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Public Member Functions | Private Attributes | List of all members
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. More...
 
void label (const QgsPoint &p, QList< QgsLabelPosition * > &posList) const
 Returns label position(s) at a given point. More...
 
void labelsInRect (const QgsRectangle &r, QList< QgsLabelPosition * > &posList) const
 Returns label position(s) in given rectangle. More...
 
bool insertLabel (LabelPosition *labelPos, int featureId, const QString &layerName, const QString &labeltext, const QFont &labelfont, bool diagram=false, bool pinned=false)
 Inserts label position. More...
 

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 ~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 
) const

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 QgsLabelingResults::labelsAtPosition().

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

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 QgsLabelingResults::labelsWithinRect().

Member Data Documentation

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

Definition at line 62 of file qgslabelsearchtree.h.

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


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