QGIS API Documentation
3.0.2-Girona (307d082)
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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 ()=default | |
construct a default method More... | |
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. More... | |
MethodType | methodType () const |
Gets the simplification type. More... | |
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. More... | |
void | setMethodType (MethodType methodType) |
Sets the simplification type. More... | |
void | setThreshold (float threshold) |
Sets the simplification threshold in pixels. Represents the maximum distance in pixels between two coordinates which can be considered equal. More... | |
void | setTolerance (double tolerance) |
Sets the tolerance of simplification in map units. Represents the maximum distance in map units between two coordinates which can be considered equal. More... | |
float | threshold () const |
Gets the simplification threshold in pixels. Represents the maximum distance in pixels between two coordinates which can be considered equal. More... | |
double | tolerance () const |
Gets the tolerance of simplification in map units. Represents the maximum distance in map units between two coordinates which can be considered equal. More... | |
Static Public Member Functions | |
static QgsAbstractGeometrySimplifier * | createGeometrySimplifier (const QgsSimplifyMethod &simplifyMethod) |
Creates a geometry simplifier according to specified method. More... | |
Protected Attributes | |
bool | mForceLocalOptimization = true |
Simplification executes after fetch the geometries from provider, otherwise it executes, when supported, in provider before fetch the geometries. More... | |
MethodType | mMethodType = QgsSimplifyMethod::NoSimplification |
Simplification method. More... | |
float | mThreshold = 1 |
Simplification threshold. More... | |
double | mTolerance = 1 |
Simplification tolerance, it represents the maximum distance between two coordinates which can be considered equal. More... | |
This class contains information about how to simplify geometries fetched from a QgsFeatureIterator.
Definition at line 28 of file qgssimplifymethod.h.
Definition at line 31 of file qgssimplifymethod.h.
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default |
construct a default method
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Creates a geometry simplifier according to specified method.
Definition at line 37 of file qgssimplifymethod.cpp.
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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 59 of file qgssimplifymethod.h.
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Gets the simplification type.
Definition at line 44 of file qgssimplifymethod.h.
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 32 of file qgssimplifymethod.cpp.
void QgsSimplifyMethod::setMethodType | ( | MethodType | methodType | ) |
Sets the simplification type.
Definition at line 22 of file qgssimplifymethod.cpp.
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Sets the simplification threshold in pixels. Represents the maximum distance in pixels between two coordinates which can be considered equal.
Definition at line 52 of file qgssimplifymethod.h.
void QgsSimplifyMethod::setTolerance | ( | double | tolerance | ) |
Sets the tolerance of simplification in map units. Represents the maximum distance in map units between two coordinates which can be considered equal.
Definition at line 27 of file qgssimplifymethod.cpp.
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inline |
Gets the simplification threshold in pixels. Represents the maximum distance in pixels between two coordinates which can be considered equal.
Definition at line 54 of file qgssimplifymethod.h.
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inline |
Gets the tolerance of simplification in map units. Represents the maximum distance in map units between two coordinates which can be considered equal.
Definition at line 49 of file qgssimplifymethod.h.
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protected |
Simplification executes after fetch the geometries from provider, otherwise it executes, when supported, in provider before fetch the geometries.
Definition at line 72 of file qgssimplifymethod.h.
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Simplification method.
Definition at line 66 of file qgssimplifymethod.h.
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Simplification threshold.
Definition at line 70 of file qgssimplifymethod.h.
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Simplification tolerance, it represents the maximum distance between two coordinates which can be considered equal.
Definition at line 68 of file qgssimplifymethod.h.