box composed of x, y, z coordinates
 CQgsClipperA class to trim lines and polygons to within a rectangular region
 CQgsColorRampAbstract base class for color ramps
 CQgsColorSchemeAbstract base class for color schemes
 CQgsColorSchemeRegistryRegistry of color schemes
 CQgsComposerAttributeTableCompareV2Helper class for sorting tables, takes into account sorting column and ascending / descending
 CQgsComposerMapItemStackA collection of map items which are drawn above the map content in a QgsComposerMap
 CQgsComposerTableStyleStyling option for a composer table cell
 CQgsComposerUtilsUtilities for compositions
 CQgsConditionalLayerStylesHolds conditional style information for a layer
 CQgsConditionalStyleConditional styling for a rule
 CQgsConnectionPool< T, T_Group >Template class responsible for keeping a pool of open connections
 CQgsConnectionPoolGroup< T >Template that stores data related to one server
 CQgsContrastEnhancementManipulates raster pixel values so that they enhanceContrast or clip into a specified numerical range according to the specified ContrastEnhancementAlgorithm
 CQgsContrastEnhancementFunctionA contrast enhancement function is the base class for all raster contrast enhancements
 CQgsCoordinateReferenceSystemThis class represents a coordinate reference system (CRS)
 CQgsCoordinateTransformClass for doing transforms between two map coordinate systems
 CQgsCoordinateTransformCacheCache coordinate transform by authid of source/dest transformation to avoid the overhead of initialization for each redraw
 CQgsCredentialsInterface for requesting credentials in QGIS in GUI independent way
 CQgsCurveTransformHandles scaling of input values to output values by using a curve created from smoothly joining a number of set control points
 CQgsDataDefinedSizeLegendObject that keeps configuration of appearance of marker symbol's data-defined size in legend
 CQgsDataItemProviderThis is the interface for those who want to add custom data items to the browser tree
 CQgsDataItemProviderRegistryThis class keeps a list of data item providers that may add items to the browser tree
 CQgsDataSourceUriClass for storing the component parts of a PostgreSQL/RDBMS datasource URI
 CQgsDateTimeStatisticalSummaryCalculator for summary statistics and aggregates for a list of datetimes
 CQgsDatumTransformStoreKeeps track of datum transformations as chosen by the user
 CQgsDetailedItemDataThis class is the data only representation of a QgsDetailedItemWidget, designed to be used in custom views
 CQgsDiagramBase class for all diagram types
 CQgsDiagramInterpolationSettingsAdditional diagram settings for interpolated size rendering
 CQgsDiagramLayerSettingsStores the settings for rendering of all diagrams for a layer
 CQgsDiagramRendererEvaluates and returns the diagram settings relating to a diagram for a specific feature
 CQgsDiagramSettingsStores the settings for rendering a single diagram
 CQgsDistanceAreaA general purpose distance and area calculator, capable of performing ellipsoid based calculations
 CQgsEditorWidgetAutoConfPluginBase class for plugins allowing to pick automatically a widget type for editing fields
 CQgsEditorWidgetFactoryEvery attribute editor widget needs a factory, which inherits this class
 CQgsEditorWidgetSetupHolder for the widget type and its configuration for a field
 CQgsEffectPainterA class to manager painter saving and restoring required for effect drawing
 CQgsEllipseEllipse geometry type
 CQgsEllipsoidUtilsContains utility functions for working with ellipsoids and querying the ellipsoid database
 CQgsErrorQgsError is container for error messages (report)
 CQgsErrorMessageQgsErrorMessage represents single error message
 CQgsExceptionDefines a QGIS exception class
 CQgsExpressionContextExpression contexts are used to encapsulate the parameters around which a QgsExpression should be evaluated
 CQgsExpressionContextGeneratorAbstract interface for generating an expression context
 CQgsExpressionContextScopeSingle scope for storing variables and functions for use within a QgsExpressionContext
 CQgsExpressionContextUtilsContains utilities for working with QgsExpressionContext objects, including methods for creating scopes for specific uses (e.g., project scopes, layer scopes)
 CQgsExpressionFieldBufferBuffers information about expression fields for a vector layer
 CQgsFeatureThe feature class encapsulates a single feature including its id, geometry and a list of field/values attributes
 CQgsFeatureFilterProviderAbstract interface for use by classes that filter the features of a layer
 CQgsFeatureIteratorWrapper for iterator of features from vector data provider or vector layer
 CQgsFeatureRequestThis class wraps a request for features to a vector layer (or directly its vector data provider)
 CQgsFeatureSinkAn interface for objects which accept features via addFeature(s) methods
 CQgsFeatureSourceAn interface for objects which provide features via a getFeatures method
 CQgsFieldEncapsulate a field in an attribute table or data source
 CQgsFieldConstraintsStores information about constraints which may be present on a field
 CQgsFieldFormatterA field formatter helps to handle and display values for a field
 CQgsFieldsContainer of fields for a vector layer
 CQgsGeometryA geometry is the spatial representation of a feature
 CQgsGeometryEditUtilsConvenience functions for geometry editing
 CQgsGeometryEngineContains geometry relation and modification algorithms
 CQgsGeometryFactoryContains geometry creation routines
 CQgsGeometryUtilsContains various geometry utility functions
 CQgsGeoNodeConnectionEncapsulates settings related to a single GeoNode connection
 CQgsGeoNodeConnectionUtilsContains various utilities for managing the known collection of GeoNode servers associated with a QGIS install
 CQgsGeoNodeStyleEncapsulates information about a GeoNode layer style
 CQgsGmlFeatureClassDescription of feature class in GML
 CQgsGmlStreamingParserThis class builds features from GML data in a streaming way
 CQgsGPSConnectionRegistryA class to register / unregister existing GPS connections such that the information is available to all classes and plugins
 CQgsGradientStopRepresents a color stop within a QgsGradientColorRamp color ramp
 CQgsGraphMathematical graph representation
 CQgsGraphAnalyzerThis class performs graph analysis, e.g
 CQgsGraphBuilderInterfaceDetermine interface for creating a graph
 CQgsGraphEdgeThis class implements a graph edge
 CQgsGraphVertexThis class implements a graph vertex
 CQgsGridFileWriterA class that does interpolation to a grid and writes the results to an ascii grid
 CQgsGuiQgsGui is a singleton class containing various registry and other global members related to GUI classes
 CQgsHelpHelper class for showing help topic URI for the given key
 CQgsHistogramCalculator for a numeric histogram from a list of values
 CQgsImageOperationContains operations and filters which apply to QImages
 CQgsIndexedFeatureTemporarily used structure to cache order by information
 CQgsInternalGeometryEngineThis class offers geometry processing methods
 CQgsInternalGeometrySnapperQgsInternalGeometrySnapper allows a set of geometries to be snapped to each other
 CQgsInterpolatorInterface class for interpolations
 CQgsInterruptionCheckerInterface that can be optionally attached to an iterator so its nextFeature() implementaton can check if it must stop as soon as possible
 CQgsIntervalA representation of the interval between two datetime values
 CQgsJsonExporterHandles exporting QgsFeature features to GeoJSON features
 CQgsJsonUtilsHelper utilities for working with JSON and GeoJSON conversions
 CQgsKernelDensityEstimationPerforms Kernel Density Estimation ("heatmap") calculations on a vector layer
 CQgsLabelFeatureDescribes a feature that should be used within the labeling engine
 CQgsLabelingEngineMap labeling functionality
 CQgsLabelingEngineSettingsStores global configuration for labeling engine
 CQgsLabelingResultsClass that stores computed placement from labeling engine
 CQgsLabelingUtilsContains helper utilities for working with QGIS' labeling engine
 CQgsLabelSearchTreeA class to query the labeling structure at a given point (small wraper around pal RTree class)
 CQgsLabelSorterHelper class for sorting labels into correct draw order
 CQgsLayerDefinitionHolds generic methods for loading/exporting QLR files
 CQgsLayerMetadataA structured metadata store for a map layer
 CQgsLayerMetadataFormatterClass for metadata formatter
 CQgsLayerTreeEmbeddedWidgetProviderProvider interface to be implemented in order to introduce new kinds of embedded widgets for use in layer tree
 CQgsLayerTreeEmbeddedWidgetRegistryRegistry of widgets that may be embedded into layer tree view
 CQgsLayerTreeUtilsAssorted functions for dealing with layer trees
 CQgsLayerTreeViewMenuProviderImplementation of this interface can be implemented to allow QgsLayerTreeView instance to provide custom context menus (opened upon right-click)
 CQgsLayoutContextStores information relating to the current context and rendering settings for a layout
 CQgsLayoutItemAbstractMetadataStores metadata about one layout item class
 CQgsLayoutMeasurementThis class provides a method of storing measurements for use in QGIS layouts using a variety of different measurement units
 CQgsLayoutMeasurementConverterThis class provides a method of converting QgsLayoutMeasurements from one unit to another
 CQgsLayoutPointThis class provides a method of storing points, consisting of an x and y coordinate, for use in QGIS layouts
 CQgsLayoutSizeThis class provides a method of storing sizes, consisting of a width and height, for use in QGIS layouts
 CQgsLayoutUndoObjectInterfaceInterface for layout objects which support undo/redo commands
 CQgsLayoutUndoStackAn undo stack for QgsLayouts
 CQgsLayoutUtilsUtilities for layouts
 CQgsLegendRendererHandles automatic layout and rendering of legend
 CQgsLegendSettingsStores the appearance and layout settings for legend drawing with QgsLegendRenderer
 CQgsLegendStyleComposer legend components style
 CQgsLegendSymbolItemThe class stores information about one class/rule of a vector layer renderer in a unified way that can be used by legend model for rendering of legend
 CQgsLocatorContextEncapsulates the properties relating to the context of a locator search
 CQgsLocatorResultEncapsulates properties of an individual matching result found by a QgsLocatorFilter
 CQgsLoggerQgsLogger is a class to print debug/warning/error messages to the console
 CQgsMapDecorationInterface for map decorations
 CQgsMapHitTestClass that runs a hit test with given map settings
 CQgsMapLayerDependencyThis class models dependencies with or between map layers
 CQgsMapLayerLegendUtilsMiscellaneous utility functions for handling of map layer legend
 CQgsMapLayerRendererBase class for utility classes that encapsulate information necessary for rendering of map layers
 CQgsMapLayerStyleStores style information (renderer, opacity, labeling, diagrams etc.) applicable to a map layer
 CQgsMapSettingsConfiguration for rendering of the map
 CQgsMapSettingsUtilsUtilities for map settings
 CQgsMapToPixelPerform transforms between map coordinates and device coordinates
 CQgsMapUnitScaleStruct for storing maximum and minimum scales for measurements in map units
 CQgsMarginsDefines the four margins of a rectangle
 CQgsMemoryProviderUtilsUtility functions for use with the memory vector data provider
 CQgsMessageOutputInterface for showing messages from QGIS in GUI independent way
 CQgsMetadataValidatorAbstract base class for metadata validators
 CQgsMultiRenderCheckerThis class allows checking rendered images against comparison images
 CQgsNetworkStrategyQgsNetworkStrategy defines strategy used for calculation of the edge cost. For example it can take into account travel distance, amount of time or money. Currently there are two strategies implemented in the analysis library: QgsNetworkDistanceStrategy and QgsNetworkSpeedStrategy. QgsNetworkStrategy implemented using "strategy" design pattern
 CQgsNineCellFilterBase class for raster analysis methods that work with a 3x3 cell filter and calculate the value of each cell based on the cell value and the eight neighbour cells
 CQgsObjectCustomPropertiesSimple key-value store (keys = strings, values = variants) that supports loading/saving to/from XML in
 CQgsOgcUtilsVarious utility functions for conversion between OGC (Open Geospatial Consortium) standards and QGIS internal representations
 CQgsOgcUtilsExprToFilterInternal use by QgsOgcUtils
 CQgsOgcUtilsSQLStatementToFilterInternal use by QgsOgcUtils
 CQgsOgrUtilsUtilities for working with OGR features and layers
 CQgsOptional< T >QgsOptional is a container for other classes and adds an additional enabled/disabled flag
 CQgsOptional< QgsExpression >
 CQgsOSMDatabaseClass that encapsulates access to OpenStreetMap data stored in a database previously imported from XML file
 CQgsOSMElementElements (also data primitives) are the basic components in OpenStreetMap from which everything else is defined
 CQgsOSMNodeIteratorEncapsulate iteration over table of nodes/
 CQgsOSMTagsThis class is a container of tags for a node, way or a relation
 CQgsOSMWayIteratorEncapsulate iteration over table of ways
 CQgsPageSizeA named page size for layouts
 CQgsPageSizeRegistryA registry for known page sizes
 CQgsPaintEffectBase class for visual effects which can be applied to QPicture drawings
 CQgsPaintEffectAbstractMetadataStores metadata about a paint effect class
 CQgsPaintEffectRegistryRegistry of available paint effects
 CQgsPaintingMisc painting enums and functions
 CQgsPathResolverResolves relative paths into absolute paths and vice versa
 CQgsPkiBundleStorage set for PKI bundle: SSL certificate, key, optional CA cert chain
 CQgsPkiConfigBundleStorage set for constructed SSL certificate, key, associated with an authentication config
 CQgsPluginLayerRegistryA registry of plugin layers types
 CQgsPluginLayerTypeClass for creating plugin specific layers
 CQgsPointXYA class to represent a 2D point
 CQgsProcessingContains enumerations and other constants for use in processing algorithms and parameters
 CQgsProcessingAlgorithmAbstract base class for processing algorithms
 CQgsProcessingContextContains information about the context in which a processing algorithm is executed
 CQgsProcessingFeatureSourceDefinitionEncapsulates settings relating to a feature source input to a processing algorithm
 CQgsProcessingOutputDefinitionBase class for the definition of processing outputs
 CQgsProcessingOutputLayerDefinitionEncapsulates settings relating to a feature sink or output raster layer for a processing algorithm
 CQgsProcessingParameterDefinitionBase class for the definition of processing parameters
 CQgsProcessingParameterLimitedDataTypesCan be inherited by parameters which require limits to their acceptable data types
 CQgsProcessingParametersA collection of utilities for working with parameters when running a processing algorithm
 CQgsProcessingUtilsUtility functions for use with processing classes
 CQgsProjectBadLayerHandlerInterface for classes that handle missing layer files when reading project file
 CQgsProjectPropertyAn Abstract Base Class for QGIS project property hierarchys
 CQgsProjectVersionA class to describe the version of a project
 CQgsPropertyA store for object properties
 CQgsPropertyDefinitionDefinition for a property
 CQgsPropertyTransformerAbstract base class for objects which transform the calculated value of a property
 CQgsProviderMetadataHolds data provider key, description, and associated shared library file or function pointer information
 CQgsProviderRegistryA registry / canonical manager of data providers
 CQgsPythonRunnerUtility class for running Python commands from various parts of QGIS
 CQgsRange< T >A template based class for storing ranges (lower to upper values)
 CQgsRasterRaster namespace
 CQgsRasterBandStatsThe RasterBandStats struct is a container for statistics about a single raster band
 CQgsRasterBlockRaster data container
 CQgsRasterCalculatorRaster calculator class
 CQgsRasterCheckerThis is a helper class for unit tests that need to write an image and compare it to an expected result or render time
 CQgsRasterDrawerThe drawing pipe for raster layers
 CQgsRasterFileWriterThe raster file writer which allows you to save a raster to a new file
 CQgsRasterHistogramThe QgsRasterHistogram is a container for histogram of a single raster band
 CQgsRasterIdentifyResultRaster identify results container
 CQgsRasterInterfaceBase class for processing filters like renderers, reprojector, resampler etc
 CQgsRasterIteratorIterator for sequentially processing raster cells
 CQgsRasterMinMaxOriginThis class describes the origin of min/max values
 CQgsRasterPipeBase class for processing modules
 CQgsRasterPyramidThis struct is used to store pyramid info for the raster layer
 CQgsRasterRangeRaster values range container
 CQgsRasterRendererRegistryRegistry for raster renderers
 CQgsRasterRendererRegistryEntryRegistry for raster renderer entries
 CQgsRasterResamplerInterface for resampling rasters (e.g
 CQgsRasterShaderInterface for all raster shaders
 CQgsRasterShaderFunctionThe raster shade function applies a shader to a pixel at render time - typically used to render grayscale images as false color
 CQgsRasterTransparencyDefines the list of pixel values to be considered as transparent or semi transparent when rendering rasters
 CQgsRasterViewPortThis class provides details of the viewable area that a raster will be rendered into
 CQgsReadWriteContextThe class is used as a container of context for various read/write operations on other objects
 CQgsRectangleA rectangle specified with double values
 CQgsReferencedGeometryBaseA base class for geometry primitives which are stored with an associated reference system
 CQgsRegularPolygonRegular Polygon geometry type
 CQgsReliefProduces colored relief rasters from DEM
 CQgsRenderCheckerThis is a helper class for unit tests that need to write an image and compare it to an expected result or render time
 CQgsRenderContextContains information about the context of a rendering operation
 CQgsRendererAbstractMetadataStores metadata about one renderer class
 CQgsRendererCategoryCategorized renderer
 CQgsRendererRegistryRegistry of renderers
 CQgsRequestHandlerThis class is an interface hiding the details of reading input and writing output from/to a wms request mechanism
 CQgsScaleBarRendererAbstract base class for scale bar renderers
 CQgsScaleBarSettingsStores the appearance and layout settings for scalebar drawing with QgsScaleBarRenderer
 CQgsScaleCalculatorCalculates scale for a given combination of canvas size, map extent, and monitor dpi
 CQgsServerOGC web services
 CQgsServerFilterClass defining I/O filters for QGIS Server and implemented in plugins
 CQgsServerInterfaceQgsServerInterface Class defining interfaces exposed by QGIS Server and made available to plugins
 CQgsServerRequestQgsServerRequest Class defining request interface passed to services QgsService::executeRequest() method
 CQgsServerResponseQgsServerResponse Class defining response interface passed to services QgsService::executeRequest() method
 CQgsServiceQgsService Class defining interfaces for QGIS server services
 CQgsServiceRegistryQgsServiceRegistry Class defining the registry manager for QGIS server services
 CQgsSignalBlocker< Object >RAII signal blocking class
 CQgsSimplifyMethodThis class contains information about how to simplify geometries fetched from a QgsFeatureIterator
 CQgsSnappingConfigThis is a container for configuration of the snapping of the project
 CQgsSourceSelectProviderThis is the interface for those who want to add entries to the QgsDataSourceManagerDialog
 CQgsSourceSelectProviderRegistryThis class keeps a list of source select providers that may add items to the QgsDataSourceManagerDialog When created, it automatically adds providers from data provider plugins (e.g
 CQgsSqlExpressionCompilerGeneric expression compiler for translation to provider specific SQL WHERE clauses
 CQgsSQLStatementClass for parsing SQL statements
 CQgsStatisticalSummaryCalculator for summary statistics for a list of doubles
 CQgsStringReplacementA representation of a single string replacement
 CQgsStringReplacementCollectionA collection of string replacements (specified using QgsStringReplacement objects)
 CQgsStringStatisticalSummaryCalculator for summary statistics and aggregates for a list of strings
 CQgsStringUtilsUtility functions for working with strings
 CQgsSymbolLayerAbstractMetadataStores metadata about one symbol layer class
 CQgsSymbolLayerRegistryRegistry of available symbol layer classes
 CQgsSymbolWidgetContextContains settings which reflect the context in which a symbol (or renderer) widget is shown, e.g., the map canvas and relevant expression contexts
 CQgsTemporalRange< T >A template based class for storing temporal ranges (beginning to end values)
 CQgsTextBackgroundSettingsContainer for settings relating to a text background object
 CQgsTextBufferSettingsContainer for settings relating to a text buffer
 CQgsTextFormatContainer for all settings relating to text rendering
 CQgsTextRendererHandles rendering text using rich formatting options, including drop shadows, buffers and background shapes
 CQgsTextShadowSettingsContainer for settings relating to a text shadow
 CQgsToleranceThis is the class is providing tolerance value in map unit values
 CQgsTracerGraphSimple graph structure for shortest path search
 CQgsUnitTypesHelper functions for various unit types
 CQgsUserProfileUser profile contains information about the user profile folders on the machine
 CQgsVectorA class to represent a vector
 CQgsVectorLayerJoinInfoDefines left outer join from our vector layer to some other vector layer
 CQgsVectorLayerUtilsContains utility methods for working with QgsVectorLayers
 CQgsVectorSimplifyMethodThis class contains information how to simplify geometries fetched from a vector layer
 CQgsVertexIdUtility class for identifying a unique vertex within a geometry
 CQgsVirtualLayerDefinitionClass to manipulate the definition of a virtual layer
 CQgsVirtualLayerDefinitionUtilsUtils class for QgsVirtualLayerDefinition
 CQgsWkbTypesHandles storage of information regarding WKB types and their properties
 CQgsXmlUtilsAssorted helper methods for reading and writing chunks of XML
 CQgsZonalStatisticsA class that calculates raster statistics (count, sum, mean) for a polygon or multipolygon layer and appends the results as attributes
 CQgsAlignRaster::RasterInfoUtility class for gathering information about rasters
 CQgsRuleBasedRenderer::RuleThis class keeps data about a rules for rule-based renderer
 CQgsVectorFileWriter::SaveVectorOptionsOptions to pass to writeAsVectorFormat()
 CQgsScaleBarRenderer::ScaleBarContextContains parameters regarding scalebar calculations
 CQgsGeoNodeRequest::ServiceLayerDetailService layer details for an individual layer from a GeoNode connection
 CQgsDataDefinedSizeLegend::SizeClassDefinition of one class for the legend
 CQgsVirtualLayerDefinition::SourceLayerA SourceLayer is either a reference to a live layer in the registry or all the parameters needed to load it (provider key, source, etc.)
 CQgsLayerMetadata::SpatialExtentMetadata spatial extent structure
 CQgsSQLComposerDialog::SQLValidatorCallbackCallback to do validation check on dialog validation
 CQgsExpressionContextScope::StaticVariableSingle variable definition for use within a QgsExpressionContextScope
 CQgsOWSSourceSelect::SupportedFormatFormats supported by provider
 CQgsSQLComposerDialog::TableSelectedCallbackCallback to do actions on table selection
 CQgsTaskManager::TaskDefinitionDefinition of a task for inclusion in the manager
 CTriangleInterpolatorThis is an interface for interpolator classes for triangulations
 CTriangulationInterface for Triangulation classes
 CQgsMetadataValidator::ValidationResultContains the parameters describing a metadata validation failure
 CVector3DClass Vector3D represents a 3D-Vector, capable to store x-,y- and z-coordinates in double values
 CQgsSQLStatement::VisitorSupport for visitor pattern - algorithms dealing with the statement may be implemented without modifying the Node classes