mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-27 00:33:48 -05:00
af0d68b882
Faster than QgsGeometry::isGeosEmpty() because it avoids the conversion to GEOS geometries and just uses the QgsAbstractGeometry subclasses directly. Also implements faster isEmpty() overrides for specific QgsAbstractGeometry subclasses.
121 lines
4.6 KiB
Plaintext
121 lines
4.6 KiB
Plaintext
class QgsGeometryCollection: public QgsAbstractGeometry
|
|
{
|
|
%TypeHeaderCode
|
|
#include <qgsgeometrycollection.h>
|
|
%End
|
|
|
|
public:
|
|
QgsGeometryCollection();
|
|
QgsGeometryCollection( const QgsGeometryCollection& c );
|
|
//QgsGeometryCollection& operator=( const QgsGeometryCollection& c );
|
|
virtual ~QgsGeometryCollection();
|
|
|
|
virtual QgsGeometryCollection* clone() const /Factory/;
|
|
|
|
/** Returns the number of geometries within the collection.
|
|
*/
|
|
int numGeometries() const;
|
|
|
|
/** Returns a const reference to a geometry from within the collection.
|
|
* @param n index of geometry to return
|
|
*/
|
|
//const QgsAbstractGeometry* geometryN( int n ) const;
|
|
|
|
/** Returns a geometry from within the collection.
|
|
* @param n index of geometry to return
|
|
*/
|
|
QgsAbstractGeometry* geometryN( int n );
|
|
|
|
//methods inherited from QgsAbstractGeometry
|
|
bool isEmpty() const;
|
|
virtual int dimension() const;
|
|
virtual QString geometryType() const;
|
|
virtual void clear();
|
|
virtual QgsAbstractGeometry* boundary() const /Factory/;
|
|
|
|
/** Adds a geometry and takes ownership. Returns true in case of success.*/
|
|
virtual bool addGeometry( QgsAbstractGeometry* g /Transfer/ );
|
|
|
|
/** Inserts a geometry before a specified index and takes ownership. Returns true in case of success.
|
|
* @param g geometry to insert. Ownership is transferred to the collection.
|
|
* @param index position to insert geometry before
|
|
*/
|
|
virtual bool insertGeometry( QgsAbstractGeometry* g /Transfer/, int index );
|
|
|
|
/** Removes a geometry from the collection.
|
|
* @param nr index of geometry to remove
|
|
* @returns true if removal was successful.
|
|
*/
|
|
virtual bool removeGeometry( int nr );
|
|
|
|
void transform( const QgsCoordinateTransform& ct, QgsCoordinateTransform::TransformDirection d = QgsCoordinateTransform::ForwardTransform,
|
|
bool transformZ = false );
|
|
void transform( const QTransform& t );
|
|
|
|
//virtual void clip( const QgsRectangle& rect );
|
|
|
|
virtual void draw( QPainter& p ) const;
|
|
|
|
bool fromWkb( QgsConstWkbPtr& wkb );
|
|
virtual bool fromWkt( const QString& wkt );
|
|
QByteArray asWkb() const;
|
|
QString asWkt( int precision = 17 ) const;
|
|
QDomElement asGML2( QDomDocument& doc, int precision = 17, const QString& ns = "gml" ) const;
|
|
QDomElement asGML3( QDomDocument& doc, int precision = 17, const QString& ns = "gml" ) const;
|
|
QString asJSON( int precision = 17 ) const;
|
|
|
|
virtual QgsRectangle boundingBox() const;
|
|
|
|
virtual QList< QList< QList< QgsPointV2 > > > coordinateSequence() const;
|
|
virtual int nCoordinates() const;
|
|
virtual double closestSegment( const QgsPointV2& pt, QgsPointV2& segmentPt, QgsVertexId& vertexAfter, bool* leftOf, double epsilon ) const;
|
|
bool nextVertex( QgsVertexId& id, QgsPointV2& vertex ) const;
|
|
|
|
//low-level editing
|
|
virtual bool insertVertex( QgsVertexId position, const QgsPointV2& vertex );
|
|
virtual bool moveVertex( QgsVertexId position, const QgsPointV2& newPos );
|
|
virtual bool deleteVertex( QgsVertexId position );
|
|
|
|
virtual double length() const;
|
|
virtual double area() const;
|
|
virtual double perimeter() const;
|
|
|
|
bool hasCurvedSegments() const;
|
|
|
|
/** Returns a geometry without curves. Caller takes ownership
|
|
* @param tolerance segmentation tolerance
|
|
* @param toleranceType maximum segmentation angle or maximum difference between approximation and curve*/
|
|
QgsAbstractGeometry* segmentize( double tolerance = M_PI_2 / 90, SegmentationToleranceType toleranceType = MaximumAngle ) const /Factory/;
|
|
|
|
/** Returns approximate rotation angle for a vertex. Usually average angle between adjacent segments.
|
|
* @param vertex the vertex id
|
|
* @return rotation in radians, clockwise from north
|
|
*/
|
|
double vertexAngle( QgsVertexId vertex ) const;
|
|
|
|
virtual int vertexCount( int part = 0, int ring = 0 ) const;
|
|
virtual int ringCount( int part = 0 ) const;
|
|
virtual int partCount() const;
|
|
virtual QgsPointV2 vertexAt( QgsVertexId id ) const;
|
|
|
|
virtual bool addZValue( double zValue = 0 );
|
|
virtual bool addMValue( double mValue = 0 );
|
|
virtual bool dropZValue();
|
|
virtual bool dropMValue();
|
|
|
|
protected:
|
|
|
|
/** Returns whether child type names are omitted from Wkt representations of the collection
|
|
* @note added in QGIS 2.12
|
|
*/
|
|
virtual bool wktOmitChildType() const;
|
|
|
|
/** Reads a collection from a WKT string.
|
|
*/
|
|
bool fromCollectionWkt( const QString &wkt, const QList<QgsAbstractGeometry*>& subtypes, const QString& defaultChildWkbType = QString() );
|
|
|
|
virtual QgsRectangle calculateBoundingBox() const;
|
|
virtual void clearCache() const;
|
|
|
|
};
|