Base class for paint effects which offset, blurred shadows. More...

#include <qgsshadoweffect.h>

Inheritance diagram for QgsShadowEffect:

Public Member Functions
	QgsShadowEffect ()

virtual	~QgsShadowEffect ()

QPainter::CompositionMode	blendMode () const
	Returns the blend mode for the effect. More...

int	blurLevel () const
	Returns the blur level (strength) for the shadow. More...

QColor	color () const
	Returns the color used for the shadow. More...

int	offsetAngle () const
	Returns the angle used for offsetting the shadow. More...

double	offsetDistance () const
	Returns the distance used for offsetting the shadow. More...

const QgsMapUnitScale &	offsetMapUnitScale () const
	Returns the map unit scale used for the shadow offset distance. More...

QgsSymbolV2::OutputUnit	offsetUnit () const
	Returns the units used for the shadow offset distance. More...

virtual QgsStringMap	properties () const override
	Returns the properties describing the paint effect encoded in a string format. More...

virtual void	readProperties (const QgsStringMap &props) override
	Reads a string map of an effect's properties and restores the effect to the state described by the properties map. More...

void	setBlendMode (const QPainter::CompositionMode mode)
	Sets the blend mode for the effect. More...

void	setBlurLevel (const int level)
	Sets blur level (strength) for the shadow. More...

void	setColor (const QColor &color)
	Sets the color for the shadow. More...

void	setOffsetAngle (const int angle)
	Sets the angle for offsetting the shadow. More...

void	setOffsetDistance (const double distance)
	Sets the distance for offsetting the shadow. More...

void	setOffsetMapUnitScale (const QgsMapUnitScale &scale)
	Sets the map unit scale used for the shadow offset distance. More...

void	setOffsetUnit (const QgsSymbolV2::OutputUnit unit)
	Sets the units used for the shadow offset distance. More...

void	setTransparency (const double transparency)
	Sets the transparency for the effect. More...

double	transparency () const
	Returns the transparency for the effect. More...

Public Member Functions inherited from QgsPaintEffect
	QgsPaintEffect ()

	QgsPaintEffect (const QgsPaintEffect &other)

virtual	~QgsPaintEffect ()

virtual void	begin (QgsRenderContext &context)
	Begins intercepting paint operations to a render context. More...

virtual QgsPaintEffect *	clone () const =0
	Duplicates an effect by creating a deep copy of the effect. More...

DrawMode	drawMode () const
	Returns the draw mode for the effect. More...

bool	enabled () const
	Returns whether the effect is enabled. More...

virtual void	end (QgsRenderContext &context)
	Ends interception of paint operations to a render context, and draws the result to the render context after being modified by the effect. More...

virtual bool	readProperties (const QDomElement &element)
	Restores the effect to the state described by a DOM element. More...

virtual void	render (QPicture &picture, QgsRenderContext &context)
	Renders a picture using the effect. More...

virtual bool	saveProperties (QDomDocument &doc, QDomElement &element) const
	Saves the current state of the effect to a DOM element. More...

void	setDrawMode (const DrawMode drawMode)
	Sets the draw mode for the effect. More...

void	setEnabled (const bool enabled)
	Sets whether the effect is enabled. More...

virtual QString	type () const =0
	Returns the effect type. More...

Protected Member Functions
virtual QRectF	boundingRect (const QRectF &rect, const QgsRenderContext &context) const override
	Returns the bounding rect required for drawing the effect. More...

virtual void	draw (QgsRenderContext &context) override
	Handles drawing of the effect's result on to the specified render context. More...

virtual bool	exteriorShadow () const =0
	Specifies whether the shadow is drawn outside the picture or within the picture. More...

Protected Member Functions inherited from QgsPaintEffect
void	drawSource (QPainter &painter)
	Draws the source QPicture onto the specified painter. More...

void	fixQPictureDpi (QPainter *painter) const
	Applies a workaround to a QPainter to avoid an issue with incorrect scaling when drawing QPictures. More...

QPointF	imageOffset (const QgsRenderContext &context) const
	Returns the offset which should be used when drawing the source image on to a destination render context. More...

const QPicture *	source () const
	Returns the source QPicture. More...

QImage *	sourceAsImage (QgsRenderContext &context)
	Returns the source QPicture rendered to a new QImage. More...

Protected Attributes
QPainter::CompositionMode	mBlendMode

int	mBlurLevel

QColor	mColor

int	mOffsetAngle

double	mOffsetDist

QgsMapUnitScale	mOffsetMapUnitScale

QgsSymbolV2::OutputUnit	mOffsetUnit

double	mTransparency

Protected Attributes inherited from QgsPaintEffect
DrawMode	mDrawMode

bool	mEnabled

bool	requiresQPainterDpiFix

Additional Inherited Members
Public Types inherited from QgsPaintEffect
enum	DrawMode { Modifier, Render, ModifyAndRender }
	Drawing modes for effects. More...

Detailed Description

Base class for paint effects which offset, blurred shadows.

Note: Added in version 2.9

Definition at line 32 of file qgsshadoweffect.h.

Constructor & Destructor Documentation

◆ QgsShadowEffect()

QgsShadowEffect::QgsShadowEffect ( )

Definition at line 23 of file qgsshadoweffect.cpp.

◆ ~QgsShadowEffect()

QgsShadowEffect::~QgsShadowEffect ( )

virtual

Definition at line 36 of file qgsshadoweffect.cpp.

Member Function Documentation

◆ blendMode()

QPainter::CompositionMode QgsShadowEffect::blendMode ( ) const

inline

Returns the blend mode for the effect.

Returns: blend mode used for drawing the effect on to a destination paint device

See also: setBlendMode

Definition at line 157 of file qgsshadoweffect.h.

◆ blurLevel()

int QgsShadowEffect::blurLevel ( ) const

inline

Returns the blur level (strength) for the shadow.

Returns: blur level. Value will be between 0 and 16, with larger values indicating greater blur strength.

See also: setBlurLevel

Definition at line 55 of file qgsshadoweffect.h.

◆ boundingRect()

QRectF QgsShadowEffect::boundingRect	(	const QRectF &	rect,
		const QgsRenderContext &	context
	)		const

overrideprotectedvirtual

Returns the bounding rect required for drawing the effect.

This method can be used to expand the bounding rect of a source picture to account for offset or blurring effects.

Parameters

rect	original source bounding rect
context	destination render context

Returns: modified bounding rect

See also: sourceAsImage

Reimplemented from QgsPaintEffect.

Definition at line 150 of file qgsshadoweffect.cpp.

◆ color()

QColor QgsShadowEffect::color ( ) const

inline

Returns the color used for the shadow.

Returns: shadow color

See also: setColor

Definition at line 129 of file qgsshadoweffect.h.

◆ draw()

void QgsShadowEffect::draw ( QgsRenderContext & context )

overrideprotectedvirtual

Handles drawing of the effect's result on to the specified render context.

Derived classes must reimplement this method to apply any transformations to the source QPicture and draw the result using the context's painter.

Parameters

context destination render context

See also: drawSource

Implements QgsPaintEffect.

Definition at line 41 of file qgsshadoweffect.cpp.

◆ exteriorShadow()

virtual bool QgsShadowEffect::exteriorShadow ( ) const

protectedpure virtual

Specifies whether the shadow is drawn outside the picture or within the picture.

Returns: true if shadow is to be drawn outside the picture, or false to draw shadow within the picture

Implemented in QgsInnerShadowEffect, and QgsDropShadowEffect.

◆ offsetAngle()

int QgsShadowEffect::offsetAngle ( ) const

inline

Returns the angle used for offsetting the shadow.

Returns: offset angle in degrees clockwise from North

See also: setOffsetAngle; offsetDistance

Definition at line 69 of file qgsshadoweffect.h.

◆ offsetDistance()

double QgsShadowEffect::offsetDistance ( ) const

inline

Returns the distance used for offsetting the shadow.

Returns: offset distance. Distance units are retrieved via offsetUnit

See also: setOffsetDistance; offsetUnit; offsetMapUnitScale

Definition at line 85 of file qgsshadoweffect.h.

◆ offsetMapUnitScale()

const QgsMapUnitScale& QgsShadowEffect::offsetMapUnitScale ( ) const

inline

Returns the map unit scale used for the shadow offset distance.

Returns: map unit scale for offset distance

See also: setOffsetMapUnitScale; offsetDistance; offsetUnit

Definition at line 117 of file qgsshadoweffect.h.

◆ offsetUnit()

QgsSymbolV2::OutputUnit QgsShadowEffect::offsetUnit ( ) const

inline

Returns the units used for the shadow offset distance.

Returns: units for offset distance

See also: setOffsetUnit; offsetDistance; offsetMapUnitScale

Definition at line 101 of file qgsshadoweffect.h.

◆ properties()

QgsStringMap QgsShadowEffect::properties ( ) const

overridevirtual

Returns the properties describing the paint effect encoded in a string format.

Returns: string map of properties, in the form property key, value

See also: readProperties; saveProperties

Implements QgsPaintEffect.

Definition at line 96 of file qgsshadoweffect.cpp.

◆ readProperties()

void QgsShadowEffect::readProperties ( const QgsStringMap & props )

overridevirtual

Reads a string map of an effect's properties and restores the effect to the state described by the properties map.

Parameters

props effect properties encoded in a string map

See also: properties

Implements QgsPaintEffect.

Definition at line 112 of file qgsshadoweffect.cpp.

◆ setBlendMode()

void QgsShadowEffect::setBlendMode ( const QPainter::CompositionMode mode )

inline

Sets the blend mode for the effect.

Parameters

mode	blend mode used for drawing the effect on to a destination paint device

See also: blendMode

Definition at line 150 of file qgsshadoweffect.h.

◆ setBlurLevel()

void QgsShadowEffect::setBlurLevel ( const int level )

inline

Sets blur level (strength) for the shadow.

Parameters

level blur level. Values between 0 and 16 are valid, with larger values indicating greater blur strength.

See also: blurLevel

Definition at line 48 of file qgsshadoweffect.h.

◆ setColor()

void QgsShadowEffect::setColor ( const QColor & color )

inline

Sets the color for the shadow.

Parameters

color shadow color

See also: color

Definition at line 123 of file qgsshadoweffect.h.

◆ setOffsetAngle()

void QgsShadowEffect::setOffsetAngle ( const int angle )

inline

Sets the angle for offsetting the shadow.

Parameters

angle offset angle in degrees clockwise from North

See also: offsetAngle; setOffsetDistance

Definition at line 62 of file qgsshadoweffect.h.

◆ setOffsetDistance()

void QgsShadowEffect::setOffsetDistance ( const double distance )

inline

Sets the distance for offsetting the shadow.

Parameters

distance offset distance. Units are specified via setOffsetUnit

See also: offsetDistance; setOffsetUnit; setOffsetMapUnitScale

Definition at line 77 of file qgsshadoweffect.h.

◆ setOffsetMapUnitScale()

void QgsShadowEffect::setOffsetMapUnitScale ( const QgsMapUnitScale & scale )

inline

Sets the map unit scale used for the shadow offset distance.

Parameters

scale map unit scale for offset distance

See also: offsetMapUnitScale; setOffsetDistance; setOffsetUnit

Definition at line 109 of file qgsshadoweffect.h.

◆ setOffsetUnit()

void QgsShadowEffect::setOffsetUnit ( const QgsSymbolV2::OutputUnit unit )

inline

Sets the units used for the shadow offset distance.

Parameters

unit	units for offset distance

See also: offsetUnit; setOffsetDistance; setOffsetMapUnitScale

Definition at line 93 of file qgsshadoweffect.h.

◆ setTransparency()

void QgsShadowEffect::setTransparency ( const double transparency )

inline

Sets the transparency for the effect.

Parameters

transparency double between 0 and 1 inclusive, where 0 is fully opaque and 1 is fully transparent

See also: transparency

Definition at line 136 of file qgsshadoweffect.h.

◆ transparency()

double QgsShadowEffect::transparency ( ) const

inline

Returns the transparency for the effect.

Returns: transparency value between 0 and 1 inclusive, where 0 is fully opaque and 1 is fully transparent

See also: setTransparency

Definition at line 143 of file qgsshadoweffect.h.

Member Data Documentation

◆ mBlendMode

QPainter::CompositionMode QgsShadowEffect::mBlendMode

protected

Definition at line 178 of file qgsshadoweffect.h.

◆ mBlurLevel

int QgsShadowEffect::mBlurLevel

protected

Definition at line 171 of file qgsshadoweffect.h.

◆ mColor

QColor QgsShadowEffect::mColor

protected

Definition at line 177 of file qgsshadoweffect.h.

◆ mOffsetAngle

int QgsShadowEffect::mOffsetAngle

protected

Definition at line 172 of file qgsshadoweffect.h.

◆ mOffsetDist

double QgsShadowEffect::mOffsetDist

protected

Definition at line 173 of file qgsshadoweffect.h.

◆ mOffsetMapUnitScale

QgsMapUnitScale QgsShadowEffect::mOffsetMapUnitScale

protected

Definition at line 175 of file qgsshadoweffect.h.

◆ mOffsetUnit

QgsSymbolV2::OutputUnit QgsShadowEffect::mOffsetUnit

protected

Definition at line 174 of file qgsshadoweffect.h.

◆ mTransparency

double QgsShadowEffect::mTransparency

protected

Definition at line 176 of file qgsshadoweffect.h.

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

/tmp/buildd/qgis-2.18.21+99unstable/src/core/effects/qgsshadoweffect.h
/tmp/buildd/qgis-2.18.21+99unstable/src/core/effects/qgsshadoweffect.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsShadowEffect()

◆ ~QgsShadowEffect()

Member Function Documentation

◆ blendMode()

◆ blurLevel()

◆ boundingRect()

◆ color()

◆ draw()

◆ exteriorShadow()

◆ offsetAngle()

◆ offsetDistance()

◆ offsetMapUnitScale()

◆ offsetUnit()

◆ properties()

◆ readProperties()

◆ setBlendMode()

◆ setBlurLevel()

◆ setColor()

◆ setOffsetAngle()

◆ setOffsetDistance()

◆ setOffsetMapUnitScale()

◆ setOffsetUnit()

◆ setTransparency()

◆ transparency()

Member Data Documentation

◆ mBlendMode

◆ mBlurLevel

◆ mColor

◆ mOffsetAngle

◆ mOffsetDist

◆ mOffsetMapUnitScale

◆ mOffsetUnit

◆ mTransparency