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Make additional sort caches accessible

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Matthias Kuhn 2018-05-17 08:57:06 +02:00
parent 2325fe5a39
commit 9963892790
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3 changed files with 19 additions and 10 deletions
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10
python/gui/auto_generated/attributetable/qgsattributetablemodel.sip.in
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@ -194,14 +194,18 @@ Specify -1 as column to invalidate the cache
void prefetchSortData( const QString &expression, unsigned long cacheIndex = 0 ); void prefetchSortData( const QString &expression, unsigned long cacheIndex = 0 );
%Docstring %Docstring
Prefetches the entire data for one expression. Based on this cached information Prefetches the entire data for one expression. Based on this cached information
the sorting can later be done in a performant way. the sorting can later be done in a performant way. A ``cacheIndex`` can be specified
if multiple caches should be filled. In this case, the caches will be available
as ``QgsAttributeTableModel.SortRole + cacheIndex``.
:param expression: The expression to cache :param expression: The expression to cache
%End %End
QString sortCacheExpression() const; QString sortCacheExpression( unsigned long cacheIndex = 0 ) const;
%Docstring %Docstring
The expression which was used to fill the sorting cache The expression which was used to fill the sorting cache at index \cacheIndex.
.. seealso:: :py:func:`prefetchSortData`
%End %End
void setRequest( const QgsFeatureRequest &request ); void setRequest( const QgsFeatureRequest &request );

9
src/gui/attributetable/qgsattributetablemodel.cpp
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@ -908,13 +908,14 @@ void QgsAttributeTableModel::prefetchSortData( const QString &expressionString,
} }
} }
QString QgsAttributeTableModel::sortCacheExpression() const QString QgsAttributeTableModel::sortCacheExpression( unsigned long cacheIndex ) const
{ {
Q_ASSERT( !mSortCaches.empty() );
QString expressionString; QString expressionString;
const QgsExpression &expression = mSortCaches.begin()->sortCacheExpression; if ( cacheIndex >= mSortCaches.size() )
return expressionString;
const QgsExpression &expression = mSortCaches[cacheIndex].sortCacheExpression;
if ( expression.isValid() ) if ( expression.isValid() )
expressionString = expression.expression(); expressionString = expression.expression();

10
src/gui/attributetable/qgsattributetablemodel.h
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@ -200,16 +200,20 @@ class GUI_EXPORT QgsAttributeTableModel: public QAbstractTableModel
/** /**
* Prefetches the entire data for one expression. Based on this cached information * Prefetches the entire data for one expression. Based on this cached information
* the sorting can later be done in a performant way. * the sorting can later be done in a performant way. A \a cacheIndex can be specified
* if multiple caches should be filled. In this case, the caches will be available
* as ``QgsAttributeTableModel::SortRole + cacheIndex``.
* *
* \param expression The expression to cache * \param expression The expression to cache
*/ */
void prefetchSortData( const QString &expression, unsigned long cacheIndex = 0 ); void prefetchSortData( const QString &expression, unsigned long cacheIndex = 0 );
/** /**
* The expression which was used to fill the sorting cache * The expression which was used to fill the sorting cache at index \cacheIndex.
*
* \see prefetchSortData
*/ */
QString sortCacheExpression() const; QString sortCacheExpression( unsigned long cacheIndex = 0 ) const;
/** /**
* Set a request that will be used to fill this attribute table model. * Set a request that will be used to fill this attribute table model.