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Turn antialiasing flag on when rendering legend symbol preview

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nirvn committed Apr 22, 2019
1 parent 6df8ed2 commit dab0d15d1fee7119f130c1e055bd30b5aed8d5be
Showing with 2 additions and 0 deletions.
  1. +2 −0 src/core/layertree/qgslayertreemodellegendnode.cpp
@@ -395,6 +395,7 @@ QSizeF QgsSymbolLegendNode::drawSymbol( const QgsLegendSettings &settings, ItemC
QgsRenderContext context;
context.setScaleFactor( settings.dpi() / 25.4 );
context.setRendererScale( settings.mapScale() );
context.setFlag( QgsRenderContext::Antialiasing, true );
context.setMapToPixel( QgsMapToPixel( 1 / ( settings.mmPerMapUnit() * context.scaleFactor() ) ) );
context.setForceVectorOutput( true );
context.setPainter( ctx ? ctx->painter : nullptr );
@@ -460,6 +461,7 @@ QSizeF QgsSymbolLegendNode::drawSymbol( const QgsLegendSettings &settings, ItemC
QImage tempImage = QImage( tempImageSize, QImage::Format_ARGB32 );
tempImage.fill( Qt::transparent );
QPainter imagePainter( &tempImage );
imagePainter.setRenderHint( QPainter::Antialiasing );
context.setPainter( &imagePainter );
s->drawPreviewIcon( &imagePainter, tempImageSize, &context );
context.setPainter( ctx->painter );

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