#include <qgssymbol.h>

Public Member Functions
	QgsSymbolRenderContext (QgsRenderContext &c, QgsUnitTypes::RenderUnit u, qreal opacity=1.0, bool selected=false, QgsSymbol::RenderHints renderHints=nullptr, const QgsFeature *f=nullptr, const QgsFields &fields=QgsFields(), const QgsMapUnitScale &mapUnitScale=QgsMapUnitScale())
	Constructor for QgsSymbolRenderContext. More...

	QgsSymbolRenderContext (const QgsSymbolRenderContext &rh)=delete
	QgsSymbolRenderContext cannot be copied. More...

QgsExpressionContextScope *	expressionContextScope ()
	This scope is always available when a symbol of this type is being rendered. More...

const QgsFeature *	feature () const
	Current feature being rendered - may be null. More...

QgsFields	fields () const
	Fields of the layer. More...

int	geometryPartCount () const
	Part count of current geometry. More...

int	geometryPartNum () const
	Part number of current geometry. More...

QgsMapUnitScale	mapUnitScale () const

qreal	opacity () const
	Returns the opacity for the symbol. More...

QgsSymbolRenderContext &	operator= (const QgsSymbolRenderContext &)

QgsWkbTypes::GeometryType	originalGeometryType () const
	Returns the geometry type for the original feature geometry being rendered. More...

double	outputLineWidth (double width) const

double	outputPixelSize (double size) const

QgsUnitTypes::RenderUnit	outputUnit () const
	Returns the output unit for the context. More...

QgsRenderContext &	renderContext ()
	Returns a reference to the context's render context. More...

const QgsRenderContext &	renderContext () const
	Returns a reference to the context's render context. More...

QgsSymbol::RenderHints	renderHints () const
	Returns the rendering hint flags for the symbol. More...

bool	selected () const

void	setExpressionContextScope (QgsExpressionContextScope *contextScope)
	Set an expression scope for this symbol. More...

void	setFeature (const QgsFeature *f)

void	setGeometryPartCount (int count)
	Sets the part count of current geometry. More...

void	setGeometryPartNum (int num)
	Sets the part number of current geometry. More...

void	setMapUnitScale (const QgsMapUnitScale &scale)

void	setOpacity (qreal opacity)
	Sets the opacity for the symbol. More...

void	setOriginalGeometryType (QgsWkbTypes::GeometryType type)
	Sets the geometry type for the original feature geometry being rendered. More...

void	setOriginalValueVariable (const QVariant &value)
	Sets the original value variable value for data defined symbology. More...

void	setOutputUnit (QgsUnitTypes::RenderUnit u)
	Sets the output unit for the context. More...

void	setRenderHints (QgsSymbol::RenderHints hints)
	Sets rendering hint flags for the symbol. More...

void	setSelected (bool selected)

Detailed Description

Definition at line 549 of file qgssymbol.h.

Constructor & Destructor Documentation

QgsSymbolRenderContext::QgsSymbolRenderContext	(	QgsRenderContext &	c,
		QgsUnitTypes::RenderUnit	u,
		qreal	opacity = `1.0`,
		bool	selected = `false`,
		QgsSymbol::RenderHints	renderHints = `nullptr`,
		const QgsFeature *	f = `nullptr`,
		const QgsFields &	fields = `QgsFields()`,
		const QgsMapUnitScale &	mapUnitScale = `QgsMapUnitScale()`
	)

Constructor for QgsSymbolRenderContext.

Parameters

c
u
opacity	value between 0 (fully transparent) and 1 (fully opaque)
selected	set to true if symbol should be drawn in a "selected" state
renderHints	flags controlling rendering behavior
f
fields
mapUnitScale

Definition at line 1077 of file qgssymbol.cpp.

QgsSymbolRenderContext::QgsSymbolRenderContext ( const QgsSymbolRenderContext & rh )

delete

QgsSymbolRenderContext cannot be copied.

Member Function Documentation

QgsExpressionContextScope * QgsSymbolRenderContext::expressionContextScope ( )

This scope is always available when a symbol of this type is being rendered.

Returns: An expression scope for details about this symbol

Definition at line 1116 of file qgssymbol.cpp.

const QgsFeature* QgsSymbolRenderContext::feature ( ) const

inline

Current feature being rendered - may be null.

Definition at line 628 of file qgssymbol.h.

QgsFields QgsSymbolRenderContext::fields ( ) const

inline

Fields of the layer.

Currently only available in startRender() calls to allow symbols with data-defined properties prepare the expressions (other times fields() returns null)

Since: QGIS 2.4

Definition at line 653 of file qgssymbol.h.

int QgsSymbolRenderContext::geometryPartCount ( ) const

inline

Part count of current geometry.

Since: QGIS 2.16

Definition at line 659 of file qgssymbol.h.

int QgsSymbolRenderContext::geometryPartNum ( ) const

inline

Part number of current geometry.

Since: QGIS 2.16

Definition at line 671 of file qgssymbol.h.

QgsMapUnitScale QgsSymbolRenderContext::mapUnitScale ( ) const

inline

Definition at line 594 of file qgssymbol.h.

qreal QgsSymbolRenderContext::opacity ( ) const

inline

Returns the opacity for the symbol.

Returns: opacity value between 0 (fully transparent) and 1 (fully opaque)

See also: setOpacity()

Definition at line 602 of file qgssymbol.h.

QgsSymbolRenderContext & QgsSymbolRenderContext::operator= ( const QgsSymbolRenderContext & )

Definition at line 1106 of file qgssymbol.cpp.

QgsWkbTypes::GeometryType QgsSymbolRenderContext::originalGeometryType ( ) const

inline

Returns the geometry type for the original feature geometry being rendered.

This can be useful if symbol layers alter their appearance based on geometry type - eg offsetting a simple line style will look different if the simple line is rendering a polygon feature (a closed buffer) vs a line feature (an unclosed offset line).

See also: originalGeometryType()

Since: QGIS 3.0

Definition at line 645 of file qgssymbol.h.

double QgsSymbolRenderContext::outputLineWidth ( double width ) const

Definition at line 1096 of file qgssymbol.cpp.

double QgsSymbolRenderContext::outputPixelSize ( double size ) const

Definition at line 1101 of file qgssymbol.cpp.

QgsUnitTypes::RenderUnit QgsSymbolRenderContext::outputUnit ( ) const

inline

Returns the output unit for the context.

Definition at line 589 of file qgssymbol.h.

QgsRenderContext& QgsSymbolRenderContext::renderContext ( )

inline

Returns a reference to the context's render context.

Definition at line 572 of file qgssymbol.h.

const QgsRenderContext& QgsSymbolRenderContext::renderContext ( ) const

inline

Returns a reference to the context's render context.

Note: Not available in Python bindings.

Definition at line 578 of file qgssymbol.h.

QgsSymbol::RenderHints QgsSymbolRenderContext::renderHints ( ) const

inline

Returns the rendering hint flags for the symbol.

See also: setRenderHints()

Definition at line 618 of file qgssymbol.h.

bool QgsSymbolRenderContext::selected ( ) const

inline

Definition at line 611 of file qgssymbol.h.

void QgsSymbolRenderContext::setExpressionContextScope ( QgsExpressionContextScope * contextScope )

Set an expression scope for this symbol.

Will take ownership.

Parameters

contextScope An expression scope for details about this symbol

Definition at line 1121 of file qgssymbol.cpp.

void QgsSymbolRenderContext::setFeature ( const QgsFeature * f )

inline

Definition at line 626 of file qgssymbol.h.

void QgsSymbolRenderContext::setGeometryPartCount ( int count )

inline

Sets the part count of current geometry.

Since: QGIS 2.16

Definition at line 665 of file qgssymbol.h.

void QgsSymbolRenderContext::setGeometryPartNum ( int num )

inline

Sets the part number of current geometry.

Since: QGIS 2.16

Definition at line 677 of file qgssymbol.h.

void QgsSymbolRenderContext::setMapUnitScale ( const QgsMapUnitScale & scale )

inline

Definition at line 595 of file qgssymbol.h.

void QgsSymbolRenderContext::setOpacity ( qreal opacity )

inline

Sets the opacity for the symbol.

Parameters

opacity opacity value between 0 (fully transparent) and 1 (fully opaque)

See also: opacity()

Definition at line 609 of file qgssymbol.h.

void QgsSymbolRenderContext::setOriginalGeometryType ( QgsWkbTypes::GeometryType type )

inline

Sets the geometry type for the original feature geometry being rendered.

See also: originalGeometryType()

Since: QGIS 3.0

Definition at line 635 of file qgssymbol.h.

void QgsSymbolRenderContext::setOriginalValueVariable ( const QVariant & value )

Sets the original value variable value for data defined symbology.

Parameters

value value for original value variable. This usually represents the symbol property value before any data defined overrides have been applied.

Since: QGIS 2.12

Definition at line 1091 of file qgssymbol.cpp.

void QgsSymbolRenderContext::setOutputUnit ( QgsUnitTypes::RenderUnit u )

inline

Sets the output unit for the context.

Definition at line 592 of file qgssymbol.h.

void QgsSymbolRenderContext::setRenderHints ( QgsSymbol::RenderHints hints )

inline

Sets rendering hint flags for the symbol.

See also: renderHints()

Definition at line 624 of file qgssymbol.h.

void QgsSymbolRenderContext::setSelected ( bool selected )

inline

Definition at line 612 of file qgssymbol.h.

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

/build/qgis-3.4.15+24xenial/src/core/symbology/qgssymbol.h
/build/qgis-3.4.15+24xenial/src/core/symbology/qgssymbol.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation