bool QgsMemoryProvider::addAttributes( const QList<QgsField> &attributes )
{
for ( QList<QgsField>::const_iterator it = attributes.begin(); it != attributes.end(); ++it )
{
// Why are attributes restricted to int,double and string only?
switch ( it->type() )
{
case QVariant::Int:
case QVariant::Double:
case QVariant::String:
case QVariant::Date:
case QVariant::LongLong:
break;
default:
QgsDebugMsg( "Field type not supported: " + it->typeName() );
continue;
}
// add new field as a last one
mFields.append( *it );
for ( QgsFeatureMap::iterator fit = mFeatures.begin(); fit != mFeatures.end(); ++fit )
{
QgsFeature& f = fit.value();
f.attributes().append( QVariant() );
}
}
return true;
}
void QgsVectorLayerUndoCommandChangeGeometry::undo()
{
if ( FID_IS_NEW( mFid ) )
{
// modify added features
QgsFeatureMap::iterator it = mBuffer->mAddedFeatures.find( mFid );
Q_ASSERT( it != mBuffer->mAddedFeatures.end() );
it.value().setGeometry( mOldGeom );
emit mBuffer->geometryChanged( mFid, mOldGeom );
}
else
{
// existing feature
if ( mOldGeom.isNull() )
{
mBuffer->mChangedGeometries.remove( mFid );
QgsFeature f;
if ( layer()->getFeatures( QgsFeatureRequest().setFilterFid( mFid ).setNoAttributes() ).nextFeature( f ) && f.hasGeometry() )
{
emit mBuffer->geometryChanged( mFid, f.geometry() );
}
}
else
{
mBuffer->mChangedGeometries[mFid] = mOldGeom;
emit mBuffer->geometryChanged( mFid, mOldGeom );
}
}
}
void QgsMemoryProvider::updateExtent()
{
if ( mFeatures.count() == 0 )
{
mExtent = QgsRectangle();
}
else
{
mExtent = mFeatures.begin().value().geometry()->boundingBox();
for ( QgsFeatureMap::iterator it = mFeatures.begin(); it != mFeatures.end(); ++it )
mExtent.unionRect( it.value().geometry()->boundingBox() );
}
}
void QgsVectorLayerUndoCommandChangeGeometry::redo()
{
if ( FID_IS_NEW( mFid ) )
{
// modify added features
QgsFeatureMap::iterator it = mBuffer->mAddedFeatures.find( mFid );
Q_ASSERT( it != mBuffer->mAddedFeatures.end() );
it.value().setGeometry( mNewGeom );
}
else
{
mBuffer->mChangedGeometries[ mFid ] = mNewGeom;
}
emit mBuffer->geometryChanged( mFid, mNewGeom );
}
void QgsVectorLayerUndoCommandDeleteAttribute::undo()
{
if ( mProviderField )
{
mBuffer->mDeletedAttributeIds.removeOne( mOriginIndex );
}
else
{
// newly added attribute
mBuffer->mAddedAttributes.insert( mOriginIndex, mOldField );
}
mBuffer->updateLayerFields();
mBuffer->handleAttributeAdded( mFieldIndex ); // update changed attributes + new features
if ( !mOldName.isEmpty() )
{
mBuffer->mRenamedAttributes[ mFieldIndex ] = mOldName;
mBuffer->updateLayerFields();
}
// set previously used attributes of new features
for ( QgsFeatureMap::iterator it = mBuffer->mAddedFeatures.begin(); it != mBuffer->mAddedFeatures.end(); ++it )
{
QgsFeature& f = it.value();
f.setAttribute( mFieldIndex, mDeletedValues.value( f.id() ) );
}
// set previously used changed attributes
for ( QMap<QgsFeatureId, QVariant>::const_iterator it = mDeletedValues.constBegin(); it != mDeletedValues.constEnd(); ++it )
{
if ( !FID_IS_NEW( it.key() ) )
{
QgsAttributeMap& attrs = mBuffer->mChangedAttributeValues[it.key()]; // also adds record if nonexistant
attrs.insert( mFieldIndex, it.value() );
}
}
QgsEditFormConfig formConfig = mBuffer->L->editFormConfig();
formConfig.setWidgetConfig( mFieldName, mOldEditorWidgetConfig );
mBuffer->L->setEditFormConfig( formConfig );
emit mBuffer->attributeAdded( mFieldIndex );
}
bool QgsMemoryProvider::deleteAttributes( const QgsAttributeIds& attributes )
{
QList<int> attrIdx = attributes.toList();
qSort( attrIdx.begin(), attrIdx.end(), qGreater<int>() );
// delete attributes one-by-one with decreasing index
for ( QList<int>::const_iterator it = attrIdx.constBegin(); it != attrIdx.constEnd(); ++it )
{
int idx = *it;
mFields.remove( idx );
for ( QgsFeatureMap::iterator fit = mFeatures.begin(); fit != mFeatures.end(); ++fit )
{
QgsFeature& f = fit.value();
f.attributes().remove( idx );
}
}
return true;
}
void QgsVectorLayerUndoCommandChangeAttribute::redo()
{
if ( FID_IS_NEW( mFid ) )
{
// updated added feature
QgsFeatureMap::iterator it = mBuffer->mAddedFeatures.find( mFid );
Q_ASSERT( it != mBuffer->mAddedFeatures.end() );
it.value().setAttribute( mFieldIndex, mNewValue );
}
else
{
// changed attribute of existing feature
if ( !mBuffer->mChangedAttributeValues.contains( mFid ) )
{
mBuffer->mChangedAttributeValues.insert( mFid, QgsAttributeMap() );
}
mBuffer->mChangedAttributeValues[mFid].insert( mFieldIndex, mNewValue );
}
emit mBuffer->attributeValueChanged( mFid, mFieldIndex, mNewValue );
}
void QgsVectorLayerUndoCommandChangeAttribute::undo()
{
QVariant original = mOldValue;
if ( FID_IS_NEW( mFid ) )
{
// added feature
QgsFeatureMap::iterator it = mBuffer->mAddedFeatures.find( mFid );
Q_ASSERT( it != mBuffer->mAddedFeatures.end() );
it.value().setAttribute( mFieldIndex, mOldValue );
}
else if ( mFirstChange )
{
// existing feature
mBuffer->mChangedAttributeValues[mFid].remove( mFieldIndex );
if ( mBuffer->mChangedAttributeValues[mFid].isEmpty() )
mBuffer->mChangedAttributeValues.remove( mFid );
if ( !mOldValue.isValid() )
{
// get old value from provider
QgsFeature tmp;
QgsFeatureRequest request;
request.setFilterFid( mFid );
request.setFlags( QgsFeatureRequest::NoGeometry );
request.setSubsetOfAttributes( QgsAttributeList() << mFieldIndex );
QgsFeatureIterator fi = layer()->getFeatures( request );
if ( fi.nextFeature( tmp ) )
original = tmp.attribute( mFieldIndex );
}
}
else
{
mBuffer->mChangedAttributeValues[mFid][mFieldIndex] = mOldValue;
}
emit mBuffer->attributeValueChanged( mFid, mFieldIndex, original );
}