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api_break.dox
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api_break.dox
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/*! \page api_break Backwards Incompatible Changes
\tableofcontents
The API of QGIS libraries is allowed to be changed just between major versions of QGIS. For example, there
are various planned backwards incompatible changes between QGIS 1.8 and 2.0 because the version 2.0 is a new
major version. After a release of a major version of QGIS (e.g. 2.0) the developer team is committed to maintain
stable API for all subsequent minor releases (2.2, 2.4, ...). That roughly means we do not rename classes and methods,
remove them nor change their semantics. Existing code should keep working when the user updates QGIS
to another minor version (e.g. from 2.0 to 2.2), so all extensions of existing classes should be done in a manner that
third party developers do not need to adjust their code to work properly with newer QGIS releases.
Sometimes, however, we may need to break the API as a result of some code changes. These cases should be only exceptions
and they should happen only after consideration and agreement of the development team. Backwards incompatible changes
with too big impact should be deferred to a major version release.
This page tries to maintain a list with incompatible changes that happened in previous releases.
QGIS 3.0 {#qgis_api_break_3_0}
========
Version 3.0 brings changes to many underlying dependencies which QGIS is built upon. Any existing PyQGIS code will
need to be updated to address the changes made within these libraries.
Python 3.0
----------
QGIS 3.0 introduces a move to Python 3. This version brings many changes to both the Python language and individual Python
libraries. A good place to start learning about the changes involved, and how to port your code to Python 3, is available
in the official Python documentation: [Porting Python 2 Code to Python 3](https://docs.python.org/3/howto/pyporting.html).
Qt 5
----
QGIS 3.0 is based off version 5 of the underlying Qt libraries. Many changes and API breaks were introduced in Qt5. While
it is c++ specific, a good place to read about the major changes introduced in Qt5 is at the Qt docs:
[C++ API changes](http://doc.qt.io/qt-5/sourcebreaks.html)
PyQt 5
------
Together with the Python and Qt version changes, the PyQt libraries which expose Qt classes to Python have also had their
version bumped to PyQt 5. The changes introduced in PyQt 5 and the steps required to upgrade existing code are summarised at:
[Differences Between PyQt4 and PyQt5](http://pyqt.sourceforge.net/Docs/PyQt5/pyqt4_differences.html)
Moved Classes {#qgis_api_break_3_0_moved_classes}
-------------
<table>
<caption id="moved_classes">Moved classes</caption>
<tr><th>class<th>Module 2.X<th>Module 3.x
<tr><td>QgsMapLayerModel<td>gui<td>core
<tr><td>QgsMapLayerProxyModel<td>gui<td>core
</table>
Renamed Classes {#qgis_api_break_3_0_renamed_classes}
---------------
<table>
<caption id="renamed_classes">Renamed classes</caption>
<tr><th>API 2.x<th>API 3.X
<tr><td>QgisGui<td>QgsGuiUtils
<tr><td>QgsAttributeAction<td>QgsActionManager
<tr><td>QgsAbstractGeometryV2<td>QgsAbstractGeometry
<tr><td>QgsCategorizedSymbolRendererV2<td>QgsCategorizedSymbolRenderer
<tr><td>QgsCategorizedSymbolRendererV2Model<td>QgsCategorizedSymbolRendererModel
<tr><td>QgsCategorizedSymbolRendererV2ViewStyle<td>QgsCategorizedSymbolRendererViewStyle
<tr><td>QgsCategorizedSymbolRendererV2Widget<td>QgsCategorizedSymbolRendererWidget
<tr><td>QgsCentroidFillSymbolLayerV2<td>QgsCentroidFillSymbolLayer
<tr><td>QgsCentroidFillSymbolLayerV2Widget<td>QgsCentroidFillSymbolLayerWidget
<tr><td>QgsCircularStringV2<td>QgsCircularString
<tr><td>QgsColorButtonV2<td>QgsColorButton
<tr><td>QgsComposerLegendStyle<td>QgsLegendStyle
<tr><td>QgsComposerSymbolV2Item<td>QgsComposerSymbolItem
<tr><td>QgsComposerTableAvailableSortProxyModelV2<td>QgsComposerTableAvailableSortProxyModel
<tr><td>QgsCompoundCurveV2<td>QgsCompoundCurve
<tr><td>QgsCoordinateSequenceV2<td>QgsCoordinateSequence
<tr><td>QgsCptCityColorRampV2<td>QgsCptCityColorRamp
<tr><td>QgsCptCityColorRampV2Dialog<td>QgsCptCityColorRampDialog
<tr><td>QgsCptCityColorRampV2DialogBase<td>QgsCptCityColorRampDialogBase
<tr><td>QgsCurvePolygonV2<td>QgsCurvePolygon
<tr><td>QgsCurveV2<td>QgsCurve
<tr><td>QgsDbFilterProxyModel<td>QgsDatabaseFilterProxyModel
<tr><td>QgsDiagramRendererV2<td>QgsDiagramRenderer
<tr><td>QgsDoubleBoxBarStyle<td>QgsDoubleBoxScaleBarRenderer
<tr><td>QgsEditorWidgetV2<td>QgsEditorWidget
<tr><td>QgsEllipseSymbolLayerV2<td>QgsEllipseSymbolLayer
<tr><td>QgsEllipseSymbolLayerV2Widget<td>QgsEllipseSymbolLayerWidget
<tr><td>QgsFavouritesItem<td>QgsFavoritesItem
<tr><td>QgsFeatureRendererV2<td>QgsFeatureRenderer
<tr><td>QgsFillSymbolLayerV2<td>QgsFillSymbolLayer
<tr><td>QgsFillSymbolV2<td>QgsFillSymbol
<tr><td>QgsFontMarkerSymbolLayerV2<td>QgsFontMarkerSymbolLayer
<tr><td>QgsFontMarkerSymbolLayerV2Widget<td>QgsFontMarkerSymbolLayerWidget
<tr><td>QgsGeometryCollectionV2<td>QgsGeometryCollection
<tr><td>QgsGeometryGeneratorSymbolLayerV2<td>QgsGeometryGeneratorSymbolLayer
<tr><td>QgsGradientFillSymbolLayerV2<td>QgsGradientFillSymbolLayer
<tr><td>QgsGradientFillSymbolLayerV2Widget<td>QgsGradientFillSymbolLayerWidget
<tr><td>QgsGraduatedSymbolRendererV2<td>QgsGraduatedSymbolRenderer
<tr><td>QgsGraduatedSymbolRendererV2Model<td>QgsGraduatedSymbolRendererModel
<tr><td>QgsGraduatedSymbolRendererV2ViewStyle<td>QgsGraduatedSymbolRendererViewStyle
<tr><td>QgsGraduatedSymbolRendererV2Widget<td>QgsGraduatedSymbolRendererWidget
<tr><td>QgsLabelingEngineV2<td>QgsLabelingEngine
<tr><td>QgsLegendModelV2<td>QgsLegendModel
<tr><td>QgsLegendSymbolItemV2<td>QgsLegendSymbolItem
<tr><td>QgsLineStringV2<td>QgsLineString
<tr><td>QgsLineSymbolLayerV2<td>QgsLineSymbolLayer
<tr><td>QgsLineSymbolV2<td>QgsLineSymbol
<tr><td>QgsMarkerLineSymbolLayerV2<td>QgsMarkerLineSymbolLayer
<tr><td>QgsMarkerLineSymbolLayerV2Widget<td>QgsMarkerLineSymbolLayerWidget
<tr><td>QgsMarkerSymbolLayerV2<td>QgsMarkerSymbolLayer
<tr><td>QgsMarkerSymbolV2<td>QgsMarkerSymbol
<tr><td>QgsMultiCurveV2<td>QgsMultiCurve
<tr><td>QgsMultiLineStringV2<td>QgsMultiLineString
<tr><td>QgsMultiSurfaceV2<td>QgsMultiSurface
<tr><td>QgsNumericScaleBarStyle<td>QgsNumericScaleBarRenderer
<tr><td>QgsPointSequenceV2<td>QgsPointSequence
<tr><td>QgsProperty<td>QgsProjectProperty
<tr><td>QgsPropertyKey<td>QgsProjectPropertyKey
<tr><td>QgsPropertyValue<td>QgsProjectPropertyValue
<tr><td>QgsRandomColorsV2<td>QgsRandomColorRamp
<tr><td>QgsRendererCategoryV2<td>QgsRendererCategory
<tr><td>QgsRendererRangeV2<td>QgsRendererRange
<tr><td>QgsRendererRangeV2LabelFomat<td>QgsRendererRangeLabelFomat
<tr><td>QgsRendererRangeV2LabelFormat<td>QgsRendererRangeLabelFormat
<tr><td>QgsRendererV2<td>QgsRenderer
<tr><td>QgsRendererV2AbstractMetadata<td>QgsRendererAbstractMetadata
<tr><td>QgsRendererV2CreateFromSldFunc<td>QgsRendererCreateFromSldFunc
<tr><td>QgsRendererV2CreateFunc<td>QgsRendererCreateFunc
<tr><td>QgsRendererV2DataDefinedMenus<td>QgsRendererDataDefinedMenus
<tr><td>QgsRendererV2Metadata<td>QgsRendererMetadata
<tr><td>QgsRendererV2PropertiesDialog<td>QgsRendererPropertiesDialog
<tr><td>QgsRendererV2PropsDialogBase<td>QgsRendererPropsDialogBase
<tr><td>QgsRendererV2Registry<td>QgsRendererRegistry
<tr><td>QgsRendererV2Widget<td>QgsRendererWidget
<tr><td>QgsRendererV2WidgetFunc<td>QgsRendererWidgetFunc
<tr><td>QgsRingSequenceV2<td>QgsRingSequence
<tr><td>QgsRuleBasedRendererV2<td>QgsRuleBasedRenderer
<tr><td>QgsRuleBasedRendererV2Count<td>QgsRuleBasedRendererCount
<tr><td>QgsRuleBasedRendererV2Model<td>QgsRuleBasedRendererModel
<tr><td>QgsRuleBasedRendererV2Widget<td>QgsRuleBasedRendererWidget
<tr><td>QgsScaleBarStyle<td>QgsScaleBarRenderer
<tr><td>QgsShapeburstFillSymbolLayerV2<td>QgsShapeburstFillSymbolLayer
<tr><td>QgsShapeburstFillSymbolLayerV2Widget<td>QgsShapeburstFillSymbolLayerWidget
<tr><td>QgsSimpleFillSymbolLayerV2<td>QgsSimpleFillSymbolLayer
<tr><td>QgsSimpleFillSymbolLayerV2Widget<td>QgsSimpleFillSymbolLayerWidget
<tr><td>QgsSimpleLineSymbolLayerV2<td>QgsSimpleLineSymbolLayer
<tr><td>QgsSimpleLineSymbolLayerV2Widget<td>QgsSimpleLineSymbolLayerWidget
<tr><td>QgsSimpleMarkerSymbolLayerV2<td>QgsSimpleMarkerSymbolLayer
<tr><td>QgsSimpleMarkerSymbolLayerV2Widget<td>QgsSimpleMarkerSymbolLayerWidget
<tr><td>QgsSingleBoxScaleBarStyle<td>QgsSingleBoxScaleBarRenderer
<tr><td>QgsSingleSymbolRendererV2<td>QgsSingleSymbolRenderer
<tr><td>QgsSingleSymbolRendererV2Widget<td>QgsSingleSymbolRendererWidget
<tr><td>QgsStyleV2<td>QgsStyle
<tr><td>QgsStyleV2ExportImportDialog<td>QgsStyleExportImportDialog
<tr><td>QgsStyleV2ExportImportDialogBase<td>QgsStyleExportImportDialogBase
<tr><td>QgsStyleV2GroupSelectionDialog<td>QgsStyleGroupSelectionDialog
<tr><td>QgsStyleV2ManagerDialog<td>QgsStyleManagerDialog
<tr><td>QgsStyleV2ManagerDialogBase<td>QgsStyleManagerDialogBase
<tr><td>QgsSurfaceV2<td>QgsSurface
<tr><td>QgsSvgMarkerSymbolLayerV2<td>QgsSvgMarkerSymbolLayer
<tr><td>QgsSvgMarkerSymbolLayerV2Widget<td>QgsSvgMarkerSymbolLayerWidget
<tr><td>QgsSymbolLayerV2<td>QgsSymbolLayer
<tr><td>QgsSymbolLayerV2AbstractMetadata<td>QgsSymbolLayerAbstractMetadata
<tr><td>QgsSymbolLayerV2Metadata<td>QgsSymbolLayerMetadata
<tr><td>QgsSymbolLayerV2Registry<td>QgsSymbolLayerRegistry
<tr><td>QgsSymbolLayerV2Utils<td>QgsSymbolLayerUtils
<tr><td>QgsSymbolLayerV2Widget<td>QgsSymbolLayerWidget
<tr><td>QgsSymbolLevelsV2Dialog<td>QgsSymbolLevelsDialog
<tr><td>QgsSymbolV2LegendNode<td>QgsSymbolLegendNode
<tr><td>QgsSymbolV2LevelItem<td>QgsSymbolLevelItem
<tr><td>QgsSymbolV2RenderContext<td>QgsSymbolRenderContext
<tr><td>QgsSymbolV2SelectorDialog<td>QgsSymbolSelectorDialog
<tr><td>QgsSymbolV2SelectorWidget<td>QgsSymbolSelectorWidget
<tr><td>QgsTicksScaleBarStyle<td>QgsTicksScaleBarRenderer
<tr><td>QgsVectorColorBrewerColorRampV2<td>QgsColorBrewerColorRamp
<tr><td>QgsVectorColorBrewerColorRampV2Dialog<td>QgsColorBrewerColorRampDialog
<tr><td>QgsVectorColorBrewerColorRampV2DialogBase<td>QgsColorBrewerColorRampDialogBase
<tr><td>QgsVectorColorRampV2<td>QgsColorRamp
<tr><td>QgsVectorColorRampV2Map<td>QgsVectorColorRampMap
<tr><td>QgsVectorGradientColorRampV2<td>QgsGradientColorRamp
<tr><td>QgsVectorGradientColorRampV2Dialog<td>QgsGradientColorRampDialog
<tr><td>QgsVectorGradientColorRampV2DialogBase<td>QgsGradientColorRampDialogBase
<tr><td>QgsVectorGradientRampV2<td>QgsVectorGradientRamp
<tr><td>QgsVectorJoinInfo<td>QgsVectorLayerJoinInfo
<tr><td>QgsVectorLayerImport<td>QgsVectorLayerExporter
<tr><td>QgsVectorLayersetRendererV2<td>QgsVectorLayersetRenderer
<tr><td>QgsVectorRandomColorRampV2<td>QgsLimitedRandomColorRamp
<tr><td>QgsVectorRandomColorRampV2Dialog<td>QgsLimitedRandomColorRampDialog
<tr><td>QgsVectorRandomColorRampV2DialogBase<td>QgsLimitedRandomColorRampDialogBase
<tr><td>QgsSymbolV2<td>QgsSymbol
<tr><td>QgsArcProperter<td>QgsStrategy
<tr><td>QgsDistanceArcProperter<td>QgsDistanceStrategy
<tr><td>QgsGraphArc<td>QgsGraphEdge
</table>
<table>
<caption id="renamed_enum_values">Renamed enum values</caption>
<tr><th>class</th><th>API 2.x<th>API 3.X
<tr><td>QgsLayerTreeModelLegendNode<td>SymbolV2LegacyRuleKeyRole<td>SymbolLegacyRuleKeyRole
<tr><td>QgsVectorLayer<td>EditorWidgetV2<td>EditorWidget
</table>
<table>
<caption id="renamed_methods">Renamed method names</caption>
<tr><th>class</th><th>API 2.x<th>API 3.X
<tr><td>QgsAnnotation<td>mapPositionFixed<td>hasFixedMapPosition
<tr><td>QgsApplication<td>defaultStyleV2Path<td>defaultStylePath
<tr><td>QgsApplication<td>userStyleV2Path<td>userStylePath
<tr><td>QgsComposerShape<td>setUseSymbolV2<td>setUseSymbol
<tr><td>QgsIFeatureSelectionManager<td>selectedFeaturesIds<td>selectedFeatureIds
<tr><td>QgsMapLayer<td>capitaliseLayerName<td>capitalizeLayerName <!--#spellok-->
<tr><td>QgsSymbolLayerUtils<td>createSymbolLayerV2ListFromSld<td>createSymbolLayerListFromSld
<tr><td>QgsVectorLayer<td>editorWidgetV2Config<td>editorWidgetConfig
<tr><td>QgsVectorLayer<td>editorWidgetV2Text<td>editorWidgetText
<tr><td>QgsVectorLayer<td>editorWidgetV2Type<td>editorWidgetType
<tr><td>QgsVectorLayer<td>deleteVertexV2<td>deleteVertex
<tr><td>QgsVectorLayer<td>rendererV2<td>renderer
<tr><td>QgsVectorLayer<td>selectedFeaturesIds<td>selectedFeatureIds
<tr><td>QgsVectorLayerEditUtils<td>deleteVertexV2<td>deleteVertex
<tr><td>QgsComposerSymbolItem<td>symbolV2<td>symbol
<tr><td>QgsServerInterface<td>capabiblitiesCache<td>capabilitiesCache
<tr><td>QgsGraphEdge<td>property<td>cost
<tr><td>QgsGraphEdge<td>properties<td>strategies
<tr><td>QgsGraphVertex<td>outArc<td>outEdges
<tr><td>QgsGraphVertex<td>inArc<td>inEdges
<tr><td>QgsGraph<td>addArc<td>addEdges
<tr><td>QgsGraph<td>arcCount<td>edgeCount
<tr><td>QgsGraph<td>arc<td>edge
<tr><td>QgsGraphBuilder<td>addArc<td>addEdge
<tr><td>QgsGraphBuilderInterface<td>addArc<td>addEdge
<tr><td>QgsGraphDirectory<td>addProperter<td>addStrategy
<tr><td>QgsRequestHandler<td>getHeader<td>header
<tr><td>QgsStrategy<td>addProperter<td>addStrategy
</table>
Removed Classes {#qgis_api_break_3_0_removed_classes}
---------------
- QgsAnnotationItem was removed. This was replaced by QgsAnnotation and QgsMapCanvasAnnotationItem.
- QgsAttributeAction was removed, and replaced by QgsActionManager.
- QgsAttributeEditor was removed. Use QgsEditorWidgetRegistry::create() instead.
- QgsColorbutton was removed. QgsColorButtonV2 has now been renamed to QgsColorButton. Hence, QgsColorButtonV2 does not exist anymore.
- QgsColorDialog was removed, and QgsColorDialogV2 was renamed to QgsColorDialog. Hence, QgsColorButtonV2 does not exist anymore.
All the functionality from the old QgsColorDialog has been moved to the new class.
- QgsColorRampComboBox was removed, replaced by QgsColorRampButton
- QgsComposerAttributeTable and associated classes (eg QgsComposerAttributeTableCompare,
QgsComposerAttributeTableColumnModel, QgsComposerTableSortColumnsProxyModel) were removed.
Use QgsComposerAttributeTableV2 instead.
- QgsComposerLegendItem and subclasses were removed (QgsComposerSymbolItem, QgsComposerRasterSymbolItem, QgsComposerLayerItem, QgsComposerGroupItem, QgsComposerStyleItem).
- QgsComposerTable was removed. Use QgsComposerAttributeTableV2 instead.
- ComposerTextTable was removed. Use ComposerTextTableV2 instead.
- QgsCRSCache was removed. QgsCoordinateReferenceSystem now internally uses a cache for CRS creation,
so there is no longer a need for the separate cache class. Code which previously called QgsCRSCache::updateCRSCache()
should now call QgsCoordinateReferenceSystem::invalidateCache() and QgsCoordinateTransformCache::instance()->invalidateCrs( authid ).
- QgsDataDefined was removed. Use the QgsProperty framework instead.
- QgsDataDefinedButton was removed. Use QgsPropertyOverrideButton instead.
- QgsDataDefinedSymbolDialog was removed. Code using this dialog should be reworked to use QgsPropertyOverrideButton
- QgsFileNameWidgetWrapper was removed. Use QgsExternalResourceWidgetWrapper instead.
- QgsFormAnnotationItem. Use QgsFormAnnotation instead.
- QgsHtmlAnnotationItem. Use QgsHtmlAnnotation instead.
- QgsHttpTransaction. This class was outdated and code should be ported to native Qt or Python implementations.
- QgsGenericProjectionSelector. Use QgsProjectionSelectionTreeWidget instead.
- QgsGeometryCache. It got redundant after removal of old snapping classes (QgsSnapper + friends).
- QgsLabel and QgsLabelAttributes. Replaced by labeling based on PAL library, see QgsLabelingEngine.
- QgsLabelingEngineInterface. Replaced by QgsLabelingEngine.
- QgsLegendInterface was removed. It was replaced by layer tree API (QgsLayerTreeNode class and others).
Methods that deal with custom actions in main window's layer tree context menu were moved to QgisInterface:
- addLegendLayerAction() moved to QgisInterface::addCustomActionForLayerType()
- addLegendLayerActionForLayer() moved to QgisInterface::addCustomActionForLayer()
- removeLegendLayerAction() moved to QgisInterface::removeCustomActionForLayerType()
- QgsLegendModel was removed.
- QgsMapCanvasLayer. Map canvas and overview canvas are updated separately with their own setLayers() calls.
- QgsMapCanvasMap. It is an internal class used by map canvas.
- QgsMapLayerRegistry. Its functionality has been moved to QgsProject.
- QgsMapRenderer. It has been replaced by QgsMapRendererJob with subclasses and QgsMapSettings.
- QgsMapToolTouch. The touch navigation functionality is now built into the standard QgsMapToolPan tool.
- QgsPhotoWidgetWrapper was removed. Use QgsExternalResourceWidgetWrapper instead.
- QgsPseudoColorShader. This shader has been broken for some time and was replaced by QgsSingleBandPseudoColorRenderer.
- QgsProjectBadLayerGuiHandler was removed. It was unused in QGIS code and barely useful. Implement your own QgsProjectBadLayerHandler subclass if needed.
- QgsRendererV2DataDefinedMenus was removed. Use QgsPropertyOverrideButton instead.
- QgsSizeScaleWidget. Use QgsPropertyAssistantWidget instead.
- QgsLegacyHelpers.
- QgsProjectionSelector. Use QgsProjectionSelectionDialog instead.
- QgsProviderCountCalcEvent and QgsProviderExtentCalcEvent. These classes were unused in QGIS core and unmaintained.
- QgsWebviewWidgetWrapper was removed. Use QgsExternalResourceWidgetWrapper instead.
- QgsEditorWidgetConfig was removed. Use QVariantMap instead.
- QgsScaleExpression. Use QgsProperty with a QgsSizeScalePropertyTransformer instead.
- QgsSvgAnnotationItem. Use QgsSvgAnnotation instead.
- QgsSymbologyV2Conversion was removed. Reading of renderers from pre-1.0 versions is not supported anymore.
- QgsTextAnnotationItem. Use QgsTextAnnotation instead.
- QgsSnapper. Use QgsSnappingUtils instead.
- QgsSnappingResult. Use QgsSnappingUtils instead.
- QgsMapCanvasSnapper. Use QgsMapCanvas::snappingUtils() instead.
General changes {#qgis_api_break_3_0_global}
---------------
- All setDestinationCRS() methods have been renamed to setDestinationCrs()
- All destinationCRS() methods have been renamed to destinationCrs()
- All readXML() and _readXML() methods have been renamed to readXml() and _readXml()
- All writeXML() and _writeXML() methods have been renamed to writeXml() and _writeXml()
- All setLayerID() methods have been renamed to setLayerId()
- All layerID() methods have been renamed to layerId()
- All setCRS() methods have been renamed to setCrs()
- All srcCrs() methods have been renamed to sourceCrs()
- All destCrs() methods have been renamed to destinationCrs()
- All exportXML() methods have been renamed to exportXml()
- All importXML() methods have been renamed to importXml()
- All methods relating to "border" or "outline" color or width have been renamed to stroke
- All methods taking or returning QGis::WkbType have been changed to use QgsWkbTypes::Type
- All methods taking or returning QGis::GeometryType have been changed to use QgsWkbTypes::GeometryType
- Network analysis library has been merged into analysis library
Labeling {#qgis_api_break_3_0_Labeling}
--------
Labeling of vector layers used to be configured in 2.x using setCustomProperties() method with various
lots of options prefixed with "labeling" keyword, for example: layer.setCustomProperties("labeling/fieldName", "my_field").
While 2.x projects and .qml files containing configuration using custom properties will still work,
calling these API methods will have no effect on layer's labeling configuration anymore: all settings
are now stored in objects derived from QgsAbstractVectorLayerLabeling:
- QgsVectorLayerSimpleLabeling - when all features are labeled the same way
- QgsRuleBasedLabeling - rule-based labeling
The current configuration of labeling can be queried with vector layer's labeling() method and modified with
setLabeling() method.
Data Providers {#qgis_api_break_3_0_DataProviders}
--------------
- Many methods in QgsDataProvider, QgsVectorDataProvider and QgsRasterDataProvider have been made const-correct.
This has no effect on PyQGIS code, but c++ code implementing third-party providers will need to update the
signatures of these methods to match. Affected methods are:
- QgsDataProvider: crs(), extent(), isValid(), supportsSubsetString(), subsetString()
- QgsVectorDataProvider: getFeatures(), minimumValue(), maximumValue(), uniqueValues(), enumValues(), defaultValue(),
attributeIndexes(), pkAttributeIndexes(), isSaveAndLoadStyleToDatabaseSupported()
- QgsRasterInterface: extent()
- Many protected member variables have been wrapped in setter/getter methods.
This should generally only affect 3rd party providers
- mCacheMinMaxDirty: use clearMinMaxCache()
- mNativeTypes: use setNativeTypes()
- mAttrPalIndexName: overwrite palAttributeIndexNames()
Qgis {#qgis_api_break_3_0_Qgis}
----
- The QGis class was renamed to Qgis for capitalization consistency with other class names
- permissiveToDouble() and permissiveToInt() where moved out of the QGis class and renamed to qgsPermissiveToDouble() and
qgsPermissiveToInt()
- The constants DEFAULT_IDENTIFY_RADIUS and MINIMUM_POINT_SIZE were removed
- QGis::DecimalDegrees, DegreesMinutesSeconds and DegreesDecimalMinutes have been removed, and have all been replaced
with the general Degrees unit
- The distance unit types QGis::UnitType (including QGis::Meters, QGis::Feet, QGis::Degrees, QGis::NauticalMiles,
QGis::Kilometers, QGis::Yards, QGis::Miles and QGis::UnknownUnit have been moved to QgsUnitTypes::DistanceUnit.
Some of these unit types have also been renamed - see the notes on QgsUnitTypes below. All methods which accepted
QGis::UnitType parameters have been updated to take QgsUnitTypes::DistanceUnit instead.
- The unit handling methods toLiteral, fromLiteral, tr, fromTr, fromUnitToUnitFactor have been removed. Their
corresponding counterparts in QgsUnitTypes should be used instead.
- The enum QGis::WkbType has been removed in favor of QgsWkbTypes::Type
- The enum QGis::GeometryType has been removed in favor of QgsWkbTypes::GeometryType
- singleType() has been removed. Use the equivalent QgsWkbTypes::singleType() instead
- multiType() has been removed. Use the equivalent QgsWkbTypes::multiType() instead
- flatType() has been removed. Use the equivalent QgsWkbTypes::flatType() instead
- isSingleType() has been removed. Use the equivalent QgsWkbTypes::issingleType() instead
- isMultiType() has been removed. Use the equivalent QgsWkbTypes::isMultiType() instead
- wkbDimensions() has been removed. Use the equivalent QgsWkbTypes::coordDimensions() instead
- fromOldWkbType() has been removed. This is no longer required.
- fromNewWkbType() has been removed. This is no longer required.
- vectorGeometryType() has been removed. Use the equivalent QgsWkbTypes::geometrydisplayString() instead.
- featureType() has been removed. Use the equivalent QgsWkbTypes::displayString() instead.
QgisInterface {#qgis_api_break_3_0_QgisInterface}
-------------
- fileMenu() has been removed, use projectMenu() instead.
- actionRemoveLayer was removed as it no longer exists.
- actionTouch was removed, as the corresponding action no longer exists (see notes on QgsMapToolTouch)
- activeComposers(), createNewComposer(), duplicateComposer(), deleteComposer(), composerAdded(),
composerWillBeRemoved(), composerRemoved() were all removed. Composer windows are now only created
on demand, and destroyed when the window is closed. The new interface methods openComposers(),
openComposer(), closeComposer(), composerOpened(), composerWillBeClosed() and composerClosed()
are similar, but only apply to composer windows when they are exist. To access all compositions
from a project, the new QgsProject.instance().layoutManager() class should be used instead.
Additionally, the new interface methods work with QgsComposerInterface objects instead
of QgsComposerView objects.
- interaction with the main window status bar should no longer use the native Qt statusBar() method.
Instead iface.statusBarIface() should be used.
CharacterWidget {#qgis_api_break_3_0_CharacterWidget}
-------------------
- getColumns() was renamed to columns()
- getSquareSize() was renamed to squareSize()
- updateFont() was renamed to setFont()
- updateSize() was renamed to setFontSize()
- updateStyle() was renamed to setFontStyle()
- updateColumns() was renamed to setColumns()
QgsAbstractGeometry {#qgis_api_break_3_0_QgsAbstractGeometry}
-------------------
- asWkb() returns QByteArray instead of new raw pointer
- wkbSize() has been removed, use asWkb() to get length of returned QByteArray
- fromWkb() gets the WKB pointer passed by reference instead of value, so that caller may to find out where the parsing ended
QgsActionManager {#qgis_api_break_3_0_QgsActionManager}
----------------
- `doAction()` no longer accepts a substitution map. Use expression context
variables instead.
- The `doAction()` variant which takes a QgsFeature along has been removed. Use
the expression context variant instead.
- `expandAction()` has been removed. Use
`QgsExpression::replaceExpressionText()` instead.
- `setPythonExecute()` was removed. Initialize `QgsPythonRunner` instead.
- `QgsActionManager::listActions()` has been renamed to `QgsActionManager::actions( actionScope )`.
- `QgsActionManager::removeAction()` takes an actions UUID instead of an index.
- `QgsActionManager::doAction()` takes an actions UUID instead of an index.
- `QgsActionManager::writeXml()` no longer takes a QDomDocument. The document is
extracted from the layerNode.
- `QgsActionManager::at()` has been removed. Use `QgsActionManager::action( id )`
to get an action by its UUID.
- `QgsActionManager::defaultAction()` works on a per-scope basis and with UUIDs
instead of indexes.
QgsAction {#qgis_api_break_3_0_QgsAction}
---------
- `QgsAction::action()` has been renamed to `QgsAction::command()`.
- `QgsAction::showInAttributeTable()` has been removed. Use
`QgsAction::actionScopes()` instead and check for the 'Feature' scope.
QgsAdvancedDigitizingDockWidget {#qgis_api_break_3_0_QgsAdvancedDigitizingDockWidget}
-------------------------------
- canvasReleaseEvent takes now QgsAdvancedDigitizingDockWidget::CaptureMode as second argument.
QgsApplication {#qgis_api_break_3_0_QgsApplication}
--------------
- qgisMasterDbFilePath() was renamed to qgisMasterDatabaseFilePath()
- qgisMasterDatabaseFilePath() was renamed to qgisUserDatabaseFilePath()
- qgisAuthDbFilePath() was renamed to qgisAuthDatabaseFilePath()
- srsDbFilePath() was renamed to srsDatabaseFilePath()
- setAuthDbDirPath() was renamed to setAuthDatabaseDirPath()
- createDB() was renamed to createDatabase()
QgsAtlasComposition {#qgis_api_break_3_0_QgsAtlasComposition}
-------------------
- readXMLMapSettings() was removed. QGIS no longer supports upgrading pre 2.2 compositions and if this is a
requirement the projects should first be upgraded by opening and saving in 2.18.
- composerMap() and setComposerMap() were removed. Use QgsComposerMap::atlasDriven() and setAtlasDriven()
instead
- fixedScale() and setFixedScale() were removed. Use QgsComposerMap::atlasScalingMode() and setAtlasScalingMode()
instead
- margin() and setMargin() were removed. Use QgsComposerMap::atlasMargin() and setAtlasMargin()
instead
- setSortKeyAttributeIndex() and sortKeyAttributeIndex() were removed. Use sortKeyAttributeName()
and setSortKeyAttributeName() instead.
- currentFeature() was removed. Use feature() instead.
QgsAttributeDialog {#qgis_api_break_3_0_QgsAttributeDialog}
------------------
- The constructor for QgsAttributeDialog has changed
- dialog() was removed - just use the object directly.
- setIsAddDialog() was removed. Use setMode() instead.
QgsAttributeForm {#qgis_api_break_3_0_QgsAttributeForm}
----------------
- setIsAddDialog() was removed. Use setMode() instead.
- accept() was removed. Use save() instead.
- reject() was removed. Use resetValues() instead.
QgsAuthConfigUriEdit {#qgis_api_break_3_0_QgsAuthConfigUriEdit}
--------------------
- hasConfigID() has been renamed to hasConfigId()
QgsAuthManager {#qgis_api_break_3_0_QgsAuthManager}
--------------
- authDbConnection() was renamed to authDatabaseConnection()
- authDbConfigTable() was renamed to authDatabaseConfigTable()
- authDbServersTable() was renamed to authDatabaseServersTable()
- authenticationDbPath() was renamed to authenticationDatabasePath()
- masterPasswordHashInDb() was renamed to masterPasswordHashInDatabase()
- scheduledAuthDbErase() was renamed to scheduledAuthDatabaseErase()
- setScheduledAuthDbErase() was renamed to setScheduledAuthDatabaseErase()
- setScheduledAuthDbEraseRequestEmitted() was renamed to setScheduledAuthDatabaseEraseRequestEmitted()
QgsAuthMethod {#qgis_api_break_3_0_QgsAuthMethod}
-------------
- DataSourceURI has been renamed to DataSourceUri
- GenericDataSourceURI has been renamed to GenericDataSourceUri
QgsBrowserModel {#qgis_api_break_3_0_QgsBrowserModel}
---------------
- addFavouriteDirectory has been renamed to addFavoriteDirectory
- removeFavourite has been renamed to removeFavorite
QgsCachedFeatureIterator {#qgis_api_break_3_0_QgsQgsCachedFeatureIterator}
------------------------
- The constructor for QgsCachedFeatureIterator has changed.
QgsCategorizedRenderer {#qgis_api_break_3_0_QgsCategorizedRenderer}
--------------------
- setInvertedColorRamp() and invertedColorRamp() functions are gone, QgsColorRamp now responsible for invert
- createRenderer() and updateColorRamp()'s inverted parameter is gone
QgsCategorizedSymbolRendererWidget {#qgis_api_break_3_0_QgsCategorizedSymbolRendererWidget}
----------------------------------
- sizeScaleFieldChanged() and scaleMethodChanged() were removed. These settings are no longer exposed in the widget's GUI.
- getColorRamp() was removed.
QgsClipper {#qgis_api_break_3_0_QgsClipper}
----------
- clippedLineWKB has been renamed to clippedLine and it's signature has been changed to return a QPolygonF
QgsColorBrewerColorRampDialog {#qgis_api_break_3_0_QgsColorBrewerColorRampDialog}
-----------------------------
- The dialog no longer edits a color ramp in place. Instead, a copy of the ramp is edited
and the new ramp can be retrieved after executing the dialog by calling ramp().
- Some internal methods which were previously public or protected were made private.
QgsColorBrewerPalette {#qgis_api_break_3_0_QgsColorBrewerPalette}
---------------------
- brewerString was renamed to BREWER_STRING
QgsColorButton {#qgis_api_break_3_0_QgsColorButton}
--------------
- Behaviour enum and its corresponding setter/getter have been renamed to Behavior <!--#spellok-->
QgsColorRampShader {#qgis_api_break_3_0_QgsColorRampShader}
------------------
- maximumColorCacheSize() and setMaximumColorCacheSize() were no longer used and are removed.
- ColorRamp_TYPE enum was renamed to Type, and its value names decapitalized
QgsColorSchemeRegistry {#qgis_api_break_3_0_QgsColorSchemeRegistry}
----------------------
- This class is no longer a singleton and instance() has been removed. Instead use QgsApplication::colorSchemeRegistry() to access an application-wide registry.
QgsComposerArrow {#qgis_api_break_3_0_QgsComposerArrow}
----------------
- setOutlineWidth(), outlineWidth(), arrowColor() and setArrowColor() were removed.
Use setArrowHeadOutlineWidth(), arrowHeadOutlineWidth(), arrowHeadOutlineColor(),
setArrowHeadOutlineColor(), arrowHeadFillColor(), setArrowHeadFillColor(),
setLineSymbol() or lineSymbol() instead.
QgsComposerAttributeTableV2 {#qgis_api_break_3_0_QgsComposerAttributeTableV2}
---------------------------
- setDisplayAttributes() was removed. Use setDisplayedFields() instead.
QgsComposerItem {#qgis_api_break_3_0_QgsComposerItem}
---------------
- zoomContent( int delta, double x, double y ) was removed. Use zoomContent( double, QPointF, ZoomMode )
instead.
- drawText(), textWidthMillimeters(), fontHeightCharacterMM(), fontAscentMillimeters(),
fontDescentMillimeters(), fontHeightMillimeters(), pixelFontSize(), scaledFontPixelSize(),
drawArrowHead(), angle(), largestRotatedRectWithinBounds(), and rotate() were removed.
Use the corresponding methods in QgsComposerUtils instead.
- rotation() and setRotation() were removed. Use itemRotation() and setItemRotation()
instead.
- lockSymbolSize(), imageSizeConsideringRotation(), cornerPointOnRotatedAndScaledRect(),
sizeChangedByRotation() were removed. No replacement is offered for these methods.
QgsComposerLabel {#qgis_api_break_3_0_QgsComposerLabel}
----------------
- setExpressionContext() has been removed. Setup the composition using an atlas and with
expression variables in the composer label item instead.
- setSubstitutions has been removed. Use expression context variables in the composer
label item instead.
- margin() was removed. Use marginX() and marginY() instead.
QgsComposerLegend {#qgis_api_break_3_0_QgsComposerLegend}
-----------------
- model() now returns the new QgsLegendModel (previously QgsLegendModelV2, see \ref qgis_api_break_3_0_renamed_classes).
- modelV2() has been renamed to model().
QgsComposerLegendItem {#qgis_api_break_3_0_QgsComposerLegendItem}
---------------------
- writeXMLChildren() has been renamed to writeXmlChildren()
QgsComposerMap {#qgis_api_break_3_0_QgsComposerMap}
--------------
- layerSet() and setLayerSet() have been replaced by layers() and setLayers() which work with list of layers instead of layer IDs
- containsWMSLayer() has been renamed to containsWmsLayer()
- mapRenderer() has been removed. Use mapSettings() instead.
- All grid style and format enums were moved to QgsComposerMapGrid.
- All grid property getters and setters were moved to QgsComposerMapGrid,
and should be accessed using QgsComposerMap::grid() or QgsComposerMap::grids().
- All overview property getters and setters were moved to QgsComposerMapOverview,
and should be accessed using QgsComposerMap::overview() or QgsComposerMap::overviews().
- overviewExtentChanged() was moved to QgsComposerMapOverview.
- toggleAtlasPreview(), connectMapOverviewSignals() were no longer required and are removed.
- setRotation() and rotation() were removed. Use setMapRotation() and mapRotation()
instead.
- atlasFixedScale() and setAtlasFixedScale() were removed. Use atlasScalingMode()
and setAtlasScalingMode() instead.
- storeCurrentLayerSet() was removed. Use setLayers() instead.
- The layersChanged() slot was removed.
- setMapCanvas() was removed. This is no longer required to draw map annotations, which are instead retrieved from the composition's
associated project's annotationManager()
- setDrawCanvasItems() and drawCanvasItems() were renamed to setDrawAnnotations() and drawAnnotations()
- setCacheUpdated(), updateCachedImage(), renderModeUpdateCachedImage() and cache() were removed. Use invalidateCache() instead.
- The PreviewMode mode enums were removed. These are no longer used.
- previewMode() and setPreviewMode() were removed. These are no longer required.
QgsComposerMapGrid {#qgis_api_break_3_0_QgsComposerMapGrid}
------------------
- The annotation position Disabled was removed. QgsComposerMapGrid::HideAll
should be used instead.
QgsComposerMultiFrame {#qgis_api_break_3_0_QgsComposerMultiFrame}
---------------------
- render( QPainter* p, const QRectF& renderExtent ) was removed. Use
render( QPainter* painter, const QRectF& renderExtent, const int frameIndex )
instead.
- render( QPainter* painter, const QRectF& renderExtent, const int frameIndex )
was made pure virtual.
QgsComposerNodesItem {#qgis_api_break_3_0_QgsComposerNodesItem}
--------------------
- _readXMLStyle() has been renamed to _readXmlStyle()
- _writeXMLStyle() has been renamed to _writeXMLStyle()
- unselectNode() has been renamed to deselectNode() <!--#spellok-->
QgsComposerObject {#qgis_api_break_3_0_QgsComposerObject}
-----------------
- dataDefinedProperty() and setDataDefinedProperty() no longer use QgsDataDefined objects.
Instead these methods have been ported to the QgsProperty framework.
- dataDefinedEvaluate() was removed. Use the QgsProperty evaluation methods instead.
QgsComposerPicture {#qgis_api_break_3_0_QgsComposerPicture}
------------------
- setPictureFile() and pictureFile() were removed. Use setPicturePath()
and picturePath() instead.
- rotation() and setRotation() were removed. Use pictureRotation()
and setPictureRotation() instead.
- usePictureExpression() and pictureExpression() were removed. Use
QgsComposerObject::dataDefinedProperty instead.
- setUsePictureExpression() was removed. Use
QgsComposerObject::setDataDefinedProperty() instead.
- updatePictureExpression() was removed.
QgsComposerScaleBar {#qgis_api_break_3_0_QgsComposerScaleBar}
-------------------
- The Alignment and SegmentSizeMode enums were moved to QgsScaleBarSettings
- The ScaleBarUnits enum was removed. Use QgsUnitTypes::DistanceUnit instead.
- setBrush() was removed. Use setFillColor() instead.
- setBrush2() was removed. Use setFillColor2() instead.
- setPen() was removed. Use setLineColor() and setLineWidth() instead.
- segmentMillimeters() and firstLabelString() were removed.
QgsComposerTable {#qgis_api_break_3_0_QgsComposerTable}
----------------
- tableWriteXML() has been renamed to tableWriteXml()
- tableReadXML() has been renamed to tableReadXml()
QgsComposerTableV2 {#qgis_api_break_3_0_QgsComposerTableV2}
------------------
- rowsVisible(), rowRange(), drawHorizontalGridLines() and
drawVerticalGridLines() were removed.
- WrapBehaviour enum and its setter and getter methods has been renamed to WrapBehavior <!--#spellok-->
- EmptyTableBehaviour enum and its setter and getter methods has been renamed to EmptyTableBehavior <!--#spellok-->
QgsComposerView {#qgis_api_break_3_0_QgsComposerView}
--------------------
- unselectNode() has been renamed to deselectNode() <!--#spellok-->
QgsComposerUtils {#qgis_api_break_3_0_QgsComposerUtils}
-----------------
- readDataDefinedPropertyMap() was renamed to readOldDataDefinedPropertyMap() and the signature has changed
to use a QgsPropertyCollection object.
- readDataDefinedProperty() was renamed to readOldDataDefinedProperty() and the signature has changed
to use the QgsProperty framework objects.
- writeDataDefinedPropertyMap() was removed. This is now handled by QgsPropertyCollection::writeXml()
QgsComposition {#qgis_api_break_3_0_QgsComposition}
--------------
- The constructor no longer takes a reference to a QgsMapSettings object. This is no longer
used by compositions. To set the layers to show in composer maps, the QgsComposerMap::setLayers()
method should be used instead.
- constructor requires QgsProject instance
- addItemsFromXML() has been renamed to addItemsFromXml()
- Constructor with QgsMapRenderer parameter has been removed. Use the variant with QgsMapSettings parameter.
- mapRenderer() has been removed. Use mapSettings() instead.
- setSnapGridTolerance(), setAlignmentSnapTolerance(), alignmentSnapTolerance() and snapGridTolerance()
were removed. Use setSnapTolerance() and snapTolerance() instead.
- getComposerHtmlByItem() was removed. Use QgsComposerFrame::multiFrame() instead.
- pixelFontSize(), pointFontSize(), relativeResizeRect(), relativePosition() were removed. Use the corresponding methods in QgsComposerUtils instead.
- sortZList() was removed. Use refreshZList() instead.
- addComposerTable(), composerTableAdded() were removed.
- setAllUnselected() has been renamed to setAllDeselected. <!--#spellok-->
- worldFileMap() and setWorldFileMap() have been renamed to referenceMap() and setReferenceMap()
- dataDefinedProperty() and setDataDefinedProperty() now use the QgsProperty framework instead
of QgsDataDefined objects.
- mapSettings() was removed. Use QgsComposerMap::mapSettings() instead.
- The composerArrowAdded, composerPolygonAdded, composerPolylineAdded, composerHtmlFrameAdded, composerItemGroupAdded,
composerLabelAdded, composerMapAdded, composerScaleBarAdded, composerLegendAdded, composerPictureAdded,
composerShapeAdded, and composerTableFrameAdded were removed. Use the general itemAdded signal instead to catch
all these item added events.
- addComposerMap no longer takes a setDefaultPreviewStyle argument.
- the mapsToRestore parameter has been removed from addItemsFromXml
QgsConditionalLayerStyle {#qgis_api_break_3_0_QgsConditionalLayerStyle}
------------------------
- readXml() and writeXml() require a new argument: a reference to QgsReadWriteContext
QgsConditionalStyle {#qgis_api_break_3_0_QgsConditionalStyle}
-------------------
- readXml() and writeXml() require a new argument: a reference to QgsReadWriteContext
QgsCoordinateReferenceSystem {#qgis_api_break_3_0_QgsCoordinateReferenceSystem}
----------------------------
- QgsCoordinateReferenceSystem now uses internal caches to avoid expensive database lookups
when CRS objects are initialized. This is handled internally, but invalidateCache() must be
called if changes are made to the CRS database.
- setCustomSrsValidation() has been renamed to setCustomCrsValidation()
- saveAsUserCRS() has been renamed to saveAsUserCrs()
- geographicCRSAuthId() has been renamed to geographicCrsAuthId()
- geographicFlag() was renamed to isGeographic()
- axisInverted() was renamed to hasAxisInverted()
- syncDb() was renamed to syncDatabase()
QgsCoordinateTransform {#qgis_api_break_3_0_QgsCoordinateTransform}
----------------------
- QgsCoordinateTransform is no longer a QObject. readXml, writeXml and initialize are all normal public members now,
not slots. The invalidTransformInput() signal has been removed.
- The extra QgsCoordinateTransform constructors (those not taking QgsCoordinateReferenceSystem arguments) have been
removed. Now, QgsCoordinateTransform must be created using an already existing source and destination
QgsCoordinateReferenceSystem object.
- QgsCoordinateTransform::clone() has been removed. Just use direct copies instead.
- sourceCrs() and destCrs() now return a copy instead of a reference to the CRS. This has no effect on PyQGIS code, but c++
plugins calling these methods will need to be updated.
- isInitialised() has been renamed to isValid() <!--#spellok-->
- theCRS parameter in setSourceCrs has been renamed to 'crs'
- setDestCRS() has been renamed to setDestinationCrs() for consistency
- destCRS() has been renamed to destinationCrs() for consistency
- theSource, theDest, theSourceSrsId, theDestSrsId, theSourceWkt, theDestWkt, theSourceCRSType parameters in the QgsCoordinateTransform constructors have been renamed to source, destination, sourceSrsId, destinationSrsId, sourceWkt, destinationWkt, sourceCrsType respectively
- 'p' argument in transform() has been renamed to 'point', 'theRect' to 'rectangle', 'poly' to 'polygon'
- setDestCRSID has been removed, use setDestinationCrs() instead
- 'theNode', 'theDoc' parameters in readXML and writeXML have been renamed to 'node' and 'document' respectively
- readXML() and writeXML() have been renamed to readXml() and writeXml() for consistency
QgsCoordinateTransformCache {#qgis_api_break_3_0_QgsCoordinateTransformCache}
---------------------------
- transform() now returns a QgsCoordinateTransform object, not a pointer. An invalid QgsCoordinateTransform will
be returned in place of a null pointer.
QgsCptCityColorRamp {#qgis_api_break_3_0_QgsCptCityColorRamp}
-------------------
- The constructor's doLoadFile parameter order has changed due to the addition of an inverted parameter
QgsCptCityColorRampDialog {#qgis_api_break_3_0_QgsCptCityColorRampDialog}
-------------------------
- The dialog no longer edits a color ramp in place. Instead, a copy of the ramp is edited
and the new ramp can be retrieved after executing the dialog by calling ramp().
- Some internal methods which were previously public or protected were made private.
QgsCptCityDataItem {#qgis_api_break_3_0_QgsCptCityDataItem}
-----------------------
- emitBeginInsertItems, emitEndInsertItems, emitBeginRemoveItems and emitEndRemoveItems were removed. There
should be no need to call these slots manually.
QgsCptCitySelectionItem {#qgis_api_break_3_0_QgsCptCitySelectionItem}
-----------------------
- parseXML() has been renamed to parseXml()
QgsCustomLayerOrderWidget {#qgis_api_break_3_0_QgsCustomLayerOrderWidget}
-------------------------
- the signature of the visibilityChanged() signal is changed to visibilityChanged( QgsLayerTreeNode *node )
QgsCRSCache {#qgis_api_break_3_0_QgsCRSCache}
-----------
- QgsCRSCache has been dropped. QgsCoordinateReferenceSystem now has an internal cache
QgsCursors {#qgis_api_break_3_0_QgsCursors}
---------
- remove old bitmap cursors pan and pan_mask. Use window system curosrs instead.
QgsDataDefined {#qgis_api_break_3_0_QgsDataDefined}
--------------
- expressionParams(), setExpressionParams() and insertExpressionParam() have been removed.
QgsExpressionContext variables should be used in their place.
- prepareExpression( QgsVectorLayer* layer ) and prepareExpression( const QgsFields &fields )
were removed. Use QgsExpressionContext variant instead.
- referencedColumns( QgsVectorLayer* layer ) and referencedColumns( const QgsFields& fields )
were removed. Use QgsExpressionContext variant instead.
QgsDataDefinedValueDialog {#qgis_api_break_3_0_QgsDataDefinedValueDialog}
--------------------------
- These classes and subclasses now use QgsProperty objects instead of QgsDataDefined.
QgsDataItem {#qgis_api_break_3_0_QgsDataItem}
-----------
- supportedCRS() has been renamed to supportedCrs()
- isPopulated() has been removed. Use state() instead.
- capabilities() has been removed. Use capabilities2() instead (TODO: rename back to capabilities()).
- emitBeginInsertItems(), emitEndInsertItems(), emitBeginRemoveItems(), emitEndRemoveItems(), emitDataChanged(), emitStateChanged() have been removed.
- Favourites was renamed to Favorites
QgsDataItemProviderRegistry {#qgis_api_break_3_0_QgsDataItemProviderRegistry}
---------------------------
- This class is no longer a singleton and instance() has been removed. Instead use QgsApplication::dataItemProviderRegistry() to access an application-wide registry.
QgsDataProvider {#qgis_api_break_3_0_QgsDataProvider}
---------------
- The duplicate (and unused) dataChanged( int ) signal was removed. Use dataChanged() instead.
QgsDataSourceURI {#qgis_api_break_3_0_QgsDatasourceUri}
----------------
- QgsDataSourceURI has been renamed to QgsDataSourceUri
- QgsDataSourceURI::SSLmode has been renamed to QgsDataSourceUri::SslMode. All items of this enum have been properly CamelCased.
QgsDatumTransformStore {#qgis_api_break_3_0_QgsDatumTransformStore}
----------------------
- transformation() now returns a QgsCoordinateTransform object, not a pointer. An invalid QgsCoordinateTransform will
be returned in place of a null pointer.
QgsDiagram {#qgis_api_break_3_0_QgsDiagram}
----------
- The deprecated getExpression( const QString& expression, const QgsFields* fields ) method has been removed.
Use the variant which accepts an expression context instead.
- The deprecated renderDiagram( const QgsAttributes& att, QgsRenderContext& c, const QgsDiagramSettings& s, QPointF position ) method has been removed.
Use renderDiagram( const QgsFeature& feature, QgsRenderContext& c, const QgsDiagramSettings& s, const QPointF& position ) instead.
- The deprecated diagramSize( const QgsAttributes& attributes, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is ) method has been removed.
Use diagramSize( const QgsFeature& feature, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is ) instead.
QgsDiagramInterpolationSettings {#qgis_api_break_3_0_QgsDiagramInterpolationSettings}
-------------------------------
- The classificationAttribute member variable was removed, and has been replaced by the classificationField variable which stores the string name.
QgsDiagramRenderer {#qgis_api_break_3_0_QgsDiagramRenderer}
------------------
- xform, fields were no longer required and are removed.
- referencedFields() no longer takes a QgsFields argument.
- renderDiagram() now takes an optional data defined overrides collection argument.
- readXml(), _readXml(), writeXml(), _writeXml() do not take QgsVectorLayer as an argument anymore.
- readXml(), _readXml(), writeXml(), _writeXml() require a new argument: a reference to QgsReadWriteContext
QgsDiagramLayerSettings {#qgis_api_break_3_0_QgsDiagramLayerSettings}
-----------------------
- coordinateTransform() now returns a QgsCoordinateTransform object, not a pointer. An invalid QgsCoordinateTransform will
be returned in place of a null pointer.
- setCoordinateTransform() now takes a QgsCoordinateTransform object, not a pointer. Use an invalid QgsCoordinateTransform in
place of a null pointer.
- The ct member has been removed. Use coordinateTransform() and setCoordinateTransform() instead.
- The LinePlacementFlags enum was renamed to LinePlacementFlag
- The placement member variable was removed, and getPlacement() was renamed to placement()
- The placementFlags member variable was removed
- The priority member variable was removed, and getPriority() was renamed to priority()
- The zIndex member variable was removed, and getZIndex() was renamed to zIndex()
- The obstacle member variable was removed. setIsObstacle() and isObstacle() should be used instead.
- The dist member variable was removed. setDistance() and distance() should be used instead.
- The renderer member variable was removed, and getRenderer() was renamed to renderer()
- The showAll member variable was removed. setShowAllDiagrams() and showAllDiagrams() should be used instead.
- The xPosColumn, yPosColumn and showColumn attributes were removed. Use setDataDefinedProperties() for
setting data defined properties instead.
- The LinePlacementFlags enum was renamed to LinePlacementFlag
- The placement member variable was removed, and getPlacement() was renamed to placement()
- The placementFlags member variable was removed
- The priority member variable was removed, and getPriority() was renamed to priority()
- The zIndex member variable was removed, and getZIndex() was renamed to zIndex()
- The obstacle member variable was removed. setIsObstacle() and isObstacle() should be used instead.
- The dist member variable was removed. setDistance() and distance() should be used instead.
- The renderer member variable was removed, and getRenderer() was renamed to renderer()
- The showAll member variable was removed. setShowAllDiagrams() and showAllDiagrams() should be used instead.
- referencedFields() no longer requires a QgsFields argument.
- readXml() and writeXml() do not take QgsVectorLayer as an argument anymore.
QgsDiagramSettings {#qgis_api_break_3_0_QgsDiagramSettings}
------------------
- The SizeType enum was removed. Use QgsUnitTypes.RenderUnit instead.
- readXml() and writeXml() do not take QgsVectorLayer as an argument anymore.
QgsDial {#qgis_api_break_3_0_QgsDial}
-------
- The protected valueChanged slot was removed.
QgsDistanceArea {#qgis_api_break_3_0_QgsDistanceArea}