Quantum GIS API Documentation
1.7.5-Wroclaw
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A class that uses the PAL library for overlay object placement. More...
#include <qgspalobjectpositionmanager.h>
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. | |
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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. |
A class that uses the PAL library for overlay object placement.
Definition at line 29 of file qgspalobjectpositionmanager.h.
QgsPALObjectPositionManager::QgsPALObjectPositionManager | ( | ) |
Definition at line 30 of file qgspalobjectpositionmanager.cpp.
QgsPALObjectPositionManager::~QgsPALObjectPositionManager | ( | ) |
Definition at line 35 of file qgspalobjectpositionmanager.cpp.
References deletePALGeometries().
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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.
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private |
Definition at line 227 of file qgspalobjectpositionmanager.cpp.
References mPALGeometries.
Referenced by findObjectPositions(), and ~QgsPALObjectPositionManager().
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virtual |
Calculate positions for the overlay objects.
context | Context of rendering operation (Painter, scale factor) |
unitType | meters, feet, degrees |
Implements QgsOverlayObjectPositionManager.
Definition at line 100 of file qgspalobjectpositionmanager.cpp.
References QgsOverlayObject::addPosition(), QgsRenderContext::coordinateTransform(), QGis::Degrees, deletePALGeometries(), QgsRenderContext::extent(), QGis::Feet, QGis::Meters, mPositionEngine, QgsPALGeometry::overlayObjectPtr(), QgsRenderContext::rendererScale(), QgsRenderContext::scaleFactor(), QgsCoordinateTransform::transformBoundingBox(), QgsRectangle::xMaximum(), QgsRectangle::xMinimum(), QgsRectangle::yMaximum(), and QgsRectangle::yMinimum().
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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().
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private |
Definition at line 44 of file qgspalobjectpositionmanager.h.
Referenced by addLayer().
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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().
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private |
Definition at line 43 of file qgspalobjectpositionmanager.h.
Referenced by addLayer(), findObjectPositions(), removeLayers(), and setPlacementAlgorithm().