pal::Problem Class Reference

Representation of a labeling problem. More...

#include <problem.h>

Public Member Functions
	Problem ()
	Problem (const Problem &other)=delete
	Problem cannot be copied. More...
	~Problem ()
void	addCandidatePosition (LabelPosition *position)
	Adds a candidate label position to the problem. More...
void	chain_search ()
	Test with very-large scale neighborhood. More...
LabelPosition *	getFeatureCandidate (int fi, int ci)
int	getFeatureCandidateCount (int i)
int	getNumFeatures ()
QList< LabelPosition * >	getSolution (bool returnInactive, QList< LabelPosition *> *unlabeled=nullptr)
	Solves the labeling problem, selecting the best candidate locations for all labels and returns a list of these calculated label positions. More...
PalStat *	getStats ()
void	init_sol_empty ()
	Basic initial solution : every feature to -1. More...
void	init_sol_falp ()
Problem &	operator= (const Problem &other)=delete
	Problem cannot be copied. More...
QList< LabelPosition * > *	positionsWithNoCandidates ()
	Returns a reference to the list of label positions which correspond to features with no candidates. More...
void	reduce ()

Static Public Member Functions
static bool	compareLabelArea (pal::LabelPosition *l1, pal::LabelPosition *l2)

Friends
class	Pal

Detailed Description

Representation of a labeling problem.

Note

not available in Python bindings

Definition at line 73 of file problem.h.

Constructor & Destructor Documentation

Problem() [1/2]

Problem::Problem

(

)

Definition at line 58 of file problem.cpp.

~Problem()

Problem::~Problem

(

)

Definition at line 68 of file problem.cpp.

Problem() [2/2]

pal::Problem::Problem ( const Problem &  other )

delete

Problem cannot be copied.

Member Function Documentation

addCandidatePosition()

void pal::Problem::addCandidatePosition ( LabelPosition *  position )

inline

Adds a candidate label position to the problem.

Parameters

position

label candidate position. Ownership is transferred to Problem.

Since

QGIS 2.12

Definition at line 95 of file problem.h.

chain_search()

void Problem::chain_search

(

)

Test with very-large scale neighborhood.

Definition at line 725 of file problem.cpp.

compareLabelArea()

bool Problem::compareLabelArea ( pal::LabelPosition *  l1, pal::LabelPosition *  l2  )

static

Definition at line 819 of file problem.cpp.

getFeatureCandidate()

LabelPosition* pal::Problem::getFeatureCandidate ( int  fi, int  ci  )

inline

Definition at line 103 of file problem.h.

getFeatureCandidateCount()

int pal::Problem::getFeatureCandidateCount ( int  i )

inline

Definition at line 101 of file problem.h.

getNumFeatures()

int pal::Problem::getNumFeatures ( )

inline

Definition at line 99 of file problem.h.

getSolution()

QList< LabelPosition * > Problem::getSolution	(	bool	returnInactive,
		QList< LabelPosition *> *	unlabeled = nullptr
	)

Solves the labeling problem, selecting the best candidate locations for all labels and returns a list of these calculated label positions.

If returnInactive is true, then the best positions for ALL labels will be returned, regardless of whether these labels overlap other labels.

If the optional unlabeled list is specified, it will be filled with a list of all feature labels which could not be placed in the returned solution (e.g. due to overlaps or other constraints).

Ownership of the returned labels is not transferred - it resides with the pal object.

Definition at line 824 of file problem.cpp.

getStats()

PalStat * Problem::getStats

(

)

Definition at line 860 of file problem.cpp.

init_sol_empty()

void Problem::init_sol_empty

(

)

Basic initial solution : every feature to -1.

Definition at line 157 of file problem.cpp.

init_sol_falp()

void Problem::init_sol_falp

(

)

Definition at line 240 of file problem.cpp.

operator=()

Problem& pal::Problem::operator= ( const Problem &  other )

delete

Problem cannot be copied.

positionsWithNoCandidates()

QList<LabelPosition *>* pal::Problem::positionsWithNoCandidates ( )

inline

Returns a reference to the list of label positions which correspond to features with no candidates.

Ownership of positions added to this list is transferred to the problem.

Definition at line 147 of file problem.h.

reduce()

void Problem::reduce

(

)

Definition at line 91 of file problem.cpp.

Friends And Related Function Documentation

Pal

friend class Pal

friend

Definition at line 76 of file problem.h.

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

• /build/qgis-3.10.0+15buster/src/core/pal/problem.h
• /build/qgis-3.10.0+15buster/src/core/pal/problem.cpp