QgsVectorSimplifyMethod Class Reference

This class contains information how to simplify geometries fetched from a vector layer. More...

#include <qgsvectorsimplifymethod.h>

Public Types
enum	SimplifyHint { NoSimplification = 0, GeometrySimplification = 1, AntialiasingSimplification = 2, FullSimplification = 3 }
	Simplification flags for fast rendering of features. More...

Public Member Functions
	QgsVectorSimplifyMethod ()
	construct a default object
	QgsVectorSimplifyMethod (const QgsVectorSimplifyMethod &rh)
	copy constructor
QgsVectorSimplifyMethod &	operator= (const QgsVectorSimplifyMethod &rh)
	assignment operator
void	setSimplifyHints (SimplifyHints simplifyHints)
	Sets the simplification hints of the vector layer managed.
SimplifyHints	simplifyHints () const
	Gets the simplification hints of the vector layer managed.
void	setThreshold (float threshold)
	Sets the simplification threshold of the vector layer managed.
float	threshold () const
	Gets the simplification threshold of the vector layer managed.
void	setForceLocalOptimization (bool localOptimization)
	Sets where the simplification executes, after fetch the geometries from provider, or when supported, in provider before fetch the geometries.
bool	forceLocalOptimization () const
	Gets where the simplification executes, after fetch the geometries from provider, or when supported, in provider before fetch the geometries.
void	setMaximumScale (float maximumScale)
	Sets the maximum scale at which the layer should be simplified.
float	maximumScale () const
	Gets the maximum scale at which the layer should be simplified.

Private Attributes
SimplifyHints	mSimplifyHints
	Simplification hints for fast rendering of features of the vector layer managed.
float	mThreshold
	Simplification threshold.
bool	mLocalOptimization
	Simplification executes after fetch the geometries from provider, otherwise it executes, when supported, in provider before fetch the geometries.
float	mMaximumScale
	Maximum scale at which the layer should be simplified (Maximum scale at which generalisation should be carried out)

Detailed Description

This class contains information how to simplify geometries fetched from a vector layer.

Note

added in 2.2

Definition at line 24 of file qgsvectorsimplifymethod.h.

Member Enumeration Documentation

enum QgsVectorSimplifyMethod::SimplifyHint

Simplification flags for fast rendering of features.

Enumerator:

NoSimplification	No simplification can be applied.
GeometrySimplification	The geometries can be simplified using the current map2pixel context state.
AntialiasingSimplification	The geometries can be rendered with 'AntiAliasing' disabled because of it is '1-pixel size'.
FullSimplification	All simplification hints can be applied ( Geometry + AA-disabling )

Definition at line 35 of file qgsvectorsimplifymethod.h.

Constructor & Destructor Documentation

QgsVectorSimplifyMethod::QgsVectorSimplifyMethod

(

)

construct a default object

Definition at line 20 of file qgsvectorsimplifymethod.cpp.

QgsVectorSimplifyMethod::QgsVectorSimplifyMethod

(

const QgsVectorSimplifyMethod &

rh

)

copy constructor

Definition at line 28 of file qgsvectorsimplifymethod.cpp.

References operator=().

Member Function Documentation

bool QgsVectorSimplifyMethod::forceLocalOptimization ( ) const

inline

Gets where the simplification executes, after fetch the geometries from provider, or when supported, in provider before fetch the geometries.

Definition at line 57 of file qgsvectorsimplifymethod.h.

Referenced by QgsVectorLayer::draw(), QgsVectorLayer::QgsVectorLayer(), and QgsVectorLayer::writeSymbology().

float QgsVectorSimplifyMethod::maximumScale ( ) const

inline

Gets the maximum scale at which the layer should be simplified.

Definition at line 62 of file qgsvectorsimplifymethod.h.

Referenced by QgsVectorLayer::QgsVectorLayer(), QgsVectorLayer::simplifyDrawingCanbeApplied(), and QgsVectorLayer::writeSymbology().

QgsVectorSimplifyMethod & QgsVectorSimplifyMethod::operator=

(

const QgsVectorSimplifyMethod &

rh

)

assignment operator

Definition at line 33 of file qgsvectorsimplifymethod.cpp.

References mLocalOptimization, mMaximumScale, mSimplifyHints, and mThreshold.

Referenced by QgsVectorSimplifyMethod().

void QgsVectorSimplifyMethod::setForceLocalOptimization ( bool  localOptimization )

inline

Sets where the simplification executes, after fetch the geometries from provider, or when supported, in provider before fetch the geometries.

Definition at line 55 of file qgsvectorsimplifymethod.h.

Referenced by QgsVectorLayer::QgsVectorLayer(), and QgsVectorLayer::readSymbology().

void QgsVectorSimplifyMethod::setMaximumScale ( float  maximumScale )

inline

Sets the maximum scale at which the layer should be simplified.

Definition at line 60 of file qgsvectorsimplifymethod.h.

Referenced by QgsVectorLayer::QgsVectorLayer(), and QgsVectorLayer::readSymbology().

void QgsVectorSimplifyMethod::setSimplifyHints ( SimplifyHints  simplifyHints )

inline

Sets the simplification hints of the vector layer managed.

Definition at line 45 of file qgsvectorsimplifymethod.h.

Referenced by QgsVectorLayer::QgsVectorLayer(), and QgsVectorLayer::readSymbology().

void QgsVectorSimplifyMethod::setThreshold ( float  threshold )

inline

Sets the simplification threshold of the vector layer managed.

Definition at line 50 of file qgsvectorsimplifymethod.h.

Referenced by QgsVectorLayer::QgsVectorLayer(), and QgsVectorLayer::readSymbology().

SimplifyHints QgsVectorSimplifyMethod::simplifyHints ( ) const

inline

Gets the simplification hints of the vector layer managed.

Definition at line 47 of file qgsvectorsimplifymethod.h.

Referenced by QgsVectorLayer::QgsVectorLayer(), QgsVectorLayer::simplifyDrawingCanbeApplied(), and QgsVectorLayer::writeSymbology().

float QgsVectorSimplifyMethod::threshold ( ) const

inline

Gets the simplification threshold of the vector layer managed.

Definition at line 52 of file qgsvectorsimplifymethod.h.

Referenced by QgsFillSymbolLayerV2::_renderPolygon(), QgsVectorLayer::draw(), QgsVectorLayer::QgsVectorLayer(), QgsSimpleLineSymbolLayerV2::renderPolyline(), and QgsVectorLayer::writeSymbology().

Member Data Documentation

bool QgsVectorSimplifyMethod::mLocalOptimization

private

Simplification executes after fetch the geometries from provider, otherwise it executes, when supported, in provider before fetch the geometries.

Definition at line 70 of file qgsvectorsimplifymethod.h.

Referenced by operator=().

float QgsVectorSimplifyMethod::mMaximumScale

private

Maximum scale at which the layer should be simplified (Maximum scale at which generalisation should be carried out)

Definition at line 72 of file qgsvectorsimplifymethod.h.

Referenced by operator=().

SimplifyHints QgsVectorSimplifyMethod::mSimplifyHints

private

Simplification hints for fast rendering of features of the vector layer managed.

Definition at line 66 of file qgsvectorsimplifymethod.h.

Referenced by operator=().

float QgsVectorSimplifyMethod::mThreshold

private

Simplification threshold.

Definition at line 68 of file qgsvectorsimplifymethod.h.

Referenced by operator=().

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

• /tmp/buildd/qgis-2.2.0+wheezy1/src/core/qgsvectorsimplifymethod.h
• /tmp/buildd/qgis-2.2.0+wheezy1/src/core/qgsvectorsimplifymethod.cpp