#include <qgspallabeling.h>

Inheritance diagram for QgsPalLabeling:

Collaboration diagram for QgsPalLabeling:

Public Types
enum	Search { Chain, Popmusic_Tabu, Popmusic_Chain, Popmusic_Tabu_Chain, Falp }

Public Member Functions
	QgsPalLabeling ()

	~QgsPalLabeling ()

QgsPalLayerSettings &	layer (const QString &layerName)

void	numCandidatePositions (int &candPoint, int &candLine, int &candPolygon)

void	setNumCandidatePositions (int candPoint, int candLine, int candPolygon)

void	setSearchMethod (Search s)

Search	searchMethod () const

bool	isShowingCandidates () const

void	setShowingCandidates (bool showing)

const QList< QgsLabelCandidate > &	candidates ()

bool	isShowingAllLabels () const

void	setShowingAllLabels (bool showing)

virtual void	init (QgsMapRenderer *mr)
	called when we're going to start with rendering More...

virtual bool	willUseLayer (QgsVectorLayer *layer)
	called to find out whether the layer is used for labeling More...

virtual int	prepareLayer (QgsVectorLayer *layer, QSet< int > &attrIndices, QgsRenderContext &ctx)
	hook called when drawing layer before issuing select() More...

virtual int	addDiagramLayer (QgsVectorLayer layer, QgsDiagramLayerSettings s)
	adds a diagram layer to the labeling engine More...

virtual void	registerFeature (QgsVectorLayer *layer, QgsFeature &feat, const QgsRenderContext &context=QgsRenderContext())
	hook called when drawing for every feature in a layer More...

virtual void	registerDiagramFeature (QgsVectorLayer *layer, QgsFeature &feat, const QgsRenderContext &context=QgsRenderContext())
	called for every diagram feature More...

virtual void	drawLabeling (QgsRenderContext &context)
	called when the map is drawn and labels should be placed More...

virtual void	exit ()
	called when we're done with rendering More...

virtual QList< QgsLabelPosition >	labelsAtPosition (const QgsPoint &p)
	return infos about labels at a given (map) position More...

virtual QgsLabelingEngineInterface *	clone ()
	called when passing engine among map renderers More...

void	drawLabelCandidateRect (pal::LabelPosition lp, QPainter painter, const QgsMapToPixel *xform)

void	drawLabel (pal::LabelPosition label, QPainter painter, const QFont &f, const QColor &c, const QgsMapToPixel *xform, double bufferSize=-1, const QColor &bufferColor=QColor(255, 255, 255), bool drawBuffer=false)
	drawLabel More...

Public Member Functions inherited from QgsLabelingEngineInterface
virtual	~QgsLabelingEngineInterface ()

Static Public Member Functions
static void	drawLabelBuffer (QPainter *p, QString text, const QFont &font, double size, QColor color)

Protected Member Functions
void	initPal ()

Protected Attributes
QHash< QgsVectorLayer *, QgsPalLayerSettings >	mActiveLayers

QHash< QgsVectorLayer *, QgsDiagramLayerSettings >	mActiveDiagramLayers

QgsPalLayerSettings	mInvalidLayerSettings

QgsMapRenderer *	mMapRenderer

int	mCandPoint

int	mCandLine

int	mCandPolygon

Search	mSearch

pal::Pal *	mPal

QList< QgsLabelCandidate >	mCandidates

bool	mShowingCandidates

bool	mShowingAllLabels

QgsLabelSearchTree *	mLabelSearchTree

Detailed Description

Definition at line 171 of file qgspallabeling.h.

Member Enumeration Documentation

enum QgsPalLabeling::Search

Enumerator
Chain
Popmusic_Tabu
Popmusic_Chain
Popmusic_Tabu_Chain
Falp

Definition at line 182 of file qgspallabeling.h.

Constructor & Destructor Documentation

QgsPalLabeling::QgsPalLabeling ( )

Definition at line 636 of file qgspallabeling.cpp.

References Chain, Falp, mCandLine, mCandPoint, mCandPolygon, mLabelSearchTree, mSearch, mShowingAllLabels, mShowingCandidates, Popmusic_Chain, Popmusic_Tabu, and Popmusic_Tabu_Chain.

Referenced by clone().

QgsPalLabeling::~QgsPalLabeling ( )

Definition at line 662 of file qgspallabeling.cpp.

References exit(), and mLabelSearchTree.

Member Function Documentation

int QgsPalLabeling::addDiagramLayer	(	QgsVectorLayer *	layer,
		QgsDiagramLayerSettings *	s
	)

virtual

adds a diagram layer to the labeling engine

Reimplemented from QgsLabelingEngineInterface.

Definition at line 764 of file qgspallabeling.cpp.

References QgsMapRenderer::coordinateTransform(), QgsMapLayer::crs(), QgsDiagramLayerSettings::ct, QgsMapRenderer::destinationCrs(), QgsMapRenderer::hasCrsTransformEnabled(), QgsMapLayer::id(), mActiveDiagramLayers, mMapRenderer, mPal, QgsDiagramLayerSettings::obstacle, QgsDiagramLayerSettings::palLayer, QgsDiagramLayerSettings::placement, QgsDiagramLayerSettings::placementFlags, QgsDiagramLayerSettings::priority, and QgsDiagramLayerSettings::xform.

const QList<QgsLabelCandidate>& QgsPalLabeling::candidates ( )

inline

Definition at line 189 of file qgspallabeling.h.

QgsLabelingEngineInterface * QgsPalLabeling::clone ( )

virtual

called when passing engine among map renderers

Implements QgsLabelingEngineInterface.

Definition at line 1288 of file qgspallabeling.cpp.

References mShowingAllLabels, mShowingCandidates, and QgsPalLabeling().

void QgsPalLabeling::drawLabel	(	pal::LabelPosition *	label,
		QPainter *	painter,
		const QFont &	f,
		const QColor &	c,
		const QgsMapToPixel *	xform,
		double	bufferSize = `-1`,
		const QColor &	bufferColor = `QColor( 255, 255, 255 )`,
		bool	drawBuffer = `false`
	)