46#include <unordered_map>
120 void removeLayer(
Layer *layer );
122 typedef bool ( *FnIsCanceled )(
void *ctx );
125 void registerCancellationCallback( FnIsCanceled fnCanceled,
void *context );
128 inline bool isCanceled() {
return fnIsCanceled ? fnIsCanceled( fnIsCanceledContext ) :
false; }
151 QList<LabelPosition *> solveProblem(
Problem *prob,
QgsRenderContext &context,
bool displayAll, QList<pal::LabelPosition *> *unlabeled =
nullptr );
158 void setShowPartialLabels(
bool show );
165 bool showPartialLabels()
const;
252 std::unordered_map< QgsAbstractLabelProvider *, std::unique_ptr< Layer > > mLayers;
264 int mEjChainDeg = 50;
266 double mCandListSize = 0.2;
268 unsigned int mNextCandidateId = 1;
269 mutable QHash< QPair< unsigned int, unsigned int >,
bool > mCandidateConflicts;
274 bool mShowPartialLabels =
true;
276 double mMaxLineCandidatesPerMapUnit = 0;
277 double mMaxPolygonCandidatesPerMapUnitSquared = 0;
279 int mGlobalCandidatesLimitPoint = 0;
280 int mGlobalCandidatesLimitLine = 0;
281 int mGlobalCandidatesLimitPolygon = 0;
286 FnIsCanceled fnIsCanceled =
nullptr;
288 void *fnIsCanceledContext =
nullptr;
294 void setPopmusicR(
int r );
300 void setMinIt(
int min_it );
306 void setMaxIt(
int max_it );
312 void setTenure(
int tenure );
318 void setEjChainDeg(
int degree );
324 void setCandListSize(
double fact );
331 int getMinIt()
const;
337 int getMaxIt()
const;
LabelPlacement
Placement modes which determine how label candidates are generated for a feature.
LabelPlacementEngineVersion
Labeling placement engine version.
@ Version2
Version 2 (default for new projects since QGIS 3.12)
The QgsAbstractLabelProvider class is an interface class.
A geometry is the spatial representation of a feature.
A rectangle specified with double values.
Contains information about the context of a rendering operation.
An integer settings entry.
QgsSettingsTreeNode is a tree node for the settings tree to help organizing and introspecting the tre...
QgsSettingsTreeNode * createChildNode(const QString &key)
Creates a normal tree node It will return the existing child node if it exists at the given key.
static QgsSettingsTreeNode * sTreeRendering
Main class to handle feature.
LabelPosition is a candidate feature label position.
A set of features which influence the labeling process.
double maximumLineCandidatesPerMapUnit() const
Returns the maximum number of line label candidate positions per map unit.
int globalCandidatesLimitPoint() const
Returns the global candidates limit for point features, or 0 if no global limit is in effect.
double maximumPolygonCandidatesPerMapUnitSquared() const
Returns the maximum number of polygon label candidate positions per map unit squared.
void setMaximumPolygonCandidatesPerMapUnitSquared(double candidates)
Sets the maximum number of polygon label candidates per map unit squared.
int globalCandidatesLimitLine() const
Returns the global candidates limit for line features, or 0 if no global limit is in effect.
static const QgsSettingsEntryInteger * settingsRenderingLabelCandidatesLimitLines
static const QgsSettingsEntryInteger * settingsRenderingLabelCandidatesLimitPoints
static const QgsSettingsEntryInteger * settingsRenderingLabelCandidatesLimitPolygons
void setMaximumLineCandidatesPerMapUnit(double candidates)
Sets the maximum number of line label candidates per map unit.
bool isCanceled()
Check whether the job has been canceled.
Pal(const Pal &other)=delete
int globalCandidatesLimitPolygon() const
Returns the global candidates limit for polygon features, or 0 if no global limit is in effect.
Pal & operator=(const Pal &other)=delete
Representation of a labeling problem.
SearchMethod
Search method to use.
@ FALP
Only initial solution.
@ POPMUSIC_TABU
Is a little bit better than CHAIN but slower.
@ POPMUSIC_CHAIN
Is slower and best than TABU, worse and faster than TABU_CHAIN.
@ CHAIN
Is the worst but fastest method.
@ POPMUSIC_TABU_CHAIN
Is the best but slowest.