QgsSimplifyMethod Class Reference

This class contains information about how to simplify geometries fetched from a QgsFeatureIterator. More...

#include <qgssimplifymethod.h>

Public Types
enum	MethodType { NoSimplification, OptimizeForRendering, PreserveTopology }

Public Member Functions
	QgsSimplifyMethod ()
	construct a default method
	QgsSimplifyMethod (const QgsSimplifyMethod &rh)
	copy constructor
QgsSimplifyMethod &	operator= (const QgsSimplifyMethod &rh)
	assignment operator
void	setMethodType (MethodType methodType)
	Sets the simplification type.
MethodType	methodType () const
	Gets the simplification type.
void	setTolerance (double tolerance)
	Sets the tolerance of simplification. Represents the maximum distance between two coordinates which can be considered equal.
double	tolerance () const
	Gets the tolerance of simplification.
void	setForceLocalOptimization (bool localOptimization)
	Sets whether the simplification executes after fetch the geometries from provider, otherwise it executes, when supported, in provider before fetch the geometries.
bool	forceLocalOptimization () const
	Gets whether the simplification executes after fetch the geometries from provider, otherwise it executes, when supported, in provider before fetch the geometries.

Static Public Member Functions
static QgsAbstractGeometrySimplifier *	createGeometrySimplifier (const QgsSimplifyMethod &simplifyMethod)
	Creates a geometry simplifier according to specified method.

Protected Attributes
MethodType	mMethodType
	Simplification method.
double	mTolerance
	Tolerance of simplification, it represents the maximum distance between two coordinates which can be considered equal.
bool	mForceLocalOptimization
	Simplification executes after fetch the geometries from provider, otherwise it executes, when supported, in provider before fetch the geometries.

Detailed Description

This class contains information about how to simplify geometries fetched from a QgsFeatureIterator.

Note

added in 2.2

Member Enumeration Documentation

enum QgsSimplifyMethod::MethodType

Enumerator:

NoSimplification	No simplification is applied.
OptimizeForRendering	Simplify using the map2pixel data to optimize the rendering of geometries.
PreserveTopology	Simplify using the Douglas-Peucker algorithm ensuring that the result is a valid geometry.

Constructor & Destructor Documentation

QgsSimplifyMethod::QgsSimplifyMethod

(

)

construct a default method

QgsSimplifyMethod::QgsSimplifyMethod

(

const QgsSimplifyMethod &

rh

)

copy constructor

Member Function Documentation

QgsAbstractGeometrySimplifier * QgsSimplifyMethod::createGeometrySimplifier ( const QgsSimplifyMethod &  simplifyMethod )

static

Creates a geometry simplifier according to specified method.

bool QgsSimplifyMethod::forceLocalOptimization ( ) const

inline

Gets whether the simplification executes after fetch the geometries from provider, otherwise it executes, when supported, in provider before fetch the geometries.

MethodType QgsSimplifyMethod::methodType ( ) const

inline

Gets the simplification type.

QgsSimplifyMethod & QgsSimplifyMethod::operator=

(

const QgsSimplifyMethod &

rh

)

assignment operator

void QgsSimplifyMethod::setForceLocalOptimization

(

bool

localOptimization

)

Sets whether the simplification executes after fetch the geometries from provider, otherwise it executes, when supported, in provider before fetch the geometries.

void QgsSimplifyMethod::setMethodType

(

MethodType

methodType

)

Sets the simplification type.

void QgsSimplifyMethod::setTolerance

(

double

tolerance

)

Sets the tolerance of simplification. Represents the maximum distance between two coordinates which can be considered equal.

double QgsSimplifyMethod::tolerance ( ) const

inline

Gets the tolerance of simplification.

Member Data Documentation

bool QgsSimplifyMethod::mForceLocalOptimization

protected

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

MethodType QgsSimplifyMethod::mMethodType

protected

Simplification method.

double QgsSimplifyMethod::mTolerance

protected

Tolerance of simplification, it represents the maximum distance between two coordinates which can be considered equal.

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

• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgssimplifymethod.h
• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgssimplifymethod.cpp