QGIS API Documentation  2.4.0-Chugiak
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Class Hierarchy

Go to the graphical class hierarchy

This inheritance list is sorted roughly, but not completely, alphabetically:
[detail level 1234]
 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_nmeaPARSER
 C_nmeaPOSPosition data in fractional degrees or radians
 C_nmeaPROPERTY
 C_nmeaSATELLITEInformation about satellite
 C_nmeaSATINFOInformation about all satellites in view
 C_nmeaTIMEDate and time data
 CQgsComposerLegend::AtomAtom is indivisible set (indivisible into more columns)
 CQgsOfflineEditing::AttributeValueChange
 CQgsMapCanvas::CanvasProperties
 CQgsColorRampShader::ColorRampItem
 CQgsInvertedPolygonRenderer::CombinedFeatureStructure where the reversed geometry is built during renderFeature
 CQgsDatumTransformStore::Entry
 CQgsGeometry::Error
 CQgsMapRendererJob::Error
 CQgsInvertedPolygonRenderer::FeatureDecorationClass used to represent features that must be rendered with decorations (selection, vertex markers)
 CQgsFeatureListModel::FeatureInfo
 CQgsRuleBasedRendererV2::FeatureToRender
 CQgsVectorLayerFeatureIterator::FetchJoinInfoJoin information prepared for fast attribute id mapping in QgsVectorLayerJoinBuffer::updateFeatureAttributes()
 CQgsFields::Field
 CFieldSorter
 CQgsExpression::FunctionA abstract base class for defining QgsExpression functions
 CQgsOfflineEditing::GeometryChange
 CGEOSException
 CGEOSInit
 CQgsVectorLayer::GroupData
 CHalfEdge
 CQgsExpressionHighlighter::HighlightingRule
 CQgsMapToolIdentify::IdentifyResult
 CQgsProject::Imp
 CQgsExpression::Interval
 CQgsConnectionPoolGroup< T >::Item
 CIVisitor
 CQgsLabel::labelpoint
 CQgsInterpolator::LayerDataA layer together with the information about interpolation attribute / z-coordinate interpolation and the type (point, structure line, breakline)
 CLayerRenderJobStructure keeping low-level rendering job information
 CLine3DThis class represents a line
 CQgsVectorFileWriter::MetaData
 CMyLine
 CQgsVectorDataProvider::NativeType
 CQgsRasterNuller::NoData
 CNodeNode is a class used by Line3D
 CQgsExpression::Node
 CQgsExpression::NodeList
 CQgsComposerLegend::NucleonNucleon is either group title, layer title or layer child item
 CQgsVectorFileWriter::Option
 CPalGeometry
 CParametricLineParametricLine is an Interface for parametric lines
 CPoint3DPoint3D is a class to represent a three dimensional point
 CHistogramItem::PrivateData
 CQAbstractItemDelegate
 CQAbstractItemModel
 CQAbstractProxyModel
 CQAbstractTableModel
 CQAction
 CQApplication
 CQComboBox
 CQDial
 CQDialog
 CQEvent
 CQFileDialog
 CQFrame
 CQGisGlobal constants for use throughout the application
 CQgisPluginAbstract base class from which all plugins must inherit
 CQGraphicsEffect
 CQGraphicsItem
 CQGraphicsRectItem
 CQGraphicsScene
 CQGraphicsView
 CQGroupBox
 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
 CQgsAbstractGeometrySimplifierAbstract base class for simplify geometries using a specific algorithm
 CQgsActionUtility class that encapsulates an action based on vector attributes
 CQgsAttributeActionStorage and management of actions associated with Qgis layer attributes
 CQgsAttributeEditorContextThis class contains context information for attribute editor widgets
 CQgsAttributeFormInterface
 CQgsAttributeLoadValues
 CQgsVectorLayerCache::QgsCachedFeatureThis is a wrapper class around a cached QgsFeature, which will inform the cache, when it has been deleted, so indexes can be updated that the wrapped feature needs to be fetched again if needed
 CQgsCharacterSelectorBase
 CQgsClipperA class to trim lines and polygons to within a rectangular region
 CQgsColorBrewerPalette
 CQgsComposerAttributeTableCompareHelper class for sorting tables, takes into account sorting column and ascending / descending
 CQgsComposerLegendStyleComposer legend components style
 CQgsConnectionPool< T, T_Group >Template class responsible for keeping a pool of open connections
 CQgsConnectionPoolGroup< T >
 CQgsConstWkbPtr
 CQgsContrastEnhancementManipulates raster pixel values so that they enhanceContrast or clip into a specified numerical range according to the specified ContrastEnhancementAlgorithm
 CQgsContrastEnhancementFunctionA contrast enhancement funcion is the base class for all raster contrast enhancements
 CQgsCoordinateReferenceSystemClass for storing a coordinate reference system (CRS)
 CQgsCoordinateTransformCacheCache coordinate transform by authid of source/dest transformation to avoid the overhead of initialisation for each redraw
 CQgsCptCityArchive
 CQgsCredentialsInterface for requesting credentials in QGIS in GUI independent way
 CQgsCRSCache
 CQgsDataDefinedA container class for data source field mapping or expression
 CQgsDataSourceURIClass for storing the component parts of a PostgreSQL/RDBMS datasource URI
 CQgsDatumTransformDialogBase
 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
 CQgsDetailedItemWidgetBase
 CQgsDiagramInterpolationSettings
 CQgsDiagramLayerSettings
 CQgsDiagramRendererV2Returns diagram settings for a feature
 CQgsDiagramSettings
 CQgsDistanceAreaGeneral purpose distance and area calculator
 CQgsDualViewBase
 CQgsErrorQgsError is container for error messages (report)
 CQgsErrorDialogBase
 CQgsErrorMessageQgsErrorMessage represents single error message
 CQgsExceptionDefines a qgis exception class
 CQgsExpressionClass for parsing and evaluation of expressions (formerly called "search strings")
 CQgsExpressionBuilderDialogBase
 CQgsExpressionBuilderWidgetBase
 CQgsExpressionSelectionDialogBase
 CQgsExtentGroupBoxWidget
 CQgsFeatureThe feature class encapsulates a single feature including its id, geometry and a list of field/values attributes
 CQgsFeatureIteratorWrapper for iterator of features from vector data provider or vector layer
 CQgsFeatureModel
 CQgsFeatureRendererV2
 CQgsFeatureRequestThis class wraps a request for features to a vector layer (or directly its vector data provider)
 CQgsFeatureSelectionDlg
 CQgsFeatureStoreContainer for features with the same fields and crs
 CQgsFieldEncapsulate a field in an attribute table or data source
 CQgsFieldsContainer of fields for a vector layer
 CQgsFontUtils
 CQgsGenericProjectionSelectorBase
 CQgsGeometry
 CQgsGeometryAnalyzerThe QGis class provides vector geometry analysis functions
 CQgsGeometryCache
 CQgsGmlFeatureClass
 CQgsGPSConnectionRegistryA singleton class to register / unregister existing GPS connections such that the information is available to all classes and plugins
 CQgsGPSInformation
 CQgsGradientStop
 CQgsGridFileWriterA class that does interpolation to a grid and writes the results to an ascii grid
 CQgsInterpolatorInterface class for interpolations
 CQgsLabelA class to render labels
 CQgsLabelAttributesA class to store attributes needed for label rendering
 CQgsLabelCandidate
 CQgsLabelComponentMaintains current state of more grainular and temporal values when creating/painting component parts of an individual label (e.g
 CQgsLabelingEngineInterfaceLabeling engine interface
 CQgsLabelingResultsClass that stores computed placement from labeling engine
 CQgsLabelPosition
 CQgsLabelSearchTreeA class to query the labeling structure at a given point (small wraper around pal RTree class)
 CQgsLayerCoordinateTransform
 CQgsLegacyHelpers
 CQgsLoggerQgsLogger is a class to print debug/warning/error messages to the console
 CQgsLUDialogBase
 CQgsManageConnectionsDialogBase
 CQgsMapCanvasLayerA class that stores visibility and presence in overview flags together with pointer to the layer
 CQgsMapCanvasSnapperThis class reads the snapping properties from the current project and configures a QgsSnapper to perform the snapping
 CQgsMapLayerRendererBase class for utility classes that encapsulate information necessary for rendering of map layers
 CQgsMapSettingsConfiguration for rendering of the map
 CQgsMapTipA maptip is a class to display a tip on a map canvas when a mouse is hovered over a feature
 CQgsMapToPixelPerform transforms between map coordinates and device coordinates
 CQgsMapUnitScale
 CQgsMapUnitScaleDialog
 CQgsMessageLogViewer
 CQgsMessageOutputInterface for showing messages from QGIS in GUI independent way
 CQgsMessageViewer
 CQgsMimeDataUtils
 CQgsMultiBandColorRendererWidgetBase
 CQgsNewHttpConnectionBase
 CQgsNewVectorLayerDialogBase
 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
 CQgsOldSymbolMeta
 CQgsOverlayAnalyzerThe QGis class provides vector overlay analysis functions
 CQgsOWSSourceSelectBase
 CQgsPalettedRendererWidgetBase
 CQgsPalLayerSettings
 CQgsPluginLayerRegistryRegistry of plugin layers types
 CQgsPluginLayerTypeClass for creating plugin specific layers
 CQgsPointA class to represent a point geometry
 CQgsPointSampleCreates random points in polygons / multipolygons
 CQgsProjectBadLayerHandlerInterface for classes that handle missing layer files when reading project file
 CQgsProjectFileTransform
 CQgsProjectionSelectorBase
 CQgsProjectVersionA class to describe the version of a project
 CQgsPropertyAn Abstract Base Class for QGIS project property hierarchies
 CQgsProviderMetadataHolds data provider key, description, and associated shared library file information
 CQgsProviderRegistryA registry / canonical manager of data providers
 CQgsPythonRunnerUtility class for running python commands from various parts of QGIS
 CQgsQueryBuilderBase
 CQgsRasterRaster namespace
 CQgsRasterBandStatsThe RasterBandStats struct is a container for statistics about a single raster band
 CQgsRasterBlockRaster data container
 CQgsRasterCalcNode
 CQgsRasterCalculatorRaster calculator class
 CQgsRasterCalculatorEntry
 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
 CQgsRasterFormatSaveOptionsWidgetBase
 CQgsRasterHistogramThe QgsRasterHistogram is a container for histogram of a single raster band
 CQgsRasterHistogramWidgetBase
 CQgsRasterIdentifyResultRaster identify results container
 CQgsRasterInterfaceBase class for processing filters like renderers, reprojector, resampler etc
 CQgsRasterIteratorIterator for sequentially processing raster cells
 CQgsRasterLayerSaveAsDialogBase
 CQgsRasterMatrix
 CQgsRasterMinMaxWidgetBase
 CQgsRasterPipeBase class for processing modules
 CQgsRasterPyramidThis struct is used to store pyramid info for the raster layer
 CQgsRasterPyramidsOptionsWidgetBase
 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
 CQgsRectangleA rectangle specified with double values
 CQgsRelation
 CQgsRelationAddDlgBase
 CQgsRelationEditorWidgetBase
 CQgsRelationManagerDialogBase
 CQgsReliefProduces coloured 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
 CQgsRendererCategoryV2
 CQgsRendererRangeV2
 CQgsRendererV2AbstractMetadataStores metadata about one renderer class
 CQgsRendererV2RegistryRegistry of renderers
 CQgsSatelliteInfo
 CQgsScaleBarStyleAbstraction of composer scale bar style
 CQgsScaleCalculatorCalculates scale for a given combination of canvas size, map extent, and monitor dpi
 CQgsScaleUtils
 CQgsScopeLogger
 CQgsSimplifyMethodThis class contains information about how to simplify geometries fetched from a QgsFeatureIterator
 CQgsSingleBandGrayRendererWidgetBase
 CQgsSingleBandPseudoColorRendererWidgetBase
 CQgsSnapperA class that allows advanced snapping operations on a set of vector layers
 CQgsSnappingResultRepresents the result of a snapping operation
 CQgsSpatialIndex
 CQgsSublayersDialogBase
 CQgsSvgCacheEntry
 CQgsSymbolLayerV2
 CQgsSymbolLayerV2AbstractMetadataStores metadata about one symbol layer class
 CQgsSymbolLayerV2RegistryRegistry of available symbol layer classes
 CQgsSymbolLayerV2Utils
 CQgsSymbologyV2ConversionThis class is not a part of public API, it is intended only for compatibility with older versions of QGIS (1.x)
 CQgsSymbolV2
 CQgsSymbolV2LevelItem
 CQgsSymbolV2RenderContext
 CQgsToleranceThis is the class is providing tolerance value in map unit values
 CQgsTransectSampleA class for the creation of transect sample lines based on a set of strata polygons and baselines
 CQgsUnitSelectionWidget
 CQgsVectorA class to represent a vector
 CQgsVectorColorRampV2
 CQgsVectorFileWriterA convenience class for writing vector files to disk
 CQgsVectorJoinInfo
 CQgsVectorLayerEditUtils
 CQgsVectorLayerImportA convenience class for writing vector files to disk
 CQgsVectorLayerJoinBufferManages joined fields for a vector layer
 CQgsVectorLayerToolsMethods in this class are used to handle basic operations on vector layers
 CQgsVectorSimplifyMethodThis class contains information how to simplify geometries fetched from a vector layer
 CQgsWkbPtr
 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
 CQItemDelegate
 CQItemSelectionModel
 CQLineEdit
 CQListView
 CQNetworkAccessManager
 CQNetworkProxyFactory
 CQObject
 CQPaintEngine
 CQPair
 CQPushButton
 CQSharedData
 CQSlider
 CQSortFilterProxyModel
 CQStackedWidget
 CQStandardItem
 CQStandardItemModel
 CQSyntaxHighlighter
 CQTableView
 CQThread
 CQToolButton
 CQTreeWidget
 CQTreeWidgetItem
 CQUndoCommand
 CQValidator
 CQWidget
 CQwtPlotItem
 CQgsVectorLayer::RangeData
 CQgsRasterIterator::RasterPartInfo
 CQgsRelief::ReliefColor
 CQgsRuleBasedRendererV2::RenderJob
 CQgsRuleBasedRendererV2::RenderLevel
 CQgsRuleBasedRendererV2::RuleThis class keeps data about a rules for rule-based renderer
 CQgsSnapper::SnapLayer
 CQgsOWSSourceSelect::SupportedFormatFormats supported by provider
 CQgsVectorLayer::TabData
 CQgsProjectFileTransform::transform
 CQgsRasterTransparency::TransparentSingleValuePixel
 CQgsRasterTransparency::TransparentThreeValuePixel
 CTriangleInterpolatorThis is an interface for interpolator classes for triangulations
 CTriangulationInterface for Triangulation classes
 CUi_QgsCredentialDialog
 CQgsMimeDataUtils::Uri
 CQgsVectorLayer::ValueRelationData
 CVector3DClass Vector3D represents a 3D-Vector, capable to store x-,y- and z-coordinates in double values
 CvertexData
 CQgsExpression::VisitorSupport for visitor pattern - algorithms dealing with the expressions may be implemented without modifying the Node classes
 CQgsExpression::WhenThen