16#ifndef QGSGEOMETRYGENERATORSYMBOLLAYER_H
17#define QGSGEOMETRYGENERATORSYMBOLLAYER_H
62 QColor
color()
const override;
69 QVariantMap properties() const override;
76 void setGeometryExpression( const QString &exp );
81 QString geometryExpression() const;
133 void setColor(
const QColor &color )
override;
153 std::unique_ptr<QgsExpression> mExpression;
154 std::unique_ptr<QgsFillSymbol> mFillSymbol;
155 std::unique_ptr<QgsLineSymbol> mLineSymbol;
156 std::unique_ptr<QgsMarkerSymbol> mMarkerSymbol;
166 bool mRenderingFeature =
false;
167 bool mHasRenderedFeature =
false;
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
A fill symbol type, for rendering Polygon and MultiPolygon geometries.
Qgis::SymbolType symbolType() const
Access the symbol type.
QgsSymbol * subSymbol() override
Returns the symbol's sub symbol, if present.
void setUnits(QgsUnitTypes::RenderUnit units)
Sets the units for the geometry expression.
~QgsGeometryGeneratorSymbolLayer() override
A geometry is the spatial representation of a feature.
A line symbol type, for rendering LineString and MultiLineString geometries.
Struct for storing maximum and minimum scales for measurements in map units.
A marker symbol type, for rendering Point and MultiPoint geometries.
Contains information about the context of a rendering operation.
virtual void setOutputUnit(QgsUnitTypes::RenderUnit unit)
Sets the units to use for sizes and widths within the symbol layer.
virtual QgsSymbolLayer * clone() const =0
Shall be reimplemented by subclasses to create a deep copy of the instance.
virtual bool setSubSymbol(QgsSymbol *symbol)
Sets layer's subsymbol. takes ownership of the passed symbol.
virtual void startFeatureRender(const QgsFeature &feature, QgsRenderContext &context)
Called before the layer will be rendered for a particular feature.
virtual QgsMapUnitScale mapUnitScale() const
virtual QSet< QString > usedAttributes(const QgsRenderContext &context) const
Returns the set of attributes referenced by the layer.
virtual void startRender(QgsSymbolRenderContext &context)=0
Called before a set of rendering operations commences on the supplied render context.
virtual QString layerType() const =0
Returns a string that represents this layer type.
virtual void stopRender(QgsSymbolRenderContext &context)=0
Called after a set of rendering operations has finished on the supplied render context.
virtual QgsUnitTypes::RenderUnit outputUnit() const
Returns the units to use for sizes and widths within the symbol layer.
virtual bool isCompatibleWithSymbol(QgsSymbol *symbol) const
Returns if the layer can be used below the specified symbol.
virtual void setColor(const QColor &color)
Sets the "representative" color for the symbol layer.
virtual QColor color() const
Returns the "representative" color of the symbol layer.
virtual void stopFeatureRender(const QgsFeature &feature, QgsRenderContext &context)
Called after the layer has been rendered for a particular feature.
virtual bool usesMapUnits() const
Returns true if the symbol layer has any components which use map unit based sizes.
virtual bool hasDataDefinedProperties() const
Returns true if the symbol layer (or any of its sub-symbols) contains data defined properties.
Abstract base class for all rendered symbols.
Helper functions for various unit types.
RenderUnit
Rendering size units.
@ RenderMapUnits
Map units.
GeometryType
The geometry types are used to group QgsWkbTypes::Type in a coarse way.