QgsLabelSearchTree Class Reference

A class to query the labeling structure at a given point (small wraper around pal RTree class) More...

#include <qgslabelsearchtree.h>

Public Member Functions
	QgsLabelSearchTree ()
	~QgsLabelSearchTree ()
void	clear ()
	Removes and deletes all the entries.
void	label (const QgsPoint &p, QList< QgsLabelPosition * > &posList)
	Returns label position(s) at a given point.
void	labelsInRect (const QgsRectangle &r, QList< QgsLabelPosition * > &posList)
	Returns label position(s) in given rectangle.
bool	insertLabel (LabelPosition *labelPos, int featureId, const QString &layerName, const QString &labeltext, const QFont &labelfont, bool diagram=false, bool pinned=false)
	Inserts label position.

Private Attributes
RTree< QgsLabelPosition *, double, 2, double >	mSpatialIndex

Detailed Description

A class to query the labeling structure at a given point (small wraper around pal RTree class)

Definition at line 33 of file qgslabelsearchtree.h.

Constructor & Destructor Documentation

QgsLabelSearchTree::QgsLabelSearchTree

(

)

Definition at line 25 of file qgslabelsearchtree.cpp.

QgsLabelSearchTree::~QgsLabelSearchTree

(

)

Definition at line 29 of file qgslabelsearchtree.cpp.

References clear().

Member Function Documentation

void QgsLabelSearchTree::clear

(

)

Removes and deletes all the entries.

Definition at line 92 of file qgslabelsearchtree.cpp.

References mSpatialIndex.

Referenced by QgsPalLabeling::drawLabeling(), and ~QgsLabelSearchTree().

bool QgsLabelSearchTree::insertLabel	(	LabelPosition *	labelPos,
		int	featureId,
		const QString &	layerName,
		const QString &	labeltext,
		const QFont &	labelfont,
		bool	diagram = false,
		bool	pinned = false
	)

Inserts label position.

Does not take ownership of labelPos

Returns

true in case of success

Note

not available in python bindings

Definition at line 70 of file qgslabelsearchtree.cpp.

References mSpatialIndex.

Referenced by QgsPalLabeling::drawLabeling().

void QgsLabelSearchTree::label	(	const QgsPoint &	p,
		QList< QgsLabelPosition * > &	posList
	)

Returns label position(s) at a given point.

QgsLabelSearchTree keeps ownership, don't delete the LabelPositions

Note

not available in python bindings TODO: why does this break bindings with QList<QgsLabelPosition>?

Definition at line 34 of file qgslabelsearchtree.cpp.

References mSpatialIndex, searchCallback(), QgsPoint::x(), and QgsPoint::y().

Referenced by QgsPalLabeling::labelsAtPosition().

void QgsLabelSearchTree::labelsInRect	(	const QgsRectangle &	r,
		QList< QgsLabelPosition * > &	posList
	)

Returns label position(s) in given rectangle.

QgsLabelSearchTree keeps ownership, don't delete the LabelPositions

Note

not available in python bindings TODO: why does this break bindings with QList<QgsLabelPosition>?

Definition at line 54 of file qgslabelsearchtree.cpp.

References mSpatialIndex, searchCallback(), QgsRectangle::xMaximum(), QgsRectangle::xMinimum(), QgsRectangle::yMaximum(), and QgsRectangle::yMinimum().

Referenced by QgsPalLabeling::labelsWithinRect().

Member Data Documentation

RTree<QgsLabelPosition*, double, 2, double> QgsLabelSearchTree::mSpatialIndex

private

Definition at line 61 of file qgslabelsearchtree.h.

Referenced by clear(), insertLabel(), label(), and labelsInRect().

---

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

• /tmp/buildd/qgis-2.2.0+wheezy1/src/core/qgslabelsearchtree.h
• /tmp/buildd/qgis-2.2.0+wheezy1/src/core/qgslabelsearchtree.cpp