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
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.
MethodType	methodType () const
	Gets the simplification type.
QgsSimplifyMethod &	operator= (const QgsSimplifyMethod &rh)
	assignment operator
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.
void	setMethodType (MethodType methodType)
	Sets 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.

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

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

Detailed Description

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

Note

added in 2.2

Definition at line 25 of file qgssimplifymethod.h.

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.

Definition at line 28 of file qgssimplifymethod.h.

Constructor & Destructor Documentation

QgsSimplifyMethod::QgsSimplifyMethod

(

)

construct a default method

Definition at line 21 of file qgssimplifymethod.cpp.

QgsSimplifyMethod::QgsSimplifyMethod

(

const QgsSimplifyMethod &

rh

)

copy constructor

Definition at line 28 of file qgssimplifymethod.cpp.

Member Function Documentation

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

static

Creates a geometry simplifier according to specified method.

Definition at line 57 of file qgssimplifymethod.cpp.

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.

Definition at line 55 of file qgssimplifymethod.h.

MethodType QgsSimplifyMethod::methodType ( ) const

inline

Gets the simplification type.

Definition at line 45 of file qgssimplifymethod.h.

QgsSimplifyMethod & QgsSimplifyMethod::operator=

(

const QgsSimplifyMethod &

rh

)

assignment operator

Definition at line 33 of file qgssimplifymethod.cpp.

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.

Definition at line 52 of file qgssimplifymethod.cpp.

void QgsSimplifyMethod::setMethodType

(

MethodType

methodType

)

Sets the simplification type.

Definition at line 42 of file qgssimplifymethod.cpp.

void QgsSimplifyMethod::setTolerance

(

double

tolerance

)

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

Definition at line 47 of file qgssimplifymethod.cpp.

double QgsSimplifyMethod::tolerance ( ) const

inline

Gets the tolerance of simplification.

Definition at line 50 of file qgssimplifymethod.h.

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.

Definition at line 66 of file qgssimplifymethod.h.

MethodType QgsSimplifyMethod::mMethodType

protected

Simplification method.

Definition at line 62 of file qgssimplifymethod.h.

double QgsSimplifyMethod::mTolerance

protected

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

Definition at line 64 of file qgssimplifymethod.h.

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

• /tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgssimplifymethod.h
• /tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgssimplifymethod.cpp