16 #ifndef QGSARROWSYMBOLLAYER_H 17 #define QGSARROWSYMBOLLAYER_H 19 #include "qgis_core.h" 146 void setColor(
const QColor &
c )
override;
147 QColor
color()
const override;
155 std::unique_ptr<QgsFillSymbol> mSymbol;
157 double mArrowWidth = 1.0;
161 double mArrowStartWidth = 1.0;
165 double mHeadLength = 1.5;
168 double mHeadThickness = 1.5;
174 bool mIsCurved =
true;
175 bool mIsRepeated =
true;
177 double mScaledArrowWidth = 1.0;
178 double mScaledArrowStartWidth = 1.0;
179 double mScaledHeadLength = 1.5;
180 double mScaledHeadThickness = 1.5;
181 double mScaledOffset = 0.0;
182 HeadType mComputedHeadType = HeadSingle;
183 ArrowType mComputedArrowType = ArrowPlain;
185 std::unique_ptr<QgsExpressionContextScope> mExpressionScope;
void setHeadThicknessUnitScale(const QgsMapUnitScale &scale)
Sets the scale for the head height.
void setHeadLengthUnit(QgsUnitTypes::RenderUnit unit)
Sets the unit for the head length.
QgsUnitTypes::RenderUnit headThicknessUnit() const
Gets the unit for the head height.
Abstract base class for all rendered symbols.
double arrowStartWidth() const
Gets current arrow start width. Only meaningful for single headed arrows.
double arrowWidth() const
Gets current arrow width.
void setArrowWidthUnit(QgsUnitTypes::RenderUnit unit)
Sets the unit for the arrow width.
QgsMapUnitScale arrowStartWidthUnitScale() const
Gets the scale for the arrow start width.
QgsMapUnitScale headLengthUnitScale() const
Gets the scale for the head length.
void setHeadThicknessUnit(QgsUnitTypes::RenderUnit unit)
Sets the unit for the head height.
ArrowType arrowType() const
Gets the current arrow type.
virtual double width() const
Returns the estimated width for the line symbol layer.
virtual void renderPolyline(const QPolygonF &points, QgsSymbolRenderContext &context)=0
Renders the line symbol layer along the line joining points, using the given render context...
QgsSymbol * subSymbol() override
Returns the symbol's sub symbol, if present.
virtual bool hasDataDefinedProperties() const
Returns true if the symbol layer (or any of its sub-symbols) contains data defined properties...
virtual void setColor(const QColor &color)
The fill color.
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into c
bool isRepeated() const
Returns whether the arrow is repeated along the line or not.
virtual bool setSubSymbol(QgsSymbol *symbol)
Sets layer's subsymbol. takes ownership of the passed symbol.
void setHeadLength(double length)
Sets the arrow head length.
void setHeadThickness(double thickness)
Sets the arrow head height.
QgsUnitTypes::RenderUnit arrowStartWidthUnit() const
Gets the unit for the arrow start width.
virtual QgsSymbolLayer * clone() const =0
Shall be reimplemented by subclasses to create a deep copy of the instance.
virtual QColor color() const
The fill color.
void setArrowWidth(double width)
Sets the arrow width.
ArrowType
Possible arrow types.
bool isCurved() const
Returns whether it is a curved arrow or a straight one.
double headLength() const
Gets the current arrow head length.
void setIsRepeated(bool isRepeated)
Sets whether the arrow is repeated along the line.
QgsSymbol::SymbolType type() const
QgsMapUnitScale arrowWidthUnitScale() const
Gets the scale for the arrow width.
QgsUnitTypes::RenderUnit arrowWidthUnit() const
Gets the unit for the arrow width.
void setIsCurved(bool isCurved)
Sets whether it is a curved arrow or a straight one.
virtual QSet< QString > usedAttributes(const QgsRenderContext &context) const
Returns the set of attributes referenced by the layer.
Contains information about the context of a rendering operation.
void setHeadLengthUnitScale(const QgsMapUnitScale &scale)
Sets the scale for the head length.
void setArrowType(ArrowType type)
Sets the arrow type.
virtual void stopRender(QgsSymbolRenderContext &context)=0
Called after a set of rendering operations has finished on the supplied render context.
Struct for storing maximum and minimum scales for measurements in map units.
virtual QVariantMap properties() const =0
Should be reimplemented by subclasses to return a string map that contains the configuration informat...
void setArrowWidthUnitScale(const QgsMapUnitScale &scale)
Sets the scale for the arrow width.
QgsUnitTypes::RenderUnit headLengthUnit() const
Gets the unit for the head length.
void setHeadType(HeadType type)
Sets the head type.
QgsMapUnitScale headThicknessUnitScale() const
Gets the scale for the head height.
Line symbol layer used for representing lines as arrows.
HeadType
Possible head types.
void setArrowStartWidthUnit(QgsUnitTypes::RenderUnit unit)
Sets the unit for the arrow start width.
HeadType headType() const
Gets the current head type.
void setArrowStartWidth(double width)
Sets the arrow start width.
virtual bool usesMapUnits() const
Returns true if the symbol layer has any components which use map unit based sizes.
RenderUnit
Rendering size units.
void setArrowStartWidthUnitScale(const QgsMapUnitScale &scale)
Sets the scale for the arrow start width.
virtual void startRender(QgsSymbolRenderContext &context)=0
Called before a set of rendering operations commences on the supplied render context.
virtual QString layerType() const =0
Returns a string that represents this layer type.
double headThickness() const
Gets the current arrow head height.