QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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A simple line symbol layer, which renders lines using a line in a variety of styles (e.g. More...
#include <qgslinesymbollayer.h>
Public Member Functions | |
QgsSimpleLineSymbolLayer (const QColor &color=DEFAULT_SIMPLELINE_COLOR, double width=DEFAULT_SIMPLELINE_WIDTH, Qt::PenStyle penStyle=DEFAULT_SIMPLELINE_PENSTYLE) | |
Constructor for QgsSimpleLineSymbolLayer. | |
~QgsSimpleLineSymbolLayer () override | |
bool | alignDashPattern () const |
Returns true if dash patterns should be aligned to the start and end of lines, by applying subtle tweaks to the pattern sizing in order to ensure that the end of a line is represented by a complete dash element. | |
bool | canCauseArtifactsBetweenAdjacentTiles () const override |
Returns true if the symbol layer rendering can cause visible artifacts across a single feature when the feature is rendered as a series of adjacent map tiles each containing a portion of the feature's geometry. | |
QgsSimpleLineSymbolLayer * | clone () const override |
Shall be reimplemented by subclasses to create a deep copy of the instance. | |
const QgsMapUnitScale & | customDashPatternMapUnitScale () const |
Returns the map unit scale for lengths used in the custom dash pattern. | |
Qgis::RenderUnit | customDashPatternUnit () const |
Returns the units for lengths used in the custom dash pattern. | |
QVector< qreal > | customDashVector () const |
Returns the custom dash vector, which is the pattern of alternating drawn/skipped lengths used while rendering a custom dash pattern. | |
double | dashPatternOffset () const |
Returns the dash pattern offset, which dictates how far along the dash pattern the pattern should start rendering at. | |
const QgsMapUnitScale & | dashPatternOffsetMapUnitScale () const |
Returns the map unit scale for the dash pattern offset value. | |
Qgis::RenderUnit | dashPatternOffsetUnit () const |
Returns the units for the dash pattern offset. | |
bool | drawInsidePolygon () const |
Returns true if the line should only be drawn inside polygons, and any portion of the line which falls outside the polygon should be clipped away. | |
QColor | dxfColor (QgsSymbolRenderContext &context) const override |
Gets color. | |
QVector< qreal > | dxfCustomDashPattern (Qgis::RenderUnit &unit) const override |
Gets dash pattern. | |
double | dxfOffset (const QgsDxfExport &e, QgsSymbolRenderContext &context) const override |
Gets offset. | |
Qt::PenStyle | dxfPenStyle () const override |
Gets pen style. | |
double | dxfWidth (const QgsDxfExport &e, QgsSymbolRenderContext &context) const override |
Gets line width. | |
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. | |
Qgis::SymbolLayerFlags | flags () const override |
Returns flags which control the symbol layer's behavior. | |
QString | layerType () const override |
Returns a string that represents this layer type. | |
QgsMapUnitScale | mapUnitScale () const override |
QString | ogrFeatureStyle (double mmScaleFactor, double mapUnitScaleFactor) const override |
Qgis::RenderUnit | outputUnit () const override |
Returns the units to use for sizes and widths within the symbol layer. | |
Qt::PenCapStyle | penCapStyle () const |
Returns the pen cap style used to render the line (e.g. | |
Qt::PenJoinStyle | penJoinStyle () const |
Returns the pen join style used to render the line (e.g. | |
Qt::PenStyle | penStyle () const |
Returns the pen style used to render the line (e.g. | |
QVariantMap | properties () const override |
Should be reimplemented by subclasses to return a string map that contains the configuration information for the symbol layer. | |
void | renderPolygonStroke (const QPolygonF &points, const QVector< QPolygonF > *rings, QgsSymbolRenderContext &context) override |
Renders the line symbol layer along the outline of polygon, using the given render context. | |
void | renderPolyline (const QPolygonF &points, QgsSymbolRenderContext &context) override |
Renders the line symbol layer along the line joining points, using the given render context. | |
void | setAlignDashPattern (bool enabled) |
Sets whether dash patterns should be aligned to the start and end of lines, by applying subtle tweaks to the pattern sizing in order to ensure that the end of a line is represented by a complete dash element. | |
void | setCustomDashPatternMapUnitScale (const QgsMapUnitScale &scale) |
Sets the map unit scale for lengths used in the custom dash pattern. | |
void | setCustomDashPatternUnit (Qgis::RenderUnit unit) |
Sets the unit for lengths used in the custom dash pattern. | |
void | setCustomDashVector (const QVector< qreal > &vector) |
Sets the custom dash vector, which is the pattern of alternating drawn/skipped lengths used while rendering a custom dash pattern. | |
void | setDashPatternOffset (double offset) |
Sets the dash pattern offset, which dictates how far along the dash pattern the pattern should start rendering at. | |
void | setDashPatternOffsetMapUnitScale (const QgsMapUnitScale &scale) |
Sets the map unit scale for the dash pattern offset. | |
void | setDashPatternOffsetUnit (Qgis::RenderUnit unit) |
Sets the unit for the dash pattern offset. | |
void | setDrawInsidePolygon (bool drawInsidePolygon) |
Sets whether the line should only be drawn inside polygons, and any portion of the line which falls outside the polygon should be clipped away. | |
void | setMapUnitScale (const QgsMapUnitScale &scale) override |
void | setOutputUnit (Qgis::RenderUnit unit) override |
Sets the units to use for sizes and widths within the symbol layer. | |
void | setPenCapStyle (Qt::PenCapStyle style) |
Sets the pen cap style used to render the line (e.g. | |
void | setPenJoinStyle (Qt::PenJoinStyle style) |
Sets the pen join style used to render the line (e.g. | |
void | setPenStyle (Qt::PenStyle style) |
Sets the pen style used to render the line (e.g. | |
void | setTrimDistanceEnd (double distance) |
Sets the trim distance for the end of the line, which dictates a length from the end of the line at which the actual rendering should end. | |
void | setTrimDistanceEndMapUnitScale (const QgsMapUnitScale &scale) |
Sets the map unit scale for the trim distance for the end of the line. | |
void | setTrimDistanceEndUnit (Qgis::RenderUnit unit) |
Sets the unit for the trim distance for the end of the line. | |
void | setTrimDistanceStart (double distance) |
Sets the trim distance for the start of the line, which dictates a length from the start of the line at which the actual rendering should start. | |
void | setTrimDistanceStartMapUnitScale (const QgsMapUnitScale &scale) |
Sets the map unit scale for the trim distance for the start of the line. | |
void | setTrimDistanceStartUnit (Qgis::RenderUnit unit) |
Sets the unit for the trim distance for the start of the line. | |
void | setTweakDashPatternOnCorners (bool enabled) |
Sets whether dash patterns tweaks should be applied on sharp corners, to ensure that a double-length dash is drawn running into and out of the corner. | |
void | setUseCustomDashPattern (bool b) |
Sets whether the line uses a custom dash pattern. | |
void | startRender (QgsSymbolRenderContext &context) override |
Called before a set of rendering operations commences on the supplied render context. | |
void | stopRender (QgsSymbolRenderContext &context) override |
Called after a set of rendering operations has finished on the supplied render context. | |
void | toSld (QDomDocument &doc, QDomElement &element, const QVariantMap &props) const override |
Saves the symbol layer as SLD. | |
double | trimDistanceEnd () const |
Returns the trim distance for the end of the line, which dictates a length from the end of the line at which the actual rendering should end. | |
const QgsMapUnitScale & | trimDistanceEndMapUnitScale () const |
Returns the map unit scale for the trim distance for the end of the line. | |
Qgis::RenderUnit | trimDistanceEndUnit () const |
Returns the unit for the trim distance for the end of the line. | |
double | trimDistanceStart () const |
Returns the trim distance for the start of the line, which dictates a length from the start of the line at which the actual rendering should start. | |
const QgsMapUnitScale & | trimDistanceStartMapUnitScale () const |
Returns the map unit scale for the trim distance for the start of the line. | |
Qgis::RenderUnit | trimDistanceStartUnit () const |
Returns the unit for the trim distance for the start of the line. | |
bool | tweakDashPatternOnCorners () const |
Returns true if dash patterns tweaks should be applied on sharp corners, to ensure that a double-length dash is drawn running into and out of the corner. | |
bool | useCustomDashPattern () const |
Returns true if the line uses a custom dash pattern. | |
bool | usesMapUnits () const override |
Returns true if the symbol layer has any components which use map unit based sizes. | |
Public Member Functions inherited from QgsLineSymbolLayer | |
QgsLineSymbolLayer (const QgsLineSymbolLayer &other)=delete | |
void | drawPreviewIcon (QgsSymbolRenderContext &context, QSize size) override |
double | offset () const |
Returns the line's offset. | |
const QgsMapUnitScale & | offsetMapUnitScale () const |
Returns the map unit scale for the line's offset. | |
Qgis::RenderUnit | offsetUnit () const |
Returns the units for the line's offset. | |
QgsLineSymbolLayer & | operator= (const QgsLineSymbolLayer &other)=delete |
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. | |
void | setOffset (double offset) |
Sets the line's offset. | |
void | setOffsetMapUnitScale (const QgsMapUnitScale &scale) |
Sets the map unit scale for the line's offset. | |
void | setOffsetUnit (Qgis::RenderUnit unit) |
Sets the unit for the line's offset. | |
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. | |
virtual void | setWidth (double width) |
Sets the width of the line symbol layer. | |
void | setWidthMapUnitScale (const QgsMapUnitScale &scale) |
void | setWidthUnit (Qgis::RenderUnit unit) |
Sets the units for the line's width. | |
virtual double | width () const |
Returns the estimated width for the line symbol layer. | |
virtual double | width (const QgsRenderContext &context) const |
Returns the line symbol layer width, in painter units. | |
const QgsMapUnitScale & | widthMapUnitScale () const |
Qgis::RenderUnit | widthUnit () const |
Returns the units for the line's width. | |
Public Member Functions inherited from QgsSymbolLayer | |
QgsSymbolLayer (const QgsSymbolLayer &other)=delete | |
virtual | ~QgsSymbolLayer () |
virtual QColor | color () const |
Returns the "representative" color of the symbol layer. | |
QgsPropertyCollection & | dataDefinedProperties () |
Returns a reference to the symbol layer's property collection, used for data defined overrides. | |
const QgsPropertyCollection & | dataDefinedProperties () const |
Returns a reference to the symbol layer's property collection, used for data defined overrides. | |
virtual double | dxfAngle (QgsSymbolRenderContext &context) const |
Gets angle. | |
virtual QColor | dxfBrushColor (QgsSymbolRenderContext &context) const |
Gets brush/fill color. | |
virtual Qt::BrushStyle | dxfBrushStyle () const |
Gets brush/fill style. | |
virtual double | dxfSize (const QgsDxfExport &e, QgsSymbolRenderContext &context) const |
Gets marker size. | |
bool | enabled () const |
Returns true if symbol layer is enabled and will be drawn. | |
virtual QColor | fillColor () const |
Returns the fill color for the symbol layer. | |
virtual bool | hasDataDefinedProperties () const |
Returns true if the symbol layer (or any of its sub-symbols) contains data defined properties. | |
QString | id () const |
Returns symbol layer identifier This id is unique in the whole project. | |
bool | installMasks (QgsRenderContext &context, bool recursive, const QRectF &rect=QRectF()) |
When rendering, install masks on context painter. | |
virtual bool | isCompatibleWithSymbol (QgsSymbol *symbol) const |
Returns if the layer can be used below the specified symbol. | |
bool | isLocked () const |
Returns true if the symbol layer colors are locked and the layer will ignore any symbol-level color changes. | |
virtual QList< QgsSymbolLayerReference > | masks () const |
Returns masks defined by this symbol layer. | |
QgsSymbolLayer & | operator= (const QgsSymbolLayer &other)=delete |
QgsPaintEffect * | paintEffect () const |
Returns the current paint effect for the layer. | |
virtual void | prepareExpressions (const QgsSymbolRenderContext &context) |
Prepares all data defined property expressions for evaluation. | |
virtual void | prepareMasks (const QgsSymbolRenderContext &context) |
Prepares all mask internal objects according to what is defined in context This should be called prior to calling startRender() method. | |
int | renderingPass () const |
Specifies the rendering pass in which this symbol layer should be rendered. | |
virtual void | setColor (const QColor &color) |
Sets the "representative" color for the symbol layer. | |
void | setDataDefinedProperties (const QgsPropertyCollection &collection) |
Sets the symbol layer's property collection, used for data defined overrides. | |
virtual void | setDataDefinedProperty (Property key, const QgsProperty &property) |
Sets a data defined property for the layer. | |
void | setEnabled (bool enabled) |
Sets whether symbol layer is enabled and should be drawn. | |
virtual void | setFillColor (const QColor &color) |
Sets the fill color for the symbol layer. | |
void | setId (const QString &id) |
Set symbol layer identifier This id has to be unique in the whole project. | |
void | setLocked (bool locked) |
Sets whether the layer's colors are locked. | |
void | setPaintEffect (QgsPaintEffect *effect) |
Sets the current paint effect for the layer. | |
void | setRenderingPass (int renderingPass) |
Specifies the rendering pass in which this symbol layer should be rendered. | |
virtual void | setStrokeColor (const QColor &color) |
Sets the stroke color for the symbol layer. | |
virtual bool | setSubSymbol (QgsSymbol *symbol) |
Sets layer's subsymbol. takes ownership of the passed symbol. | |
void | setUserFlags (Qgis::SymbolLayerUserFlags flags) |
Sets user-controlled flags which control the symbol layer's behavior. | |
virtual void | startFeatureRender (const QgsFeature &feature, QgsRenderContext &context) |
Called before the layer will be rendered for a particular feature. | |
virtual void | stopFeatureRender (const QgsFeature &feature, QgsRenderContext &context) |
Called after the layer has been rendered for a particular feature. | |
virtual QColor | strokeColor () const |
Returns the stroke color for the symbol layer. | |
virtual QgsSymbol * | subSymbol () |
Returns the symbol's sub symbol, if present. | |
Qgis::SymbolType | type () const |
virtual QSet< QString > | usedAttributes (const QgsRenderContext &context) const |
Returns the set of attributes referenced by the layer. | |
Qgis::SymbolLayerUserFlags | userFlags () const |
Returns user-controlled flags which control the symbol layer's behavior. | |
virtual bool | writeDxf (QgsDxfExport &e, double mmMapUnitScaleFactor, const QString &layerName, QgsSymbolRenderContext &context, QPointF shift=QPointF(0.0, 0.0)) const |
write as DXF | |
Static Public Member Functions | |
static QgsSymbolLayer * | create (const QVariantMap &properties=QVariantMap()) |
Creates a new QgsSimpleLineSymbolLayer, using the settings serialized in the properties map (corresponding to the output from QgsSimpleLineSymbolLayer::properties() ). | |
static QgsSymbolLayer * | createFromSld (QDomElement &element) |
Creates a new QgsSimpleLineSymbolLayer from an SLD XML DOM element. | |
Static Public Member Functions inherited from QgsSymbolLayer | |
static const QgsPropertiesDefinition & | propertyDefinitions () |
Returns the symbol layer property definitions. | |
Additional Inherited Members | |
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 class | Property : int { Size = 0 , Angle , Name , FillColor , StrokeColor , StrokeWidth , StrokeStyle , Offset , Character , Width , Height , PreserveAspectRatio , FillStyle , JoinStyle , SecondaryColor , LineAngle , LineDistance , GradientType , CoordinateMode , GradientSpread , GradientReference1X , GradientReference1Y , GradientReference2X , GradientReference2Y , GradientReference1IsCentroid , GradientReference2IsCentroid , BlurRadius , ShapeburstUseWholeShape , ShapeburstMaxDistance , ShapeburstIgnoreRings , File , DistanceX , DistanceY , DisplacementX , DisplacementY , Opacity , CustomDash , CapStyle , Placement , Interval , OffsetAlongLine , AverageAngleLength , HorizontalAnchor , VerticalAnchor , LayerEnabled , ArrowWidth , ArrowStartWidth , ArrowHeadLength , ArrowHeadThickness , ArrowHeadType , ArrowType , OffsetX , OffsetY , PointCount , RandomSeed , ClipPoints , DensityArea , FontFamily , FontStyle , DashPatternOffset , TrimStart , TrimEnd , LineStartWidthValue , LineEndWidthValue , LineStartColorValue , LineEndColorValue , MarkerClipping , RandomOffsetX , RandomOffsetY , LineClipping , SkipMultiples , ShowMarker } |
Data definable properties. More... | |
Protected Member Functions inherited from QgsLineSymbolLayer | |
QgsLineSymbolLayer (bool locked=false) | |
Protected Member Functions inherited from QgsSymbolLayer | |
QgsSymbolLayer (Qgis::SymbolType type, bool locked=false) | |
Constructor for QgsSymbolLayer. | |
void | copyDataDefinedProperties (QgsSymbolLayer *destLayer) const |
Copies all data defined properties of this layer to another symbol layer. | |
void | copyPaintEffect (QgsSymbolLayer *destLayer) const |
Copies paint effect of this layer to another symbol layer. | |
void | removeMasks (QgsRenderContext &context, bool recursive) |
When rendering, remove previously installed masks from context painter if recursive is true masks are removed recursively for all children symbol layers. | |
void | restoreOldDataDefinedProperties (const QVariantMap &stringMap) |
Restores older data defined properties from string map. | |
bool | shouldRenderUsingSelectionColor (const QgsSymbolRenderContext &context) const |
Returns true if the symbol layer should be rendered using the selection color from the render context. | |
Protected Attributes inherited from QgsLineSymbolLayer | |
double | mOffset = 0 |
QgsMapUnitScale | mOffsetMapUnitScale |
Qgis::RenderUnit | mOffsetUnit = Qgis::RenderUnit::Millimeters |
RenderRingFilter | mRingFilter = AllRings |
double | mWidth = 0 |
QgsMapUnitScale | mWidthMapUnitScale |
Qgis::RenderUnit | mWidthUnit = Qgis::RenderUnit::Millimeters |
Protected Attributes inherited from QgsSymbolLayer | |
QPainterPath | mClipPath |
QColor | mColor |
QgsPropertyCollection | mDataDefinedProperties |
bool | mEnabled = true |
True if layer is enabled and should be drawn. | |
QgsFields | mFields |
QString | mId |
bool | mLocked = false |
std::unique_ptr< QgsPaintEffect > | mPaintEffect |
int | mRenderingPass = 0 |
Qgis::SymbolType | mType |
Qgis::SymbolLayerUserFlags | mUserFlags |
User controlled flags. | |
Static Protected Attributes inherited from QgsSymbolLayer | |
static const bool | SELECT_FILL_BORDER = false |
Whether fill styles for selected features also highlight symbol stroke. | |
static const bool | SELECT_FILL_STYLE = false |
Whether fill styles for selected features uses symbol layer style. | |
static const bool | SELECTION_IS_OPAQUE = true |
Whether styles for selected features ignore symbol alpha. | |
A simple line symbol layer, which renders lines using a line in a variety of styles (e.g.
solid, dotted, dashed).
Definition at line 44 of file qgslinesymbollayer.h.
QgsSimpleLineSymbolLayer::QgsSimpleLineSymbolLayer | ( | const QColor & | color = DEFAULT_SIMPLELINE_COLOR , |
double | width = DEFAULT_SIMPLELINE_WIDTH , |
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Qt::PenStyle | penStyle = DEFAULT_SIMPLELINE_PENSTYLE |
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Constructor for QgsSimpleLineSymbolLayer.
Creates a simple line symbol in the specified color, width (in millimeters) and penStyle.
Definition at line 43 of file qgslinesymbollayer.cpp.
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bool QgsSimpleLineSymbolLayer::alignDashPattern | ( | ) | const |
Returns true
if dash patterns should be aligned to the start and end of lines, by applying subtle tweaks to the pattern sizing in order to ensure that the end of a line is represented by a complete dash element.
Definition at line 1134 of file qgslinesymbollayer.cpp.
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Returns true
if the symbol layer rendering can cause visible artifacts across a single feature when the feature is rendered as a series of adjacent map tiles each containing a portion of the feature's geometry.
The default implementation returns false
.
Reimplemented from QgsSymbolLayer.
Definition at line 1129 of file qgslinesymbollayer.cpp.
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Shall be reimplemented by subclasses to create a deep copy of the instance.
Implements QgsSymbolLayer.
Definition at line 545 of file qgslinesymbollayer.cpp.
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Creates a new QgsSimpleLineSymbolLayer, using the settings serialized in the properties map (corresponding to the output from QgsSimpleLineSymbolLayer::properties() ).
Definition at line 99 of file qgslinesymbollayer.cpp.
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Creates a new QgsSimpleLineSymbolLayer from an SLD XML DOM element.
Definition at line 626 of file qgslinesymbollayer.cpp.
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Returns the map unit scale for lengths used in the custom dash pattern.
Definition at line 171 of file qgslinesymbollayer.h.
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Returns the units for lengths used in the custom dash pattern.
Definition at line 165 of file qgslinesymbollayer.h.
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Returns the custom dash vector, which is the pattern of alternating drawn/skipped lengths used while rendering a custom dash pattern.
Units for the vector are specified by customDashPatternUnit()
This setting is only used when useCustomDashPattern() returns true
.
Definition at line 191 of file qgslinesymbollayer.h.
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Returns the dash pattern offset, which dictates how far along the dash pattern the pattern should start rendering at.
Offset units can be retrieved by calling dashPatternOffsetUnit().
Definition at line 219 of file qgslinesymbollayer.h.
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Returns the map unit scale for the dash pattern offset value.
Definition at line 266 of file qgslinesymbollayer.h.
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Returns the units for the dash pattern offset.
Definition at line 255 of file qgslinesymbollayer.h.
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Returns true
if the line should only be drawn inside polygons, and any portion of the line which falls outside the polygon should be clipped away.
This setting only has an effect when the line symbol is being used to render polygon rings.
Definition at line 444 of file qgslinesymbollayer.h.
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Gets color.
Reimplemented from QgsSymbolLayer.
Definition at line 1119 of file qgslinesymbollayer.cpp.
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Gets dash pattern.
Reimplemented from QgsSymbolLayer.
Definition at line 1091 of file qgslinesymbollayer.cpp.
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Gets offset.
Reimplemented from QgsSymbolLayer.
Definition at line 1154 of file qgslinesymbollayer.cpp.
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Gets pen style.
Reimplemented from QgsSymbolLayer.
Definition at line 1097 of file qgslinesymbollayer.cpp.
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Gets line width.
Reimplemented from QgsLineSymbolLayer.
Definition at line 1102 of file qgslinesymbollayer.cpp.
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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 1077 of file qgslinesymbollayer.cpp.
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Returns flags which control the symbol layer's behavior.
Reimplemented from QgsSymbolLayer.
Definition at line 234 of file qgslinesymbollayer.cpp.
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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 229 of file qgslinesymbollayer.cpp.
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Reimplemented from QgsLineSymbolLayer.
Definition at line 88 of file qgslinesymbollayer.cpp.
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Reimplemented from QgsSymbolLayer.
Definition at line 611 of file qgslinesymbollayer.cpp.
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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.
Reimplemented from QgsLineSymbolLayer.
Definition at line 64 of file qgslinesymbollayer.cpp.
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Returns the pen cap style used to render the line (e.g.
flat, square, round, etc).
Definition at line 130 of file qgslinesymbollayer.h.
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Returns the pen join style used to render the line (e.g.
miter, bevel, round, etc).
Definition at line 116 of file qgslinesymbollayer.h.
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Returns the pen style used to render the line (e.g.
solid, dashed, etc).
Definition at line 102 of file qgslinesymbollayer.h.
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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.
Implements QgsSymbolLayer.
Definition at line 512 of file qgslinesymbollayer.cpp.
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Renders the line symbol layer along the outline of polygon, using the given render context.
The exterior ring of the polygon is specified in points. Optionally, interior rings are set via the rings argument.
Reimplemented from QgsLineSymbolLayer.
Definition at line 290 of file qgslinesymbollayer.cpp.
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Renders the line symbol layer along the line joining points, using the given render context.
Implements QgsLineSymbolLayer.
Definition at line 378 of file qgslinesymbollayer.cpp.
void QgsSimpleLineSymbolLayer::setAlignDashPattern | ( | bool | enabled | ) |
Sets whether dash patterns should be aligned to the start and end of lines, by applying subtle tweaks to the pattern sizing in order to ensure that the end of a line is represented by a complete dash element.
Definition at line 1139 of file qgslinesymbollayer.cpp.
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Sets the map unit scale for lengths used in the custom dash pattern.
Definition at line 177 of file qgslinesymbollayer.h.
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Sets the unit for lengths used in the custom dash pattern.
Definition at line 159 of file qgslinesymbollayer.h.
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Sets the custom dash vector, which is the pattern of alternating drawn/skipped lengths used while rendering a custom dash pattern.
Units for the vector are specified by customDashPatternUnit()
This setting is only used when useCustomDashPattern() returns true
.
Definition at line 205 of file qgslinesymbollayer.h.
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Sets the dash pattern offset, which dictates how far along the dash pattern the pattern should start rendering at.
Offset units are set via setDashPatternOffsetUnit().
Definition at line 233 of file qgslinesymbollayer.h.
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Sets the map unit scale for the dash pattern offset.
Definition at line 277 of file qgslinesymbollayer.h.
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Sets the unit for the dash pattern offset.
Definition at line 244 of file qgslinesymbollayer.h.
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Sets whether the line should only be drawn inside polygons, and any portion of the line which falls outside the polygon should be clipped away.
This setting only has an effect when the line symbol is being used to render polygon rings.
Definition at line 455 of file qgslinesymbollayer.h.
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Reimplemented from QgsLineSymbolLayer.
Definition at line 80 of file qgslinesymbollayer.cpp.
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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.
unit | output units |
Reimplemented from QgsLineSymbolLayer.
Definition at line 53 of file qgslinesymbollayer.cpp.
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Sets the pen cap style used to render the line (e.g.
flat, square, round, etc).
Definition at line 137 of file qgslinesymbollayer.h.
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Sets the pen join style used to render the line (e.g.
miter, bevel, round, etc).
Definition at line 123 of file qgslinesymbollayer.h.
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Sets the pen style used to render the line (e.g.
solid, dashed, etc).
Definition at line 109 of file qgslinesymbollayer.h.
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Sets the trim distance for the end of the line, which dictates a length from the end of the line at which the actual rendering should end.
Trim units can be set by calling setTrimDistanceEndUnit().
Definition at line 385 of file qgslinesymbollayer.h.
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Sets the map unit scale for the trim distance for the end of the line.
Definition at line 433 of file qgslinesymbollayer.h.
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Sets the unit for the trim distance for the end of the line.
Definition at line 397 of file qgslinesymbollayer.h.
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Sets the trim distance for the start of the line, which dictates a length from the start of the line at which the actual rendering should start.
Trim units can be set by calling setTrimDistanceStartUnit().
Definition at line 307 of file qgslinesymbollayer.h.
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inline |
Sets the map unit scale for the trim distance for the start of the line.
Definition at line 355 of file qgslinesymbollayer.h.
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inline |
Sets the unit for the trim distance for the start of the line.
Definition at line 319 of file qgslinesymbollayer.h.
void QgsSimpleLineSymbolLayer::setTweakDashPatternOnCorners | ( | bool | enabled | ) |
Sets whether dash patterns tweaks should be applied on sharp corners, to ensure that a double-length dash is drawn running into and out of the corner.
true
.Definition at line 1149 of file qgslinesymbollayer.cpp.
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Sets whether the line uses a custom dash pattern.
Definition at line 153 of file qgslinesymbollayer.h.
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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.
Implements QgsSymbolLayer.
Definition at line 239 of file qgslinesymbollayer.cpp.
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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.
Implements QgsSymbolLayer.
Definition at line 285 of file qgslinesymbollayer.cpp.
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overridevirtual |
Saves the symbol layer as SLD.
Reimplemented from QgsSymbolLayer.
Definition at line 578 of file qgslinesymbollayer.cpp.
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Returns the trim distance for the end of the line, which dictates a length from the end of the line at which the actual rendering should end.
Trim units can be retrieved by calling trimDistanceEndUnit().
Definition at line 370 of file qgslinesymbollayer.h.
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inline |
Returns the map unit scale for the trim distance for the end of the line.
Definition at line 421 of file qgslinesymbollayer.h.
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inline |
Returns the unit for the trim distance for the end of the line.
Definition at line 409 of file qgslinesymbollayer.h.
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inline |
Returns the trim distance for the start of the line, which dictates a length from the start of the line at which the actual rendering should start.
Trim units can be retrieved by calling trimDistanceStartUnit().
Definition at line 292 of file qgslinesymbollayer.h.
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inline |
Returns the map unit scale for the trim distance for the start of the line.
Definition at line 343 of file qgslinesymbollayer.h.
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Returns the unit for the trim distance for the start of the line.
Definition at line 331 of file qgslinesymbollayer.h.
bool QgsSimpleLineSymbolLayer::tweakDashPatternOnCorners | ( | ) | const |
Returns true
if dash patterns tweaks should be applied on sharp corners, to ensure that a double-length dash is drawn running into and out of the corner.
true
.Definition at line 1144 of file qgslinesymbollayer.cpp.
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Returns true
if the line uses a custom dash pattern.
Definition at line 145 of file qgslinesymbollayer.h.
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Returns true
if the symbol layer has any components which use map unit based sizes.
Reimplemented from QgsSymbolLayer.
Definition at line 74 of file qgslinesymbollayer.cpp.