/** This class contains information how to simplify geometries fetched from a vector layer * @note added in 2.2 */ class QgsVectorSimplifyMethod { %TypeHeaderCode #include "qgsvectorsimplifymethod.h" %End public: //! construct a default object QgsVectorSimplifyMethod(); //! copy constructor QgsVectorSimplifyMethod( const QgsVectorSimplifyMethod& rh ); /** Simplification flags for fast rendering of features */ enum SimplifyHint { NoSimplification, //!< No simplification can be applied GeometrySimplification, //!< The geometries can be simplified using the current map2pixel context state AntialiasingSimplification, //!< The geometries can be rendered with 'AntiAliasing' disabled because of it is '1-pixel size' FullSimplification, //!< All simplification hints can be applied ( Geometry + AA-disabling ) }; typedef QFlags SimplifyHints; /** Sets the simplification hints of the vector layer managed */ void setSimplifyHints( const QFlags& simplifyHints ); /** Gets the simplification hints of the vector layer managed */ QFlags simplifyHints() const; /** Types of local simplification algorithms that can be used */ enum SimplifyAlgorithm { Distance = 0, //!< The simplification uses the distance between points to remove duplicate points SnapToGrid = 1, //!< The simplification uses a grid (similar to ST_SnapToGrid) to remove duplicate points Visvalingam = 2, //!< The simplification gives each point in a line an importance weighting, so that least important points are removed first }; /** Sets the local simplification algorithm of the vector layer managed */ void setSimplifyAlgorithm( const SimplifyAlgorithm& simplifyAlgorithm ); /** Gets the local simplification algorithm of the vector layer managed */ SimplifyAlgorithm simplifyAlgorithm() const; /** Sets the tolerance of simplification in map units. Represents the maximum distance in map units between two coordinates which can be considered equal */ void setTolerance( double tolerance ); /** Gets the tolerance of simplification in map units. Represents the maximum distance in map units between two coordinates which can be considered equal */ double tolerance() const; /** Sets the simplification threshold of the vector layer managed */ void setThreshold( float threshold ); /** Gets the simplification threshold of the vector layer managed */ float threshold() const; /** Sets where the simplification executes, after fetch the geometries from provider, or when supported, in provider before fetch the geometries */ void setForceLocalOptimization( bool localOptimization ); /** Gets where the simplification executes, after fetch the geometries from provider, or when supported, in provider before fetch the geometries */ bool forceLocalOptimization() const; /** Sets the maximum scale at which the layer should be simplified */ void setMaximumScale( float maximumScale ); /** Gets the maximum scale at which the layer should be simplified */ float maximumScale() const; }; QFlags operator|( QgsVectorSimplifyMethod::SimplifyHint f1, QFlags f2 );