C++ (Cpp) QgsGeometry::translate示例

示例#1

bool QgsVectorLayerTools::copyMoveFeatures( QgsVectorLayer* layer, QgsFeatureRequest& request, double dx, double dy, QString* errorMsg ) const
{
    bool res = false;
    if ( !layer || !layer->isEditable() )
    {
        return false;
    }

    QgsFeatureIterator fi = layer->getFeatures( request );
    QgsFeature f;
    QgsAttributeList pkAttrList = layer->pkAttributeList();

    int browsedFeatureCount = 0;
    int couldNotWriteCount = 0;
    int noGeometryCount = 0;

    QgsFeatureIds fidList;

    while ( fi.nextFeature( f ) )
    {
        browsedFeatureCount++;
        // remove pkey values
        Q_FOREACH ( auto idx, pkAttrList )
        {
            f.setAttribute( idx, QVariant() );
        }
        // translate
        if ( f.hasGeometry() )
        {
            QgsGeometry geom = f.geometry();
            geom.translate( dx, dy );
            f.setGeometry( geom );
#ifdef QGISDEBUG
            const QgsFeatureId fid = f.id();
#endif
            // paste feature
            if ( !layer->addFeature( f, false ) )
            {
                couldNotWriteCount++;
                QgsDebugMsg( QString( "Could not add new feature. Original copied feature id: %1" ).arg( fid ) );
            }
            else
            {
                fidList.insert( f.id() );
            }
        }
        else
        {
            noGeometryCount++;
        }
    }

示例#2

文件： qgsvectorlayereditutils.cpp 项目： vmora/QGIS

int QgsVectorLayerEditUtils::translateFeature( QgsFeatureId featureId, double dx, double dy )
{
  if ( !mLayer->isSpatial() )
    return 1;

  QgsFeature f;
  if ( !mLayer->getFeatures( QgsFeatureRequest().setFilterFid( featureId ).setSubsetOfAttributes( QgsAttributeList() ) ).nextFeature( f ) || !f.hasGeometry() )
    return 1; //geometry not found

  QgsGeometry geometry = f.geometry();

  int errorCode = geometry.translate( dx, dy );
  if ( errorCode == 0 )
  {
    mLayer->editBuffer()->changeGeometry( featureId, geometry );
  }
  return errorCode;
}

示例#3

文件： qgsvectorlayereditutils.cpp 项目： rotulet/QGIS

int QgsVectorLayerEditUtils::translateFeature( QgsFeatureId featureId, double dx, double dy )
{
  if ( !L->hasGeometryType() )
    return 1;

  QgsGeometry geometry;
  if ( !cache()->geometry( featureId, geometry ) ) // maybe it's in cache
  {
    // it's not in cache: let's fetch it from layer
    QgsFeature f;
    if ( !L->getFeatures( QgsFeatureRequest().setFilterFid( featureId ).setSubsetOfAttributes( QgsAttributeList() ) ).nextFeature( f ) || !f.constGeometry() )
      return 1; //geometry not found

    geometry = *f.constGeometry();
  }

  int errorCode = geometry.translate( dx, dy );
  if ( errorCode == 0 )
  {
    L->editBuffer()->changeGeometry( featureId, &geometry );
  }
  return errorCode;
}