本文整理汇总了C++中qgsfeaturelist::iterator::geometryAndOwnership方法的典型用法代码示例。如果您正苦于以下问题：C++ iterator::geometryAndOwnership方法的具体用法？C++ iterator::geometryAndOwnership怎么用？C++ iterator::geometryAndOwnership使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgsfeaturelist::iterator的用法示例。
在下文中一共展示了iterator::geometryAndOwnership方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: createOriginGeometry
QgsGeometry* QgsMapToolOffsetCurve::createOriginGeometry( QgsVectorLayer* vl, const QgsPointLocator::Match& match, QgsFeature& snappedFeature )
{
if ( !vl )
{
return 0;
}
mMultiPartGeometry = false;
//assign feature part by vertex number (snap to vertex) or by before vertex number (snap to segment)
int partVertexNr = match.vertexIndex();
if ( vl == currentVectorLayer() && !mForceCopy )
{
//don't consider selected geometries, only the snap result
return convertToSingleLine( snappedFeature.geometryAndOwnership(), partVertexNr, mMultiPartGeometry );
}
else //snapped to a background layer
{
//if source layer is polygon / multipolygon, create a linestring from the snapped ring
if ( vl->geometryType() == QGis::Polygon )
{
//make linestring from polygon ring and return this geometry
return linestringFromPolygon( snappedFeature.geometry(), partVertexNr );
}
//for background layers, try to merge selected entries together if snapped feature is contained in selection
const QgsFeatureIds& selection = vl->selectedFeaturesIds();
if ( selection.size() < 1 || !selection.contains( match.featureId() ) )
{
return convertToSingleLine( snappedFeature.geometryAndOwnership(), partVertexNr, mMultiPartGeometry );
}
else
{
//merge together if several features
QgsFeatureList selectedFeatures = vl->selectedFeatures();
QgsFeatureList::iterator selIt = selectedFeatures.begin();
QgsGeometry* geom = selIt->geometryAndOwnership();
++selIt;
for ( ; selIt != selectedFeatures.end(); ++selIt )
{
QgsGeometry* combined = geom->combine( selIt->geometry() );
delete geom;
geom = combined;
}
//if multitype, return only the snapped to geometry
if ( geom->isMultipart() )
{
delete geom;
return convertToSingleLine( snappedFeature.geometryAndOwnership(), match.vertexIndex(), mMultiPartGeometry );
}
return geom;
}
}
}