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92 lines
3.5 KiB
Plaintext
92 lines
3.5 KiB
Plaintext
class QgsVectorLayerEditUtils
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{
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%TypeHeaderCode
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#include <qgsvectorlayereditutils.h>
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%End
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public:
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QgsVectorLayerEditUtils( QgsVectorLayer* layer );
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QgsGeometryCache* cache();
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/** Insert a new vertex before the given vertex number,
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* in the given ring, item (first number is index 0), and feature
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* Not meaningful for Point geometries
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*/
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bool insertVertex( double x, double y, QgsFeatureId atFeatureId, int beforeVertex );
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/** Moves the vertex at the given position number,
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* ring and item (first number is index 0), and feature
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* to the given coordinates
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*/
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bool moveVertex( double x, double y, QgsFeatureId atFeatureId, int atVertex );
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/** Deletes a vertex from a feature
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*/
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bool deleteVertex( QgsFeatureId atFeatureId, int atVertex );
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/** Adds a ring to polygon/multipolygon features
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@return
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0 in case of success,
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1 problem with feature type,
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2 ring not closed,
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3 ring not valid,
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4 ring crosses existing rings,
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5 no feature found where ring can be inserted*/
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int addRing( const QList<QgsPoint>& ring );
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/** Adds a new part polygon to a multipart feature
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@return
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0 in case of success,
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1 if selected feature is not multipart,
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2 if ring is not a valid geometry,
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3 if new polygon ring not disjoint with existing rings,
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4 if no feature was selected,
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5 if several features are selected,
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6 if selected geometry not found*/
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int addPart( const QList<QgsPoint>& ring, QgsFeatureId featureId );
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/** Translates feature by dx, dy
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@param featureId id of the feature to translate
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@param dx translation of x-coordinate
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@param dy translation of y-coordinate
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@return 0 in case of success*/
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int translateFeature( QgsFeatureId featureId, double dx, double dy );
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/** Splits features cut by the given line
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* @param splitLine line that splits the layer features
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* @param topologicalEditing true if topological editing is enabled
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* @return
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* 0 in case of success,
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* 4 if there is a selection but no feature split
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*/
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int splitFeatures( const QList<QgsPoint>& splitLine, bool topologicalEditing = false );
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/** Adds topological points for every vertex of the geometry.
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* @param geom the geometry where each vertex is added to segments of other features
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* @note geom is not going to be modified by the function
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* @return 0 in case of success
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*/
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int addTopologicalPoints( QgsGeometry* geom );
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/** Adds a vertex to segments which intersect point p but don't
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* already have a vertex there. If a feature already has a vertex at position p,
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* no additional vertex is inserted. This method is useful for topological
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* editing.
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* @param p position of the vertex
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* @return 0 in case of success
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*/
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int addTopologicalPoints( const QgsPoint& p );
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/** Inserts vertices to the snapped segments.
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* This is useful for topological editing if snap to segment is enabled.
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* @param snapResults results collected from the snapping operation
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* @return 0 in case of success
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*/
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int insertSegmentVerticesForSnap( const QList<QgsSnappingResult>& snapResults );
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protected:
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/** Little helper function that gives bounding box from a list of points.
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@return 0 in case of success */
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int boundingBoxFromPointList( const QList<QgsPoint>& list, double& xmin, double& ymin, double& xmax, double& ymax ) const;
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};
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