QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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A symbol layer that represents vector layer line feature as interpolated line The interpolation is done between two values defined at the extremities. More...
#include <qgsinterpolatedlinerenderer.h>
Public Member Functions | |
QgsInterpolatedLineSymbolLayer () | |
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. | |
QgsInterpolatedLineSymbolLayer * | clone () const override |
Shall be reimplemented by subclasses to create a deep copy of the instance. | |
QColor | color () const override |
Returns the "representative" color of the symbol layer. | |
void | drawPreviewIcon (QgsSymbolRenderContext &context, QSize size) override |
Q_DECL_DEPRECATED QString | endValueExpressionForColor () const |
Returns the expression related to the end extremity value for width for color. | |
Q_DECL_DEPRECATED QString | endValueExpressionForWidth () const |
Returns the expression related to the end extremity value for width. | |
Qgis::SymbolLayerFlags | flags () const override |
Returns flags which control the symbol layer's behavior. | |
QgsInterpolatedLineColor | interpolatedColor () const |
Returns the interpolated color used to render the colors of lines, see QgsInterpolatedLineColor. | |
QgsInterpolatedLineWidth | interpolatedWidth () const |
Returns the interpolated width used to render the width of lines, see QgsInterpolatedLineWidth. | |
QString | layerType () const override |
Returns a string that represents this layer type. | |
QVariantMap | properties () const override |
Should be reimplemented by subclasses to return a string map that contains the configuration information for the symbol layer. | |
void | renderPolyline (const QPolygonF &points, QgsSymbolRenderContext &context) override |
Renders the line symbol layer along the line joining points, using the given render context. | |
Q_DECL_DEPRECATED void | setExpressionsStringForColor (const QString &start, const QString &end) |
Sets the expressions (as string) that define the extremety values af the line feature for color. | |
Q_DECL_DEPRECATED void | setExpressionsStringForWidth (const QString &start, const QString &end) |
Sets the expressions (as string) that define the extremety values af the line feature for width. | |
void | setInterpolatedColor (const QgsInterpolatedLineColor &interpolatedLineColor) |
Sets the interpolated color used to render the colors of lines, see QgsInterpolatedLineColor. | |
void | setInterpolatedWidth (const QgsInterpolatedLineWidth &interpolatedLineWidth) |
Sets the interpolated width used to render the width of lines, see QgsInterpolatedLineWidth. | |
void | setWidthUnit (Qgis::RenderUnit strokeWidthUnit) |
Sets the width unit. | |
void | startFeatureRender (const QgsFeature &feature, QgsRenderContext &context) override |
Called before the layer will be rendered for a particular feature. | |
void | startRender (QgsSymbolRenderContext &context) override |
Called before a set of rendering operations commences on the supplied render context. | |
Q_DECL_DEPRECATED QString | startValueExpressionForColor () const |
Returns the epression related to the start extremity value for width for color. | |
Q_DECL_DEPRECATED QString | startValueExpressionForWidth () const |
Returns the epression related to the start extremity value for width. | |
void | stopFeatureRender (const QgsFeature &feature, QgsRenderContext &context) override |
Called after the layer has been rendered for a particular feature. | |
void | stopRender (QgsSymbolRenderContext &context) override |
Called after a set of rendering operations has finished on the supplied render context. | |
Qgis::RenderUnit | widthUnit () const |
Returns the width unit. | |
Public Member Functions inherited from QgsLineSymbolLayer | |
QgsLineSymbolLayer (const QgsLineSymbolLayer &other)=delete | |
void | drawPreviewIcon (QgsSymbolRenderContext &context, QSize size) override |
double | dxfWidth (const QgsDxfExport &e, QgsSymbolRenderContext &context) const override |
Gets line width. | |
QgsMapUnitScale | mapUnitScale () const 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 |
Qgis::RenderUnit | outputUnit () const override |
Returns the units to use for sizes and widths within the symbol layer. | |
virtual void | renderPolygonStroke (const QPolygonF &points, const QVector< QPolygonF > *rings, QgsSymbolRenderContext &context) |
Renders the line symbol layer along the outline of polygon, using the given render context. | |
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 | setMapUnitScale (const QgsMapUnitScale &scale) override |
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 | setOutputUnit (Qgis::RenderUnit unit) override |
Sets the units to use for sizes and widths within the symbol layer. | |
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 () |
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 QColor | dxfColor (QgsSymbolRenderContext &context) const |
Gets color. | |
virtual QVector< qreal > | dxfCustomDashPattern (Qgis::RenderUnit &unit) const |
Gets dash pattern. | |
virtual double | dxfOffset (const QgsDxfExport &e, QgsSymbolRenderContext &context) const |
Gets offset. | |
virtual Qt::PenStyle | dxfPenStyle () const |
Gets pen 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 double | estimateMaxBleed (const QgsRenderContext &context) const |
Returns the estimated maximum distance which the layer style will bleed outside the drawn shape when drawn in the specified /a context. | |
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. | |
virtual QString | ogrFeatureStyle (double mmScaleFactor, double mapUnitScaleFactor) const |
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 QColor | strokeColor () const |
Returns the stroke color for the symbol layer. | |
virtual QgsSymbol * | subSymbol () |
Returns the symbol's sub symbol, if present. | |
virtual void | toSld (QDomDocument &doc, QDomElement &element, const QVariantMap &props) const |
Saves the symbol layer as SLD. | |
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 | usesMapUnits () const |
Returns true if the symbol layer has any components which use map unit based sizes. | |
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) |
Creates the symbol layer. | |
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 symbol layer that represents vector layer line feature as interpolated line The interpolation is done between two values defined at the extremities.
Definition at line 283 of file qgsinterpolatedlinerenderer.h.
QgsInterpolatedLineSymbolLayer::QgsInterpolatedLineSymbolLayer | ( | ) |
Definition at line 1107 of file qgsinterpolatedlinerenderer.cpp.
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overridevirtual |
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
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Reimplemented from QgsSymbolLayer.
Definition at line 1222 of file qgsinterpolatedlinerenderer.cpp.
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overridevirtual |
Shall be reimplemented by subclasses to create a deep copy of the instance.
Implements QgsSymbolLayer.
Definition at line 816 of file qgsinterpolatedlinerenderer.cpp.
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overridevirtual |
Returns the "representative" color of the symbol layer.
Depending on the symbol layer type, this will have different meaning. For instance, a line symbol layer will generally return the stroke color of the layer, while a fill symbol layer will return the "fill" color instead of stroke.
Some symbol layer types will return an invalid QColor if they have no representative color associated (e.g. raster image based symbol layers).
Reimplemented from QgsSymbolLayer.
Definition at line 932 of file qgsinterpolatedlinerenderer.cpp.
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static |
Creates the symbol layer.
Definition at line 824 of file qgsinterpolatedlinerenderer.cpp.
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overridevirtual |
Implements QgsSymbolLayer.
Definition at line 899 of file qgsinterpolatedlinerenderer.cpp.
QString QgsInterpolatedLineSymbolLayer::endValueExpressionForColor | ( | ) | const |
Returns the expression related to the end extremity value for width for color.
Definition at line 1000 of file qgsinterpolatedlinerenderer.cpp.
QString QgsInterpolatedLineSymbolLayer::endValueExpressionForWidth | ( | ) | const |
Returns the expression related to the end extremity value for width.
Definition at line 963 of file qgsinterpolatedlinerenderer.cpp.
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overridevirtual |
Returns flags which control the symbol layer's behavior.
Reimplemented from QgsSymbolLayer.
Definition at line 869 of file qgsinterpolatedlinerenderer.cpp.
QgsInterpolatedLineColor QgsInterpolatedLineSymbolLayer::interpolatedColor | ( | ) | const |
Returns the interpolated color used to render the colors of lines, see QgsInterpolatedLineColor.
Definition at line 1010 of file qgsinterpolatedlinerenderer.cpp.
QgsInterpolatedLineWidth QgsInterpolatedLineSymbolLayer::interpolatedWidth | ( | ) | const |
Returns the interpolated width used to render the width of lines, see QgsInterpolatedLineWidth.
Definition at line 980 of file qgsinterpolatedlinerenderer.cpp.
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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 806 of file qgsinterpolatedlinerenderer.cpp.
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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.
Implements QgsSymbolLayer.
Definition at line 876 of file qgsinterpolatedlinerenderer.cpp.
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overridevirtual |
Renders the line symbol layer along the line joining points, using the given render context.
Implements QgsLineSymbolLayer.
Definition at line 1202 of file qgsinterpolatedlinerenderer.cpp.
void QgsInterpolatedLineSymbolLayer::setExpressionsStringForColor | ( | const QString & | start, |
const QString & | end | ||
) |
Sets the expressions (as string) that define the extremety values af the line feature for color.
Definition at line 982 of file qgsinterpolatedlinerenderer.cpp.
void QgsInterpolatedLineSymbolLayer::setExpressionsStringForWidth | ( | const QString & | start, |
const QString & | end | ||
) |
Sets the expressions (as string) that define the extremety values af the line feature for width.
Definition at line 945 of file qgsinterpolatedlinerenderer.cpp.
void QgsInterpolatedLineSymbolLayer::setInterpolatedColor | ( | const QgsInterpolatedLineColor & | interpolatedLineColor | ) |
Sets the interpolated color used to render the colors of lines, see QgsInterpolatedLineColor.
Definition at line 1005 of file qgsinterpolatedlinerenderer.cpp.
void QgsInterpolatedLineSymbolLayer::setInterpolatedWidth | ( | const QgsInterpolatedLineWidth & | interpolatedLineWidth | ) |
Sets the interpolated width used to render the width of lines, see QgsInterpolatedLineWidth.
Definition at line 975 of file qgsinterpolatedlinerenderer.cpp.
void QgsInterpolatedLineSymbolLayer::setWidthUnit | ( | Qgis::RenderUnit | strokeWidthUnit | ) |
Sets the width unit.
Definition at line 968 of file qgsinterpolatedlinerenderer.cpp.
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overridevirtual |
Called before the layer will be rendered for a particular feature.
This is always followed by a call to stopFeatureRender() after the feature has been completely rendered (i.e. all parts have been rendered).
The default implementation does nothing.
Reimplemented from QgsSymbolLayer.
Definition at line 1110 of file qgsinterpolatedlinerenderer.cpp.
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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.
Implements QgsSymbolLayer.
Definition at line 808 of file qgsinterpolatedlinerenderer.cpp.
QString QgsInterpolatedLineSymbolLayer::startValueExpressionForColor | ( | ) | const |
Returns the epression related to the start extremity value for width for color.
Definition at line 995 of file qgsinterpolatedlinerenderer.cpp.
QString QgsInterpolatedLineSymbolLayer::startValueExpressionForWidth | ( | ) | const |
Returns the epression related to the start extremity value for width.
Definition at line 958 of file qgsinterpolatedlinerenderer.cpp.
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overridevirtual |
Called after the layer has been rendered for a particular feature.
This is always preceded by a call to startFeatureRender() just before the feature will be rendered.
The default implementation does nothing.
Reimplemented from QgsSymbolLayer.
Definition at line 1116 of file qgsinterpolatedlinerenderer.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 812 of file qgsinterpolatedlinerenderer.cpp.
Qgis::RenderUnit QgsInterpolatedLineSymbolLayer::widthUnit | ( | ) | const |
Returns the width unit.
Definition at line 973 of file qgsinterpolatedlinerenderer.cpp.