Class: QgsSymbolLayer

class qgis.core.QgsSymbolLayer(type: QgsSymbol.SymbolType, locked: bool = False)

Bases: sip.wrapper

QgsSymbolLayer(QgsSymbolLayer)

Enums

Methods

clone

Shall be reimplemented by subclasses to create a deep copy of the instance.

color

The fill color.

copyDataDefinedProperties

Copies all data defined properties of this layer to another symbol layer.

copyPaintEffect

Copies paint effect of this layer to another symbol layer

dataDefinedProperties

Returns a reference to the symbol layer’s property collection, used for data defined overrides.

drawPreviewIcon

dxfAngle

Gets angle

dxfBrushColor

Gets brush/fill color

dxfBrushStyle

Gets brush/fill style

dxfColor

Gets color

dxfCustomDashPattern

Gets dash pattern

dxfOffset

Gets offset

dxfPenStyle

Gets pen style

dxfWidth

Gets line width

enabled

Returns True if symbol layer is enabled and will be drawn.

estimateMaxBleed

Returns the estimated maximum distance which the layer style will bleed outside the drawn shape when drawn in the specified /a context.

fillColor

Gets fill color.

hasDataDefinedProperties

Returns True if the symbol layer (or any of its sub-symbols) contains data defined properties.

isCompatibleWithSymbol

Returns if the layer can be used below the specified symbol

isLocked

layerType

Returns a string that represents this layer type.

mapUnitScale

ogrFeatureStyle

outputUnit

Returns the units to use for sizes and widths within the symbol layer.

paintEffect

Returns the current paint effect for the layer.

prepareExpressions

Prepares all data defined property expressions for evaluation.

properties

Should be reimplemented by subclasses to return a string map that contains the configuration information for the symbol layer.

propertyDefinitions

Returns the symbol layer property definitions.

renderingPass

Specifies the rendering pass in which this symbol layer should be rendered.

restoreOldDataDefinedProperties

Restores older data defined properties from string map.

setColor

The fill color.

setDataDefinedProperties

Sets the symbol layer’s property collection, used for data defined overrides.

setDataDefinedProperty

Sets a data defined property for the layer.

setEnabled

Sets whether symbol layer is enabled and should be drawn.

setFillColor

Set fill color.

setLocked

setMapUnitScale

setOutputUnit

Sets the units to use for sizes and widths within the symbol layer.

setPaintEffect

Sets the current paint effect for the layer.

setRenderingPass

Specifies the rendering pass in which this symbol layer should be rendered.

setStrokeColor

Set stroke color.

setSubSymbol

Sets layer’s subsymbol.

startRender

stopRender

strokeColor

Gets stroke color.

subSymbol

Returns the symbol’s sub symbol, if present.

toSld

type

usedAttributes

Returns the set of attributes referenced by the layer.

writeDxf

write as DXF

Signals

Attributes

PropertyAngle

PropertyArrowHeadLength

PropertyArrowHeadThickness

PropertyArrowHeadType

PropertyArrowStartWidth

PropertyArrowType

PropertyArrowWidth

PropertyAverageAngleLength

PropertyBlurRadius

PropertyCapStyle

PropertyCharacter

PropertyCoordinateMode

PropertyCustomDash

PropertyDisplacementX

PropertyDisplacementY

PropertyDistanceX

PropertyDistanceY

PropertyFile

PropertyFillColor

PropertyFillStyle

PropertyGradientReference1IsCentroid

PropertyGradientReference1X

PropertyGradientReference1Y

PropertyGradientReference2IsCentroid

PropertyGradientReference2X

PropertyGradientReference2Y

PropertyGradientSpread

PropertyGradientType

PropertyHeight

PropertyHorizontalAnchor

PropertyInterval

PropertyJoinStyle

PropertyLayerEnabled

PropertyLineAngle

PropertyLineDistance

PropertyName

PropertyOffset

PropertyOffsetAlongLine

PropertyOffsetX

PropertyOffsetY

PropertyOpacity

PropertyPlacement

PropertyPreserveAspectRatio

PropertySecondaryColor

PropertyShapeburstIgnoreRings

PropertyShapeburstMaxDistance

PropertyShapeburstUseWholeShape

PropertySize

PropertyStrokeColor

PropertyStrokeStyle

PropertyStrokeWidth

PropertyVerticalAnchor

PropertyWidth

class Property

Bases: int

PropertyAngle = 1
PropertyArrowHeadLength = 47
PropertyArrowHeadThickness = 48
PropertyArrowHeadType = 49
PropertyArrowStartWidth = 46
PropertyArrowType = 50
PropertyArrowWidth = 45
PropertyAverageAngleLength = 41
PropertyBlurRadius = 26
PropertyCapStyle = 37
PropertyCharacter = 8
PropertyCoordinateMode = 18
PropertyCustomDash = 36
PropertyDisplacementX = 33
PropertyDisplacementY = 34
PropertyDistanceX = 31
PropertyDistanceY = 32
PropertyFile = 30
PropertyFillColor = 3
PropertyFillStyle = 12
PropertyGradientReference1IsCentroid = 24
PropertyGradientReference1X = 20
PropertyGradientReference1Y = 21
PropertyGradientReference2IsCentroid = 25
PropertyGradientReference2X = 22
PropertyGradientReference2Y = 23
PropertyGradientSpread = 19
PropertyGradientType = 17
PropertyHeight = 10
PropertyHorizontalAnchor = 42
PropertyInterval = 39
PropertyJoinStyle = 13
PropertyLayerEnabled = 44
PropertyLineAngle = 15
PropertyLineDistance = 16
PropertyName = 2
PropertyOffset = 7
PropertyOffsetAlongLine = 40
PropertyOffsetX = 51
PropertyOffsetY = 52
PropertyOpacity = 35
PropertyPlacement = 38
PropertyPreserveAspectRatio = 11
PropertySecondaryColor = 14
PropertyShapeburstIgnoreRings = 29
PropertyShapeburstMaxDistance = 28
PropertyShapeburstUseWholeShape = 27
PropertySize = 0
PropertyStrokeColor = 4
PropertyStrokeStyle = 6
PropertyStrokeWidth = 5
PropertyVerticalAnchor = 43
PropertyWidth = 9
clone(self) → QgsSymbolLayer

Shall be reimplemented by subclasses to create a deep copy of the instance.

color(self) → QColor

The fill color.

copyDataDefinedProperties(self, destLayer: QgsSymbolLayer)

Copies all data defined properties of this layer to another symbol layer.

Parameters

destLayer – destination layer

copyPaintEffect(self, destLayer: QgsSymbolLayer)

Copies paint effect of this layer to another symbol layer

Parameters

destLayer – destination layer

New in version 2.9.

dataDefinedProperties(self) → QgsPropertyCollection

Returns a reference to the symbol layer’s property collection, used for data defined overrides.

See also

Property

New in version 3.0.

drawPreviewIcon(self, context: QgsSymbolRenderContext, size: QSize)
dxfAngle(self, context: QgsSymbolRenderContext) → float

Gets angle

dxfBrushColor(self, context: QgsSymbolRenderContext) → QColor

Gets brush/fill color

dxfBrushStyle(self) → Qt.BrushStyle

Gets brush/fill style

dxfColor(self, context: QgsSymbolRenderContext) → QColor

Gets color

dxfCustomDashPattern(self) → Tuple[List[float], QgsUnitTypes.RenderUnit]

Gets dash pattern

dxfOffset(self, e: QgsDxfExport, context: QgsSymbolRenderContext) → float

Gets offset

dxfPenStyle(self) → Qt.PenStyle

Gets pen style

dxfWidth(self, e: QgsDxfExport, context: QgsSymbolRenderContext) → float

Gets line width

enabled(self) → bool

Returns True if symbol layer is enabled and will be drawn.

See also

setEnabled()

New in version 3.0.

estimateMaxBleed(self, context: QgsRenderContext) → float

Returns the estimated maximum distance which the layer style will bleed outside the drawn shape when drawn in the specified /a context. For example, polygons drawn with an stroke will draw half the width of the stroke outside of the polygon. This amount is estimated, since it may be affected by data defined symbology rules.*

fillColor(self) → QColor

Gets fill color. Supported by marker and fill layers.

New in version 2.1.

hasDataDefinedProperties(self) → bool

Returns True if the symbol layer (or any of its sub-symbols) contains data defined properties.

New in version 3.4.5.

isCompatibleWithSymbol(self, symbol: QgsSymbol) → bool

Returns if the layer can be used below the specified symbol

isLocked(self) → bool
layerType(self) → str

Returns a string that represents this layer type. Used for serialization. Should match with the string used to register this symbol layer in the registry.

mapUnitScale(self) → QgsMapUnitScale
ogrFeatureStyle(self, mmScaleFactor: float, mapUnitScaleFactor: float) → str
outputUnit(self) → QgsUnitTypes.RenderUnit

Returns the units to use for sizes and widths within the symbol layer. Individual symbol layer subclasses will interpret this in different ways, e.g., a marker symbol layer may use it to specify the units for the marker size, while a line symbol layer may use it to specify the units for the line width.

Returns

output unit, or QgsUnitTypes.RenderUnknownUnit if the symbol layer contains mixed units

See also

setOutputUnit()

paintEffect(self) → QgsPaintEffect

Returns the current paint effect for the layer.

Returns

paint effect

See also

setPaintEffect()

New in version 2.9.

prepareExpressions(self, context: QgsSymbolRenderContext)

Prepares all data defined property expressions for evaluation. This should be called prior to evaluating data defined properties.

Parameters

context – symbol render context

New in version 2.12.

properties(self) → Dict[str, str]

Should be reimplemented by subclasses to return a string map that contains the configuration information for the symbol layer. This is used to serialize a symbol layer perstistently.

propertyDefinitions() → Dict[int, QgsPropertyDefinition]

Returns the symbol layer property definitions.

New in version 3.0.

renderingPass(self) → int

Specifies the rendering pass in which this symbol layer should be rendered. The lower the number, the lower the symbol will be rendered. 0: first pass, 1: second pass, … Defaults to 0

restoreOldDataDefinedProperties(self, stringMap: Dict[str, str])

Restores older data defined properties from string map.

New in version 3.0.

setColor(self, color: Union[QColor, Qt.GlobalColor])

The fill color.

setDataDefinedProperties(self, collection: QgsPropertyCollection)

Sets the symbol layer’s property collection, used for data defined overrides.

Parameters

collection – property collection. Existing properties will be replaced.

See also

properties()

New in version 3.0.

setDataDefinedProperty(self, key: QgsSymbolLayer.Property, property: QgsProperty)

Sets a data defined property for the layer. Any existing property with the same key will be overwritten.

See also

Property

New in version 3.0.

setEnabled(self, enabled: bool)

Sets whether symbol layer is enabled and should be drawn. Disabled layers are not drawn, but remain part of the symbol and can be re-enabled when desired.

See also

enabled()

New in version 3.0.

setFillColor(self, color: Union[QColor, Qt.GlobalColor])

Set fill color. Supported by marker and fill layers.

New in version 2.1.

setLocked(self, locked: bool)
setMapUnitScale(self, scale: QgsMapUnitScale)
setOutputUnit(self, unit: QgsUnitTypes.RenderUnit)

Sets the units to use for sizes and widths within the symbol layer. Individual symbol layer subclasses will interpret this in different ways, e.g., a marker symbol layer may use it to specify the units for the marker size, while a line symbol layer may use it to specify the units for the line width.

Parameters

unit – output units

See also

outputUnit()

setPaintEffect(self, effect: QgsPaintEffect)

Sets the current paint effect for the layer.

Parameters

effect – paint effect. Ownership is transferred to the layer.

See also

paintEffect()

New in version 2.9.

setRenderingPass(self, renderingPass: int)

Specifies the rendering pass in which this symbol layer should be rendered. The lower the number, the lower the symbol will be rendered. 0: first pass, 1: second pass, … Defaults to 0

setStrokeColor(self, color: Union[QColor, Qt.GlobalColor])

Set stroke color. Supported by marker and fill layers.

New in version 2.1.

setSubSymbol(self, symbol: QgsSymbol) → bool

Sets layer’s subsymbol. takes ownership of the passed symbol

startRender(self, context: QgsSymbolRenderContext)
stopRender(self, context: QgsSymbolRenderContext)
strokeColor(self) → QColor

Gets stroke color. Supported by marker and fill layers.

New in version 2.1.

subSymbol(self) → QgsSymbol

Returns the symbol’s sub symbol, if present.

toSld(self, doc: QDomDocument, element: QDomElement, props: Dict[str, str])
type(self) → QgsSymbol.SymbolType
usedAttributes(self, context: QgsRenderContext) → Set[str]

Returns the set of attributes referenced by the layer. This includes attributes required by any data defined properties associated with the layer.

writeDxf(self, e: QgsDxfExport, mmMapUnitScaleFactor: float, layerName: str, context: QgsSymbolRenderContext, shift: Union[QPointF, QPoint] = QPointF(0, 0)) → bool

write as DXF