QGIS API Documentation  2.0.1-Dufour
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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]
oC_nmeaGPGGAGGA packet information structure (Global Positioning System Fix Data)
oC_nmeaGPGSAGSA packet information structure (Satellite status)
oC_nmeaGPGSVGSV packet information structure (Satellites in view)
oC_nmeaGPRMCRMC packet information structure (Recommended Minimum sentence C)
oC_nmeaGPVTGVTG packet information structure (Track made good and ground speed)
oC_nmeaINFOSummary GPS information from all parsed packets, used also for generating NMEA stream
oC_nmeaPARSER
oC_nmeaPOSPosition data in fractional degrees or radians
oC_nmeaPROPERTY
oC_nmeaSATELLITEInformation about satellite
oC_nmeaSATINFOInformation about all satellites in view
oC_nmeaTIMEDate and time data
oCQgsComposerLegend::AtomAtom is indivisible set (indivisible into more columns)
oCQgsOfflineEditing::AttributeValueChange
oCQgsMapCanvas::CanvasProperties
oCQgsColorRampShader::ColorRampItem
oCQgsGeometry::Error
oCQgsFeatureListModel::FeatureInfo
oCQgsRuleBasedRendererV2::FeatureToRender
oCQgsVectorLayerFeatureIterator::FetchJoinInfoJoin information prepared for fast attribute id mapping in QgsVectorLayerJoinBuffer::updateFeatureAttributes()
oCQgsFields::Field
oCFieldSorter
oCQgsExpression::FunctionA abstract base class for defining QgsExpression functions
oCQgsOfflineEditing::GeometryChange
oCGEOSException
oCGEOSInit
oCQgsVectorLayer::GroupData
oCHalfEdge
oCQgsExpressionHighlighter::HighlightingRule
oCQgsMapToolIdentify::IdentifyResult
oCQgsProject::Imp
oCQgsExpression::Interval
oCQgsLabel::labelpoint
oCQgsInterpolator::LayerDataA layer together with the information about interpolation attribute / z-coordinate interpolation and the type (point, structure line, breakline)
oCLine3DThis class represents a line
oCMyLine
oCQgsVectorDataProvider::NativeType
oCQgsRasterNuller::NoData
oCQgsExpression::Node
oCNodeNode is a class used by Line3D
oCQgsExpression::NodeList
oCQgsComposerLegend::NucleonNucleon is either group title, layer title or layer child item
oCParametricLineParametricLine is an Interface for parametric lines
oCPoint3DPoint3D is a class to represent a three dimensional point
oCQGisGlobal constants for use throughout the application
oCQgisInterfaceQgisInterface Abstract base class defining interfaces exposed by QgisApp and made available to plugins
oCQgisPluginAbstract base class from which all plugins must inherit
oCQgisVisitor
oCQgsAbstractCacheIndexAbstract base class for cache indices
oCQgsAbstractFeatureIteratorInternal feature iterator to be implemented within data providers
oCQgsActionUtility class that encapsulates an action based on vector attributes
oCQgsAddRemoveItemCommandA composer command class for adding / removing composer items
oCQgsAddRemoveMultiFrameCommand
oCQgsApplicationExtends QApplication to provide access to QGIS specific resources such as theme paths, database paths etc
oCQgsApplyDialogInterface class for dialogs that have an apply operation (e.g
oCQgsAtlasCompositionClass used to render an Atlas, iterating over geometry features
oCQgsAttributeActionStorage and management of actions associated with Qgis layer attributes
oCQgsAttributeDialog
oCQgsAttributeEditor
oCQgsAttributeEditorElement
oCQgsAttributeTableAction
oCQgsAttributeTableDelegateA delegate item class for QgsAttributeTable (see Qt documentation for QItemDelegate)
oCQgsAttributeTableModelA model backed by a QgsVectorLayerCache which is able to provide feature/attribute information to a QAbstractItemView
oCQgsAttributeTableViewProvides a table view of features of a QgsVectorLayer
oCQgsBlendModeComboBoxA combobox which lets the user select blend modes from a predefined list
oCQgsBrowserModel
oCQgsBusyIndicatorDialogA simple dialog to show an indeterminate busy progress indicator
oCQgsVectorLayerCache::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
oCQgsCharacterSelectorDialogA dialog for selecting a single character from a single font
oCQgsClipperA class to trim lines and polygons to within a rectangular region
oCQgsCollapsibleGroupBoxBasicA groupbox that collapses/expands when toggled
oCQgsColorBrewerPalette
oCQgsColorButtonA cross platform button subclass for selecting colors. Will open a color chooser dialog when clicked. Offers live updates to button from color chooser dialog
oCQgsColorDialogA dialog for selecting a color
oCQgsComposerAttributeTableCompareHelper class for sorting, takes into account sorting column and ascending / descending
oCQgsComposerEffect
oCQgsComposerItemA item that forms part of a map composition
oCQgsComposerItemCommandUndo command to undo/redo all composer item related changes
oCQgsComposerLegendItemAbstract base class for the legend item types
oCQgsComposerLegendStyleComposer legend components style
oCQgsComposerMultiFrameAbstract base class for composer entries with the ability to distribute the content to several frames (items)
oCQgsComposerMultiFrameCommand
oCQgsComposerRulerA class to show paper scale and the current cursor position
oCQgsComposerStyleItem
oCQgsComposerViewWidget to display the composer items
oCQgsCompositionGraphics scene for map printing
oCQgsContextHelpProvides a context based help browser for a dialog
oCQgsContrastEnhancementManipulates raster pixel values so that they enhanceContrast or clip into a specified numerical range according to the specified ContrastEnhancementAlgorithm
oCQgsContrastEnhancementFunctionA contrast enhancement funcion is the base class for all raster contrast enhancements
oCQgsCoordinateReferenceSystemClass for storing a coordinate reference system (CRS)
oCQgsCoordinateTransformClass for doing transforms between two map coordinate systems
oCQgsCoordinateTransformCacheCache coordinate transform by authid of source/dest transformation to avoid the overhead of initialisation for each redraw
oCQgsCptCityArchive
oCQgsCptCityBrowserModel
oCQgsCptCityDataItemBase class for all items in the model
oCQgsCredentialsInterface for requesting credentials in QGIS in GUI independent way
oCQgsCRSCache
oCQgsDataDefinedA container class for data source field mapping or expression
oCQgsDataDefinedButtonA button for defining data source field mappings or expressions
oCQgsDataItemBase class for all items in the model
oCQgsDataProviderAbstract base class for spatial data provider implementations
oCQgsDataSourceURIClass for storing the component parts of a PostgreSQL/RDBMS datasource URI
oCQgsDbFilterProxyModelA class that implements a custom filter and can be used as a proxy for QgsDbTableModel
oCQgsDetailedItemDataThis class is the data only representation of a QgsDetailedItemWidget, designed to be used in custom views
oCQgsDetailedItemDelegateA custom model/view delegate that can display an icon, heading and detail sections
oCQgsDetailedItemWidgetA widget renderer for detailed item views
oCQgsDiagramInterpolationSettings
oCQgsDiagramLayerSettings
oCQgsDiagramRendererV2Returns diagram settings for a feature
oCQgsDiagramSettings
oCQgsDialogA generic dialog with layout and button box
oCQgsDirectoryParamWidget
oCQgsDistanceAreaGeneral purpose distance and area calculator
oCQgsDualViewThis widget is used to show the attributes of a set of features of a QgsVectorLayer
oCQgsEncodingFileDialogA file dialog which lets the user select the preferred encoding type for a data provider
oCQgsErrorQgsError is container for error messages (report)
oCQgsErrorDialog
oCQgsErrorMessageQgsErrorMessage represents single error message
oCQgsExceptionDefines a qgis exception class
oCQgsExpressionClass for parsing and evaluation of expressions (formerly called "search strings")
oCQgsExpressionBuilderDialogA generic dialog for building expression strings
oCQgsExpressionBuilderWidgetA reusable widget that can be used to build a expression string
oCQgsExpressionHighlighter
oCQgsExpressionItemAn expression item that can be used in the QgsExpressionBuilderWidget tree
oCQgsExpressionItemSearchProxySearch proxy used to filter the QgsExpressionBuilderWidget tree
oCQgsExpressionSelectionDialogThis class offers a dialog to change feature selections
oCQgsFeatureThe feature class encapsulates a single feature including its id, geometry and a list of field/values attributes
oCQgsFeatureIteratorWrapper for iterator of features from vector data provider or vector layer
oCQgsFeatureListViewShows a list of features and renders a edit button next to each feature
oCQgsFeatureListViewDelegate
oCQgsFeatureModel
oCQgsFeatureRendererV2
oCQgsFeatureRequestThis class wraps a request for features to a vector layer (or directly its vector data provider)
oCQgsFeatureSelectionModel
oCQgsFeatureStoreContainer for features with the same fields and crs
oCQgsFieldEncapsulate a field in an attribute table or data source
oCQgsFieldsContainer of fields for a vector layer
oCQgsFieldValidator
oCQgsFileDropEditA line edit for capturing file names that can have files dropped onto it via drag & drop
oCQgsFilterLineEditLineedit with builtin clear button
oCQgsFontUtils
oCQgsGenericProjectionSelectorA generic dialog to prompt the user for a Coordinate Reference System
oCQgsGeometryA geometry is the spatial representation of a feature
oCQgsGeometryAnalyzerThe QGis class provides vector geometry analysis functions
oCQgsGeometryCache
oCQgsGeometryValidator
oCQgsGmlThis class reads data from a WFS server or alternatively from a GML file
oCQgsGmlFeatureClass
oCQgsGmlSchema
oCQgsGPSConnectionAbstract base class for connection to a GPS device
oCQgsGPSConnectionRegistryA singleton class to register / unregister existing GPS connections such that the information is available to all classes and plugins
oCQgsGPSDetector
oCQgsGPSInformation
oCQgsGradientStop
oCQgsGridFileWriterA class that does interpolation to a grid and writes the results to an ascii grid
oCQgsGroupBoxCollapseButton
oCQgsHttpTransactionHTTP request/response manager that is redirect-aware
oCQgsInterpolatorInterface class for interpolations
oCQgsLabelA class to render labels
oCQgsLabelAttributesA class to store attributes needed for label rendering
oCQgsLabelCandidate
oCQgsLabelComponentMaintains current state of more grainular and temporal values when creating/painting component parts of an individual label (e.g
oCQgsLabelingEngineInterfaceLabeling engine interface
oCQgsLabelPosition
oCQgsLabelSearchTreeA class to query the labeling structure at a given point (small wraper around pal RTree class)
oCQgsLegendInterfaceQgsLegendInterface Abstract base class to make QgsLegend available to plugins
oCQgsLegendModelA model that provides group, layer and classification items
oCQgsLoggerQgsLogger is a class to print debug/warning/error messages to the console
oCQgsLongLongValidator
oCQgsLUDialog
oCQgsManageConnectionsDialog
oCQgsMapCanvasMap canvas is a class for displaying all GIS data types on a canvas
oCQgsMapCanvasItemAn abstract class for items that can be placed on the map canvas
oCQgsMapCanvasLayerA class that stores visibility and presence in overview flags together with pointer to the layer
oCQgsMapCanvasMapA rectangular graphics item representing the map on the canvas
oCQgsMapCanvasSnapperThis class reads the snapping properties from the current project and configures a QgsSnapper to perform the snapping
oCQgsMapLayerBase class for all map layer types
oCQgsMapLayerRegistryThis class tracks map layers that are currently loaded and provides a means to fetch a pointer to a map layer and delete it
oCQgsMapOverviewCanvasA widget that displays an overview map
oCQgsMapRendererA non GUI class for rendering a map layer set onto a QPainter
oCQgsMapTipA maptip is a class to display a tip on a map canvas when a mouse is hovered over a feature
oCQgsMapToolAbstract base class for all map tools
oCQgsMapToPixelPerform transforms between map coordinates and device coordinates
oCQgsMessageBarA bar for displaying non-blocking messages to the user
oCQgsMessageBarItem
oCQgsMessageLogInterface for logging messages from QGIS in GUI independent way
oCQgsMessageLogConsoleDefault implementation of message logging interface
oCQgsMessageLogViewerA generic message for displaying QGIS log messages
oCQgsMessageOutputInterface for showing messages from QGIS in GUI independent way
oCQgsMimeDataUtils
oCQgsNetworkAccessManager
oCQgsNetworkReplyParserMultipart QNetworkReply parser
oCQgsNewHttpConnectionDialog to allow the user to configure and save connection information for an HTTP Server for WMS, etc
oCQgsNewVectorLayerDialog
oCQgsNineCellFilterBase 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
oCQgsNumericSortTreeWidgetItemQTreeWidgetItem that can sort numerically (as opposed to just lexigraphically)
oCQgsOfflineEditing
oCQgsOgcUtilsVarious utility functions for conversion between OGC (Open Geospatial Consortium) standards and QGIS internal representations
oCQgsOldSymbolMeta
oCQgsOptionsDialogBaseA base dialog for options and properties dialogs that offers vertical tabs
oCQgsOverlayAnalyzerThe QGis class provides vector overlay analysis functions
oCQgsOWSConnectionConnections management
oCQgsOWSSourceSelectDialog to create connections and add layers from WMS, WFS, WCS etc
oCQgsPaintEngineHack
oCQgsPalGeometry
oCQgsPalLayerSettings
oCQgsPanningWidgetWidget that serves as rectangle showing current extent in overview
oCQgsPluginLayerRegistryRegistry of plugin layers types
oCQgsPluginLayerTypeClass for creating plugin specific layers
oCQgsPluginManagerInterface
oCQgsPointA class to represent a point geometry
oCQgsProjectReads and writes project states
oCQgsProjectBadLayerHandlerInterface for classes that handle missing layer files when reading project file
oCQgsProjectFileTransform
oCQgsProjectionSelectorA widget for selecting a Coordinate reference system from a tree
oCQgsProjectVersionA class to describe the version of a project
oCQgsPropertyAn Abstract Base Class for QGIS project property hierarchies
oCQgsProviderCountCalcEventA custom event that is designed to be fired when a layer count has been fully calculated
oCQgsProviderExtentCalcEventA custom event that is designed to be fired when a layer extent has been fully calculated
oCQgsProviderMetadataHolds data provider key, description, and associated shared library file information
oCQgsProviderRegistryA registry / canonical manager of data providers
oCQgsPythonRunnerUtility class for running python commands from various parts of QGIS
oCQgsQueryBuilderQuery Builder for layers
oCQgsRasterRaster namespace
oCQgsRasterBandStatsThe RasterBandStats struct is a container for statistics about a single raster band
oCQgsRasterBlockRaster data container
oCQgsRasterCalcNode
oCQgsRasterCalculatorRaster calculator class
oCQgsRasterCalculatorEntry
oCQgsRasterCheckerThis is a helper class for unit tests that need to write an image and compare it to an expected result or render time
oCQgsRasterDrawerThe drawing pipe for raster layers
oCQgsRasterFileWriterThe raster file writer which allows you to save a raster to a new file
oCQgsRasterFormatSaveOptionsWidgetA widget to select format-specific raster saving options
oCQgsRasterHistogramThe QgsRasterHistogram is a container for histogram of a single raster band
oCQgsRasterHistogramWidgetHistogram widget
oCQgsRasterIdentifyResultRaster identify results container
oCQgsRasterInterfaceBase class for processing filters like renderers, reprojector, resampler etc
oCQgsRasterIteratorIterator for sequentially processing raster cells
oCQgsRasterLayerSaveAsDialog
oCQgsRasterMatrix
oCQgsRasterMinMaxWidget
oCQgsRasterPipeBase class for processing modules
oCQgsRasterPyramidThis struct is used to store pyramid info for the raster layer
oCQgsRasterPyramidsOptionsWidgetA widget to select format-specific raster saving options
oCQgsRasterRangeRaster values range container
oCQgsRasterRendererRegistryRegistry for raster renderers
oCQgsRasterRendererRegistryEntryRegistry for raster renderer entries
oCQgsRasterRendererWidget
oCQgsRasterResamplerInterface for resampling rasters (e.g
oCQgsRasterShaderInterface for all raster shaders
oCQgsRasterShaderFunctionThe raster shade function applies a shader to a pixel at render time - typically used to render grayscale images as false color
oCQgsRasterTransparencyDefines the list of pixel values to be considered as transparent or semi transparent when rendering rasters
oCQgsRasterViewPortThis class provides details of the viewable area that a raster will be rendered into
oCQgsRectangleA rectangle specified with double values
oCQgsReliefProduces coloured relief rasters from DEM
oCQgsRenderCheckerThis is a helper class for unit tests that need to write an image and compare it to an expected result or render time
oCQgsRenderContextContains information about the context of a rendering operation
oCQgsRendererCategoryV2
oCQgsRendererRangeV2
oCQgsRendererV2AbstractMetadataStores metadata about one renderer class
oCQgsRendererV2RegistryRegistry of renderers
oCQgsRunProcessA class that executes an external program/script
oCQgsSatelliteInfo
oCQgsScaleBarStyleAbstraction of composer scale bar style
oCQgsScaleCalculatorCalculates scale for a given combination of canvas size, map extent, and monitor dpi
oCQgsScaleComboBoxA combobox which lets the user select map scale from predefined list and highlights nearest to current scale value
oCQgsScaleUtils
oCQgsScopeLogger
oCQgsSearchQueryBuilderQuery Builder for search strings
oCQgsSnapperA class that allows advanced snapping operations on a set of vector layers
oCQgsSnappingResultRepresents the result of a snapping operation
oCQgsSpatialIndex
oCQgsStringRelay
oCQgsStyleV2
oCQgsSublayersDialog
oCQgsSvgCacheA cache for images / pictures derived from svg files
oCQgsSvgCacheEntry
oCQgsSymbolLayerV2
oCQgsSymbolLayerV2AbstractMetadataStores metadata about one symbol layer class
oCQgsSymbolLayerV2RegistryRegistry of available symbol layer classes
oCQgsSymbolLayerV2Utils
oCQgsSymbologyV2ConversionThis class is not a part of public API, it is intended only for compatibility with older versions of QGIS (1.x)
oCQgsSymbolV2
oCQgsSymbolV2LevelItem
oCQgsSymbolV2RenderContext
oCQgsToleranceThis is the class is providing tolerance value in map unit values
oCQgsVectorA class to represent a vector
oCQgsVectorColorRampV2
oCQgsVectorFileWriterA convenience class for writing vector files to disk
oCQgsVectorJoinInfo
oCQgsVectorLayerCacheThis class caches features of a given QgsVectorLayer
oCQgsVectorLayerEditBuffer
oCQgsVectorLayerEditUtils
oCQgsVectorLayerImportA convenience class for writing vector files to disk
oCQgsVectorLayerJoinBufferManages joined fields for a vector layer
oCQgsVectorLayerUndoCommand
oCQgsZonalStatisticsA class that calculates raster statistics (count, sum, mean) for a polygon or multipolygon layer and appends the results as attributes
oCQgsVectorLayer::RangeData
oCQgsRasterIterator::RasterPartInfo
oCQgsRelief::ReliefColor
oCQgsRuleBasedRendererV2::RenderJob
oCQgsRuleBasedRendererV2::RenderLevel
oCQgsRuleBasedRendererV2::RuleThis class keeps data about a rules for rule-based renderer
oCQgsSnapper::SnapLayer
oCQgsOWSSourceSelect::SupportedFormatFormats supported by provider
oCQgsVectorLayer::TabData
oCQgsProjectFileTransform::transform
oCQgsRasterTransparency::TransparentSingleValuePixel
oCQgsRasterTransparency::TransparentThreeValuePixel
oCTriangleInterpolatorThis is an interface for interpolator classes for triangulations
oCTriangulationInterface for Triangulation classes
oCQgsMimeDataUtils::Uri
oCQgsVectorLayer::ValueRelationData
oCVector3DClass Vector3D represents a 3D-Vector, capable to store x-,y- and z-coordinates in double values
oCvertexData
oCQgsExpression::VisitorSupport for visitor pattern - algorithms dealing with the expressions may be implemented without modifying the Node classes
\CQgsExpression::WhenThen