Quantum GIS API Documentation  1.7.5-Wroclaw
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Public Member Functions | Private Member Functions | Private Attributes
QgsPALObjectPositionManager Class Reference

A class that uses the PAL library for overlay object placement. More...

#include <qgspalobjectpositionmanager.h>

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List of all members.

Public Member Functions

 QgsPALObjectPositionManager ()
 ~QgsPALObjectPositionManager ()
void addLayer (QgsVectorLayer *vl, QList< QgsVectorOverlay * > &overlays)
 Adds a layer that may contain * overlays to the position manager.
void findObjectPositions (const QgsRenderContext &renderContext, QGis::UnitType unitType)
 Calculate positions for the overlay objects.
void removeLayers ()
 Removes all the layers.
void setPlacementAlgorithm (const QString &algorithmName)
 Sets algorithm used for object placements.
- Public Member Functions inherited from QgsOverlayObjectPositionManager
virtual ~QgsOverlayObjectPositionManager ()

Private Member Functions

void deletePALGeometries ()

Private Attributes

pal::Pal mPositionEngine
int mNumberOfLayers
QList< QgsPALGeometry * > mPALGeometries
 Internal storage of the pal geometries between addLayer and findObjectPositions operations.

Detailed Description

A class that uses the PAL library for overlay object placement.

Note:
This class has been added in version 1.1

Definition at line 29 of file qgspalobjectpositionmanager.h.


Constructor & Destructor Documentation

QgsPALObjectPositionManager::QgsPALObjectPositionManager ( )

Definition at line 30 of file qgspalobjectpositionmanager.cpp.

QgsPALObjectPositionManager::~QgsPALObjectPositionManager ( )

Definition at line 35 of file qgspalobjectpositionmanager.cpp.

References deletePALGeometries().


Member Function Documentation

void QgsPALObjectPositionManager::addLayer ( QgsVectorLayer vl,
QList< QgsVectorOverlay * > &  overlays 
)
virtual

Adds a layer that may contain * overlays to the position manager.

The overlay objects contained in the overlays will then be considered in label placement

Implements QgsOverlayObjectPositionManager.

Definition at line 40 of file qgspalobjectpositionmanager.cpp.

References QgsVectorLayer::geometryType(), QGis::Line, mNumberOfLayers, mPALGeometries, mPositionEngine, QGis::Point, and QGis::Polygon.

void QgsPALObjectPositionManager::deletePALGeometries ( )
private

Definition at line 227 of file qgspalobjectpositionmanager.cpp.

References mPALGeometries.

Referenced by findObjectPositions(), and ~QgsPALObjectPositionManager().

void QgsPALObjectPositionManager::findObjectPositions ( const QgsRenderContext context,
QGis::UnitType  unitType 
)
virtual
void QgsPALObjectPositionManager::removeLayers ( )
virtual

Removes all the layers.

Implements QgsOverlayObjectPositionManager.

Definition at line 183 of file qgspalobjectpositionmanager.cpp.

References mPositionEngine.

void QgsPALObjectPositionManager::setPlacementAlgorithm ( const QString &  algorithmName)

Sets algorithm used for object placements.

Possibilities are: Chain, Popmusic tabu chain, Popmusic tabu, Popmusic chain

Definition at line 207 of file qgspalobjectpositionmanager.cpp.

References mPositionEngine.

Referenced by QgsMapRenderer::overlayManagerFromSettings().


Member Data Documentation

int QgsPALObjectPositionManager::mNumberOfLayers
private

Definition at line 44 of file qgspalobjectpositionmanager.h.

Referenced by addLayer().

QList<QgsPALGeometry*> QgsPALObjectPositionManager::mPALGeometries
private

Internal storage of the pal geometries between addLayer and findObjectPositions operations.

Definition at line 46 of file qgspalobjectpositionmanager.h.

Referenced by addLayer(), and deletePALGeometries().

pal::Pal QgsPALObjectPositionManager::mPositionEngine
private

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