QgsVectorLayerEditUtils Class Reference

#include <qgsvectorlayereditutils.h>

Public Member Functions
	QgsVectorLayerEditUtils (QgsVectorLayer *layer)
QgsGeometryCache *	cache ()
bool	insertVertex (double x, double y, QgsFeatureId atFeatureId, int beforeVertex)
	Insert a new vertex before the given vertex number, in the given ring, item (first number is index 0), and feature Not meaningful for Point geometries.
bool	moveVertex (double x, double y, QgsFeatureId atFeatureId, int atVertex)
	Moves the vertex at the given position number, ring and item (first number is index 0), and feature to the given coordinates.
bool	deleteVertex (QgsFeatureId atFeatureId, int atVertex)
	Deletes a vertex from a feature.
int	addRing (const QList< QgsPoint > &ring)
	Adds a ring to polygon/multipolygon features.
int	addPart (const QList< QgsPoint > &ring, QgsFeatureId featureId)
	Adds a new part polygon to a multipart feature.
int	translateFeature (QgsFeatureId featureId, double dx, double dy)
	Translates feature by dx, dy.
int	splitParts (const QList< QgsPoint > &splitLine, bool topologicalEditing=false)
	Splits parts cut by the given line.
int	splitFeatures (const QList< QgsPoint > &splitLine, bool topologicalEditing=false)
	Splits features cut by the given line.
int	addTopologicalPoints (QgsGeometry *geom)
	Adds topological points for every vertex of the geometry.
int	addTopologicalPoints (const QgsPoint &p)
	Adds a vertex to segments which intersect point p but don't already have a vertex there.
int	insertSegmentVerticesForSnap (const QList< QgsSnappingResult > &snapResults)
	Inserts vertices to the snapped segments.

Protected Member Functions
int	boundingBoxFromPointList (const QList< QgsPoint > &list, double &xmin, double &ymin, double &xmax, double &ymax) const
	Little helper function that gives bounding box from a list of points.

Protected Attributes
QgsVectorLayer *	L

Constructor & Destructor Documentation

QgsVectorLayerEditUtils::QgsVectorLayerEditUtils

(

QgsVectorLayer *

layer

)

Member Function Documentation

int QgsVectorLayerEditUtils::addPart	(	const QList< QgsPoint > &	ring,
		QgsFeatureId	featureId
	)

Adds a new part polygon to a multipart feature.

Returns

0 in case of success, 1 if selected feature is not multipart, 2 if ring is not a valid geometry, 3 if new polygon ring not disjoint with existing rings, 4 if no feature was selected, 5 if several features are selected, 6 if selected geometry not found

int QgsVectorLayerEditUtils::addRing

(

const QList< QgsPoint > &

ring

)

Adds a ring to polygon/multipolygon features.

Returns

0 in case of success, 1 problem with feature type, 2 ring not closed, 3 ring not valid, 4 ring crosses existing rings, 5 no feature found where ring can be inserted

int QgsVectorLayerEditUtils::addTopologicalPoints

(

QgsGeometry *

geom

)

Adds topological points for every vertex of the geometry.

Parameters

geom	the geometry where each vertex is added to segments of other features

Note

geom is not going to be modified by the function

Returns

0 in case of success

int QgsVectorLayerEditUtils::addTopologicalPoints

(

const QgsPoint &

p

)

Adds a vertex to segments which intersect point p but don't already have a vertex there.

If a feature already has a vertex at position p, no additional vertex is inserted. This method is useful for topological editing.

Parameters

p	position of the vertex

Returns

0 in case of success

int QgsVectorLayerEditUtils::boundingBoxFromPointList ( const QList< QgsPoint > &  list, double &  xmin, double &  ymin, double &  xmax, double &  ymax  ) const

protected

Little helper function that gives bounding box from a list of points.

Returns

0 in case of success

QgsGeometryCache* QgsVectorLayerEditUtils::cache ( )

inline

bool QgsVectorLayerEditUtils::deleteVertex	(	QgsFeatureId	atFeatureId,
		int	atVertex
	)

Deletes a vertex from a feature.

int QgsVectorLayerEditUtils::insertSegmentVerticesForSnap

(

const QList< QgsSnappingResult > &

snapResults

)

Inserts vertices to the snapped segments.

This is useful for topological editing if snap to segment is enabled.

Parameters

snapResults

results collected from the snapping operation

Returns

0 in case of success

bool QgsVectorLayerEditUtils::insertVertex	(	double	x,
		double	y,
		QgsFeatureId	atFeatureId,
		int	beforeVertex
	)

Insert a new vertex before the given vertex number, in the given ring, item (first number is index 0), and feature Not meaningful for Point geometries.

bool QgsVectorLayerEditUtils::moveVertex	(	double	x,
		double	y,
		QgsFeatureId	atFeatureId,
		int	atVertex
	)

Moves the vertex at the given position number, ring and item (first number is index 0), and feature to the given coordinates.

int QgsVectorLayerEditUtils::splitFeatures	(	const QList< QgsPoint > &	splitLine,
		bool	topologicalEditing = false
	)

Splits features cut by the given line.

Parameters

splitLine	line that splits the layer features
topologicalEditing	true if topological editing is enabled

Returns

0 in case of success, 4 if there is a selection but no feature split

int QgsVectorLayerEditUtils::splitParts	(	const QList< QgsPoint > &	splitLine,
		bool	topologicalEditing = false
	)

Splits parts cut by the given line.

Parameters

splitLine	line that splits the layer feature parts
topologicalEditing	true if topological editing is enabled

Returns

0 in case of success, 4 if there is a selection but no feature split

int QgsVectorLayerEditUtils::translateFeature	(	QgsFeatureId	featureId,
		double	dx,
		double	dy
	)

Translates feature by dx, dy.

Parameters

featureId	id of the feature to translate
dx	translation of x-coordinate
dy	translation of y-coordinate

Returns

0 in case of success

Member Data Documentation

QgsVectorLayer* QgsVectorLayerEditUtils::L

protected

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

• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsvectorlayereditutils.h
• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsvectorlayereditutils.cpp