void QgsMapRendererJob::drawOldLabeling( const QgsMapSettings& settings, QgsRenderContext& renderContext )
{
// render all labels for vector layers in the stack, starting at the base
QListIterator<QString> li( settings.layers() );
li.toBack();
while ( li.hasPrevious() )
{
if ( renderContext.renderingStopped() )
{
break;
}
QString layerId = li.previous();
QgsMapLayer *ml = QgsMapLayerRegistry::instance()->mapLayer( layerId );
if ( !ml || ( ml->type() != QgsMapLayer::VectorLayer ) )
continue;
// only make labels if the layer is visible
// after scale dep viewing settings are checked
if ( ml->hasScaleBasedVisibility() && ( settings.scale() < ml->minimumScale() || settings.scale() > ml->maximumScale() ) )
continue;
const QgsCoordinateTransform* ct = 0;
QgsRectangle r1 = settings.visibleExtent(), r2;
if ( settings.hasCrsTransformEnabled() )
{
ct = settings.layerTransform( ml );
if ( ct )
reprojectToLayerExtent( ct, ml->crs().geographicFlag(), r1, r2 );
}
renderContext.setCoordinateTransform( ct );
renderContext.setExtent( r1 );
ml->drawLabels( renderContext );
}
}
static QgsQuickFeatureLayerPair _closestFeature( const QgsQuickFeatureLayerPairs &results, const QgsMapSettings &mapSettings, const QPointF &point )
{
QgsPointXY mapPoint = mapSettings.mapToPixel().toMapCoordinates( point.toPoint() );
QgsGeometry mapPointGeom( QgsGeometry::fromPointXY( mapPoint ) );
double distMin = 1e10;
int iMin = -1;
for ( int i = 0; i < results.count(); ++i )
{
const QgsQuickFeatureLayerPair &res = results.at( i );
QgsGeometry geom( res.feature().geometry() );
try
{
geom.transform( mapSettings.layerTransform( res.layer() ) );
}
catch ( QgsCsException &e )
{
Q_UNUSED( e );
// Caught an error in transform
continue;
}
double dist = geom.distance( mapPointGeom );
if ( dist < distMin )
{
iMin = i;
distMin = dist;
}
}
if ( results.empty() )
{
return QgsQuickFeatureLayerPair();
}
else
{
return results.at( iMin );
}
}
