Quantum GIS API Documentation
1.7.5-Wroclaw
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This is the class is providing tolerance value in map unit values. More...
#include <qgstolerance.h>
Public Types | |
enum | UnitType { MapUnits, Pixels } |
Type of unit of tolerance value from settings. More... | |
Static Public Member Functions | |
static double | vertexSearchRadius (QgsMapLayer *layer, QgsMapRenderer *renderer) |
Static function to get vertex tolerance value for a layer. More... | |
static double | defaultTolerance (QgsMapLayer *layer, QgsMapRenderer *renderer) |
Static function to get default tolerance value for a layer. More... | |
static double | toleranceInMapUnits (double tolerance, QgsMapLayer *layer, QgsMapRenderer *renderer, UnitType units=MapUnits) |
Static function to translate tolerance value into current map unit value. More... | |
Static Private Member Functions | |
static double | computeMapUnitPerPixel (QgsMapLayer *layer, QgsMapRenderer *renderer) |
static QgsPoint | toLayerCoordinates (QgsMapLayer *layer, QgsMapRenderer *renderer, const QPoint &point) |
This is the class is providing tolerance value in map unit values.
Definition at line 28 of file qgstolerance.h.
Type of unit of tolerance value from settings.
Enumerator | |
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MapUnits |
Map unit value. |
Pixels |
Pixels unit of tolerance. |
Definition at line 33 of file qgstolerance.h.
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staticprivate |
Definition at line 50 of file qgstolerance.cpp.
References QgsMapRenderer::hasCrsTransformEnabled(), QgsMapRenderer::mapUnitsPerPixel(), QgsPoint::sqrDist(), and toLayerCoordinates().
Referenced by toleranceInMapUnits().
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Static function to get default tolerance value for a layer.
The value is read from settings and transformed if necessary.
Definition at line 41 of file qgstolerance.cpp.
References toleranceInMapUnits().
Referenced by QgsMapCanvasSnapper::snapToBackgroundLayers().
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staticprivate |
Definition at line 78 of file qgstolerance.cpp.
References QgsMapRenderer::coordinateTransform(), QgsMapRenderer::mapToLayerCoordinates(), and QgsMapToPixel::toMapCoordinates().
Referenced by computeMapUnitPerPixel().
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static |
Static function to translate tolerance value into current map unit value.
tolerance | tolerance value to be translated |
layer | reference layer |
renderer | renderer |
units | type of units to be translated |
Definition at line 21 of file qgstolerance.cpp.
References computeMapUnitPerPixel(), and MapUnits.
Referenced by defaultTolerance(), QgsSnapper::snapPoint(), and vertexSearchRadius().
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static |
Static function to get vertex tolerance value for a layer.
The value is read from settings and transformed if necessary.
Definition at line 32 of file qgstolerance.cpp.
References Pixels, and toleranceInMapUnits().
Referenced by QgsMapCanvasSnapper::snapToCurrentLayer().