Class: QgsFillSymbolLayer

Abstract base class for fill symbol layers.

Note

This is an abstract class, with methods which must be implemented by a subclass.

The following methods must be implemented: QgsSymbolLayer.clone(), QgsSymbolLayer.layerType(), QgsSymbolLayer.properties(), renderPolygon(), QgsSymbolLayer.startRender(), QgsSymbolLayer.stopRender()

Class Hierarchy

Base classes

QgsSymbolLayer

Abstract base class for symbol layers.

Subclasses

QgsCentroidFillSymbolLayer	A fill symbol layer which renders a marker symbol at the centroid of a polygon geometry.
QgsGradientFillSymbolLayer	A fill symbol layer which draws a smooth color gradient over a polygon.
QgsImageFillSymbolLayer	Base class for fill symbol layers which fill polygons with a repeated image.
QgsRandomMarkerFillSymbolLayer	A fill symbol layer which places markers at random locations within polygons.
QgsShapeburstFillSymbolLayer	A fill symbol layer which applies a gradient from the outer edges of a symbol to the inside.
QgsSimpleFillSymbolLayer	Renders polygons using a single fill and stroke color.

class qgis.core.QgsFillSymbolLayer

Bases: QgsSymbolLayer

angle(self) → float

Returns the rotation angle of the fill symbol, in degrees clockwise.

Note

Not all fill symbol layers support rotation.

See also

setAngle()

Return type:

float

abstract renderPolygon(self, points: QPolygonF, rings: Iterable[QPolygonF] | None, context: QgsSymbolRenderContext)

Renders the fill symbol layer for the polygon whose outer ring is defined by points, using the given render context.

The rings argument optionally specifies a list of polygon rings to render as holes.

Parameters:

• points (QPolygonF)

• rings (Optional[Iterable[QPolygonF]])

• context (QgsSymbolRenderContext)

setAngle(self, angle: float)

Sets the rotation angle of the pattern, in degrees clockwise.

Note

Not all fill symbol layers support rotation.

See also

angle()

Parameters:

angle (float)

virtual toTiledPatternImage(self) → QImage

Renders the symbol layer as an image that can be used as a seamless pattern fill for polygons, this method is used by SLD export to generate image tiles for ExternalGraphic polygon fills.

The default implementation returns a null image.

Return type:

QImage

Returns:

the tile image (not necessarily a square) or a null image if not implemented.

Added in version 3.30.