在QGIS的C++ API中,你可以通过QgsVectorLayer的deleteFeature方法来删除特定的QgsFeature。 确认删除操作是否成功,并检查属性表是否已同步删除: 删除QgsFeature后,应检查操作是否成功,并验证属性表中相应的记录是否已被删除。 如果属性表未自动删除,则手动删除对应的属性表记录: 在某些情况下,删除QgsFeature可能不会自动删除...
1.对单个元素的函数使用线程池: # encoding:utf-8 __author__='xijun.gong' import threadpool ...
import tempfile # Create memory layer and insert a feature memoryLayer = QgsVectorLayer("Point", "memory", "memory") f = QgsFeature() f.setGeometry(QgsGeometry.fromWkt("Point (1 1)")) assert memoryLayer.startEditing(), "impossible to edit layer" assert memoryLayer.addFeature(f), "featur...
一个简单的例子： type mbf = function(hWnd: HWND; lpText, lpCaption: PChar; uType: UINT)...
bool QgsFeaturePool::getFeature( QgsFeatureId id, QgsFeature &feature ) @@ -75,7 +75,8 @@ QgsFeatureIds QgsFeaturePool::getFeatures( const QgsFeatureRequest &request, Qgs { QgsReadWriteLocker locker( mCacheLock, QgsReadWriteLocker::Write );...
在下文中一共展示了QgsFeature::setAttribute方法的15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: exportPath ▲点赞 6▼ voidRgShortestPathWidget::exportPath() ...
QgsGeometry::OperationResult QgsVectorLayerEditUtils::addPart( QgsCurve *ring, QgsFeatureId featureId ) {if( !mLayer->isSpatial() )returnQgsGeometry::AddPartSelectedGeometryNotFound; QgsGeometry geometry;boolfirstPart =false; QgsFeature f;if( !mLayer->getFeatures( QgsFeatureRequest().setFilterFid...
virtual void updateFeature( QgsFeature &feature ) = 0; %Docstring Updates a feature in this pool. Implementations will update the feature on the layer or on the data provider. .. warning:: This method can safely be called from a different thread vs the object's creation thread or the orig...
在下文中一共展示了QgsFeature类的15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: currentVectorLayer ▲点赞 6▼ voidQgsMapToolOffsetCurve::applyOffset() ...
filter = renderer->capabilities() & QgsFeatureRendererV2::Filter; }for( ; f_it != featureList.end(); ++f_it ) { QMap< QString, QString > derivedAttributes = commonDerivedAttributes; QgsFeatureId fid = f_it->id(); context.expressionContext().setFeature( *f_it );if( filter && !rend...