QgsGeometryEditUtils class

Convenience functions for geometry editing.

Public static functions

static auto addPart(QgsAbstractGeometry* geometry, std::unique_ptr<QgsAbstractGeometry> part) -> QgsGeometry::OperationResult: Add a part to multi type geometry.
static auto addRing(QgsAbstractGeometry* geometry, std::unique_ptr<QgsCurve> ring) -> QgsGeometry::OperationResult: Add an interior ring to a geometry.
static auto avoidIntersections(const QgsAbstractGeometry& geom, const QList<QgsVectorLayer*>& avoidIntersectionsLayers, const QHash<QgsVectorLayer*, QSet<QgsFeatureId>>& ignoreFeatures = (QHash<QgsVectorLayer*, QSet<QgsFeatureId>>())) -> std::unique_ptr<QgsAbstractGeometry>: Alters a geometry so that it avoids intersections with features from all open vector layers.
static auto deletePart(QgsAbstractGeometry* geom, int partNum) -> bool: Deletes a part from a geometry.
static auto deleteRing(QgsAbstractGeometry* geom, int ringNum, int partNum = 0) -> bool: Deletes a ring from a geometry.

Add a part to multi type geometry.

Returns	0 in case of success, 1 if not a multigeometry, 2 if part is not a valid geometry, 3 if new polygon ring not disjoint with existing polygons of the feature

Ownership of the part is transferred.

Add an interior ring to a geometry.

Returns	0 in case of success (ring added), 1 problem with geometry type, 2 ring not closed, 3 ring is not valid geometry, 4 ring not disjoint with existing rings, 5 no polygon found which contained the ring

Ownership of the ring is transferred.

Alters a geometry so that it avoids intersections with features from all open vector layers.

Parameters
geom	geometry to alter
avoidIntersectionsLayers	list of layers to check for intersections
ignoreFeatures	map of layer to feature id of features to ignore

Deletes a part from a geometry.

Returns	true if delete was successful

Deletes a ring from a geometry.

Returns	true if delete was successful