本文整理汇总了C++中QgsVectorDataProvider::changeGeometryValues方法的典型用法代码示例。如果您正苦于以下问题：C++ QgsVectorDataProvider::changeGeometryValues方法的具体用法？C++ QgsVectorDataProvider::changeGeometryValues怎么用？C++ QgsVectorDataProvider::changeGeometryValues使用的例子？那么, 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QgsVectorDataProvider的用法示例。
在下文中一共展示了QgsVectorDataProvider::changeGeometryValues方法的3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: commitChanges
bool QgsVectorLayerEditBuffer::commitChanges( QStringList& commitErrors )
{
QgsVectorDataProvider* provider = L->dataProvider();
commitErrors.clear();
int cap = provider->capabilities();
bool success = true;
//
// update geometries
//
if ( !mChangedGeometries.isEmpty() )
{
if (( cap & QgsVectorDataProvider::ChangeGeometries ) && provider->changeGeometryValues( mChangedGeometries ) )
{
commitErrors << tr( "SUCCESS: %n geometries were changed.", "changed geometries count", mChangedGeometries.size() );
emit committedGeometriesChanges( L->id(), mChangedGeometries );
mChangedGeometries.clear();
}
else
{
commitErrors << tr( "ERROR: %n geometries not changed.", "not changed geometries count", mChangedGeometries.size() );
success = false;
}
}
QgsFields oldFields = L->fields();
//
// delete attributes
//
bool attributesChanged = false;
if ( !mDeletedAttributeIds.isEmpty() )
{
if (( cap & QgsVectorDataProvider::DeleteAttributes ) && provider->deleteAttributes( mDeletedAttributeIds.toSet() ) )
{
commitErrors << tr( "SUCCESS: %n attribute(s) deleted.", "deleted attributes count", mDeletedAttributeIds.size() );
emit committedAttributesDeleted( L->id(), mDeletedAttributeIds );
mDeletedAttributeIds.clear();
attributesChanged = true;
}
else
{
commitErrors << tr( "ERROR: %n attribute(s) not deleted.", "not deleted attributes count", mDeletedAttributeIds.size() );
#if 0
QString list = "ERROR: Pending attribute deletes:";
Q_FOREACH ( int idx, mDeletedAttributeIds )
{
list.append( ' ' + L->pendingFields().at( idx ).name() );
}
commitErrors << list;
#endif
success = false;
}
}示例2: commitChanges
//.........这里部分代码省略.........
//
// delete features
//
if ( !mDeletedFeatureIds.isEmpty() )
{
if (( cap & QgsVectorDataProvider::DeleteFeatures ) && provider->deleteFeatures( mDeletedFeatureIds ) )
{
commitErrors << tr( "SUCCESS: %n feature(s) deleted.", "deleted features count", mDeletedFeatureIds.size() );
// TODO[MD]: we should not need this here
for ( QgsFeatureIds::const_iterator it = mDeletedFeatureIds.begin(); it != mDeletedFeatureIds.end(); it++ )
{
mChangedAttributeValues.remove( *it );
mChangedGeometries.remove( *it );
}
emit committedFeaturesRemoved( L->id(), mDeletedFeatureIds );
mDeletedFeatureIds.clear();
}
else
{
commitErrors << tr( "ERROR: %n feature(s) not deleted.", "not deleted features count", mDeletedFeatureIds.size() );
success = false;
}
}
//
// add features
//
if ( !mAddedFeatures.isEmpty() )
{
if ( cap & QgsVectorDataProvider::AddFeatures )
{
QList<QgsFeatureId> ids = mAddedFeatures.keys();
QgsFeatureList featuresToAdd = mAddedFeatures.values();
if ( provider->addFeatures( featuresToAdd ) )
{
commitErrors << tr( "SUCCESS: %n feature(s) added.", "added features count", featuresToAdd.size() );
emit committedFeaturesAdded( L->id(), featuresToAdd );
// notify everyone that the features with temporary ids were updated with permanent ids
for ( int i = 0; i < featuresToAdd.count(); ++i )
{
if ( featuresToAdd[i].id() != ids[i] )
{
emit featureDeleted( ids[i] );
emit featureAdded( featuresToAdd[i].id() );
}
}
mAddedFeatures.clear();
}
else
{
commitErrors << tr( "ERROR: %n feature(s) not added.", "not added features count", mAddedFeatures.size() );
success = false;
}
}
else
{
commitErrors << tr( "ERROR: %n feature(s) not added - provider doesn't support adding features.", "not added features count", mAddedFeatures.size() );
success = false;
}
}
}
//
// update geometries
//
if ( !mChangedGeometries.isEmpty() )
{
if (( cap & QgsVectorDataProvider::ChangeGeometries ) && provider->changeGeometryValues( mChangedGeometries ) )
{
commitErrors << tr( "SUCCESS: %n geometries were changed.", "changed geometries count", mChangedGeometries.size() );
emit committedGeometriesChanges( L->id(), mChangedGeometries );
mChangedGeometries.clear();
}
else
{
commitErrors << tr( "ERROR: %n geometries not changed.", "not changed geometries count", mChangedGeometries.size() );
success = false;
}
}
if ( !success )
{
if ( provider->hasErrors() )
{
commitErrors << tr( "\n Provider errors:" ) << provider->errors();
provider->clearErrors();
}
}
return success;
}示例3: commitChanges
bool QgsVectorLayerEditBuffer::commitChanges( QStringList &commitErrors )
{
QgsVectorDataProvider *provider = L->dataProvider();
commitErrors.clear();
int cap = provider->capabilities();
bool success = true;
// geometry updates attribute updates
// yes no => changeGeometryValues
// no yes => changeAttributeValues
// yes yes => changeFeatures
// to fix https://issues.qgis.org/issues/15741
// first of all check if feature to add is compatible with provider type
// this check have to be done before all checks to avoid to clear internal
// buffer if some of next steps success.
if ( success && !mAddedFeatures.isEmpty() )
{
if ( cap & QgsVectorDataProvider::AddFeatures )
{
if ( provider->doesStrictFeatureTypeCheck() )
{
for ( const auto &f : qgis::as_const( mAddedFeatures ) )
{
if ( ( ! f.hasGeometry() ) ||
( f.geometry().wkbType() == provider->wkbType() ) )
continue;
if ( provider->convertToProviderType( f.geometry() ).isNull() )
{
commitErrors << tr( "ERROR: %n feature(s) not added - geometry type is not compatible with the current layer.", "not added features count", mAddedFeatures.size() );
success = false;
break;
}
}
}
}
else
{
commitErrors << tr( "ERROR: %n feature(s) not added - provider doesn't support adding features.", "not added features count", mAddedFeatures.size() );
success = false;
}
}
//
// update geometries
//
if ( !mChangedGeometries.isEmpty() && ( ( cap & QgsVectorDataProvider::ChangeFeatures ) == 0 || mChangedAttributeValues.isEmpty() ) )
{
if ( provider->changeGeometryValues( mChangedGeometries ) )
{
commitErrors << tr( "SUCCESS: %n geometries were changed.", "changed geometries count", mChangedGeometries.size() );
emit committedGeometriesChanges( L->id(), mChangedGeometries );
mChangedGeometries.clear();
}
else
{
commitErrors << tr( "ERROR: %n geometries not changed.", "not changed geometries count", mChangedGeometries.size() );
success = false;
}
}
QgsFields oldFields = L->fields();
//
// delete attributes
//
bool attributesChanged = false;
if ( !mDeletedAttributeIds.isEmpty() )
{
if ( ( cap & QgsVectorDataProvider::DeleteAttributes ) && provider->deleteAttributes( mDeletedAttributeIds.toSet() ) )
{
commitErrors << tr( "SUCCESS: %n attribute(s) deleted.", "deleted attributes count", mDeletedAttributeIds.size() );
emit committedAttributesDeleted( L->id(), mDeletedAttributeIds );
mDeletedAttributeIds.clear();
attributesChanged = true;
}
else
{
commitErrors << tr( "ERROR: %n attribute(s) not deleted.", "not deleted attributes count", mDeletedAttributeIds.size() );
#if 0
QString list = "ERROR: Pending attribute deletes:";
Q_FOREACH ( int idx, mDeletedAttributeIds )
{
list.append( ' ' + L->fields().at( idx ).name() );
}
commitErrors << list;
#endif
success = false;
}
}