std::unique_ptr<QgsMultiLineString> QgsGeometryFactory::fromMultiPolylineXY( const QgsMultiPolylineXY &multiline )
{
std::unique_ptr< QgsMultiLineString > mLine = qgis::make_unique< QgsMultiLineString >();
for ( int i = 0; i < multiline.size(); ++i )
{
mLine->addGeometry( fromPolylineXY( multiline.at( i ) ).release() );
}
return mLine;
}
void QgsMapToolOffsetCurve::prepareGeometry( const QgsPointLocator::Match &match, QgsFeature &snappedFeature )
{
QgsVectorLayer *vl = match.layer();
if ( !vl )
{
return;
}
mOriginalGeometry = QgsGeometry();
mManipulatedGeometry = QgsGeometry();
mModifiedPart = -1;
mModifiedRing = -1;
//assign feature part by vertex number (snap to vertex) or by before vertex number (snap to segment)
QgsGeometry geom = snappedFeature.geometry();
if ( geom.isNull() )
{
return;
}
mOriginalGeometry = geom;
QgsWkbTypes::Type geomType = geom.wkbType();
if ( QgsWkbTypes::geometryType( geomType ) == QgsWkbTypes::LineGeometry )
{
if ( !match.hasEdge() )
{
return;
}
if ( !geom.isMultipart() )
{
mManipulatedGeometry = geom;
}
else
{
int vertex = match.vertexIndex();
QgsVertexId vertexId;
geom.vertexIdFromVertexNr( vertex, vertexId );
mModifiedPart = vertexId.part;
QgsMultiPolylineXY multiLine = geom.asMultiPolyline();
mManipulatedGeometry = QgsGeometry::fromPolylineXY( multiLine.at( mModifiedPart ) );
}
}
else if ( QgsWkbTypes::geometryType( geomType ) == QgsWkbTypes::PolygonGeometry )
{
if ( !match.hasEdge() && match.hasArea() )
{
if ( !geom.isMultipart() )
{
mManipulatedGeometry = geom;
}
else
{
// get the correct part
QgsMultiPolygonXY mpolygon = geom.asMultiPolygon();
for ( int part = 0; part < mpolygon.count(); part++ ) // go through the polygons
{
const QgsPolygonXY &polygon = mpolygon[part];
QgsGeometry partGeo = QgsGeometry::fromPolygonXY( polygon );
const QgsPointXY layerCoords = match.point();
if ( partGeo.contains( &layerCoords ) )
{
mModifiedPart = part;
mManipulatedGeometry = partGeo;
}
}
}
}
else if ( match.hasEdge() )
{
int vertex = match.vertexIndex();
QgsVertexId vertexId;
geom.vertexIdFromVertexNr( vertex, vertexId );
QgsDebugMsg( QStringLiteral( "%1" ).arg( vertexId.ring ) );
if ( !geom.isMultipart() )
{
QgsPolygonXY poly = geom.asPolygon();
// if has rings
if ( poly.count() > 0 )
{
mModifiedRing = vertexId.ring;
mManipulatedGeometry = QgsGeometry::fromPolygonXY( QgsPolygonXY() << poly.at( mModifiedRing ) );
}
else
{
mManipulatedGeometry = QgsGeometry::fromPolygonXY( poly );
}
}
else
{
mModifiedPart = vertexId.part;
// get part, get ring
QgsMultiPolygonXY multiPoly = geom.asMultiPolygon();
// if has rings
if ( multiPoly.at( mModifiedPart ).count() > 0 )
{
mModifiedRing = vertexId.ring;
mManipulatedGeometry = QgsGeometry::fromPolygonXY( QgsPolygonXY() << multiPoly.at( mModifiedPart ).at( mModifiedRing ) );
}
else
{
mManipulatedGeometry = QgsGeometry::fromPolygonXY( multiPoly.at( mModifiedPart ) );
}
}
}
}
}