void QgsComposerTable::refreshAttributes()
{
mMaxColumnWidthMap.clear();
mAttributeMaps.clear();
//getFeatureAttributes
if ( !getFeatureAttributes( mAttributeMaps ) )
{
return;
}
//since attributes have changed, we also need to recalculate the column widths
//and size of table
adjustFrameToSize();
}
bool QgsComposerAttributeTable::getFeatureAttributes( QList<QgsAttributeMap> &attributeMaps )
{
if ( !mVectorLayer )
{
return false;
}
QScopedPointer< QgsExpressionContext > context( createExpressionContext() );
context->setFields( mVectorLayer->fields() );
attributeMaps.clear();
//prepare filter expression
QScopedPointer<QgsExpression> filterExpression;
bool activeFilter = false;
if ( mFilterFeatures && !mFeatureFilter.isEmpty() )
{
filterExpression.reset( new QgsExpression( mFeatureFilter ) );
if ( !filterExpression->hasParserError() )
{
activeFilter = true;
}
}
QgsRectangle selectionRect;
if ( mComposerMap && mShowOnlyVisibleFeatures )
{
selectionRect = *mComposerMap->currentMapExtent();
if ( mComposition->mapSettings().hasCrsTransformEnabled() )
{
//transform back to layer CRS
QgsCoordinateTransform coordTransform( mVectorLayer->crs(), mComposition->mapSettings().destinationCrs() );
try
{
selectionRect = coordTransform.transformBoundingBox( selectionRect, QgsCoordinateTransform::ReverseTransform );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
return false;
}
}
}
QgsFeatureRequest req;
if ( !selectionRect.isEmpty() )
req.setFilterRect( selectionRect );
req.setFlags( mShowOnlyVisibleFeatures ? QgsFeatureRequest::ExactIntersect : QgsFeatureRequest::NoFlags );
QgsFeature f;
int counter = 0;
QgsFeatureIterator fit = mVectorLayer->getFeatures( req );
while ( fit.nextFeature( f ) && counter < mMaximumNumberOfFeatures )
{
context->setFeature( f );
//check feature against filter
if ( activeFilter && !filterExpression.isNull() )
{
QVariant result = filterExpression->evaluate( context.data() );
// skip this feature if the filter evaluation is false
if ( !result.toBool() )
{
continue;
}
}
attributeMaps.push_back( QgsAttributeMap() );
QList<QgsComposerTableColumn*>::const_iterator columnIt = mColumns.constBegin();
int i = 0;
for ( ; columnIt != mColumns.constEnd(); ++columnIt )
{
int idx = mVectorLayer->fieldNameIndex(( *columnIt )->attribute() );
if ( idx != -1 )
{
attributeMaps.last().insert( i, f.attributes().at( idx ) );
}
else
{
// Lets assume it's an expression
QgsExpression* expression = new QgsExpression(( *columnIt )->attribute() );
context->lastScope()->setVariable( QString( "row_number" ), counter + 1 );
expression->prepare( context.data() );
QVariant value = expression->evaluate( context.data() );
attributeMaps.last().insert( i, value.toString() );
}
i++;
}
++counter;
}
//sort the list, starting with the last attribute
QgsComposerAttributeTableCompare c;
QList< QPair<int, bool> > sortColumns = sortAttributes();
for ( int i = sortColumns.size() - 1; i >= 0; --i )
{
c.setSortColumn( sortColumns.at( i ).first );
c.setAscending( sortColumns.at( i ).second );
qStableSort( attributeMaps.begin(), attributeMaps.end(), c );
}
adjustFrameToSize();
return true;
}
void QgsComposerTable::setGridStrokeWidth( double w )
{
mGridStrokeWidth = w;
//since grid spacing has changed, we need to recalculate the table size
adjustFrameToSize();
}
void QgsComposerTable::setShowGrid( bool show )
{
mShowGrid = show;
//since grid spacing has changed, we need to recalculate the table size
adjustFrameToSize();
}
void QgsComposerTable::setContentFont( const QFont& f )
{
mContentFont = f;
//since font attributes have changed, we need to recalculate the table size
adjustFrameToSize();
}
void QgsComposerTable::setLineTextDistance( double d )
{
mLineTextDistance = d;
//since spacing has changed, we need to recalculate the table size
adjustFrameToSize();
}
