QGIS API Documentation  3.13.0-Master (7f54853aae)
Public Member Functions | Static Public Member Functions | Protected Member Functions | List of all members
QgsHashedLineSymbolLayer Class Reference

Line symbol layer type which draws repeating line sections along a line feature. More...

#include <qgslinesymbollayer.h>

Inheritance diagram for QgsHashedLineSymbolLayer:
Inheritance graph
[legend]

Public Member Functions

 QgsHashedLineSymbolLayer (bool rotateSymbol=true, double interval=3)
 Constructor for QgsHashedLineSymbolLayer. More...
 
QgsHashedLineSymbolLayerclone () const override
 Shall be reimplemented by subclasses to create a deep copy of the instance. More...
 
QColor color () const override
 The fill color. More...
 
double estimateMaxBleed (const QgsRenderContext &context) const override
 Returns the estimated maximum distance which the layer style will bleed outside the drawn shape when drawn in the specified /a context. More...
 
bool hasDataDefinedProperties () const override
 Returns true if the symbol layer (or any of its sub-symbols) contains data defined properties. More...
 
double hashAngle () const
 Returns the angle to use when drawing the hashed lines sections, in degrees clockwise. More...
 
double hashLength () const
 Returns the length of hash symbols. More...
 
const QgsMapUnitScalehashLengthMapUnitScale () const
 Returns the map unit scale for the hash length. More...
 
QgsUnitTypes::RenderUnit hashLengthUnit () const
 Returns the units for the length of hash symbols. More...
 
QString layerType () const override
 Returns a string that represents this layer type. More...
 
QgsStringMap properties () const override
 Should be reimplemented by subclasses to return a string map that contains the configuration information for the symbol layer. More...
 
void setColor (const QColor &color) override
 The fill color. More...
 
void setDataDefinedProperty (QgsSymbolLayer::Property key, const QgsProperty &property) override
 Sets a data defined property for the layer. More...
 
void setHashAngle (double angle)
 Sets the angle to use when drawing the hashed lines sections, in degrees clockwise. More...
 
void setHashLength (double length)
 Sets the length of hash symbols. More...
 
void setHashLengthMapUnitScale (const QgsMapUnitScale &scale)
 Sets the map unit scale for the hash length. More...
 
void setHashLengthUnit (QgsUnitTypes::RenderUnit unit)
 Sets the unit for the length of hash symbols. More...
 
void setOutputUnit (QgsUnitTypes::RenderUnit unit) override
 Sets the units to use for sizes and widths within the symbol layer. More...
 
bool setSubSymbol (QgsSymbol *symbol) override
 Sets layer's subsymbol. takes ownership of the passed symbol. More...
 
void setWidth (double width) override
 Sets the width of the line symbol layer. More...
 
void startRender (QgsSymbolRenderContext &context) override
 Called before a set of rendering operations commences on the supplied render context. More...
 
void stopRender (QgsSymbolRenderContext &context) override
 Called after a set of rendering operations has finished on the supplied render context. More...
 
QgsSymbolsubSymbol () override
 Returns the symbol's sub symbol, if present. More...
 
QSet< QString > usedAttributes (const QgsRenderContext &context) const override
 Returns the set of attributes referenced by the layer. More...
 
double width () const override
 Returns the estimated width for the line symbol layer. More...
 
double width (const QgsRenderContext &context) const override
 Returns the line symbol layer width, in painter units. More...
 
- Public Member Functions inherited from QgsTemplatedLineSymbolLayerBase
 QgsTemplatedLineSymbolLayerBase (bool rotateSymbol=true, double interval=3)
 Constructor for QgsTemplatedLineSymbolLayerBase. More...
 
double averageAngleLength () const
 Returns the length of line over which the line's direction is averaged when calculating individual symbol angles. More...
 
const QgsMapUnitScaleaverageAngleMapUnitScale () const
 Returns the map unit scale for the length over which the line's direction is averaged when calculating individual symbol angles. More...
 
QgsUnitTypes::RenderUnit averageAngleUnit () const
 Returns the unit for the length over which the line's direction is averaged when calculating individual symbol angles. More...
 
double interval () const
 Returns the interval between individual symbols. More...
 
const QgsMapUnitScaleintervalMapUnitScale () const
 Returns the map unit scale for the interval between symbols. More...
 
QgsUnitTypes::RenderUnit intervalUnit () const
 Returns the units for the interval between symbols. More...
 
QgsMapUnitScale mapUnitScale () const FINAL
 
double offsetAlongLine () const
 Returns the offset along the line for the symbol placement. More...
 
const QgsMapUnitScaleoffsetAlongLineMapUnitScale () const
 Returns the map unit scale used for calculating the offset in map units along line for symbols. More...
 
QgsUnitTypes::RenderUnit offsetAlongLineUnit () const
 Returns the unit used for calculating the offset along line for symbols. More...
 
QgsUnitTypes::RenderUnit outputUnit () const FINAL
 Returns the units to use for sizes and widths within the symbol layer. More...
 
Placement placement () const
 Returns the placement of the symbols. More...
 
void renderPolygonStroke (const QPolygonF &points, QList< QPolygonF > *rings, QgsSymbolRenderContext &context) FINAL
 Renders the line symbol layer along the outline of polygon, using the given render context. More...
 
void renderPolyline (const QPolygonF &points, QgsSymbolRenderContext &context) FINAL
 Renders the line symbol layer along the line joining points, using the given render context. More...
 
bool rotateSymbols () const
 Returns true if the repeating symbols be rotated to match their line segment orientation. More...
 
void setAverageAngleLength (double length)
 Sets the length of line over which the line's direction is averaged when calculating individual symbol angles. More...
 
void setAverageAngleMapUnitScale (const QgsMapUnitScale &scale)
 Sets the map unit scale for the length over which the line's direction is averaged when calculating individual symbol angles. More...
 
void setAverageAngleUnit (QgsUnitTypes::RenderUnit unit)
 Sets the unit for the length over which the line's direction is averaged when calculating individual symbol angles. More...
 
void setInterval (double interval)
 Sets the interval between individual symbols. More...
 
void setIntervalMapUnitScale (const QgsMapUnitScale &scale)
 Sets the map unit scale for the interval between symbols. More...
 
void setIntervalUnit (QgsUnitTypes::RenderUnit unit)
 Sets the units for the interval between symbols. More...
 
void setMapUnitScale (const QgsMapUnitScale &scale) FINAL
 
void setOffsetAlongLine (double offsetAlongLine)
 Sets the the offset along the line for the symbol placement. More...
 
void setOffsetAlongLineMapUnitScale (const QgsMapUnitScale &scale)
 Sets the map unit scale used for calculating the offset in map units along line for symbols. More...
 
void setOffsetAlongLineUnit (QgsUnitTypes::RenderUnit unit)
 Sets the unit used for calculating the offset along line for symbols. More...
 
void setPlacement (Placement placement)
 Sets the placement of the symbols. More...
 
void setRotateSymbols (bool rotate)
 Sets whether the repeating symbols should be rotated to match their line segment orientation. More...
 
- Public Member Functions inherited from QgsLineSymbolLayer
 QgsLineSymbolLayer (const QgsLineSymbolLayer &other)=delete
 QgsLineSymbolLayer cannot be copied. More...
 
void drawPreviewIcon (QgsSymbolRenderContext &context, QSize size) override
 
double dxfWidth (const QgsDxfExport &e, QgsSymbolRenderContext &context) const override
 Gets line width. More...
 
QgsMapUnitScale mapUnitScale () const override
 
double offset () const
 Returns the line's offset. More...
 
const QgsMapUnitScaleoffsetMapUnitScale () const
 Returns the map unit scale for the line's offset. More...
 
QgsUnitTypes::RenderUnit offsetUnit () const
 Returns the units for the line's offset. More...
 
QgsLineSymbolLayeroperator= (const QgsLineSymbolLayer &other)=delete
 QgsLineSymbolLayer cannot be copied. More...
 
QgsUnitTypes::RenderUnit outputUnit () const override
 Returns the units to use for sizes and widths within the symbol layer. More...
 
RenderRingFilter ringFilter () const
 Returns the line symbol layer's ring filter, which controls which rings are rendered when the line symbol is being used to draw a polygon's rings. More...
 
void setMapUnitScale (const QgsMapUnitScale &scale) override
 
void setOffset (double offset)
 Sets the line's offset. More...
 
void setOffsetMapUnitScale (const QgsMapUnitScale &scale)
 Sets the map unit scale for the line's offset. More...
 
void setOffsetUnit (QgsUnitTypes::RenderUnit unit)
 Sets the unit for the line's offset. More...
 
void setOutputUnit (QgsUnitTypes::RenderUnit unit) override
 Sets the units to use for sizes and widths within the symbol layer. More...
 
void setRingFilter (QgsLineSymbolLayer::RenderRingFilter filter)
 Sets the line symbol layer's ring filter, which controls which rings are rendered when the line symbol is being used to draw a polygon's rings. More...
 
void setWidthMapUnitScale (const QgsMapUnitScale &scale)
 
void setWidthUnit (QgsUnitTypes::RenderUnit unit)
 Sets the units for the line's width. More...
 
const QgsMapUnitScalewidthMapUnitScale () const
 
QgsUnitTypes::RenderUnit widthUnit () const
 Returns the units for the line's width. More...
 
- Public Member Functions inherited from QgsSymbolLayer
 QgsSymbolLayer (const QgsSymbolLayer &other)=delete
 QgsSymbolLayer cannot be copied. More...
 
virtual ~QgsSymbolLayer ()
 
QgsPropertyCollectiondataDefinedProperties ()
 Returns a reference to the symbol layer's property collection, used for data defined overrides. More...
 
const QgsPropertyCollectiondataDefinedProperties () const
 Returns a reference to the symbol layer's property collection, used for data defined overrides. More...
 
virtual double dxfAngle (QgsSymbolRenderContext &context) const
 Gets angle. More...
 
virtual QColor dxfBrushColor (QgsSymbolRenderContext &context) const
 Gets brush/fill color. More...
 
virtual Qt::BrushStyle dxfBrushStyle () const
 Gets brush/fill style. More...
 
virtual QColor dxfColor (QgsSymbolRenderContext &context) const
 Gets color. More...
 
virtual QVector< qreal > dxfCustomDashPattern (QgsUnitTypes::RenderUnit &unit) const
 Gets dash pattern. More...
 
virtual double dxfOffset (const QgsDxfExport &e, QgsSymbolRenderContext &context) const
 Gets offset. More...
 
virtual Qt::PenStyle dxfPenStyle () const
 Gets pen style. More...
 
bool enabled () const
 Returns true if symbol layer is enabled and will be drawn. More...
 
virtual QColor fillColor () const
 Gets fill color. More...
 
virtual bool isCompatibleWithSymbol (QgsSymbol *symbol) const
 Returns if the layer can be used below the specified symbol. More...
 
bool isLocked () const
 
virtual QgsSymbolLayerReferenceList masks () const
 Returns masks defined by this symbol layer. More...
 
virtual QString ogrFeatureStyle (double mmScaleFactor, double mapUnitScaleFactor) const
 
QgsSymbolLayeroperator= (const QgsSymbolLayer &other)=delete
 QgsSymbolLayer cannot be copied. More...
 
QgsPaintEffectpaintEffect () const
 Returns the current paint effect for the layer. More...
 
virtual void prepareExpressions (const QgsSymbolRenderContext &context)
 Prepares all data defined property expressions for evaluation. More...
 
int renderingPass () const
 Specifies the rendering pass in which this symbol layer should be rendered. More...
 
void setDataDefinedProperties (const QgsPropertyCollection &collection)
 Sets the symbol layer's property collection, used for data defined overrides. More...
 
void setEnabled (bool enabled)
 Sets whether symbol layer is enabled and should be drawn. More...
 
virtual void setFillColor (const QColor &color)
 Set fill color. More...
 
void setLocked (bool locked)
 
void setPaintEffect (QgsPaintEffect *effect)
 Sets the current paint effect for the layer. More...
 
void setRenderingPass (int renderingPass)
 Specifies the rendering pass in which this symbol layer should be rendered. More...
 
virtual void setStrokeColor (const QColor &color)
 Set stroke color. More...
 
virtual void startFeatureRender (const QgsFeature &feature, QgsRenderContext &context)
 Called before the layer will be rendered for a particular feature. More...
 
virtual void stopFeatureRender (const QgsFeature &feature, QgsRenderContext &context)
 Called after the layer has been rendered for a particular feature. More...
 
virtual QColor strokeColor () const
 Gets stroke color. More...
 
virtual void toSld (QDomDocument &doc, QDomElement &element, const QgsStringMap &props) const
 
QgsSymbol::SymbolType type () const
 
virtual bool writeDxf (QgsDxfExport &e, double mmMapUnitScaleFactor, const QString &layerName, QgsSymbolRenderContext &context, QPointF shift=QPointF(0.0, 0.0)) const
 write as DXF More...
 

Static Public Member Functions

static QgsSymbolLayercreate (const QgsStringMap &properties=QgsStringMap())
 Creates a new QgsHashedLineSymbolLayer, using the settings serialized in the properties map (corresponding to the output from QgsHashedLineSymbolLayer::properties() ). More...
 
- Static Public Member Functions inherited from QgsSymbolLayer
static const QgsPropertiesDefinitionpropertyDefinitions ()
 Returns the symbol layer property definitions. More...
 

Protected Member Functions

void renderSymbol (const QPointF &point, const QgsFeature *feature, QgsRenderContext &context, int layer=-1, bool selected=false) override
 Renders the templated symbol at the specified point, using the given render context. More...
 
void setSymbolAngle (double angle) override
 Sets the symbol's angle, in degrees clockwise. More...
 
void setSymbolLineAngle (double angle) override
 Sets the line angle modification for the symbol's angle. More...
 
double symbolAngle () const override
 Returns the symbol's current angle, in degrees clockwise. More...
 
- Protected Member Functions inherited from QgsTemplatedLineSymbolLayerBase
void copyTemplateSymbolProperties (QgsTemplatedLineSymbolLayerBase *destLayer) const
 Copies all common properties of this layer to another templated symbol layer. More...
 
- Protected Member Functions inherited from QgsLineSymbolLayer
 QgsLineSymbolLayer (bool locked=false)
 
- Protected Member Functions inherited from QgsSymbolLayer
 QgsSymbolLayer (QgsSymbol::SymbolType type, bool locked=false)
 
void copyDataDefinedProperties (QgsSymbolLayer *destLayer) const
 Copies all data defined properties of this layer to another symbol layer. More...
 
void copyPaintEffect (QgsSymbolLayer *destLayer) const
 Copies paint effect of this layer to another symbol layer. More...
 
void restoreOldDataDefinedProperties (const QgsStringMap &stringMap)
 Restores older data defined properties from string map. More...
 

Additional Inherited Members

- Public Types inherited from QgsTemplatedLineSymbolLayerBase
enum  Placement {
  Interval, Vertex, LastVertex, FirstVertex,
  CentralPoint, CurvePoint, SegmentCenter
}
 Defines how/where the templated symbol should be placed on the line. More...
 
- Public Types inherited from QgsLineSymbolLayer
enum  RenderRingFilter { AllRings, ExteriorRingOnly, InteriorRingsOnly }
 Options for filtering rings when the line symbol layer is being used to render a polygon's rings. More...
 
- Public Types inherited from QgsSymbolLayer
enum  Property {
  PropertySize = 0, PropertyAngle, PropertyName, PropertyFillColor,
  PropertyStrokeColor, PropertyStrokeWidth, PropertyStrokeStyle, PropertyOffset,
  PropertyCharacter, PropertyWidth, PropertyHeight, PropertyPreserveAspectRatio,
  PropertyFillStyle, PropertyJoinStyle, PropertySecondaryColor, PropertyLineAngle,
  PropertyLineDistance, PropertyGradientType, PropertyCoordinateMode, PropertyGradientSpread,
  PropertyGradientReference1X, PropertyGradientReference1Y, PropertyGradientReference2X, PropertyGradientReference2Y,
  PropertyGradientReference1IsCentroid, PropertyGradientReference2IsCentroid, PropertyBlurRadius, PropertyShapeburstUseWholeShape,
  PropertyShapeburstMaxDistance, PropertyShapeburstIgnoreRings, PropertyFile, PropertyDistanceX,
  PropertyDistanceY, PropertyDisplacementX, PropertyDisplacementY, PropertyOpacity,
  PropertyCustomDash, PropertyCapStyle, PropertyPlacement, PropertyInterval,
  PropertyOffsetAlongLine, PropertyAverageAngleLength, PropertyHorizontalAnchor, PropertyVerticalAnchor,
  PropertyLayerEnabled, PropertyArrowWidth, PropertyArrowStartWidth, PropertyArrowHeadLength,
  PropertyArrowHeadThickness, PropertyArrowHeadType, PropertyArrowType, PropertyOffsetX,
  PropertyOffsetY, PropertyPointCount, PropertyRandomSeed, PropertyClipPoints,
  PropertyDensityArea
}
 Data definable properties. More...
 
- Static Protected Member Functions inherited from QgsTemplatedLineSymbolLayerBase
static void setCommonProperties (QgsTemplatedLineSymbolLayerBase *destLayer, const QgsStringMap &properties)
 Sets all common symbol properties in the destLayer, using the settings serialized in the properties map. More...
 
- Protected Attributes inherited from QgsLineSymbolLayer
double mOffset = 0
 
QgsMapUnitScale mOffsetMapUnitScale
 
QgsUnitTypes::RenderUnit mOffsetUnit = QgsUnitTypes::RenderMillimeters
 
RenderRingFilter mRingFilter = AllRings
 
double mWidth = 0
 
QgsMapUnitScale mWidthMapUnitScale
 
QgsUnitTypes::RenderUnit mWidthUnit = QgsUnitTypes::RenderMillimeters
 
- Protected Attributes inherited from QgsSymbolLayer
QColor mColor
 
QgsPropertyCollection mDataDefinedProperties
 
bool mEnabled = true
 True if layer is enabled and should be drawn. More...
 
QgsFields mFields
 
bool mLocked = false
 
std::unique_ptr< QgsPaintEffectmPaintEffect
 
int mRenderingPass = 0
 
QgsSymbol::SymbolType mType
 
- Static Protected Attributes inherited from QgsSymbolLayer
static const bool SELECT_FILL_BORDER = false
 Whether fill styles for selected features also highlight symbol stroke. More...
 
static const bool SELECT_FILL_STYLE = false
 Whether fill styles for selected features uses symbol layer style. More...
 
static const bool SELECTION_IS_OPAQUE = true
 Whether styles for selected features ignore symbol alpha. More...
 

Detailed Description

Line symbol layer type which draws repeating line sections along a line feature.

Since
QGIS 3.8

Definition at line 656 of file qgslinesymbollayer.h.

Constructor & Destructor Documentation

◆ QgsHashedLineSymbolLayer()

QgsHashedLineSymbolLayer::QgsHashedLineSymbolLayer ( bool  rotateSymbol = true,
double  interval = 3 
)

Constructor for QgsHashedLineSymbolLayer.

Creates a line with a default hash symbol, placed at the specified interval (in millimeters).

The rotateSymbol argument specifies whether individual hash symbols should be rotated to match the line segment alignment.

Definition at line 2043 of file qgslinesymbollayer.cpp.

Member Function Documentation

◆ clone()

QgsHashedLineSymbolLayer * QgsHashedLineSymbolLayer::clone ( ) const
overridevirtual

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

Implements QgsSymbolLayer.

Definition at line 2113 of file qgslinesymbollayer.cpp.

◆ color()

QColor QgsHashedLineSymbolLayer::color ( ) const
overridevirtual

The fill color.

Reimplemented from QgsSymbolLayer.

Definition at line 2130 of file qgslinesymbollayer.cpp.

◆ create()

QgsSymbolLayer * QgsHashedLineSymbolLayer::create ( const QgsStringMap properties = QgsStringMap())
static

Creates a new QgsHashedLineSymbolLayer, using the settings serialized in the properties map (corresponding to the output from QgsHashedLineSymbolLayer::properties() ).

Definition at line 2049 of file qgslinesymbollayer.cpp.

◆ estimateMaxBleed()

double QgsHashedLineSymbolLayer::estimateMaxBleed ( const QgsRenderContext context) const
overridevirtual

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.

Reimplemented from QgsSymbolLayer.

Definition at line 2168 of file qgslinesymbollayer.cpp.

◆ hasDataDefinedProperties()

bool QgsHashedLineSymbolLayer::hasDataDefinedProperties ( ) const
overridevirtual

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

Since
QGIS 3.4.5

Reimplemented from QgsSymbolLayer.

Definition at line 2192 of file qgslinesymbollayer.cpp.

◆ hashAngle()

double QgsHashedLineSymbolLayer::hashAngle ( ) const

Returns the angle to use when drawing the hashed lines sections, in degrees clockwise.

See also
setHashAngle()

Definition at line 2252 of file qgslinesymbollayer.cpp.

◆ hashLength()

double QgsHashedLineSymbolLayer::hashLength ( ) const
inline

Returns the length of hash symbols.

Units are specified through hashLengthUnits().

See also
setHashLength()
hashLengthUnit()

Definition at line 714 of file qgslinesymbollayer.h.

◆ hashLengthMapUnitScale()

const QgsMapUnitScale& QgsHashedLineSymbolLayer::hashLengthMapUnitScale ( ) const
inline

Returns the map unit scale for the hash length.

See also
setHashLengthMapUnitScale()
hashLengthUnit()
hashLength()

Definition at line 751 of file qgslinesymbollayer.h.

◆ hashLengthUnit()

QgsUnitTypes::RenderUnit QgsHashedLineSymbolLayer::hashLengthUnit ( ) const
inline

Returns the units for the length of hash symbols.

See also
setHashLengthUnit()
hashLength()

Definition at line 735 of file qgslinesymbollayer.h.

◆ layerType()

QString QgsHashedLineSymbolLayer::layerType ( ) const
overridevirtual

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.

Implements QgsSymbolLayer.

Definition at line 2078 of file qgslinesymbollayer.cpp.

◆ properties()

QgsStringMap QgsHashedLineSymbolLayer::properties ( ) const
overridevirtual

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.

Reimplemented from QgsTemplatedLineSymbolLayerBase.

Definition at line 2101 of file qgslinesymbollayer.cpp.

◆ renderSymbol()

void QgsHashedLineSymbolLayer::renderSymbol ( const QPointF &  point,
const QgsFeature feature,
QgsRenderContext context,
int  layer = -1,
bool  selected = false 
)
overrideprotectedvirtual

Renders the templated symbol at the specified point, using the given render context.

The feature argument is used to pass the feature currently being rendered (when available).

If only a single symbol layer from the symbol should be rendered, it should be specified in the layer argument. A layer of -1 indicates that all symbol layers should be rendered.

If selected is true then the symbol will be drawn using the "selected feature" style and colors instead of the symbol's normal style.

Implements QgsTemplatedLineSymbolLayerBase.

Definition at line 2225 of file qgslinesymbollayer.cpp.

◆ setColor()

void QgsHashedLineSymbolLayer::setColor ( const QColor &  color)
overridevirtual

The fill color.

Reimplemented from QgsSymbolLayer.

Definition at line 2124 of file qgslinesymbollayer.cpp.

◆ setDataDefinedProperty()

void QgsHashedLineSymbolLayer::setDataDefinedProperty ( QgsSymbolLayer::Property  key,
const QgsProperty property 
)
overridevirtual

Sets a data defined property for the layer.

Any existing property with the same key will be overwritten.

See also
dataDefinedProperties()
Property
Since
QGIS 3.0

Reimplemented from QgsSymbolLayer.

Definition at line 2201 of file qgslinesymbollayer.cpp.

◆ setHashAngle()

void QgsHashedLineSymbolLayer::setHashAngle ( double  angle)

Sets the angle to use when drawing the hashed lines sections, in degrees clockwise.

See also
hashAngle()

Definition at line 2257 of file qgslinesymbollayer.cpp.

◆ setHashLength()

void QgsHashedLineSymbolLayer::setHashLength ( double  length)
inline

Sets the length of hash symbols.

Units are specified through setHashLengthUnit()

See also
hashLength()
setHashLengthUnit()

Definition at line 721 of file qgslinesymbollayer.h.

◆ setHashLengthMapUnitScale()

void QgsHashedLineSymbolLayer::setHashLengthMapUnitScale ( const QgsMapUnitScale scale)
inline

Sets the map unit scale for the hash length.

See also
hashLengthMapUnitScale()
setHashLengthUnit()
setHashLength()

Definition at line 743 of file qgslinesymbollayer.h.

◆ setHashLengthUnit()

void QgsHashedLineSymbolLayer::setHashLengthUnit ( QgsUnitTypes::RenderUnit  unit)
inline

Sets the unit for the length of hash symbols.

See also
hashLengthUnit()
setHashLength()

Definition at line 728 of file qgslinesymbollayer.h.

◆ setOutputUnit()

void QgsHashedLineSymbolLayer::setOutputUnit ( QgsUnitTypes::RenderUnit  unit)
overridevirtual

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
unitoutput units
See also
outputUnit()

Reimplemented from QgsSymbolLayer.

Definition at line 2175 of file qgslinesymbollayer.cpp.

◆ setSubSymbol()

bool QgsHashedLineSymbolLayer::setSubSymbol ( QgsSymbol symbol)
overridevirtual

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

Reimplemented from QgsSymbolLayer.

Definition at line 2140 of file qgslinesymbollayer.cpp.

◆ setSymbolAngle()

void QgsHashedLineSymbolLayer::setSymbolAngle ( double  angle)
overrideprotectedvirtual

Sets the symbol's angle, in degrees clockwise.

Implements QgsTemplatedLineSymbolLayerBase.

Definition at line 2220 of file qgslinesymbollayer.cpp.

◆ setSymbolLineAngle()

void QgsHashedLineSymbolLayer::setSymbolLineAngle ( double  angle)
overrideprotectedvirtual

Sets the line angle modification for the symbol's angle.

This angle is added to the symbol's rotation and data defined rotation before rendering the symbol, and is used for orienting symbols to match the line's angle.

Parameters
angleAngle in degrees, valid values are between 0 and 360

Implements QgsTemplatedLineSymbolLayerBase.

Definition at line 2210 of file qgslinesymbollayer.cpp.

◆ setWidth()

void QgsHashedLineSymbolLayer::setWidth ( double  width)
overridevirtual

Sets the width of the line symbol layer.

Calling this method updates the width of the line symbol layer, without changing the existing width units. It has different effects depending on the line symbol layer subclass, e.g. for a simple line layer it changes the stroke width of the line, for a marker line layer it changes the size of the markers used to draw the line.

See also
width()
Warning
Since the width units vary, this method is useful for changing the relative width of a line symbol layer only.

Reimplemented from QgsLineSymbolLayer.

Definition at line 2153 of file qgslinesymbollayer.cpp.

◆ startRender()

void QgsHashedLineSymbolLayer::startRender ( QgsSymbolRenderContext context)
overridevirtual

Called before a set of rendering operations commences on the supplied render context.

This is always followed by a call to stopRender() after all rendering operations have been completed.

Subclasses can use this method to prepare for a set of rendering operations, e.g. by pre-evaluating paths or images to render, and performing other one-time optimisations.

See also
startFeatureRender()
stopRender()

Implements QgsSymbolLayer.

Definition at line 2083 of file qgslinesymbollayer.cpp.

◆ stopRender()

void QgsHashedLineSymbolLayer::stopRender ( QgsSymbolRenderContext context)
overridevirtual

Called after a set of rendering operations has finished on the supplied render context.

This is always preceded by a call to startRender() before all rendering operations are commenced.

Subclasses can use this method to cleanup after a set of rendering operations.

See also
startRender()
stopFeatureRender()

Implements QgsSymbolLayer.

Definition at line 2096 of file qgslinesymbollayer.cpp.

◆ subSymbol()

QgsSymbol * QgsHashedLineSymbolLayer::subSymbol ( )
overridevirtual

Returns the symbol's sub symbol, if present.

Reimplemented from QgsSymbolLayer.

Definition at line 2135 of file qgslinesymbollayer.cpp.

◆ symbolAngle()

double QgsHashedLineSymbolLayer::symbolAngle ( ) const
overrideprotectedvirtual

Returns the symbol's current angle, in degrees clockwise.

Implements QgsTemplatedLineSymbolLayerBase.

Definition at line 2215 of file qgslinesymbollayer.cpp.

◆ usedAttributes()

QSet< QString > QgsHashedLineSymbolLayer::usedAttributes ( const QgsRenderContext context) const
overridevirtual

Returns the set of attributes referenced by the layer.

This includes attributes required by any data defined properties associated with the layer.

Reimplemented from QgsSymbolLayer.

Definition at line 2184 of file qgslinesymbollayer.cpp.

◆ width() [1/2]

double QgsHashedLineSymbolLayer::width ( ) const
overridevirtual

Returns the estimated width for the line symbol layer.

Warning
This returned value is inaccurate if the symbol layer has sub-symbols with different width units. Use the overload accepting a QgsRenderContext argument instead for accurate sizes in this case.
See also
setWidth()

Reimplemented from QgsLineSymbolLayer.

Definition at line 2158 of file qgslinesymbollayer.cpp.

◆ width() [2/2]

double QgsHashedLineSymbolLayer::width ( const QgsRenderContext context) const
overridevirtual

Returns the line symbol layer width, in painter units.

This method returns an accurate width by calculating the actual rendered width of the symbol layer using the provided render context.

See also
setWidth()
Since
QGIS 3.4.5

Reimplemented from QgsLineSymbolLayer.

Definition at line 2163 of file qgslinesymbollayer.cpp.


The documentation for this class was generated from the following files: